INFO: task hung in usb_bulk_msg
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syzbot
Apr 15, 2019, 3:30:06 AM4/15/19
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 4d552acf Linux 4.19.34
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=161fe6b7200000
kernel config: https://syzkaller.appspot.com/x/.config?x=c95a88291f095edd
dashboard link: https://syzkaller.appspot.com/bug?extid=e716aef347d472a5333a
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+e716ae...@syzkaller.appspotmail.com
cannot load conntrack support for proto=7
INFO: task syz-executor.1:11853 blocked for more than 140 seconds.
Not tainted 4.19.34 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28088 11853 7998 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x817/0x1d00 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1780
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common kernel/sched/completion.c:115 [inline]
wait_for_completion_timeout+0x2b9/0x480 kernel/sched/completion.c:155
usb_start_wait_urb+0x173/0x2f0 drivers/usb/core/message.c:62
usb_bulk_msg+0x229/0x550 drivers/usb/core/message.c:253
proc_bulk+0x488/0x820 drivers/usb/core/devio.c:1193
usbdev_do_ioctl+0x675/0x2f10 drivers/usb/core/devio.c:2419
usbdev_ioctl+0x26/0x30 drivers/usb/core/devio.c:2569
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458c29
Code: Bad RIP value.
RSP: 002b:00007fe410e47c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29
RDX: 0000000020000080 RSI: 00000000c0185502 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe410e486d4
R13: 00000000004c1161 R14: 00000000004d3758 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1035:
#0: 00000000aad2f7d6 (rcu_read_lock){....}, at:
debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438
1 lock held by rsyslogd/7833:
#0: 00000000297d673d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
fs/file.c:767
2 locks held by getty/7955:
#0: 00000000ccc88210 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 000000002d5f92ad (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7956:
#0: 000000007d035de6 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 0000000046123bb1 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7957:
#0: 00000000f33b2d1a (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000283af3fc (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7958:
#0: 000000000fbb36e3 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000a52ab78e (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7959:
#0: 00000000252005f5 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000002dc609 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7960:
#0: 0000000029984d2a (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000836be68b (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7961:
#0: 000000000716b2bc (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000da61119f (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1035 Comm: khungtaskd Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:202 [inline]
watchdog+0x9c6/0xec0 kernel/hung_task.c:263
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3598 Comm: udevd Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:190 [inline]
RIP: 0010:list_empty include/linux/list.h:203 [inline]
RIP: 0010:ep_send_events_proc+0x23f/0xc10 fs/eventpoll.c:1642
Code: ff e8 25 05 ae ff 8b b5 68 ff ff ff 4c 8b 85 60 ff ff ff 85 f6 0f 85
9f 04 00 00 e8 8b 03 ae ff 48 8b 85 70 ff ff ff 80 38 00 <0f> 85 c1 07 00
00 49 8b 07 49 39 c7 0f 84 39 04 00 00 e8 6a 03 ae
RSP: 0018:ffff8880960dfb10 EFLAGS: 00000246
RAX: ffffed1012c1bf8c RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81bd33b5 RDI: ffff8880960dfdc8
RBP: ffff8880960dfbe8 R08: ffff8880960d00c0 R09: ffff8880960d0960
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880960dfdc0 R14: ffff8880960dfdc0 R15: ffff8880960dfc60
FS: 00007f2fb98e77a0(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000458bff CR3: 000000009673a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
ep_scan_ready_list+0x308/0xb20 fs/eventpoll.c:708
ep_send_events fs/eventpoll.c:1713 [inline]
ep_poll+0x3b4/0xd10 fs/eventpoll.c:1840
do_epoll_wait+0x1b3/0x200 fs/eventpoll.c:2198
__do_sys_epoll_wait fs/eventpoll.c:2208 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2205 [inline]
__x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2205
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f2fb8ffb943
Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90
83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff
ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24
RSP: 002b:00007fff323f54f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f2fb8ffb943
RDX: 0000000000000008 RSI: 00007fff323f55f0 RDI: 000000000000000a
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000d33200 R15: 0000000000d1e030
---
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: 4d552acf Linux 4.19.34
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=161fe6b7200000
kernel config: https://syzkaller.appspot.com/x/.config?x=c95a88291f095edd
dashboard link: https://syzkaller.appspot.com/bug?extid=e716aef347d472a5333a
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+e716ae...@syzkaller.appspotmail.com
cannot load conntrack support for proto=7
INFO: task syz-executor.1:11853 blocked for more than 140 seconds.
Not tainted 4.19.34 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28088 11853 7998 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x817/0x1d00 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1780
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common kernel/sched/completion.c:115 [inline]
wait_for_completion_timeout+0x2b9/0x480 kernel/sched/completion.c:155
usb_start_wait_urb+0x173/0x2f0 drivers/usb/core/message.c:62
usb_bulk_msg+0x229/0x550 drivers/usb/core/message.c:253
proc_bulk+0x488/0x820 drivers/usb/core/devio.c:1193
usbdev_do_ioctl+0x675/0x2f10 drivers/usb/core/devio.c:2419
usbdev_ioctl+0x26/0x30 drivers/usb/core/devio.c:2569
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458c29
Code: Bad RIP value.
RSP: 002b:00007fe410e47c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29
RDX: 0000000020000080 RSI: 00000000c0185502 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe410e486d4
R13: 00000000004c1161 R14: 00000000004d3758 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1035:
#0: 00000000aad2f7d6 (rcu_read_lock){....}, at:
debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438
1 lock held by rsyslogd/7833:
#0: 00000000297d673d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
fs/file.c:767
2 locks held by getty/7955:
#0: 00000000ccc88210 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 000000002d5f92ad (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7956:
#0: 000000007d035de6 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 0000000046123bb1 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7957:
#0: 00000000f33b2d1a (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000283af3fc (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7958:
#0: 000000000fbb36e3 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000a52ab78e (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7959:
#0: 00000000252005f5 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000002dc609 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7960:
#0: 0000000029984d2a (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000836be68b (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7961:
#0: 000000000716b2bc (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000da61119f (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1035 Comm: khungtaskd Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:202 [inline]
watchdog+0x9c6/0xec0 kernel/hung_task.c:263
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3598 Comm: udevd Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:190 [inline]
RIP: 0010:list_empty include/linux/list.h:203 [inline]
RIP: 0010:ep_send_events_proc+0x23f/0xc10 fs/eventpoll.c:1642
Code: ff e8 25 05 ae ff 8b b5 68 ff ff ff 4c 8b 85 60 ff ff ff 85 f6 0f 85
9f 04 00 00 e8 8b 03 ae ff 48 8b 85 70 ff ff ff 80 38 00 <0f> 85 c1 07 00
00 49 8b 07 49 39 c7 0f 84 39 04 00 00 e8 6a 03 ae
RSP: 0018:ffff8880960dfb10 EFLAGS: 00000246
RAX: ffffed1012c1bf8c RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81bd33b5 RDI: ffff8880960dfdc8
RBP: ffff8880960dfbe8 R08: ffff8880960d00c0 R09: ffff8880960d0960
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880960dfdc0 R14: ffff8880960dfdc0 R15: ffff8880960dfc60
FS: 00007f2fb98e77a0(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000458bff CR3: 000000009673a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
ep_scan_ready_list+0x308/0xb20 fs/eventpoll.c:708
ep_send_events fs/eventpoll.c:1713 [inline]
ep_poll+0x3b4/0xd10 fs/eventpoll.c:1840
do_epoll_wait+0x1b3/0x200 fs/eventpoll.c:2198
__do_sys_epoll_wait fs/eventpoll.c:2208 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2205 [inline]
__x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2205
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f2fb8ffb943
Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90
83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff
ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24
RSP: 002b:00007fff323f54f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f2fb8ffb943
RDX: 0000000000000008 RSI: 00007fff323f55f0 RDI: 000000000000000a
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000d33200 R15: 0000000000d1e030
---
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
Aug 28, 2020, 11:25:22 AM8/28/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: f6d5cb9e Linux 4.19.142
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1148f669900000
kernel config: https://syzkaller.appspot.com/x/.config?x=30067df04d3254aa
dashboard link: https://syzkaller.appspot.com/bug?extid=e716aef347d472a5333a
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16afec99900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e716ae...@syzkaller.appspotmail.com
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
Bluetooth: hci0: command 0x0406 tx timeout
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
INFO: task syz-executor.0:6732 blocked for more than 140 seconds.
Not tainted 4.19.142-syzkaller #0
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1801
usb_start_wait_urb+0x14b/0x2b0 drivers/usb/core/message.c:62
usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:253
proc_bulk+0x3de/0x860 drivers/usb/core/devio.c:1206
usbdev_do_ioctl+0x696/0x3030 drivers/usb/core/devio.c:2430
usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2580
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007f61a46a0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000001a940 RCX: 000000000045d5b9
RDX: 0000000020000000 RSI: 00000000c0185502 RDI: 0000000000000003
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffc1b34b70f R14: 00007f61a46a19c0 R15: 000000000118cf4c
Showing all locks held in the system:
1 lock held by khungtaskd/1090:
#0: 000000000af0ed43 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440
1 lock held by in:imklog/6138:
#0: 0000000043012459 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1090 Comm: khungtaskd Not tainted 4.19.142-syzkaller #0
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
Code: 50 70 f7 2e 81 48 8d 14 03 c7 02 f1 f1 f1 f1 c7 42 04 00 f3 f3 f3 48 89 fa 65 48 8b 34 25 28 00 00 00 48 89 b4 24 98 00 00 00 <31> f6 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e be 0a 00 00
RSP: 0018:ffff888093497a08 EFLAGS: 00000a02
RAX: dffffc0000000000 RBX: 1ffff11012692f49 RCX: 0000000000000005
RDX: ffff888093497af0 RSI: add5711f3fd7f500 RDI: ffff888093497af0
RBP: ffff888093497b70 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000066061 R11: 0000000000000001 R12: ffff888093497b88
R13: 0000000000000000 R14: ffff8880aa00ab40 R15: ffff888093497af0
FS: 00007f414f2298c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
Call Trace:
__save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44
save_stack mm/kasan/kasan.c:448 [inline]
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553
slab_post_alloc_hook mm/slab.h:445 [inline]
slab_alloc mm/slab.c:3397 [inline]
kmem_cache_alloc+0x110/0x370 mm/slab.c:3557
getname_flags+0xce/0x590 fs/namei.c:140
do_sys_open+0x26c/0x520 fs/open.c:1079
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f414e7b9840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffe21b25378 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffe21b25680 RCX: 00007f414e7b9840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055619f84a880
RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000055619f83e060 R14: 00007ffe21b25640 R15: 000055619f84bfa0
HEAD commit: f6d5cb9e Linux 4.19.142
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1148f669900000
kernel config: https://syzkaller.appspot.com/x/.config?x=30067df04d3254aa
dashboard link: https://syzkaller.appspot.com/bug?extid=e716aef347d472a5333a
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16afec99900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e716ae...@syzkaller.appspotmail.com
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
Bluetooth: hci0: command 0x0406 tx timeout
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
INFO: task syz-executor.0:6732 blocked for more than 140 seconds.
Not tainted 4.19.142-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D27216 6732 6496 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1801
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common+0x29c/0x470 kernel/sched/completion.c:115
__wait_for_common kernel/sched/completion.c:104 [inline]
usb_start_wait_urb+0x14b/0x2b0 drivers/usb/core/message.c:62
usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:253
proc_bulk+0x3de/0x860 drivers/usb/core/devio.c:1206
usbdev_do_ioctl+0x696/0x3030 drivers/usb/core/devio.c:2430
usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2580
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
file_ioctl fs/ioctl.c:501 [inline]
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
__se_sys_ioctl fs/ioctl.c:710 [inline]
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007f61a46a0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000001a940 RCX: 000000000045d5b9
RDX: 0000000020000000 RSI: 00000000c0185502 RDI: 0000000000000003
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffc1b34b70f R14: 00007f61a46a19c0 R15: 000000000118cf4c
Showing all locks held in the system:
#0: 000000000af0ed43 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440
1 lock held by in:imklog/6138:
#0: 0000000043012459 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1090 Comm: khungtaskd Not tainted 4.19.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3708 Comm: systemd-journal Not tainted 4.19.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_next_frame+0x67/0x1c60 arch/x86/kernel/unwind_orc.c:404
Code: 50 70 f7 2e 81 48 8d 14 03 c7 02 f1 f1 f1 f1 c7 42 04 00 f3 f3 f3 48 89 fa 65 48 8b 34 25 28 00 00 00 48 89 b4 24 98 00 00 00 <31> f6 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e be 0a 00 00
RSP: 0018:ffff888093497a08 EFLAGS: 00000a02
RAX: dffffc0000000000 RBX: 1ffff11012692f49 RCX: 0000000000000005
RDX: ffff888093497af0 RSI: add5711f3fd7f500 RDI: ffff888093497af0
RBP: ffff888093497b70 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000066061 R11: 0000000000000001 R12: ffff888093497b88
R13: 0000000000000000 R14: ffff8880aa00ab40 R15: ffff888093497af0
FS: 00007f414f2298c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f414c5e04a0 CR3: 0000000093505000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44
save_stack mm/kasan/kasan.c:448 [inline]
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553
slab_post_alloc_hook mm/slab.h:445 [inline]
slab_alloc mm/slab.c:3397 [inline]
kmem_cache_alloc+0x110/0x370 mm/slab.c:3557
getname_flags+0xce/0x590 fs/namei.c:140
do_sys_open+0x26c/0x520 fs/open.c:1079
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f414e7b9840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffe21b25378 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffe21b25680 RCX: 00007f414e7b9840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055619f84a880
RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000055619f83e060 R14: 00007ffe21b25640 R15: 000055619f84bfa0
syzbot
Aug 28, 2020, 4:30:23 PM8/28/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: f6d5cb9e Linux 4.19.142
git tree: linux-4.19.y
HEAD commit: f6d5cb9e Linux 4.19.142
console output: https://syzkaller.appspot.com/x/log.txt?x=177bd7b6900000
kernel config: https://syzkaller.appspot.com/x/.config?x=30067df04d3254aa
dashboard link: https://syzkaller.appspot.com/bug?extid=e716aef347d472a5333a
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130f941e900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1249c885900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e716ae...@syzkaller.appspotmail.com
audit: type=1400 audit(1598646290.047:8): avc: denied { execmem } for pid=6466 comm="syz-executor462" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
INFO: task syz-executor462:6467 blocked for more than 140 seconds.
Not tainted 4.19.142-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor462 D27216 6467 6460 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1801
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1801
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common+0x29c/0x470 kernel/sched/completion.c:115
usb_start_wait_urb+0x14b/0x2b0 drivers/usb/core/message.c:62
usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:253
proc_bulk+0x3de/0x860 drivers/usb/core/devio.c:1206
usbdev_do_ioctl+0x696/0x3030 drivers/usb/core/devio.c:2430
usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2580
usb_start_wait_urb+0x14b/0x2b0 drivers/usb/core/message.c:62
usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:253
proc_bulk+0x3de/0x860 drivers/usb/core/devio.c:1206
usbdev_do_ioctl+0x696/0x3030 drivers/usb/core/devio.c:2430
usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2580
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
file_ioctl fs/ioctl.c:501 [inline]
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x449649
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Code: Bad RIP value.
RSP: 002b:00007f3602614db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000449649
RDX: 0000000020000000 RSI: 00000000c0185502 RDI: 0000000000000003
RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c
R13: 00007ffd438676bf R14: 00007f36026159c0 R15: 20c49ba5e353f7cf
Showing all locks held in the system:
#0: 00000000686d2974 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1090 Comm: khungtaskd Not tainted 4.19.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3702 Comm: systemd-journal Not tainted 4.19.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__ia32_sys_getpid+0x0/0x20 kernel/sys.c:890
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 0a 48 8b 7b 28 5b e9 42 fc ff ff e8 7d ee 5c 00 eb ef 90 66 2e 0f 1f 84 00 00 00 00 00 <e8> 8b cd 26 00 31 d2 be 01 00 00 00 65 48 8b 3c 25 40 ee 01 00 e8
RSP: 0018:ffff888094397f20 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000027 RCX: ffffffff810098b1
RDX: 1ffffffff0f008f7 RSI: ffffffff810098bf RDI: ffff888094397f58
RBP: ffff888094397f58 R08: 0000000000000000 R09: 0000000000000223
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000100
R13: ffffffff88d25b58 R14: 0000000000000000 R15: 0000000000000000
FS: 00007ff89f1278c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff89c4d1000 CR3: 0000000094245000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
Call Trace:
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff89e3c0f17
Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007ffcde686a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 0000557b0d871200 RCX: 00007ff89e3c0f17
RDX: 0000000000000000 RSI: 00007ffcde686b50 RDI: 0000557b0d871200
RBP: 00007ffcde686b50 R08: 8950659ed57cbdeb R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000e76
R13: 00007ffcde686af8 R14: 00007ffcde686b50 R15: 00007ffcde6870e8
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