INFO: task syz-executor:7675 blocked for more than 164 seconds.
Not tainted 6.14.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:19984 pid:7675 tgid:7675 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
__super_lock fs/super.c:56 [inline]
__super_lock_excl fs/super.c:71 [inline]
deactivate_super+0xb5/0xf0 fs/super.c:505
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413
task_work_run+0x251/0x310 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f50f938e497
RSP: 002b:00007ffeb5c57288 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f50f940e08c RCX: 00007f50f938e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb5c57340
RBP: 00007ffeb5c57340 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeb5c583d0
R13: 00007f50f940e08c R14: 000000000008612d R15: 00007ffeb5c58410
INFO: task syz.9.1327:11608 blocked for more than 165 seconds.
Not tainted 6.14.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.1327 state:D stack:24656 pid:11608 tgid:11587 ppid:9226 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
jfs_flush_journal+0x72c/0xec0 fs/jfs/jfs_logmgr.c:1564
jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:649
dquot_quota_sync+0xde/0x4a0 fs/quota/dquot.c:755
iterate_supers+0xc8/0x190 fs/super.c:934
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x38e/0xa30 fs/quota/quota.c:917
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f05f8f8d169
RSP: 002b:00007f05f9dc7038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f05f91a6160 RCX: 00007f05f8f8d169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f05f900e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f05f91a6160 R15: 00007ffec1c1df68
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8eb39360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb39360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb39360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by kworker/u8:6/1085:
2 locks held by getty/5596:
#0: ffff8880317820a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/7675:
#0: ffff88806be0c0e0 (&type->s_umount_key#49){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806be0c0e0 (&type->s_umount_key#49){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806be0c0e0 (&type->s_umount_key#49){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz.9.1327/11608:
#0: ffff88806be0c0e0 (&type->s_umount_key#49){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806be0c0e0 (&type->s_umount_key#49){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.1556/12590:
#0: ffff88806be0c0e0 (&type->s_umount_key#49){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806be0c0e0 (&type->s_umount_key#49){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
8 locks held by sed/13646:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7ab/0x920 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13649 Comm: dhcpcd-run-hook Not tainted 6.14.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:match_held_lock+0xb/0xb0 kernel/locking/lockdep.c:5297
Code: 6c 07 f5 e8 07 f9 ff ff 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 53 bd 01 00 00 00 48 39 77 10 <74> 67 48 89 fb 81 7f 20 00 00 20 00 72 59 48 8b 46 08 48 85 c0 75
RSP: 0018:ffffc9000436f2c8 EFLAGS: 00000046
RAX: 0000000000000004 RBX: 0000000000000003 RCX: ffffc9000436f303
RDX: 1ffff9200086de6c RSI: ffffffff9a880a08 RDI: ffff888033502968
RBP: 0000000000000001 R08: ffffffff903cf777 R09: 1ffffffff2079eee
R10: dffffc0000000000 R11: fffffbfff2079eef R12: 000000000000000f
R13: 0000000000000003 R14: ffff888033502968 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559705dfd000 CR3: 0000000037362000 CR4: 0000000000350ef0
Call Trace:
find_held_lock kernel/locking/lockdep.c:5341 [inline]
__lock_release kernel/locking/lockdep.c:5526 [inline]
lock_release+0x285/0xa30 kernel/locking/lockdep.c:5872
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
__debug_check_no_obj_freed lib/debugobjects.c:1108 [inline]
debug_check_no_obj_freed+0x561/0x580 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2284 [inline]
slab_free mm/slub.c:4609 [inline]
kmem_cache_free+0x114/0x410 mm/slub.c:4711
vma_lock_free kernel/fork.c:458 [inline]
__vm_area_free+0xe3/0x110 kernel/fork.c:514
exit_mmap+0x6b9/0xd40 mm/mmap.c:1308
__mmput+0x115/0x420 kernel/fork.c:1356
exec_mmap+0x7a5/0x890 fs/exec.c:1011
begin_new_exec+0x1281/0x2100 fs/exec.c:1267
load_elf_binary+0x973/0x2820 fs/binfmt_elf.c:1002
search_binary_handler fs/exec.c:1775 [inline]
exec_binprm fs/exec.c:1807 [inline]
bprm_execve+0x97b/0x1430 fs/exec.c:1859
do_execveat_common+0x57f/0x710 fs/exec.c:1966
do_execve fs/exec.c:2040 [inline]
__do_sys_execve fs/exec.c:2116 [inline]
__se_sys_execve fs/exec.c:2111 [inline]
__x64_sys_execve+0x92/0xb0 fs/exec.c:2111
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7dedd13ef7
Code: Unable to access opcode bytes at 0x7f7dedd13ecd.
RSP: 002b:00007ffed1138f38 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0000559705dfcf58 RCX: 00007f7dedd13ef7
RDX: 0000559705dfcf78 RSI: 0000559705dfcf58 RDI: 0000559705dfd000
RBP: 0000559705dfd000 R08: 0000559705dfd005 R09: 00007ffed113ce31
R10: 0000000000000008 R11: 0000000000000246 R12: 0000559705dfcf78
R13: 00007f7dedec1904 R14: 0000559705dfcf78 R15: 0000000000000000