syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.5.809:9167]
Modules linked in:
irq event stamp: 12304331
hardirqs last  enabled at (12304330): [<ffffffff8b59ae28>] irqentry_exit+0x5e8/0x670 kernel/entry/common.c:219
hardirqs last disabled at (12304331): [<ffffffff8b5997ae>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056
softirqs last  enabled at (1216558): [<ffffffff81853b00>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last  enabled at (1216558): [<ffffffff81853b00>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last  enabled at (1216558): [<ffffffff81853b00>] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
softirqs last disabled at (1218009): [<ffffffff81853b00>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last disabled at (1218009): [<ffffffff81853b00>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last disabled at (1218009): [<ffffffff81853b00>] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
CPU: 1 UID: 0 PID: 9167 Comm: syz.5.809 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x2f/0x90 kernel/kcov.c:314
Code: 8b 04 24 65 48 8b 14 25 08 10 80 92 65 8b 0d 18 14 bf 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 6c 16 00 00 00 <74> 52 8b 8a 48 16 00 00 83 f9 03 75 47 48 8b 8a 50 16 00 00 44 8b
RSP: 0018:ffffc90000a08358 EFLAGS: 00000246
RAX: ffffffff81cab5a9 RBX: 000000000000002c RCX: 0000000000000100
RDX: ffff88802852bd00 RSI: 0000000000000001 RDI: 0000000000000008
RBP: 0000000000000001 R08: 0000000000000022 R09: ffffffff8df41aa0
R10: ffffc90000a082c0 R11: ffffffff81acf3d0 R12: ffffffff8d9aedd8
R13: dffffc0000000000 R14: 0000607ed9eaf000 R15: 0000000000000001
FS:  00007fe393f626c0(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007794c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_trace_buf_alloc+0x179/0x280 kernel/trace/trace_event_perf.c:416
 do_perf_trace_lock include/trace/events/lock.h:50 [inline]
 perf_trace_lock+0x18d/0x3b0 include/trace/events/lock.h:50
 __do_trace_lock_release include/trace/events/lock.h:69 [inline]
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x37e/0x3b0 kernel/locking/lockdep.c:5879
 rcu_lock_release include/linux/rcupdate.h:341 [inline]
 rcu_read_unlock include/linux/rcupdate.h:897 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1195 [inline]
 unwind_next_frame+0x1ab1/0x23d0 arch/x86/kernel/unwind_orc.c:695
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_node_noprof+0x43c/0x720 mm/slub.c:5315
 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:586
 __alloc_skb+0x204/0x3a0 net/core/skbuff.c:690
 __netdev_alloc_skb+0xc1/0x850 net/core/skbuff.c:754
 netdev_alloc_skb include/linux/skbuff.h:3484 [inline]
 dev_alloc_skb include/linux/skbuff.h:3497 [inline]
 hsr_init_skb+0xef/0x6e0 net/hsr/hsr_device.c:267
 send_hsr_supervision_frame+0x143/0xcb0 net/hsr/hsr_device.c:316
 hsr_announce+0x1d5/0x360 net/hsr/hsr_device.c:421
 call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x61a/0x860 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d 54 fe d9 0b 48 89 de 5b e9 23 fc 5a 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 08 10 80 92 65 8b 15 58 18 bf 10 81 e2 00 01 ff 00
RSP: 0018:ffffc9000cefef08 EFLAGS: 00000293
RAX: ffffffff81c4da9b RBX: ffff88801bece2c0 RCX: ffff88802852bd00
RDX: 0000000000000000 RSI: ffffffff8df9a340 RDI: 0000000000000004
RBP: 000000340fd63fd0 R08: ffff88802852bd00 R09: 0000000000000020
R10: 000000000000001f R11: 0000000000000000 R12: ffff88801bece010
R13: ffff88801bece010 R14: 000000340fe2df11 R15: 00000000000002c4
 rb_read_data_buffer+0x44b/0x580 kernel/trace/ring_buffer.c:1858
 check_buffer+0x28a/0x750 kernel/trace/ring_buffer.c:4410
 __rb_reserve_next+0x592/0xdb0 kernel/trace/ring_buffer.c:4509
 rb_reserve_next_event kernel/trace/ring_buffer.c:4646 [inline]
 ring_buffer_lock_reserve+0xbb5/0x1010 kernel/trace/ring_buffer.c:4705
 __trace_buffer_lock_reserve kernel/trace/trace.c:1079 [inline]
 trace_event_buffer_lock_reserve+0x1d0/0x6f0 kernel/trace/trace.c:2808
 trace_event_buffer_reserve+0x1ef/0x2d0 kernel/trace/trace_events.c:672
 do_trace_event_raw_event_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
 trace_event_raw_event_bpf_trace_printk+0x100/0x260 kernel/trace/bpf_trace.h:11
 __do_trace_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
 trace_bpf_trace_printk+0x153/0x1b0 kernel/trace/bpf_trace.h:11
 ____bpf_trace_printk kernel/trace/bpf_trace.c:379 [inline]
 bpf_trace_printk+0x11e/0x190 kernel/trace/bpf_trace.c:362
 bpf_prog_930ede9872f2967c+0x3e/0x44
 bpf_dispatcher_nop_func include/linux/bpf.h:1378 [inline]
 __bpf_prog_run include/linux/filter.h:723 [inline]
 bpf_prog_run include/linux/filter.h:730 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
 bpf_trace_run2+0x284/0x4c0 kernel/trace/bpf_trace.c:2116
 __bpf_trace_contention_begin+0xdc/0x130 include/trace/events/lock.h:95
 __do_trace_contention_begin include/trace/events/lock.h:95 [inline]
 trace_contention_begin+0xde/0x100 include/trace/events/lock.h:95
 __mutex_lock_common kernel/locking/mutex.c:616 [inline]
 __mutex_lock+0x198/0x1350 kernel/locking/mutex.c:776
 perf_event_exit_task_context+0xdf/0x770 kernel/events/core.c:14185
 perf_event_exit_task+0x22f/0x3c0 kernel/events/core.c:14270
 do_exit+0x61a/0x22f0 kernel/exit.c:951
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4e0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2c1/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe39318f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe393f62038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: 0000000000000009 RBX: 00007fe3933e5fa0 RCX: 00007fe39318f749
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000021
RBP: 00007fe393213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe3933e6038 R14: 00007fe3933e5fa0 R15: 00007ffcc21386b8
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1302 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:97 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:115 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:140 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline]
RIP: 0010:kasan_check_range+0x98/0x2c0 mm/kasan/generic.c:200
Code: 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 <4c> 01 fb 41 80 3b 00 0f 85 de 01 00 00 49 ff c3 48 ff c3 75 ee e9
RSP: 0018:ffffc90000007bb0 EFLAGS: 00000002
RAX: 0000000000000001 RBX: e00000000e47dd9f RCX: ffffffff819e930d
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8dc11300
RBP: 0000000000000001 R08: ffffffff8dc11303 R09: 1ffffffff1b82260
R10: dffffc0000000000 R11: fffffbfff1b82260 R12: 0000000000000001
R13: 00000057d2fb1993 R14: fffffbfff1b82261 R15: 1ffffffff1b82260
FS:  0000000000000000(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007794c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline]
 debug_spin_unlock kernel/locking/spinlock_debug.c:101 [inline]
 do_raw_spin_unlock+0x4d/0x240 kernel/locking/spinlock_debug.c:141
 __raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_unlock+0x1e/0x50 kernel/locking/spinlock.c:186
 tick_do_update_jiffies64+0x269/0x310 kernel/time/tick-sched.c:148
 tick_sched_do_timer kernel/time/tick-sched.c:253 [inline]
 tick_nohz_handler+0xf5/0x710 kernel/time/tick-sched.c:312
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x4d0/0xc30 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x3e0 arch/x86/kernel/apic/apic.c:1062
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2037 [inline]
RIP: 0010:vprintk_emit+0x453/0x550 kernel/printk/printk.c:2425
Code: 0f 84 44 ff ff ff e8 9c 36 20 00 fb eb 44 e8 94 36 20 00 e8 ef df b8 09 4d 85 f6 74 94 e8 85 36 20 00 fb 48 c7 c7 80 59 f3 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 a5 2c
RSP: 0018:ffffc9000460f320 EFLAGS: 00000293
RAX: ffffffff81a0c13b RBX: ffffffff81a0bfb5 RCX: ffff888027893d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8df35980
RBP: ffffc9000460f3d0 R08: ffffffff8f822377 R09: 1ffffffff1f0446e
R10: dffffc0000000000 R11: fffffbfff1f0446f R12: 000000000000002d
R13: 0000000000000000 R14: 0000000000000200 R15: 0000000000000000
 dev_vprintk_emit+0x337/0x3f0 drivers/base/core.c:4914
 dev_printk_emit+0xe0/0x130 drivers/base/core.c:4925
 __netdev_printk+0x3e1/0x480 net/core/dev.c:12903
 netdev_warn+0x10a/0x160 net/core/dev.c:12956
 ieee802154_subif_start_xmit+0x136/0x190 net/mac802154/tx.c:232
 __netdev_start_xmit include/linux/netdevice.h:5273 [inline]
 netdev_start_xmit include/linux/netdevice.h:5282 [inline]
 xmit_one net/core/dev.c:3853 [inline]
 dev_hard_start_xmit+0x2cd/0x800 net/core/dev.c:3869
 sch_direct_xmit+0x241/0x4b0 net/sched/sch_generic.c:347
 __dev_xmit_skb net/core/dev.c:4169 [inline]
 __dev_queue_xmit+0x1379/0x31c0 net/core/dev.c:4785
 dev_queue_xmit include/linux/netdevice.h:3381 [inline]
 tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62
 kthread+0x1d0/0x3e0 drivers/block/aoe/aoecmd.c:1241
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>