INFO: task kworker/1:4:4233 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4 state:D stack:24072 pid: 4233 ppid: 2 flags:0x00004000
Workqueue: events_long flush_old_commits
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xc71/0x2390 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
reiserfs_sync_fs fs/reiserfs/super.c:76 [inline]
flush_old_commits+0x1de/0x2f0 fs/reiserfs/super.c:111
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
INFO: task syz.0.16:5256 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.16 state:D stack:27304 pid: 5256 ppid: 4963 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
io_schedule+0x7c/0xd0 kernel/sched/core.c:8503
wait_on_page_bit_common+0x815/0xe00 mm/filemap.c:1356
__lock_page mm/filemap.c:1648 [inline]
lock_page include/linux/pagemap.h:625 [inline]
pagecache_get_page+0x4d4/0xef0 mm/filemap.c:1910
find_or_create_page include/linux/pagemap.h:420 [inline]
grab_cache_page include/linux/pagemap.h:502 [inline]
grab_tail_page fs/reiserfs/inode.c:2209 [inline]
reiserfs_truncate_file+0x1fa/0xdc0 fs/reiserfs/inode.c:2277
reiserfs_file_release+0x8e0/0xa50 fs/reiserfs/file.c:109
__fput+0x234/0x930 fs/file_table.c:311
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb43579d969
RSP: 002b:00007ffd88fc4d98 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fb4359c6ba0 RCX: 00007fb43579d969
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fb4359c6ba0 R08: 0000000000000000 R09: 0000000588fc508f
R10: 00007fb4359c6ac0 R11: 0000000000000246 R12: 00000000000198dc
R13: 00007ffd88fc4e90 R14: ffffffffffffffff R15: 00007ffd88fc4eb0
INFO: task syz.0.16:5279 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.16 state:D stack:25536 pid: 5279 ppid: 4963 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xc71/0x2390 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:815 [inline]
lock_journal fs/reiserfs/journal.c:534 [inline]
do_journal_end+0x30e/0x42d0 fs/reiserfs/journal.c:4025
reiserfs_end_persistent_transaction+0x68/0x170 fs/reiserfs/journal.c:3183
reiserfs_write_end+0x424/0xa40 fs/reiserfs/inode.c:2964
generic_cont_expand_simple+0x120/0x190 fs/buffer.c:2367
reiserfs_setattr+0x42f/0x1010 fs/reiserfs/inode.c:3319
notify_change+0xbcd/0xee0 fs/attr.c:505
do_truncate+0x197/0x220 fs/open.c:65
vfs_truncate+0x262/0x2f0 fs/open.c:111
do_sys_truncate+0xdc/0x190 fs/open.c:134
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb43579d969
RSP: 002b:00007fb4349ec038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007fb4359c5080 RCX: 00007fb43579d969
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000200000000000
RBP: 00007fb43581fab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fb4359c5080 R15: 00007ffd88fc4c38
INFO: task kworker/u4:8:5321 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:8 state:D stack:24648 pid: 5321 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
io_schedule+0x7c/0xd0 kernel/sched/core.c:8503
wait_on_page_bit_common+0x815/0xe00 mm/filemap.c:1356
lock_page include/linux/pagemap.h:625 [inline]
write_cache_pages+0x41d/0xfa0 mm/page-writeback.c:2244
generic_writepages mm/page-writeback.c:2368 [inline]
do_writepages+0x4fa/0x6d0 mm/page-writeback.c:2388
__writeback_single_inode+0x153/0xda0 fs/fs-writeback.c:1647
writeback_sb_inodes+0x9fe/0x1610 fs/fs-writeback.c:1930
__writeback_inodes_wb+0x12a/0x3f0 fs/fs-writeback.c:2001
wb_writeback+0x455/0xb90 fs/fs-writeback.c:2106
wb_check_background_flush fs/fs-writeback.c:2172 [inline]
wb_do_writeback fs/fs-writeback.c:2260 [inline]
wb_workfn+0xb47/0xe60 fs/fs-writeback.c:2288
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Showing all locks held in the system:
4 locks held by kworker/1:1/23:
#0: ffff888016871138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc90000ddfd00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888074e020e0 (&type->s_umount_key#53){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff8881465b2090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
1 lock held by khungtaskd/27:
#0: ffffffff8c11c660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/u4:3/1210:
#0: ffff888019db8938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc900050efd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888072eaa0e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1c/0xf0 fs/super.c:418
3 locks held by kworker/u4:4/3037:
#0: ffff888019db8938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000d13fd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888074e020e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1c/0xf0 fs/super.c:418
2 locks held by getty/3947:
#0: ffff88814d09b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
4 locks held by kworker/1:4/4233:
#0: ffff888016871138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000304fd00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff88807b6560e0 (&type->s_umount_key#53){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff88806a79a090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
4 locks held by kworker/1:18/4289:
#0: ffff888016871138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000462fd00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888072eaa0e0 (&type->s_umount_key#53){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff8880791c3090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
4 locks held by kworker/0:6/4946:
#0: ffff888016871138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc900031dfd00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888022d600e0 (&type->s_umount_key#53){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff888074fe4090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
4 locks held by kworker/0:10/4950:
#0: ffff888016871138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000320fd00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888021f440e0 (&type->s_umount_key#53){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff888146ff0090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
4 locks held by kworker/0:16/4956:
#0: ffff888016871138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000326fd00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff88807ac860e0 (&type->s_umount_key#53){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff888079250090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
4 locks held by kworker/0:18/4958:
#0: ffff888016871138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000328fd00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888021e1c0e0 (&type->s_umount_key#53){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff88802b7f2090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
2 locks held by syz-executor/4972:
#0: ffff88801fd9a118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915
#1: ffff8881479b9468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xaa/0xb90 drivers/block/loop.c:1366
1 lock held by udevd/4980:
3 locks held by kworker/u4:6/4995:
#0: ffff888019db8938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc900033bfd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff88807ac860e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1c/0xf0 fs/super.c:418
3 locks held by kworker/u4:7/5209:
#0: ffff888019db8938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc900038efd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888021f440e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1c/0xf0 fs/super.c:418
2 locks held by syz.0.16/5256:
#0: ffff888068d9a878 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_file_release+0xbf/0xa50 fs/reiserfs/file.c:41
#1: ffff88806a79a090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
4 locks held by syz.0.16/5279:
#0: ffff88807b656460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
#1: ffff888068d9aaa0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888068d9aaa0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x183/0x220 fs/open.c:63
#2: ffffc900039b40f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc900039b40f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc900039b40f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#3: ffff88806a79a090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
3 locks held by kworker/u4:8/5321:
#0: ffff888019db8938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc900034dfd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff88807b6560e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1c/0xf0 fs/super.c:418
2 locks held by syz.5.82/5872:
#0: ffff88806f9c1498 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_file_release+0xbf/0xa50 fs/reiserfs/file.c:41
#1: ffff888079250090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
4 locks held by syz.5.82/5908:
#0: ffff88807ac86460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
#1: ffff88806f9c16c0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806f9c16c0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x183/0x220 fs/open.c:63
#2: ffffc900039340f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc900039340f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc900039340f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#3: ffff888079250090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
2 locks held by syz.1.211/6479:
#0: ffff88805a7cc2f8 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_file_release+0xbf/0xa50 fs/reiserfs/file.c:41
#1: ffff8880791c3090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
4 locks held by syz.1.211/6480:
#0: ffff888072eaa460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
#1: ffff88805a7cc520 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88805a7cc520 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x183/0x220 fs/open.c:63
#2: ffffc9000ca910f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc9000ca910f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc9000ca910f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#3: ffff8880791c3090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
3 locks held by kworker/u4:9/6580:
#0: ffff888019db8938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000db0fd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888022d600e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1c/0xf0 fs/super.c:418
2 locks held by syz.7.277/6741:
#0: ffff888068ded038 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_file_release+0xbf/0xa50 fs/reiserfs/file.c:41
#1: ffff888146ff0090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
4 locks held by syz.7.277/6742:
#0: ffff888021f44460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
#1: ffff888068ded260 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888068ded260 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x183/0x220 fs/open.c:63
#2: ffffc9000445b0f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc9000445b0f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc9000445b0f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#3: ffff888146ff0090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
2 locks held by syz.3.285/6768:
#0: ffff888068ee3c58 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_file_release+0xbf/0xa50 fs/reiserfs/file.c:41
#1: ffff8881465b2090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
4 locks held by syz.3.285/6779:
#0: ffff888074e02460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
#1: ffff888068ee3e80 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888068ee3e80 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x183/0x220 fs/open.c:63
#2: ffffc90004aa60f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc90004aa60f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc90004aa60f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#3: ffff8881465b2090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
2 locks held by syz-executor/6882:
#0: ffff88801fd9fd18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915
#1: ffff8881479d5468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xaa/0xb90 drivers/block/loop.c:1366
2 locks held by syz-executor/6910:
#0: ffff88801fda0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915
#1: ffff888147a30468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xaa/0xb90 drivers/block/loop.c:1366
2 locks held by syz.2.331/6941:
#0: ffff888068cc56d8 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_file_release+0xbf/0xa50 fs/reiserfs/file.c:41
#1: ffff888074fe4090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
4 locks held by syz.2.331/6954:
#0: ffff888022d60460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
#1: ffff888068cc5900 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888068cc5900 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x183/0x220 fs/open.c:63
#2: ffffc90005f3c0f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc90005f3c0f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc90005f3c0f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#3: ffff888074fe4090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
2 locks held by syz.6.418/7281:
#0: ffff88806fa4c2f8 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_file_release+0xbf/0xa50 fs/reiserfs/file.c:41
#1: ffff88802b7f2090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
4 locks held by syz.6.418/7282:
#0: ffff888021e1c460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
#1: ffff88806fa4c520 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806fa4c520 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x183/0x220 fs/open.c:63
#2: ffffc90003da90f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc90003da90f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc90003da90f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#3: ffff88802b7f2090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
3 locks held by syz.0.480/7425:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4980 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:in_irqentry_text kernel/stacktrace.c:380 [inline]
RIP: 0010:filter_irq_stacks+0x4b/0x90 kernel/stacktrace.c:398
Code: ff 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 08 ae 55 00 49 8b 04 de 48 3d e0 01 c0 89 0f 93 c1 48 3d d0 0e c0 89 <0f> 92 c2 84 d1 75 27 48 3d 00 00 e0 89 0f 92 c1 48 3d 07 00 e0 89
RSP: 0018:ffffc9000330f8f0 EFLAGS: 00000083
RAX: ffffffff81cc2668 RBX: 0000000000000005 RCX: 8fd88588c4343a00
RDX: 0000000000000001 RSI: 000000000000000a RDI: ffffc9000330f920
RBP: ffffc9000330fb38 R08: dffffc0000000000 R09: fffffbfff1ad32b6
R10: fffffbfff1ad32b6 R11: 1ffffffff1ad32b5 R12: 000000000000000a
R13: dffffc0000000000 R14: ffffc9000330f920 R15: ffffc9000330f948
FS: 00007f08415f5880(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5cc47faef8 CR3: 0000000022ad9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:39
kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3011 [inline]
call_rcu+0x182/0x930 kernel/rcu/tree.c:3091
__dentry_kill+0x4ef/0x650 fs/dcache.c:600
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xd8/0x1a0 fs/dcache.c:893
do_renameat2+0x704/0xf70 fs/namei.c:4987
__do_sys_rename fs/namei.c:5031 [inline]
__se_sys_rename fs/namei.c:5029 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5029
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f08416b6cc7
Code: e8 5e a7 09 00 f7 d8 19 c0 5b c3 0f 1f 84 00 00 00 00 00 b8 ff ff ff ff 5b c3 66 0f 1f 84 00 00 00 00 00 b8 52 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 01 61 17 00 f7 d8 64 89 02 b8
RSP: 002b:00007ffc4c1d9618 EFLAGS: 00000202 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 0000560bb3443730 RCX: 00007f08416b6cc7
RDX: 0000000000000000 RSI: 0000560bb3443730 RDI: 00007ffc4c1d9ad0
RBP: 0000560bb3443767 R08: 00007ffc4c1d9ad0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc4c1d9ad0
R13: 00007ffc4c1d96d0 R14: 0000560b754606d7 R15: 00007ffc4c1da760