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| Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|
| upstream | possible deadlock in bd_register_pending_holders block | 3 | 1149d | 1203d | 20/28 | fixed on 2021/11/10 00:50 | |||
| upstream | possible deadlock in bd_register_pending_holders (2) block | 4 | 1111d | 1128d | 0/28 | closed as dup on 2021/11/24 22:11 | |||
| linux-5.15 | possible deadlock in bd_register_pending_holders (2) | 17 | 16d | 255d | 0/3 | upstream: reported on 2024/04/15 01:52 |
======================================================
WARNING: possible circular locking dependency detected
5.15.133-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.4/24988 is trying to acquire lock:
ffff88801cbe2918 (&disk->open_mutex){+.+.}-{3:3}, at: bd_register_pending_holders+0x33/0x320 block/holder.c:161
but task is already holding lock:
ffffffff8ceeb468 (major_names_lock){+.+.}-{3:3}, at: blk_request_module+0x2f/0x1a0 block/genhd.c:681
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #8 (major_names_lock){+.+.}-{3:3}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
blk_request_module+0x2f/0x1a0 block/genhd.c:681
blkdev_get_no_open+0x39/0x190 block/bdev.c:740
blkdev_get_by_dev+0x89/0xa50 block/bdev.c:804
swsusp_check+0xb1/0x2c0 kernel/power/swap.c:1526
software_resume+0xc6/0x3c0 kernel/power/hibernate.c:977
resume_store+0xe3/0x130 kernel/power/hibernate.c:1179
kernfs_fop_write_iter+0x3a2/0x4f0 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:2103 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacf/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
-> #7 (system_transition_mutex/1){+.+.}-{3:3}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
software_resume+0x7c/0x3c0 kernel/power/hibernate.c:932
resume_store+0xe3/0x130 kernel/power/hibernate.c:1179
kernfs_fop_write_iter+0x3a2/0x4f0 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:2103 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacf/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
-> #6 (&of->mutex){+.+.}-{3:3}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
kernfs_seq_start+0x50/0x3b0 fs/kernfs/file.c:112
seq_read_iter+0x3d0/0xd10 fs/seq_file.c:225
call_read_iter include/linux/fs.h:2097 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa9f/0xe10 fs/read_write.c:485
ksys_read+0x1a2/0x2c0 fs/read_write.c:623
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
-> #5 (&p->lock){+.+.}-{3:3}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
seq_read_iter+0xae/0xd10 fs/seq_file.c:182
proc_reg_read_iter+0x1b7/0x280 fs/proc/inode.c:300
call_read_iter include/linux/fs.h:2097 [inline]
generic_file_splice_read+0x4ad/0x790 fs/splice.c:311
do_splice_to fs/splice.c:796 [inline]
splice_direct_to_actor+0x448/0xc10 fs/splice.c:870
do_splice_direct+0x285/0x3d0 fs/splice.c:979
do_sendfile+0x625/0xff0 fs/read_write.c:1249
__do_sys_sendfile64 fs/read_write.c:1317 [inline]
__se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
-> #4 (sb_writers#3){.+.+}-{0:0}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
__sb_start_write include/linux/fs.h:1742 [inline]
sb_start_write include/linux/fs.h:1812 [inline]
file_start_write include/linux/fs.h:2966 [inline]
lo_write_bvec+0x1a3/0x740 drivers/block/loop.c:315
lo_write_simple drivers/block/loop.c:338 [inline]
do_req_filebacked drivers/block/loop.c:656 [inline]
loop_handle_cmd drivers/block/loop.c:2234 [inline]
loop_process_work+0x2309/0x2af0 drivers/block/loop.c:2274
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
-> #3 ((work_completion)(&worker->work)){+.+.}-{0:0}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
process_one_work+0x7f1/0x10c0 kernel/workqueue.c:2286
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
-> #2 ((wq_completion)loop5){+.+.}-{0:0}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
flush_workqueue+0x170/0x1610 kernel/workqueue.c:2830
drain_workqueue+0xc5/0x390 kernel/workqueue.c:2995
destroy_workqueue+0x7b/0xae0 kernel/workqueue.c:4430
__loop_clr_fd+0x241/0xbe0 drivers/block/loop.c:1383
blkdev_put_whole block/bdev.c:692 [inline]
blkdev_put+0x455/0x790 block/bdev.c:954
btrfs_close_bdev fs/btrfs/volumes.c:1153 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1174 [inline]
close_fs_devices+0x45e/0x8e0 fs/btrfs/volumes.c:1217
btrfs_close_devices+0xc4/0x5c0 fs/btrfs/volumes.c:1232
close_ctree+0x731/0x886 fs/btrfs/disk-io.c:4506
generic_shutdown_super+0x136/0x2c0 fs/super.c:475
kill_anon_super+0x37/0x60 fs/super.c:1076
btrfs_kill_super+0x3d/0x50 fs/btrfs/super.c:2391
deactivate_locked_super+0xa0/0x110 fs/super.c:335
cleanup_mnt+0x44e/0x500 fs/namespace.c:1143
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
-> #1 (&lo->lo_mutex){+.+.}-{3:3}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_killable_nested+0x17/0x20 kernel/locking/mutex.c:758
lo_open+0x68/0x100 drivers/block/loop.c:2055
blkdev_get_whole+0x94/0x390 block/bdev.c:669
blkdev_get_by_dev+0x2bc/0xa50 block/bdev.c:824
blkdev_open+0x138/0x2d0 block/fops.c:463
do_dentry_open+0x807/0xfb0 fs/open.c:826
do_open fs/namei.c:3538 [inline]
path_openat+0x2702/0x2f20 fs/namei.c:3672
do_filp_open+0x21c/0x460 fs/namei.c:3699
do_sys_openat2+0x13b/0x500 fs/open.c:1211
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
-> #0 (&disk->open_mutex){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
bd_register_pending_holders+0x33/0x320 block/holder.c:161
device_add_disk+0x526/0xc50 block/genhd.c:484
add_disk include/linux/genhd.h:203 [inline]
brd_alloc+0x4e6/0x720 drivers/block/brd.c:425
blk_request_module+0x181/0x1a0 block/genhd.c:684
blkdev_get_no_open+0x39/0x190 block/bdev.c:740
blkdev_get_by_dev+0x89/0xa50 block/bdev.c:804
swsusp_check+0xb1/0x2c0 kernel/power/swap.c:1526
software_resume+0xc6/0x3c0 kernel/power/hibernate.c:977
resume_store+0xe3/0x130 kernel/power/hibernate.c:1179
kernfs_fop_write_iter+0x3a2/0x4f0 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:2103 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacf/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
other info that might help us debug this:
Chain exists of:
&disk->open_mutex --> system_transition_mutex/1 --> major_names_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(major_names_lock);
lock(system_transition_mutex/1);
lock(major_names_lock);
lock(&disk->open_mutex);
*** DEADLOCK ***
6 locks held by syz-executor.4/24988:
#0: ffff88808203eff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2cb/0x380 fs/file.c:1088
#1: ffff88807f4f6460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x29a/0xe50 fs/read_write.c:590
#2: ffff888075d9c888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1e7/0x4f0 fs/kernfs/file.c:287
#3: ffff8881407bfbd0 (kn->active#748){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20b/0x4f0 fs/kernfs/file.c:288
#4: ffffffff8c7d7bc8 (system_transition_mutex/1){+.+.}-{3:3}, at: software_resume+0x7c/0x3c0 kernel/power/hibernate.c:932
#5: ffffffff8ceeb468 (major_names_lock){+.+.}-{3:3}, at: blk_request_module+0x2f/0x1a0 block/genhd.c:681
stack backtrace:
CPU: 0 PID: 24988 Comm: syz-executor.4 Not tainted 5.15.133-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
bd_register_pending_holders+0x33/0x320 block/holder.c:161
device_add_disk+0x526/0xc50 block/genhd.c:484
add_disk include/linux/genhd.h:203 [inline]
brd_alloc+0x4e6/0x720 drivers/block/brd.c:425
blk_request_module+0x181/0x1a0 block/genhd.c:684
blkdev_get_no_open+0x39/0x190 block/bdev.c:740
blkdev_get_by_dev+0x89/0xa50 block/bdev.c:804
swsusp_check+0xb1/0x2c0 kernel/power/swap.c:1526
software_resume+0xc6/0x3c0 kernel/power/hibernate.c:977
resume_store+0xe3/0x130 kernel/power/hibernate.c:1179
kernfs_fop_write_iter+0x3a2/0x4f0 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:2103 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacf/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7feda0e81ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fed9f4030c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007feda0fa0f80 RCX: 00007feda0e81ae9
RDX: 0000000000000012 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00007feda0ecd47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007feda0fa0f80 R15: 00007fff57980778
</TASK>
PM: Image not found (code -22)
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023/10/04 20:02 | linux-5.15.y | b911329317b4 | b7d7ff54 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in bd_register_pending_holders | ||
| 2023/06/29 16:59 | linux-5.15.y | 4af60700a60c | 134ddc02 | .config | console log | report | info | ci2-linux-5-15-kasan | possible deadlock in bd_register_pending_holders | |||
| 2023/05/26 14:19 | linux-5.15.y | 1fe619a7d252 | b40ef614 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in bd_register_pending_holders |