======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc1-syzkaller-00235-g9946eaf552b1 #0 Not tainted
------------------------------------------------------
syz.1.2288/14056 is trying to acquire lock:
ffff88802913b468 (&pipe->mutex){+.+.}-{4:4}, at: pipe_write+0x166/0x1b30 fs/pipe.c:456
but task is already holding lock:
ffff88807b93b140 (&sbi->pipe_mutex){+.+.}-{4:4}, at: autofs_write fs/autofs/waitq.c:55 [inline]
ffff88807b93b140 (&sbi->pipe_mutex){+.+.}-{4:4}, at: autofs_notify_daemon+0x499/0xd50 fs/autofs/waitq.c:164
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&sbi->pipe_mutex){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xb10 kernel/locking/mutex.c:730
autofs_write fs/autofs/waitq.c:55 [inline]
autofs_notify_daemon+0x499/0xd50 fs/autofs/waitq.c:164
autofs_wait+0x10b5/0x1a30 fs/autofs/waitq.c:426
autofs_mount_wait+0x132/0x380 fs/autofs/root.c:255
autofs_d_automount+0x390/0x7f0 fs/autofs/root.c:401
follow_automount fs/namei.c:1454 [inline]
__traverse_mounts+0x192/0x760 fs/namei.c:1499
traverse_mounts fs/namei.c:1528 [inline]
handle_mounts fs/namei.c:1631 [inline]
step_into+0x593/0x2220 fs/namei.c:1952
walk_component+0xfc/0x5b0 fs/namei.c:2120
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2636
filename_lookup+0x221/0x5f0 fs/namei.c:2665
kern_path+0x35/0x50 fs/namei.c:2773
lookup_bdev+0xd9/0x280 block/bdev.c:1163
resume_store+0x1d8/0x460 kernel/power/hibernate.c:1247
kobj_attr_store+0x55/0x80 lib/kobject.c:840
sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:139
kernfs_fop_write_iter+0x33d/0x500 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x5ae/0x1150 fs/read_write.c:679
ksys_write+0x12b/0x250 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&of->mutex){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xb10 kernel/locking/mutex.c:730
kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
iter_file_splice_write+0x90f/0x10b0 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
do_splice+0x146a/0x1f70 fs/splice.c:1354
__do_splice+0x327/0x360 fs/splice.c:1436
__do_sys_splice fs/splice.c:1639 [inline]
__se_sys_splice fs/splice.c:1621 [inline]
__x64_sys_splice+0x187/0x250 fs/splice.c:1621
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&pipe->mutex){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain kernel/locking/lockdep.c:3906 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5228
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xb10 kernel/locking/mutex.c:730
pipe_write+0x166/0x1b30 fs/pipe.c:456
__kernel_write_iter+0x71f/0xa90 fs/read_write.c:612
__kernel_write+0xf6/0x140 fs/read_write.c:632
autofs_write fs/autofs/waitq.c:57 [inline]
autofs_notify_daemon+0x4ce/0xd50 fs/autofs/waitq.c:164
autofs_wait+0x10b5/0x1a30 fs/autofs/waitq.c:426
autofs_mount_wait+0x132/0x380 fs/autofs/root.c:255
autofs_d_automount+0x390/0x7f0 fs/autofs/root.c:401
follow_automount fs/namei.c:1454 [inline]
__traverse_mounts+0x192/0x760 fs/namei.c:1499
traverse_mounts fs/namei.c:1528 [inline]
handle_mounts fs/namei.c:1631 [inline]
step_into+0x593/0x2220 fs/namei.c:1952
walk_component+0xfc/0x5b0 fs/namei.c:2120
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2636
filename_lookup+0x221/0x5f0 fs/namei.c:2665
kern_path+0x35/0x50 fs/namei.c:2773
lookup_bdev+0xd9/0x280 block/bdev.c:1163
resume_store+0x1d8/0x460 kernel/power/hibernate.c:1247
kobj_attr_store+0x55/0x80 lib/kobject.c:840
sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:139
kernfs_fop_write_iter+0x33d/0x500 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x5ae/0x1150 fs/read_write.c:679
ksys_write+0x12b/0x250 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&pipe->mutex --> &of->mutex --> &sbi->pipe_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sbi->pipe_mutex);
lock(&of->mutex);
lock(&sbi->pipe_mutex);
lock(&pipe->mutex);
*** DEADLOCK ***
5 locks held by syz.1.2288/14056:
#0: ffff88801ce92d38 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1192
#1: ffff888024966420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
#2: ffff88802887e088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
#3: ffff888140aca788 (kn->active#66){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
#4: ffff88807b93b140 (&sbi->pipe_mutex){+.+.}-{4:4}, at: autofs_write fs/autofs/waitq.c:55 [inline]
#4: ffff88807b93b140 (&sbi->pipe_mutex){+.+.}-{4:4}, at: autofs_notify_daemon+0x499/0xd50 fs/autofs/waitq.c:164
stack backtrace:
CPU: 0 UID: 0 PID: 14056 Comm: syz.1.2288 Not tainted 6.14.0-rc1-syzkaller-00235-g9946eaf552b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x490/0x760 kernel/locking/lockdep.c:2076
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2208
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain kernel/locking/lockdep.c:3906 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5228
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xb10 kernel/locking/mutex.c:730
pipe_write+0x166/0x1b30 fs/pipe.c:456
__kernel_write_iter+0x71f/0xa90 fs/read_write.c:612
__kernel_write+0xf6/0x140 fs/read_write.c:632
autofs_write fs/autofs/waitq.c:57 [inline]
autofs_notify_daemon+0x4ce/0xd50 fs/autofs/waitq.c:164
autofs_wait+0x10b5/0x1a30 fs/autofs/waitq.c:426
autofs_mount_wait+0x132/0x380 fs/autofs/root.c:255
autofs_d_automount+0x390/0x7f0 fs/autofs/root.c:401
follow_automount fs/namei.c:1454 [inline]
__traverse_mounts+0x192/0x760 fs/namei.c:1499
traverse_mounts fs/namei.c:1528 [inline]
handle_mounts fs/namei.c:1631 [inline]
step_into+0x593/0x2220 fs/namei.c:1952
walk_component+0xfc/0x5b0 fs/namei.c:2120
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2636
filename_lookup+0x221/0x5f0 fs/namei.c:2665
kern_path+0x35/0x50 fs/namei.c:2773
lookup_bdev+0xd9/0x280 block/bdev.c:1163
resume_store+0x1d8/0x460 kernel/power/hibernate.c:1247
kobj_attr_store+0x55/0x80 lib/kobject.c:840
sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:139
kernfs_fop_write_iter+0x33d/0x500 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x5ae/0x1150 fs/read_write.c:679
ksys_write+0x12b/0x250 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff76658cde9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff76737c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff7667a5fa0 RCX: 00007ff76658cde9
RDX: 0000000000000012 RSI: 0000400000000040 RDI: 0000000000000003
RBP: 00007ff76660e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff7667a5fa0 R15: 00007ffc4d5e4c08
</TASK>
block device autoloading is deprecated and will be removed.
PM: Image not found (code -22)