INFO: task syz-executor:5830 blocked for more than 143 seconds.
Not tainted 6.15.0-rc2-syzkaller-00037-g834a4a689699 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:15056 pid:5830 tgid:5830 ppid:1 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
__mutex_lock_common kernel/locking/mutex.c:678 [inline]
__mutex_lock+0x805/0x10c0 kernel/locking/mutex.c:746
lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
jfs_umount+0x2ce/0x3a0 fs/jfs/jfs_umount.c:114
jfs_put_super+0x8a/0x190 fs/jfs/super.c:194
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1710
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
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/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f637f38f497
RSP: 002b:00007ffd8585af88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f637f410854 RCX: 00007f637f38f497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd8585b040
RBP: 00007ffd8585b040 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd8585c0d0
R13: 00007f637f410854 R14: 000000000001b0bb R15: 00007ffd8585c110
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8ed3dfa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3dfa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3dfa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
4 locks held by kworker/u8:2/36:
4 locks held by kworker/u8:3/53:
#0: ffff88801bef3948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801bef3948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc90000be7c60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90000be7c60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffffffff900de7d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17c/0xd60 net/core/net_namespace.c:608
#3: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by getty/5588:
#0: ffff88814d85a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/5829:
#0: ffff8880788ba0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880788ba0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880788ba0e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8f167ee8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/5830:
#0: ffff88804fdac0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88804fdac0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88804fdac0e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8f167ee8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/5835:
#0: ffff888043c9e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888043c9e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888043c9e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8f167ee8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6249:
#0: ffff8880568940e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880568940e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880568940e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8f167ee8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6251:
#0: ffff888053d580e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888053d580e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888053d580e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8f167ee8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6291:
#0: ffff88805d71e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805d71e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805d71e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8f167ee8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6636:
#0: ffff8880851280e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880851280e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880851280e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8f167ee8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
1 lock held by syz.1.151/7076:
#0: ffff8880788ba0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880788ba0e0 (&type->s_umount_key#69){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz-executor/7486:
#0: ffffffff8ed434b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#0: ffffffff8ed434b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x384/0x830 kernel/rcu/tree_exp.h:998
1 lock held by syz.3.297/7754:
#0: ffff888043c9e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888043c9e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.8.303/7826:
#0: ffff88805d71e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805d71e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.1.366/8330:
#0: ffff8880788ba0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880788ba0e0 (&type->s_umount_key#69){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
2 locks held by syz.2.371/8393:
1 lock held by syz.7.372/8391:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller-00037-g834a4a689699 #0 PREEMPT(full)
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+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:437
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
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: 8393 Comm: syz.2.371 Not tainted 6.15.0-rc2-syzkaller-00037-g834a4a689699 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__bfs kernel/locking/lockdep.c:1816 [inline]
RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1861 [inline]
RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2832 [inline]
RIP: 0010:check_prev_add kernel/locking/lockdep.c:3170 [inline]
RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3285 [inline]
RIP: 0010:validate_chain+0xe44/0x24e0 kernel/locking/lockdep.c:3909
Code: 8b 5c 24 30 49 83 c4 30 4c 39 e3 0f 84 b1 fe ff ff b0 01 4c 89 6c 24 40 eb 19 31 c0 4d 89 f7 4d 89 ee 4c 8b 6c 24 40 48 8b 1b <4c> 39 e3 0f 84 8f fe ff ff 48 89 6b 30 a8 01 74 ec 4d 89 f5 4d 89
RSP: 0018:ffffc9000b9ceed0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff9413a5a0 RCX: 00000000000000c2
RDX: 0000000000000008 RSI: ffff88802b38e5b0 RDI: 00000000000003dd
RBP: ffffffff96fe37d8 R08: ffffc9000b9cee90 R09: 0000000000000020
R10: 0000000000000000 R11: ffffffff819f5d80 R12: ffffffff9413a5a0
R13: 0000000000000000 R14: ffff88802b38e4c8 R15: ffff88802b38e568
FS: 00007fd87e9e16c0(0000) GS:ffff888124fc9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555645415c8 CR3: 0000000033d14000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235
lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
do_write_seqcount_begin_nested include/linux/seqlock.h:477 [inline]
do_write_seqcount_begin include/linux/seqlock.h:503 [inline]
psi_account_irqtime+0x37a/0x880 kernel/sched/psi.c:1026
__schedule+0xa96/0x51f0 kernel/sched/core.c:6760
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947
preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x134/0x140 kernel/locking/spinlock.c:194
__debug_check_no_obj_freed lib/debugobjects.c:1108 [inline]
debug_check_no_obj_freed+0x572/0x590 lib/debugobjects.c:1129
free_pages_prepare mm/page_alloc.c:1269 [inline]
__free_frozen_pages+0x581/0x10a0 mm/page_alloc.c:2680
discard_slab mm/slub.c:2720 [inline]
__put_partials+0x160/0x1c0 mm/slub.c:3189
put_cpu_partial+0x17e/0x250 mm/slub.c:3264
__slab_free+0x294/0x390 mm/slub.c:4516
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4151 [inline]
slab_alloc_node mm/slub.c:4200 [inline]
kmem_cache_alloc_lru_noprof+0x1e5/0x390 mm/slub.c:4219
ext4_alloc_inode+0x2e/0x530 fs/ext4/super.c:1388
alloc_inode+0x69/0x1b0 fs/inode.c:346
new_inode+0x22/0x180 fs/inode.c:1145
__ext4_new_inode+0x3e8/0x4700 fs/ext4/ialloc.c:960
ext4_mkdir+0x3ed/0xc00 fs/ext4/namei.c:3007
vfs_mkdir+0x2f9/0x500 fs/namei.c:4324
do_mkdirat+0x273/0x3f0 fs/namei.c:4357
__do_sys_mkdirat fs/namei.c:4374 [inline]
__se_sys_mkdirat fs/namei.c:4372 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4372
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd87db8c9d7
Code: 73 01 c3 48 c7 c1 a8 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 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd87e9e0e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fd87e9e0ef0 RCX: 00007fd87db8c9d7
RDX: 00000000000001ff RSI: 0000200000000f00 RDI: 00000000ffffff9c
RBP: 00002000000002c0 R08: 00002000000007c0 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000f00
R13: 00007fd87e9e0eb0 R14: 0000000000000000 R15: 0000000000000000