Hello,
syzbot found the following issue on:
HEAD commit: d7e78d08 Linux 4.14.195
git tree: linux-4.14.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=13701056900000
kernel config:
https://syzkaller.appspot.com/x/.config?x=6608b656f49b4e8c
dashboard link:
https://syzkaller.appspot.com/bug?extid=1f4ecbe714743132417a
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro:
https://syzkaller.appspot.com/x/repro.syz?x=12a82af2900000
C reproducer:
https://syzkaller.appspot.com/x/repro.c?x=17d6df49900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+1f4ecb...@syzkaller.appspotmail.com
hfsplus: unable to find HFS+ superblock
hfsplus: unable to find HFS+ superblock
hfsplus: unable to find HFS+ superblock
hfsplus: unable to find HFS+ superblock
INFO: task systemd-udevd:6409 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
systemd-udevd D28336 6409 3653 0x00000104
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
hfsplus: unable to find HFS+ superblock
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
blkdev_put+0x27/0x4c0 fs/block_dev.c:1816
blkdev_close+0x86/0xb0 fs/block_dev.c:1865
__fput+0x25f/0x7a0 fs/file_table.c:210
task_work_run+0x11f/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fad7b478270
RSP: 002b:00007fff7f51ce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fad7b478270
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007fad7c331710 R08: 000055d7ec4dcdc0 R09: 000055d7ec4dcb00
R10: 00007fad7c3318c0 R11: 0000000000000246 R12: 0000000000000000
R13: 000055d7ec4dacf0 R14: 0000000000000003 R15: 000000000000000e
INFO: task systemd-udevd:6410 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
systemd-udevd D28064 6410 3653 0x00000104
Call Trace:
hfsplus: unable to find HFS+ superblock
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
__blkdev_get+0x191/0x1090 fs/block_dev.c:1455
blkdev_get+0x88/0x890 fs/block_dev.c:1611
blkdev_open+0x1cc/0x250 fs/block_dev.c:1772
do_dentry_open+0x44b/0xec0 fs/open.c:777
vfs_open+0x105/0x220 fs/open.c:888
do_last fs/namei.c:3428 [inline]
path_openat+0x628/0x2970 fs/namei.c:3569
do_filp_open+0x179/0x3c0 fs/namei.c:3603
do_sys_open+0x296/0x410 fs/open.c:1081
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fad7b478840
hfsplus: unable to find HFS+ superblock
RSP: 002b:00007fff7f51d428 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055d7ec4de800 RCX: 00007fad7b478840
RDX: 000055d7ec209fe3 RSI: 00000000000a0800 RDI: 000055d7ec4cc9c0
RBP: 00007fff7f51d5a0 R08: 000055d7ec209670 R09: 0000000000000010
R10: 000055d7ec209d0c R11: 0000000000000246 R12: 00007fff7f51d4f0
R13: 000055d7ec4df150 R14: 0000000000000003 R15: 000000000000000e
INFO: task systemd-udevd:6421 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
systemd-udevd D28416 6421 3653 0x00000104
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
hfsplus: unable to find HFS+ superblock
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
__blkdev_get+0x191/0x1090 fs/block_dev.c:1455
blkdev_get+0x88/0x890 fs/block_dev.c:1611
blkdev_open+0x1cc/0x250 fs/block_dev.c:1772
do_dentry_open+0x44b/0xec0 fs/open.c:777
vfs_open+0x105/0x220 fs/open.c:888
do_last fs/namei.c:3428 [inline]
path_openat+0x628/0x2970 fs/namei.c:3569
do_filp_open+0x179/0x3c0 fs/namei.c:3603
do_sys_open+0x296/0x410 fs/open.c:1081
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fad7b478840
RSP: 002b:00007fff7f51ce38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055d7ec4df3b0 RCX: 00007fad7b478840
RDX: 000055d7ec209fe3 RSI: 00000000000a0800 RDI: 000055d7ec4db030
RBP: 00007fff7f51cfb0 R08: 000055d7ec209670 R09: 0000000000000010
R10: 000055d7ec209d0c R11: 0000000000000246 R12: 00007fff7f51cf00
R13: 000055d7ec4e07f0 R14: 0000000000000003 R15: 000000000000000e
INFO: task systemd-udevd:6445 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
hfsplus: unable to find HFS+ superblock
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
systemd-udevd D27784 6445 3653 0x00000104
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
__blkdev_get+0x191/0x1090 fs/block_dev.c:1455
blkdev_get+0x88/0x890 fs/block_dev.c:1611
blkdev_open+0x1cc/0x250 fs/block_dev.c:1772
do_dentry_open+0x44b/0xec0 fs/open.c:777
vfs_open+0x105/0x220 fs/open.c:888
do_last fs/namei.c:3428 [inline]
path_openat+0x628/0x2970 fs/namei.c:3569
do_filp_open+0x179/0x3c0 fs/namei.c:3603
do_sys_open+0x296/0x410 fs/open.c:1081
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fad7b478840
RSP: 002b:00007fff7f51ce38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055d7ec4db030 RCX: 00007fad7b478840
RDX: 000055d7ec209fe3 RSI: 00000000000a0800 RDI: 000055d7ec4daf80
hfsplus: unable to find HFS+ superblock
RBP: 00007fff7f51cfb0 R08: 000055d7ec209670 R09: 0000000000000010
R10: 000055d7ec209d0c R11: 0000000000000246 R12: 00007fff7f51cf00
R13: 000055d7ec4e07f0 R14: 0000000000000003 R15: 000000000000000e
INFO: task systemd-udevd:6447 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
systemd-udevd D27576 6447 3653 0x00000104
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
__blkdev_get+0x191/0x1090 fs/block_dev.c:1455
blkdev_get+0x88/0x890 fs/block_dev.c:1611
blkdev_open+0x1cc/0x250 fs/block_dev.c:1772
do_dentry_open+0x44b/0xec0 fs/open.c:777
vfs_open+0x105/0x220 fs/open.c:888
hfsplus: unable to find HFS+ superblock
do_last fs/namei.c:3428 [inline]
path_openat+0x628/0x2970 fs/namei.c:3569
do_filp_open+0x179/0x3c0 fs/namei.c:3603
do_sys_open+0x296/0x410 fs/open.c:1081
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fad7b478840
RSP: 002b:00007fff7f518008 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055d7ec4e0e20 RCX: 00007fad7b478840
RDX: 000055d7ec209fe3 RSI: 0000000000080000 RDI: 000055d7ec4dae00
RBP: 0000000000000001 R08: 000055d7ec209670 R09: 0000000000000110
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
hfsplus: unable to find HFS+ superblock
R13: 0000000000000000 R14: 000055d7ec4e07f0 R15: 00000000ffffffff
INFO: task syz-executor456:6767 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor456 D28592 6767 6376 0x80000004
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x540/0x1830 block/ioctl.c:594
ioctl_by_bdev+0xa0/0x110 fs/block_dev.c:2068
hfsplus_get_last_session fs/hfsplus/wrapper.c:151 [inline]
hfsplus_read_wrapper+0x1a7/0xd68 fs/hfsplus/wrapper.c:173
hfsplus_fill_super+0x331/0x1850 fs/hfsplus/super.c:413
hfsplus: unable to find HFS+ superblock
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x446bd9
RSP: 002b:00007f529a28ddb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446bd9
RDX: 0000000020000180 RSI: 00000000200001c0 RDI: 0000000020000240
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007fff3226a74f R14: 00007f529a28e9c0 R15: 000000000000002d
INFO: task syz-executor456:6769 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor456 D28960 6769 6376 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
hfsplus: unable to find HFS+ superblock
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x1e6/0x350 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:66 [inline]
down_read+0x44/0x80 kernel/locking/rwsem.c:26
__get_super.part.0+0x271/0x390 fs/super.c:678
__get_super include/linux/spinlock.h:317 [inline]
get_super+0x2b/0x50 fs/super.c:707
fsync_bdev+0x14/0xc0 fs/block_dev.c:495
invalidate_partition+0x74/0xb0 block/genhd.c:1506
drop_partitions.isra.0+0x83/0x150 block/partition-generic.c:442
rescan_partitions+0xa9/0x800 block/partition-generic.c:515
__blkdev_reread_part+0x140/0x1d0 block/ioctl.c:173
blkdev_reread_part+0x23/0x40 block/ioctl.c:193
loop_reread_partitions drivers/block/loop.c:624 [inline]
loop_set_status+0xeeb/0x12b0 drivers/block/loop.c:1193
loop_set_status64+0x92/0xe0 drivers/block/loop.c:1311
lo_ioctl+0x587/0x1cd0 drivers/block/loop.c:1441
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x540/0x1830 block/ioctl.c:594
block_ioctl+0xd9/0x120 fs/block_dev.c:1883
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x446ae7
RSP: 002b:00007f529a26cb68 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000446ae7
RDX: 00007f529a26cc00 RSI: 0000000000004c04 RDI: 0000000000000004
RBP: 0000000000000003 R08: 000000000000000a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000006dbc3c
R13: 00007f529a26d6d0 R14: 00007f529a26d9c0 R15: 000000000000002d
print_req_error: 41 callbacks suppressed
print_req_error: I/O error, dev loop5, sector 2
INFO: task syz-executor456:7302 blocked for more than 140 seconds.
hfsplus: unable to find HFS+ superblock
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor456 D28808 7302 6373 0x80000004
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x540/0x1830 block/ioctl.c:594
print_req_error: I/O error, dev loop5, sector 2
hfsplus: unable to find HFS+ superblock
ioctl_by_bdev+0xa0/0x110 fs/block_dev.c:2068
hfsplus_get_last_session fs/hfsplus/wrapper.c:151 [inline]
hfsplus_read_wrapper+0x1a7/0xd68 fs/hfsplus/wrapper.c:173
hfsplus_fill_super+0x331/0x1850 fs/hfsplus/super.c:413
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
print_req_error: I/O error, dev loop5, sector 2
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
hfsplus: unable to find HFS+ superblock
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x446bd9
RSP: 002b:00007f529a28ddb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446bd9
RDX: 0000000020000180 RSI: 00000000200001c0 RDI: 0000000020000240
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007fff3226a74f R14: 00007f529a28e9c0 R15: 000000000000002d
INFO: task syz-executor456:7310 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor456 D29264 7310 6373 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x1e6/0x350 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:66 [inline]
down_read+0x44/0x80 kernel/locking/rwsem.c:26
__get_super.part.0+0x271/0x390 fs/super.c:678
__get_super include/linux/spinlock.h:317 [inline]
get_super+0x2b/0x50 fs/super.c:707
print_req_error: I/O error, dev loop5, sector 2
fsync_bdev+0x14/0xc0 fs/block_dev.c:495
hfsplus: unable to find HFS+ superblock
invalidate_partition+0x74/0xb0 block/genhd.c:1506
drop_partitions.isra.0+0x83/0x150 block/partition-generic.c:442
rescan_partitions+0xa9/0x800 block/partition-generic.c:515
__blkdev_reread_part+0x140/0x1d0 block/ioctl.c:173
blkdev_reread_part+0x23/0x40 block/ioctl.c:193
loop_reread_partitions drivers/block/loop.c:624 [inline]
loop_set_status+0xeeb/0x12b0 drivers/block/loop.c:1193
loop_set_status64+0x92/0xe0 drivers/block/loop.c:1311
lo_ioctl+0x587/0x1cd0 drivers/block/loop.c:1441
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x540/0x1830 block/ioctl.c:594
block_ioctl+0xd9/0x120 fs/block_dev.c:1883
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x446ae7
RSP: 002b:00007f529a26cb68 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000446ae7
RDX: 00007f529a26cc00 RSI: 0000000000004c04 RDI: 0000000000000004
RBP: 0000000000000003 R08: 000000000000000a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000006dbc3c
R13: 00007f529a26d6d0 R14: 00007f529a26d9c0 R15: 000000000000002d
INFO: task syz-executor456:9861 blocked for more than 140 seconds.
Not tainted 4.14.195-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
print_req_error: I/O error, dev loop5, sector 2
syz-executor456 D28808 9861 6374 0x80000004
hfsplus: unable to find HFS+ superblock
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x540/0x1830 block/ioctl.c:594
print_req_error: I/O error, dev loop5, sector 2
ioctl_by_bdev+0xa0/0x110 fs/block_dev.c:2068
hfsplus: unable to find HFS+ superblock
hfsplus_get_last_session fs/hfsplus/wrapper.c:151 [inline]
hfsplus_read_wrapper+0x1a7/0xd68 fs/hfsplus/wrapper.c:173
hfsplus_fill_super+0x331/0x1850 fs/hfsplus/super.c:413
mount_bdev+0x2b3/0x360 fs/super.c:1134
print_req_error: I/O error, dev loop5, sector 2
mount_fs+0x92/0x2a0 fs/super.c:1237
hfsplus: unable to find HFS+ superblock
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x446bd9
RSP: 002b:00007f529a28ddb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446bd9
RDX: 0000000020000180 RSI: 00000000200001c0 RDI: 0000000020000240
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007fff3226a74f R14: 00007f529a28e9c0 R15: 000000000000002d
Showing all locks held in the system:
print_req_error: I/O error, dev loop5, sector 2
1 lock held by khungtaskd/1068:
hfsplus: unable to find HFS+ superblock
#0: (tasklist_lock){.+.+}, at: [<ffffffff814777f4>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
1 lock held by in:imklog/6018:
#0: (&f->f_pos_lock){+.+.}, at: [<ffffffff8193b49b>] __fdget_pos+0x1fb/0x2b0 fs/file.c:769
1 lock held by systemd-udevd/6409:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a44b7>] blkdev_put+0x27/0x4c0 fs/block_dev.c:1816
1 lock held by systemd-udevd/6410:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a59f1>] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455
1 lock held by systemd-udevd/6421:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a59f1>] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455
1 lock held by systemd-udevd/6445:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a59f1>] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455
1 lock held by systemd-udevd/6447:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a59f1>] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455
2 locks held by syz-executor456/6767:
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] alloc_super fs/super.c:251 [inline]
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] sget_userns+0x556/0xc10 fs/super.c:516
#1: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
3 locks held by syz-executor456/6769:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
#1: (&bdev->bd_mutex){+.+.}, at: [<ffffffff82f734cb>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
#2: (&type->s_umount_key#57){.+.+}, at: [<ffffffff818dcf41>] __get_super.part.0+0x271/0x390 fs/super.c:678
2 locks held by syz-executor456/7302:
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] alloc_super fs/super.c:251 [inline]
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] sget_userns+0x556/0xc10 fs/super.c:516
#1: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
3 locks held by syz-executor456/7310:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
#1: (&bdev->bd_mutex){+.+.}, at: [<ffffffff82f734cb>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
#2: (&type->s_umount_key#57){.+.+}, at: [<ffffffff818dcf41>] __get_super.part.0+0x271/0x390 fs/super.c:678
2 locks held by syz-executor456/9861:
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] alloc_super fs/super.c:251 [inline]
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] sget_userns+0x556/0xc10 fs/super.c:516
#1: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
3 locks held by syz-executor456/9864:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
#1: (&bdev->bd_mutex){+.+.}, at: [<ffffffff82f734cb>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
#2: (&type->s_umount_key#57){.+.+}, at: [<ffffffff818dcf41>] __get_super.part.0+0x271/0x390 fs/super.c:678
2 locks held by syz-executor456/11182:
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] alloc_super fs/super.c:251 [inline]
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] sget_userns+0x556/0xc10 fs/super.c:516
#1: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
3 locks held by syz-executor456/11186:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
#1: (&bdev->bd_mutex){+.+.}, at: [<ffffffff82f734cb>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
#2: (&type->s_umount_key#57){.+.+}, at: [<ffffffff818dcf41>] __get_super.part.0+0x271/0x390 fs/super.c:678
2 locks held by syz-executor456/14524:
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] alloc_super fs/super.c:251 [inline]
#0: (&type->s_umount_key#56/1){+.+.}, at: [<ffffffff818db6a6>] sget_userns+0x556/0xc10 fs/super.c:516
#1: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
3 locks held by syz-executor456/14526:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff83a832a7>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414
#1: (&bdev->bd_mutex){+.+.}, at: [<ffffffff82f734cb>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
#2: (&type->s_umount_key#57){.+.+}, at: [<ffffffff818dcf41>] __get_super.part.0+0x271/0x390 fs/super.c:678
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1068 Comm: khungtaskd Not tainted 4.14.195-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5b9/0xb40 kernel/hung_task.c:274
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff86547e8e
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches