watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.3.273:7050] Modules linked in: irq event stamp: 13519795 hardirqs last enabled at (13519794): [] irqentry_exit+0x5dd/0x660 kernel/entry/common.c:219 hardirqs last disabled at (13519795): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (12417806): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (12417806): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (12417806): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (12417809): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (12417809): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (12417809): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 7050 Comm: syz.3.273 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:check_preemption_disabled+0x49/0x120 lib/smp_processor_id.c:53 Code: 8b 0d 1b a2 2d 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d fb a1 2d 07 48 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f <5d> c3 cc cc cc cc cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 RSP: 0018:ffffc90000a082f0 EFLAGS: 00000286 RAX: 0000000000000001 RBX: ffffffff8de10000 RCX: f97a997c53352b00 RDX: ffffffff8173ef25 RSI: ffffffff8bbfc640 RDI: ffffffff8bbfc600 RBP: ffffc90000a08400 R08: ffffc90000a088c0 R09: 0000000000000000 R10: ffffc90000a08598 R11: fffff520001410b5 R12: 1ffff92000141068 R13: 000000000000000d R14: ffffffff8de0ffa0 R15: dffffc0000000000 FS: 00007fa4a62d16c0(0000) GS:ffff8881261b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa4a62d0f98 CR3: 0000000079460000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0xec/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+0x389/0x3b0 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+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6663 [inline] kmem_cache_free+0x197/0x620 mm/slub.c:6774 tcp_write_queue_purge+0x143/0x300 net/ipv4/tcp.c:3340 tcp_done_with_error+0x43/0xd0 net/ipv4/tcp_input.c:4640 tcp_write_err net/ipv4/tcp_timer.c:77 [inline] tcp_write_timeout net/ipv4/tcp_timer.c:294 [inline] tcp_retransmit_timer+0x1d23/0x3380 net/ipv4/tcp_timer.c:600 tcp_write_timer+0x15c/0x2d0 net/ipv4/tcp_timer.c:736 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+0x27d/0x850 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7190 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 10 00 00 00 74 64 bf 01 00 00 00 e8 cb 4d 46 f6 e8 b6 93 7e f6 fb bf 01 00 00 00 1b a8 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9000b647b60 EFLAGS: 00000286 RAX: f97a997c53352b00 RBX: 0000000000000000 RCX: f97a997c53352b00 RDX: 0000000000000006 RSI: ffffffff8d76bea1 RDI: 0000000000000001 RBP: ffffc9000b647c00 R08: ffffffff8f805b77 R09: 1ffffffff1f00b6e R10: dffffc0000000000 R11: fffffbfff1f00b6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920016c8f6c irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:perf_unpin_context+0x0/0x70 kernel/events/core.c:1540 Code: c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <41> 56 53 48 89 fb e8 d5 6c cf ff 48 89 df e8 3d fc 59 09 48 8d 8b RSP: 0018:ffffc9000b647d18 EFLAGS: 00000246 RAX: f97a997c53352b00 RBX: ffff888078b41400 RCX: ffff88802c5d0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888078b41400 RBP: ffffc9000b647ed0 R08: ffffffff8f805b77 R09: 1ffffffff1f00b6e R10: dffffc0000000000 R11: fffffbfff1f00b6f R12: ffff88801cee2bf8 R13: ffff88802c5d0000 R14: 1ffff920016c8fb0 R15: ffff88801cee2e40 __do_sys_perf_event_open kernel/events/core.c:13817 [inline] __se_sys_perf_event_open+0x196e/0x1d90 kernel/events/core.c:13458 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa4a538f749 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:00007fa4a62d1038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fa4a55e6180 RCX: 00007fa4a538f749 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0 RBP: 00007fa4a5413f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa4a55e6218 R14: 00007fa4a55e6180 R15: 00007ffc98b04e58 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 1304 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:check_kcov_mode kernel/kcov.c:185 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217 Code: 24 65 48 8b 0c 25 08 00 77 92 65 8b 15 b8 b5 b5 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 6c 16 00 00 00 74 2c <8b> 91 48 16 00 00 83 fa 02 75 21 48 8b 91 50 16 00 00 48 8b 32 48 RSP: 0018:ffffc9000433e9b8 EFLAGS: 00000246 RAX: ffffffff8b454b69 RBX: 00000000ffffffff RCX: ffff8880270c1e80 RDX: 0000000000000000 RSI: 00000000fffffffe RDI: 00000000ffffffff RBP: ffffc9000433eae0 R08: ffffc9000433ea57 R09: 0000000000000000 R10: ffffc9000433ea40 R11: fffff52000867d4b R12: 00000000fffffffe R13: 0000000000000003 R14: ffffc9000433edc3 R15: 00000000ffff0a00 FS: 0000000000000000(0000) GS:ffff8881260b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8ae436ee9c CR3: 0000000079460000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: number+0x919/0xf60 lib/vsprintf.c:557 vsnprintf+0x8e5/0xee0 lib/vsprintf.c:2911 sprintf+0xd9/0x120 lib/vsprintf.c:3110 print_time kernel/printk/printk.c:1357 [inline] info_print_prefix+0x155/0x310 kernel/printk/printk.c:1383 record_print_text+0x154/0x420 kernel/printk/printk.c:1432 printk_get_next_message+0x26d/0x7b0 kernel/printk/printk.c:3018 console_emit_next_record kernel/printk/printk.c:3083 [inline] console_flush_one_record kernel/printk/printk.c:3215 [inline] console_flush_all+0x514/0xb60 kernel/printk/printk.c:3289 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3359 vprintk_emit+0x4f8/0x5f0 kernel/printk/printk.c:2426 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:12901 netdev_warn+0x10a/0x160 net/core/dev.c:12954 ieee802154_subif_start_xmit+0x136/0x190 net/mac802154/tx.c:232 __netdev_start_xmit include/linux/netdevice.h:5272 [inline] netdev_start_xmit include/linux/netdevice.h:5281 [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+0x136f/0x3140 net/core/dev.c:4783 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+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246