watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.6.337:7365] Modules linked in: irq event stamp: 11115869 hardirqs last enabled at (11115868): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11115869): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (8473440): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (8473440): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (8473440): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (8473443): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (8473443): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (8473443): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 7365 Comm: syz.6.337 Not tainted 6.15.0-rc4-syzkaller-g38d976c32d85 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 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 40 75 92 65 8b 0d 08 7d b5 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 3c 16 00 00 00 <74> 52 8b 8a 18 16 00 00 83 f9 03 75 47 48 8b 8a 20 16 00 00 44 8b RSP: 0018:ffffc90000007a78 EFLAGS: 00000246 RAX: ffffffff870fd03c RBX: ffff88814d872608 RCX: 0000000000000100 RDX: ffff88802a539e00 RSI: 0000000000000006 RDI: 000000007ffffffe RBP: ffffc90000007b90 R08: ffff88814d87260b R09: 1ffff11029b0e4c1 R10: dffffc0000000000 R11: ffffed1029b0e4c2 R12: 00000000000000b0 R13: ffff88814d872158 R14: ffff88814d872000 R15: 0000000000000006 FS: 00007f90f0bf66c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f90f2fa5b88 CR3: 0000000051d00000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __refcount_add include/linux/refcount.h:290 [inline] __refcount_inc include/linux/refcount.h:366 [inline] refcount_inc include/linux/refcount.h:383 [inline] __dev_hold include/linux/netdevice.h:4321 [inline] netdev_hold include/linux/netdevice.h:4359 [inline] dev_hold include/linux/netdevice.h:4382 [inline] aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:424 [inline] aoecmd_cfg+0x20c/0x7c0 drivers/block/aoe/aoecmd.c:1370 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7090 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 eb c3 39 f6 e8 86 43 70 f6 fb bf 01 00 00 00 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9000ed87b40 EFLAGS: 00000286 RAX: 93770979cb045100 RBX: 0000000000000000 RCX: 93770979cb045100 RDX: 0000000000000000 RSI: ffffffff8d749fcc RDI: 0000000000000001 RBP: ffffc9000ed87be0 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001db0f68 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_schedule+0x0/0xc0 kernel/sched/core.c:6964 Code: 00 00 e8 83 c7 39 f6 c3 cc cc cc cc cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 56 53 48 83 e4 e0 48 83 ec 60 65 48 8b RSP: 0018:ffffc9000ed87ca0 EFLAGS: 00000287 RAX: ffffffff823a6187 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc900118d2000 RSI: 0000000000000da5 RDI: 0000000000000da6 RBP: ffffc9000ed87cf0 R08: ffffc9000ed87acf R09: 0000000000000000 R10: ffffc9000ed87ac0 R11: ffffffffa0000954 R12: ffff888029918018 R13: ffff888029918018 R14: ffffffff823a5e47 R15: 1ffff1100507fec1 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 rcu_read_unlock_sched include/linux/rcupdate.h:955 [inline] fd_install+0x3dc/0x540 fs/file.c:661 __do_sys_perf_event_open kernel/events/core.c:13430 [inline] __se_sys_perf_event_open+0x1a02/0x1c80 kernel/events/core.c:13061 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90f2d8e969 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:00007f90f0bf6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f90f2fb5fa0 RCX: 00007f90f2d8e969 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f90f2e10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f90f2fb5fa0 R15: 00007ffce2a37f18 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7372 Comm: kworker/u8:13 Not tainted 6.15.0-rc4-syzkaller-g38d976c32d85 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xe69/0x11c0 kernel/smp.c:885 Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 20 6d 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cb 68 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 b0 68 0b RSP: 0018:ffffc90003ecf700 EFLAGS: 00000293 RAX: ffffffff81b45620 RBX: ffff8880b893ad40 RCX: ffff8880304ebc00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003ecf860 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 1ffff11017108245 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8841228 FS: 0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f86166e6010 CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2455 [inline] text_poke_bp_batch+0x319/0x940 arch/x86/kernel/alternative.c:2665 text_poke_flush arch/x86/kernel/alternative.c:2856 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2863 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:850 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245