INFO: task syz.2.165:6287 blocked for more than 143 seconds.
Not tainted 6.14.0-rc7-syzkaller-01889-gcc04ed502457 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.165 state:D stack:25952 pid:6287 tgid:6287 ppid:5839 task_flags:0x400040 flags:0x00000000
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
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
pipe_release+0x48/0x320 fs/pipe.c:724
__fput+0x3e9/0x9f0 fs/file_table.c:464
task_work_run+0x24f/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: 0033:0x7f9d4558d169
RSP: 002b:00007ffe4845f478 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f9d457a7ba0 RCX: 00007f9d4558d169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f9d457a7ba0 R08: 0000000000000604 R09: 000000064845f76f
R10: 00007f9d457a7ac0 R11: 0000000000000246 R12: 00000000000176b1
R13: 00007ffe4845f570 R14: ffffffffffffffff R15: 00007ffe4845f590
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by udevd/5211:
2 locks held by getty/5593:
#0: ffff88814e6d00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900033032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
1 lock held by dhcpcd/5651:
1 lock held by dhcpcd/5652:
1 lock held by dhcpcd/5656:
1 lock held by syz-executor/5827:
1 lock held by syz-executor/5838:
1 lock held by syz-executor/5839:
1 lock held by syz-executor/5840:
2 locks held by syz-executor/5852:
1 lock held by syz.2.165/6287:
#0: ffff88807c8e9068 (&pipe->mutex){+.+.}-{4:4}, at: pipe_release+0x48/0x320 fs/pipe.c:724
1 lock held by syz.2.165/6288:
#0: ffff88807c8e9068 (&pipe->mutex){+.+.}-{4:4}, at: splice_file_to_pipe+0x2e/0x500 fs/splice.c:1292
1 lock held by udevd/6343:
1 lock held by udevd/6345:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc7-syzkaller-01889-gcc04ed502457 #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+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5827 Comm: syz-executor Not tainted 6.14.0-rc7-syzkaller-01889-gcc04ed502457 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:unwind_next_frame+0xb4/0x22d0 arch/x86/kernel/unwind_orc.c:482
Code: 18 00 00 89 84 24 84 00 00 00 48 89 6c 24 78 48 89 8c 24 90 00 00 00 48 89 5c 24 20 bf 01 00 00 00 e8 a0 4c 22 00 49 8d 6d 50 <48> 89 e8 48 c1 e8 03 48 89 44 24 38 42 80 3c 20 00 74 08 48 89 ef
RSP: 0018:ffffc90000a28850 EFLAGS: 00000006
RAX: 0000000000010004 RBX: 1ffff92000145124 RCX: ffffffff9a65f903
RDX: dffffc0000000000 RSI: ffffffff81d10a57 RDI: 0000000000000001
RBP: ffffc90000a28970 R08: 000000000000000d R09: ffffc90000a28a10
R10: ffffc90000a28970 R11: ffffffff81ad7cb0 R12: dffffc0000000000
R13: ffffc90000a28920 R14: ffffffff81d10a57 R15: 0000000000000000
FS: 00005555612bc500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562e1f67d0b0 CR3: 00000000344e4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
sigqueue_alloc kernel/signal.c:454 [inline]
__send_signal_locked+0x228/0xe90 kernel/signal.c:1086
do_send_sig_info kernel/signal.c:1268 [inline]
group_send_sig_info+0x292/0x310 kernel/signal.c:1418
do_bpf_send_signal+0xc3/0x1f0 kernel/trace/bpf_trace.c:809
irq_work_single+0xe2/0x240 kernel/irq_work.c:221
irq_work_run_list kernel/irq_work.c:252 [inline]
irq_work_run+0x18b/0x350 kernel/irq_work.c:261
__sysvec_irq_work+0xb8/0x430 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x9e/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:149 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:256 [inline]
RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:212
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 03 5c c3 03 0f 1f
RSP: 0018:ffffc90003e17bc8 EFLAGS: 00000246
RAX: 00000000000000f6 RBX: 0000000000000200 RCX: 000000000000083f
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f
RBP: 0000000000000000 R08: ffffffff815ff70e R09: 1ffff920007c2f64
R10: dffffc0000000000 R11: fffff520007c2f65 R12: ffff8880b8735ed0
R13: 0000000000000000 R14: 2c1008001f8bfbff R15: 0000000000000020
__apic_send_IPI_self arch/x86/include/asm/apic.h:455 [inline]
arch_irq_work_raise+0x6f/0x80 arch/x86/kernel/irq_work.c:31
irq_work_queue+0xa7/0x150 kernel/irq_work.c:124
bpf_send_signal_common+0x4a8/0x6b0 kernel/trace/bpf_trace.c:867
____bpf_send_signal kernel/trace/bpf_trace.c:876 [inline]
bpf_send_signal+0x1d/0x30 kernel/trace/bpf_trace.c:874
bpf_prog_7ba5217f62dcd359+0x41/0x45
bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
__bpf_prog_run include/linux/filter.h:701 [inline]
bpf_prog_run include/linux/filter.h:708 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2371 [inline]
bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2412
__bpf_trace_sys_enter+0x38/0x60 include/trace/events/syscalls.h:18
__do_trace_sys_enter include/trace/events/syscalls.h:18 [inline]
trace_sys_enter+0xb0/0x120 include/trace/events/syscalls.h:18
syscall_trace_enter+0xf8/0x150 kernel/entry/common.c:61
syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline]
do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb22a329359
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007fffb7aa4f80 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007fffb7aa5610 RCX: 00007fb22a329359
RDX: 00007fffb7aa4f80 RSI: 00007fffb7aa50b0 RDI: 0000000000000011
RBP: 0000000000000000 R08: 00000000275a8077 R09: 7fffffffffffffff
R10: 00007fb22b227038 R11: 0000000000000246 R12: 00007fffb7aa5930
R13: 0000000000000004 R14: 00007fffb7aa551c R15: 00007fffb7aa55b0