INFO: task syz-executor:5620 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:22336 pid:5620 tgid:5620 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
bit_wait+0x11/0xd0 kernel/sched/wait_bit.c:240
__wait_on_bit+0xac/0x300 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+0x131/0x2b0 fs/gfs2/inode.c:1001
__lookup_slow+0x1fb/0x2f0 fs/namei.c:1919
lookup_slow+0x53/0x70 fs/namei.c:1936
walk_component fs/namei.c:2282 [inline]
lookup_last fs/namei.c:2789 [inline]
path_lookupat+0x3f5/0x8c0 fs/namei.c:2813
filename_lookup+0x265/0x5d0 fs/namei.c:2842
user_path_at+0x40/0x160 fs/namei.c:3641
ksys_umount fs/namespace.c:2067 [inline]
__do_sys_umount fs/namespace.c:2075 [inline]
__se_sys_umount fs/namespace.c:2073 [inline]
__x64_sys_umount+0xf6/0x170 fs/namespace.c:2073
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea4bd9f0d7
RSP: 002b:00007ffe83c178f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007fea4be3330a RCX: 00007fea4bd9f0d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe83c179b0
RBP: 00007ffe83c179b0 R08: 00007ffe83c189b0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe83c18aa0
R13: 00007fea4be3330a R14: 000000000012d338 R15: 00007ffe83c1ac60
Showing all locks held in the system:
1 lock held by khungtaskd/32:
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5374:
#0: ffff8880364000a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5620:
#0: ffff88803b4407a0 (&type->i_mutex_dir_key#26){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1039 [inline]
#0: ffff88803b4407a0 (&type->i_mutex_dir_key#26){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1935
2 locks held by syz-executor/14769:
1 lock held by syz-executor/17661:
#0: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#0: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961
1 lock held by dhcpcd-run-hook/21555:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
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+0xfd7/0x1030 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 14769 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:869 [inline]
RIP: 0010:get_non_dying_memcg_end mm/memcontrol.c:831 [inline]
RIP: 0010:mod_memcg_lruvec_state+0x1ee/0x270 mm/memcontrol.c:952
Code: 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 76 32 f8 ff 49 8b 3f 48 63 d5 89 de e8 f9 ed ff ff e8 c4 f9 93 09 85 c0 <74> 3a e8 3b 7d 6f ff 84 c0 75 31 e8 b2 f9 93 09 85 c0 74 28 80 3d
RSP: 0018:ffffc90006e37540 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000013 RCX: ffff88807b29dd00
RDX: 0000000000000000 RSI: ffffffff8c4bda60 RDI: 00000000ffffffff
RBP: 00000000ffffffff R08: ffffffff905786f7 R09: 1ffffffff20af0de
R10: dffffc0000000000 R11: fffffbfff20af0df R12: ffff88801ca99ab0
R13: dffffc0000000000 R14: ffff88801ca98e0c R15: ffff88801ca99ab0
FS: 00005555708f8500(0000) GS:ffff888124f54000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559eca16e138 CR3: 000000004dadc000 CR4: 0000000000350ef0
Call Trace:
mod_lruvec_state mm/memcontrol.c:973 [inline]
lruvec_stat_mod_folio+0x239/0x3e0 mm/memcontrol.c:993
filemap_unaccount_folio+0x1eb/0x6e0 mm/filemap.c:185
__filemap_remove_folio+0xc4/0x530 mm/filemap.c:226
filemap_remove_folio+0xf1/0x3a0 mm/filemap.c:257
truncate_inode_folio+0x5d/0x70 mm/truncate.c:176
shmem_undo_range+0x3fb/0x15d0 mm/shmem.c:1145
shmem_truncate_range mm/shmem.c:1277 [inline]
shmem_evict_inode+0x280/0xa80 mm/shmem.c:1407
evict+0x624/0xb50 fs/inode.c:825
filename_unlinkat+0x43f/0x610 fs/namei.c:5589
__do_sys_unlink fs/namei.c:5620 [inline]
__se_sys_unlink+0x2e/0x140 fs/namei.c:5617
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7cc5d9cf87
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:00007ffed731b018 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7cc5d9cf87
RDX: 00007ffed731b040 RSI: 00007ffed731b0d0 RDI: 00007ffed731b0d0
RBP: 00007ffed731b0d0 R08: 00007ffed731c0d0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffed731c160
R13: 00007f7cc5e3330a R14: 0000000000153ae1 R15: 00007ffed731c1a0