INFO: task syz-executor:6983 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22080 pid:6983 tgid:6983 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5354 [inline]
__schedule+0x165c/0x5520 kernel/sched/core.c:6966
__schedule_loop kernel/sched/core.c:7049 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7064
bit_wait+0x11/0xd0 kernel/sched/wait_bit.c:240
__wait_on_bit+0xb9/0x310 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit include/linux/wait_bit.h:77 [inline]
gfs2_glock_wait+0xbd/0x2a0 fs/gfs2/glock.c:1268
gfs2_glock_nq_init fs/gfs2/glock.h:253 [inline]
__gfs2_lookup+0x134/0x2a0 fs/gfs2/inode.c:998
__lookup_slow+0x2b7/0x410 fs/namei.c:1915
lookup_slow+0x53/0x70 fs/namei.c:1932
walk_component fs/namei.c:2278 [inline]
lookup_last fs/namei.c:2785 [inline]
path_lookupat+0x3f5/0x8c0 fs/namei.c:2809
filename_lookup+0x256/0x5d0 fs/namei.c:2838
user_path_at+0x40/0x160 fs/namei.c:3643
ksys_umount fs/namespace.c:2062 [inline]
__do_sys_umount fs/namespace.c:2070 [inline]
__se_sys_umount fs/namespace.c:2068 [inline]
__x64_sys_umount+0xf6/0x170 fs/namespace.c:2068
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff0ea59da57
RSP: 002b:00007ffed646b988 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007ff0ea632048 RCX: 00007ff0ea59da57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffed646ba40
RBP: 00007ffed646ba40 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffed646cb30
R13: 00007ff0ea632048 R14: 000000000007b848 R15: 00007ffed646ecf0
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
3 locks held by kworker/u8:2/35:
#0: ffff88801fbfd940 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline]
#0: ffff88801fbfd940 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385
#1: ffffc90000ab7c40 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3278 [inline]
#1: ffffc90000ab7c40 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3385
#2: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#2: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961
2 locks held by kworker/u8:7/1052:
2 locks held by getty/5591:
#0: ffff88803777a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:7/5915:
#0:
ffff88813fe4f140 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline]
ffff88813fe4f140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385
#1: ffffc90004b17c40 (key_gc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3278 [inline]
#1: ffffc90004b17c40 (key_gc_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3385
#2: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#2: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
7 locks held by kworker/u8:10/6491:
1 lock held by syz-executor/6983:
#0: ffff888067f59478 (&type->i_mutex_dir_key#32){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1044 [inline]
#0: ffff888067f59478 (&type->i_mutex_dir_key#32){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1931
1 lock held by syz-executor/7767:
7 locks held by syz-executor/12877:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd3/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 7767 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:rcu_is_watching+0x67/0xb0 kernel/rcu/tree.c:753
Code: 89 f7 e8 cc 41 84 00 48 c7 c3 d8 79 3d 93 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 79 f7 90 11 <74> 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f e9 d7 e7 06 0a cc e8 a1 72
RSP: 0018:ffffc90004697490 EFLAGS: 00000082
RAX: 0000000000ffa8cc RBX: ffff8880b87339d8 RCX: 0000000080000003
RDX: 0000000000000000 RSI: ffffffff8c287dc0 RDI: ffffffff8c287d80
RBP: 00000000ffffffff R08: ffffffff9031b4f7 R09: 1ffffffff206369e
R10: dffffc0000000000 R11: fffffbfff206369f R12: ffff888055cb0dc0
R13: ffffffff8237368d R14: ffffffff8e27e798 R15: dffffc0000000000
FS: 000055556865d500(0000) GS:ffff88812535c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555568678a28 CR3: 0000000069ee2000 CR4: 00000000003526f0
Call Trace:
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4b/0x3c0 kernel/locking/lockdep.c:5879
rcu_lock_release include/linux/rcupdate.h:322 [inline]
rcu_read_unlock include/linux/rcupdate.h:881 [inline]
get_non_dying_memcg_end mm/memcontrol.c:826 [inline]
mod_memcg_lruvec_state+0x209/0x220 mm/memcontrol.c:943
mod_lruvec_state mm/memcontrol.c:964 [inline]
lruvec_stat_mod_folio+0x239/0x3e0 mm/memcontrol.c:984
filemap_unaccount_folio+0x2d4/0x790 mm/filemap.c:187
__filemap_remove_folio+0xc5/0x530 mm/filemap.c:227
filemap_remove_folio+0xe6/0x1f0 mm/filemap.c:257
truncate_inode_folio+0x5d/0x70 mm/truncate.c:176
shmem_undo_range+0x42f/0x1660 mm/shmem.c:1145
shmem_truncate_range mm/shmem.c:1277 [inline]
shmem_evict_inode+0x289/0xae0 mm/shmem.c:1407
evict+0x61e/0xb10 fs/inode.c:841
filename_unlinkat+0x43f/0x610 fs/namei.c:5572
__do_sys_unlink fs/namei.c:5603 [inline]
__se_sys_unlink+0x2e/0x140 fs/namei.c:5600
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f920d19b907
Code: 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe0efdcc48 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f920d19b907
RDX: 00007ffe0efdcc70 RSI: 00007ffe0efdcd00 RDI: 00007ffe0efdcd00
RBP: 00007ffe0efdcd00 R08: 00007ffe0efddd00 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffe0efddd90
R13: 00007f920d232048 R14: 00000000000a169a R15: 00007ffe0efdddd0