INFO: task syz.1.477:7517 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.477 state:D stack:23272 pid:7517 ppid:5776 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x15ae/0x4660 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
perf_pending_task_sync kernel/events/core.c:5236 [inline]
_free_event+0x176/0xfb0 kernel/events/core.c:5242
put_event kernel/events/core.c:5370 [inline]
perf_event_release_kernel+0x7c8/0x850 kernel/events/core.c:5495
perf_release+0x3b/0x40 kernel/events/core.c:5505
__fput+0x221/0x940 fs/file_table.c:418
task_work_run+0x1d4/0x260 kernel/task_work.c:245
get_signal+0x11da/0x1390 kernel/signal.c:2679
arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f663259de59
RSP: 002b:00007f66334c8fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 00007f6632825fa0 RCX: 00007f663259de59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000640c7000
RBP: 00007f6632633e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f6632826038 R14: 00007f6632825fa0 R15: 00007ffd8931d6c8
Showing all locks held in the system:
1 lock held by rcu_tasks_trace/15:
#0: ffffffff8d132ad0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0xb11/0xdf0 kernel/rcu/tasks.h:607
1 lock held by khungtaskd/29:
#0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by getty/5531:
#0: ffff88803133a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x428/0x1370 drivers/tty/n_tty.c:2217
2 locks held by kworker/1:3/5816:
2 locks held by kworker/1:5/6742:
#0: ffff888017c72538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2628 [inline]
#0: ffff888017c72538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2730
#1: ffffc9000454fd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2628 [inline]
#1: ffffc9000454fd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2730
2 locks held by kworker/u4:19/8110:
1 lock held by syz.2.1336/10584:
#0: ffffffff8d1920e8 (bpf_event_mutex){+.+.}-{3:3}, at: perf_event_detach_bpf_prog+0x8b/0x310 kernel/trace/bpf_trace.c:2215
1 lock held by syz.2.1336/10585:
1 lock held by syz.4.1338/10589:
#0: ffffffff8d1920e8 (bpf_event_mutex){+.+.}-{3:3}, at: perf_event_detach_bpf_prog+0x8b/0x310 kernel/trace/bpf_trace.c:2215
1 lock held by syz.3.1334/10593:
#0: ffffffff8d1920e8 (bpf_event_mutex){+.+.}-{3:3}, at: perf_event_detach_bpf_prog+0x8b/0x310 kernel/trace/bpf_trace.c:2215
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf59/0xfa0 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10585 Comm: syz.2.1336 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:__next_zones_zonelist+0x0/0x130 mm/mmzone.c:59
Code: c3 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 6d ff ff ff 4c 89 f7 e8 10 b5 1c 00 e9 60 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 <66> 0f 1f 00 55 41 57 41 56 41 55 41 54 53 89 f3 49 89 fe 48 bd 00
RSP: 0018:ffffc900106f6b68 EFLAGS: 00000286
RAX: 1ffff920020ded85 RBX: ffffc900106f6c28 RCX: 0000000000000003
RDX: ffff88807c9acf00 RSI: 0000000000000002 RDI: ffff88813fffc300
RBP: 0000000000000002 R08: ffffc900106f6c20 R09: ffffc900106f6bf8
R10: ffffc900106f6c20 R11: fffff520020ded89 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88813fffc300 R15: 1ffff920020ded84
FS: 00007f06a33356c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f93699ed2f8 CR3: 0000000064ef2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
next_zones_zonelist include/linux/mmzone.h:1634 [inline]
first_zones_zonelist include/linux/mmzone.h:1658 [inline]
prepare_alloc_pages+0x357/0x5b0 mm/page_alloc.c:4286
__alloc_pages+0x134/0x460 mm/page_alloc.c:4490
alloc_slab_page+0x5d/0x180 mm/slub.c:1881
allocate_slab mm/slub.c:2028 [inline]
new_slab+0x87/0x2d0 mm/slub.c:2081
___slab_alloc+0xc5c/0x12f0 mm/slub.c:3253
__slab_alloc mm/slub.c:3339 [inline]
__slab_alloc_node mm/slub.c:3392 [inline]
slab_alloc_node mm/slub.c:3485 [inline]
__kmem_cache_alloc_node+0x11f/0x250 mm/slub.c:3534
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc_node_track_caller+0xa4/0x230 mm/slab_common.c:1027
__do_krealloc mm/slab_common.c:1402 [inline]
krealloc+0x86/0x120 mm/slab_common.c:1435
copy_array+0x64/0xf0 kernel/bpf/verifier.c:1591
copy_stack_state kernel/bpf/verifier.c:1645 [inline]
copy_func_state kernel/bpf/verifier.c:1774 [inline]
copy_verifier_state+0x817/0xd50 kernel/bpf/verifier.c:1815
push_stack+0x1b9/0x500 kernel/bpf/verifier.c:2078
check_cond_jmp_op+0x10a4/0x28b0 kernel/bpf/verifier.c:14799
do_check+0x6992/0xd0a0 kernel/bpf/verifier.c:17533
do_check_common+0xacc/0x1410 kernel/bpf/verifier.c:19879
do_check_main kernel/bpf/verifier.c:19942 [inline]
bpf_check+0x65d1/0xec30 kernel/bpf/verifier.c:20610
bpf_prog_load+0x10fa/0x1610 kernel/bpf/syscall.c:2753
__sys_bpf+0x5ba/0x890 kernel/bpf/syscall.c:5477
__do_sys_bpf kernel/bpf/syscall.c:5581 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5579 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f06a239de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f06a3335028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f06a2625fa0 RCX: 00007f06a239de59
RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005
RBP: 00007f06a2433e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f06a2626038 R14: 00007f06a2625fa0 R15: 00007ffc4b757fc8