INFO: task hung in snd_seq_ioctl
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syzbot
Jul 25, 2019, 8:45:07 PM7/25/19
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: ff33472c Linux 4.14.134
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1493809fa00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7918dc8aa910a9fb
dashboard link: https://syzkaller.appspot.com/bug?extid=db4ebb6e7a940a3f2e04
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+db4ebb...@syzkaller.appspotmail.com
netlink: 20 bytes leftover after parsing attributes in process
`syz-executor.3'.
netlink: 20 bytes leftover after parsing attributes in process
`syz-executor.2'.
INFO: task syz-executor.4:9935 blocked for more than 140 seconds.
Not tainted 4.14.134 #30
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D30160 9935 7136 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383
schedule+0x92/0x1c0 kernel/sched/core.c:3427
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
snd_seq_ioctl+0x1a3/0x320 sound/core/seq/seq_clientmgr.c:2135
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459829
RSP: 002b:00007fe4f35f6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000020000740 RSI: 00000000c08c5334 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe4f35f76d4
R13: 00000000004cd800 R14: 00000000004d7750 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1013:
#0: (tasklist_lock){.+.+}, at: [<ffffffff81483258>]
debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541
2 locks held by getty/7087:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7088:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7089:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7090:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7091:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7092:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7093:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.1/7191:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/7207:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7236:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7313:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7337:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7360:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/7380:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7385:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7409:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7423:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7448:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7469:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7502:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7520:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7680:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7686:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7713:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7716:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7764:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7785:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/7788:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7792:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7806:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/7828:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/7881:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7984:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7996:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8006:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8021:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8026:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8045:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8046:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8047:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8049:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8060:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8136:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8170:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8190:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8211:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8212:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8213:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8216:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8243:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8244:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8246:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8274:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8277:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8470:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8491:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8494:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8499:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8523:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8546:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8600:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8603:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8628:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8652:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8693:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8694:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8695:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8702:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8719:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8722:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8752:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8756:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8777:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8841:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8847:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8848:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8850:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8872:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8880:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8915:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8929:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9044:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9049:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9085:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9087:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/9122:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9126:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9161:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/9163:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/9225:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9226:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9263:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9276:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9294:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9316:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9322:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9411:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9418:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9438:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9444:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9456:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9473:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9563:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9596:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9715:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9716:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9735:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9770:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9784:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9809:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9842:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9920:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
1 lock held by syz-executor.4/9935:
#0: (&client->ioctl_mutex){+.+.}, at: [<ffffffff84b73133>]
snd_seq_ioctl+0x1a3/0x320 sound/core/seq/seq_clientmgr.c:2135
=============================================
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: ff33472c Linux 4.14.134
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1493809fa00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7918dc8aa910a9fb
dashboard link: https://syzkaller.appspot.com/bug?extid=db4ebb6e7a940a3f2e04
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+db4ebb...@syzkaller.appspotmail.com
netlink: 20 bytes leftover after parsing attributes in process
`syz-executor.3'.
netlink: 20 bytes leftover after parsing attributes in process
`syz-executor.2'.
INFO: task syz-executor.4:9935 blocked for more than 140 seconds.
Not tainted 4.14.134 #30
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D30160 9935 7136 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383
schedule+0x92/0x1c0 kernel/sched/core.c:3427
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
snd_seq_ioctl+0x1a3/0x320 sound/core/seq/seq_clientmgr.c:2135
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459829
RSP: 002b:00007fe4f35f6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000020000740 RSI: 00000000c08c5334 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe4f35f76d4
R13: 00000000004cd800 R14: 00000000004d7750 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1013:
#0: (tasklist_lock){.+.+}, at: [<ffffffff81483258>]
debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541
2 locks held by getty/7087:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7088:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7089:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7090:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7091:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7092:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7093:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff831064f6>]
n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.1/7191:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/7207:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7236:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7313:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7337:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7360:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/7380:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7385:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7409:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7423:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7448:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7469:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7502:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7520:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7680:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7686:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7713:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7716:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7764:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7785:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/7788:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7792:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7806:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/7828:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/7881:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/7984:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/7996:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8006:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8021:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8026:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8045:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8046:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8047:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8049:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8060:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8136:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8170:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8190:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8211:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8212:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8213:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8216:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8243:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8244:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8246:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8274:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8277:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8470:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8491:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8494:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8499:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8523:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8546:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8600:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8603:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8628:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.5/8652:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8693:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8694:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8695:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8702:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8719:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8722:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8752:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8756:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8777:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8841:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/8847:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8848:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8850:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/8872:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8880:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/8915:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/8929:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9044:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9049:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9085:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9087:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/9122:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9126:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9161:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/9163:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.0/9225:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9226:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9263:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9276:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9294:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9316:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9322:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9411:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9418:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9438:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9444:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9456:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9473:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9563:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9596:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9715:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9716:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9735:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9770:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.2/9784:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9809:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.1/9842:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
2 locks held by syz-executor.3/9920:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b4663>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&tty->atomic_write_lock){+.+.}, at: [<ffffffff830f7db0>]
tty_write_lock+0x20/0x60 drivers/tty/tty_io.c:885
1 lock held by syz-executor.4/9935:
#0: (&client->ioctl_mutex){+.+.}, at: [<ffffffff84b73133>]
snd_seq_ioctl+0x1a3/0x320 sound/core/seq/seq_clientmgr.c:2135
=============================================
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot
Nov 22, 2019, 6:45:06 PM11/22/19
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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