INFO: task syz.2.7643:32483 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.7643 state:D stack:25008 pid:32483 ppid:24159 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
perf_pending_task_sync kernel/events/core.c:5031 [inline]
_free_event+0x171/0x10a0 kernel/events/core.c:5037
put_event kernel/events/core.c:5162 [inline]
perf_event_release_kernel+0x83e/0x8d0 kernel/events/core.c:5287
perf_release+0x37/0x40 kernel/events/core.c:5297
__fput+0x22c/0x920 fs/file_table.c:320
task_work_run+0x1d0/0x260 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0x982/0x2480 kernel/exit.c:880
do_group_exit+0x217/0x2d0 kernel/exit.c:1022
get_signal+0x1272/0x1350 kernel/signal.c:2871
arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
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:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9f4699c629
RSP: 002b:00007f9f478f2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffea RBX: 00007f9f46c15fa0 RCX: 00007f9f4699c629
RDX: 0000000000145240 RSI: 00002000000000c0 RDI: ffffffffffffff9c
RBP: 00007f9f46a32b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9f46c16038 R14: 00007f9f46c15fa0 R15: 00007ffc001bdca8
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2dfb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2e7d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4027:
#0: ffff88802fd76098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x429/0x1390 drivers/tty/n_tty.c:2198
6 locks held by syz.5.8585/3631:
1 lock held by syz.3.8584/3635:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3631 Comm: syz.5.8585 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:perf_trace_buf_alloc+0xfa/0x300 kernel/trace/trace_event_perf.c:419
Code: e8 6b e8 f7 ff 49 bd 00 00 00 00 00 fc ff df 4d 8d bf b0 54 03 00 4e 8d 24 e5 80 f9 64 8c 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 e7 e8 0c d4 48 00 4d 03 3c 24 4c 89 f0 48 c1 e8 03 42
RSP: 0018:ffffc90000007360 EFLAGS: 00000046
RAX: 1ffffffff18c9f30 RBX: 0000000000000034 RCX: ffff8880357d0000
RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 0000000000000002 R08: ffffffff8e1fcd2f R09: 1ffffffff1c3f9a5
R10: dffffc0000000000 R11: fffffbfff1c3f9a6 R12: ffffffff8c64f980
R13: dffffc0000000000 R14: ffffc90000007400 R15: 0000000000035600
FS: 00007f44436ac6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5dedcdaff8 CR3: 0000000054650000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
perf_trace_lock+0x197/0x390 include/trace/events/lock.h:50
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x8ad/0x920 kernel/locking/lockdep.c:5673
seqcount_lockdep_reader_access+0xe0/0x1d0 include/linux/seqlock.h:103
ktime_get+0x31/0x270 kernel/time/timekeeping.c:846
clockevents_program_event+0xe2/0x310 kernel/time/clockevents.c:326
hrtimer_interrupt+0x59d/0x9c0 kernel/time/hrtimer.c:1886
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:skb_ext_reset include/linux/skbuff.h:4738 [inline]
RIP: 0010:mac80211_hwsim_tx_frame_no_nl+0x57e/0x12c0 drivers/net/wireless/mac80211_hwsim.c:1661
Code: 00 4d 8d 7d 7f 4d 89 fc 49 c1 ec 03 41 0f b6 04 1c 84 c0 0f 85 83 0c 00 00 45 0f b6 37 31 ff 44 89 f6 e8 85 5b 86 fb 45 85 f6 <0f> 85 27 0b 00 00 e8 17 59 86 fb 4c 89 6c 24 70 4d 8d 7d 68 4d 89
RSP: 0018:ffffc90000007920 EFLAGS: 00000246
RAX: ffffffff85fc1bfb RBX: dffffc0000000000 RCX: 0000000000000100
RDX: ffff8880357d0000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007ac0 R08: ffffc900000079df R09: ffffc900000079b0
R10: dffffc0000000000 R11: fffff52000000f3c R12: 1ffff110050197c7
R13: ffff8880280cbdc0 R14: 0000000000000000 R15: ffff8880280cbe3f
mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/mac80211_hwsim.c:2058
mac80211_hwsim_beacon_tx+0x61e/0xae0 drivers/net/wireless/mac80211_hwsim.c:2121
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:788
ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824
mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
__run_hrtimer kernel/time/hrtimer.c:1747 [inline]
__hrtimer_run_queues+0x560/0xd70 kernel/time/hrtimer.c:1811
hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:format_decode+0x1059/0x1300 lib/vsprintf.c:2572
Code: 48 8b 4c 24 08 80 e1 07 38 c1 0f 8c de f2 ff ff be 08 00 00 00 48 8b 7c 24 08 e8 c2 bf b5 f7 e9 ca f2 ff ff 44 89 e1 80 e1 07 <38> c1 0f 8c e1 f2 ff ff 4c 89 e7 e8 b7 be b5 f7 e9 d4 f2 ff ff 48
RSP: 0018:ffffc900054e6990 EFLAGS: 00000246
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: 000000008a8cd900
RDX: ffffffff8a1d93b5 RSI: ffffffff8e08e600 RDI: 0000000000000036
RBP: 0000001000000000 R08: ffff8880357d0000 R09: 0000000000000005
R10: 0000000000000030 R11: 0000000000000002 R12: ffffffff8a8cd948
R13: 1ffffffff1519b29 R14: ffffffff8a8cd948 R15: ffff0a1000000500
vsnprintf+0xef/0x1c20 lib/vsprintf.c:2757
sprintf+0xe4/0x140 lib/vsprintf.c:3009
print_time kernel/printk/printk.c:1274 [inline]
info_print_prefix+0x168/0x360 kernel/printk/printk.c:1300
record_print_text+0x173/0x440 kernel/printk/printk.c:1349
console_emit_next_record+0x598/0xba0 kernel/printk/printk.c:2760
console_flush_all kernel/printk/printk.c:-1 [inline]
console_unlock+0x223/0x630 kernel/printk/printk.c:2906
vprintk_emit+0x4b3/0x6a0 kernel/printk/printk.c:2303
_printk+0xda/0x130 kernel/printk/printk.c:2328
validate_nla lib/nlattr.c:395 [inline]
__nla_validate_parse+0xd6d/0x2a40 lib/nlattr.c:607
__nla_parse+0x3c/0x50 lib/nlattr.c:704
__nlmsg_parse include/net/netlink.h:748 [inline]
genl_family_rcv_msg_attrs_parse+0x1c6/0x290 net/netlink/genetlink.c:565
genl_family_rcv_msg_doit+0xe5/0x330 net/netlink/genetlink.c:734
genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]
genl_rcv_msg+0x604/0x790 net/netlink/genetlink.c:850
netlink_rcv_skb+0x1fb/0x450 net/netlink/af_netlink.c:2511
genl_rcv+0x24/0x40 net/netlink/genetlink.c:861
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x74d/0x8d0 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x8ad/0xbd0 net/netlink/af_netlink.c:1872
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5be/0x970 net/socket.c:2518
___sys_sendmsg+0x2a2/0x360 net/socket.c:2572
__sys_sendmsg net/socket.c:2601 [inline]
__do_sys_sendmsg net/socket.c:2610 [inline]
__se_sys_sendmsg+0x1bb/0x2a0 net/socket.c:2608
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f444279c629
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:00007f44436ac028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4442a15fa0 RCX: 00007f444279c629
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000000a
RBP: 00007f4442832b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4442a16038 R14: 00007f4442a15fa0 R15: 00007fffcc028b48