INFO: task syz.3.1216:12269 blocked for more than 151 seconds.
Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1216 state:D stack:23808 pid:12269 tgid:12269 ppid:7546 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
pipe_release+0x48/0x320 fs/pipe.c:727
__fput+0x23f/0x880 fs/file_table.c:431
task_work_run+0x24f/0x310 kernel/task_work.c:228
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:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc5c977e719
RSP: 002b:00007fffc08fa818 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fc5c9937a80 RCX: 00007fc5c977e719
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc5c9937a80 R08: 0000000000000006 R09: 00007fffc08fab0f
R10: 00000000003ffbe4 R11: 0000000000000246 R12: 00000000000468cf
R13: 00007fffc08fa920 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
2 locks held by kworker/0:1/9:
1 lock held by khungtaskd/30:
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/4993:
#0: ffff88802e1c60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/7552:
1 lock held by syz-executor/7557:
1 lock held by syz.3.1216/12269:
#0: ffff88803093a468 (&pipe->mutex){+.+.}-{3:3}, at: pipe_release+0x48/0x320 fs/pipe.c:727
1 lock held by syz.3.1216/12285:
#0: ffff88803093a468 (&pipe->mutex){+.+.}-{3:3}, at: splice_file_to_pipe+0x2e/0x500 fs/splice.c:1292
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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: 4690 Comm: udevd Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_release kernel/locking/lockdep.c:5530 [inline]
RIP: 0010:lock_release+0x31f/0xa30 kernel/locking/lockdep.c:5846
Code: 85 63 05 00 00 45 89 2c 24 41 81 fd ff ff 1f 00 0f 87 c0 02 00 00 48 8b 44 24 48 42 0f b6 04 38 84 c0 0f 85 18 05 00 00 89 16 <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 44 8b 64 24 44 74 0e 4c 89 f7
RSP: 0018:ffffc9000397ef00 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffff1100fa0753e RCX: ffffc9000397ef03
RDX: 0000000000000006 RSI: ffff88807d03a8d8 RDI: ffff88807d03a9d0
RBP: ffffc9000397f030 R08: ffffffff901d11af R09: 1ffffffff203a235
R10: dffffc0000000000 R11: fffffbfff203a236 R12: ffff88807d03a9f0
R13: 00000000000e0028 R14: ffff88807d03a9d0 R15: dffffc0000000000
FS: 00007fb9fd322c80(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32e20218 CR3: 000000007d2e4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
seqcount_lockdep_reader_access+0xfc/0x1e0 include/linux/seqlock.h:73
read_seqbegin include/linux/seqlock.h:757 [inline]
zone_span_seqbegin include/linux/memory_hotplug.h:103 [inline]
page_outside_zone_boundaries mm/page_alloc.c:437 [inline]
bad_range+0x5f/0x270 mm/page_alloc.c:456
expand+0x65/0x1a0 mm/page_alloc.c:1383
page_del_and_expand mm/page_alloc.c:1409 [inline]
__rmqueue_smallest mm/page_alloc.c:1581 [inline]
__rmqueue mm/page_alloc.c:2264 [inline]
rmqueue_bulk mm/page_alloc.c:2290 [inline]
__rmqueue_pcplist+0xa95/0x2640 mm/page_alloc.c:2983
rmqueue_pcplist mm/page_alloc.c:3025 [inline]
rmqueue mm/page_alloc.c:3056 [inline]
get_page_from_freelist+0x872/0x3190 mm/page_alloc.c:3454
__alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
alloc_slab_page+0x6a/0x120 mm/slub.c:2412
allocate_slab+0x5a/0x2f0 mm/slub.c:2578
new_slab mm/slub.c:2631 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818
__slab_alloc+0x58/0xa0 mm/slub.c:3908
__slab_alloc_node mm/slub.c:3961 [inline]
slab_alloc_node mm/slub.c:4122 [inline]
kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4141
fill_pool lib/debugobjects.c:168 [inline]
debug_objects_fill_pool+0x729/0x9f0 lib/debugobjects.c:615
debug_object_activate+0x135/0x510 lib/debugobjects.c:704
debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline]
__call_rcu_common kernel/rcu/tree.c:3071 [inline]
call_rcu+0x97/0xa70 kernel/rcu/tree.c:3190
__dentry_kill+0x497/0x630 fs/dcache.c:634
dput+0x19f/0x2b0 fs/dcache.c:857
do_unlinkat+0x4b9/0x830 fs/namei.c:4536
__do_sys_unlink fs/namei.c:4581 [inline]
__se_sys_unlink fs/namei.c:4579 [inline]
__x64_sys_unlink+0x47/0x50 fs/namei.c:4579
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: 0033:0x7fb9fcf17da7
Code: f0 ff ff 73 01 c3 48 8b 0d 7e 90 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 90 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffde598bde8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb9fcf17da7
RDX: 0000000000000001 RSI: 00007ffde598bec0 RDI: 0000562a9d3c00d8
RBP: 000000000000000b R08: 000000001af2638b R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000bb8
R13: 0000000200000001 R14: 0000000000000001 R15: 0000000000000000