watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:20360] Modules linked in: irq event stamp: 134187892 hardirqs last enabled at (134187891): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (134187891): [] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (134187892): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (10396028): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (10396017): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 20360 Comm: syz-executor.4 Not tainted 5.10.45 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 Code: 80 00 00 00 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 ca 9c 61 fd 48 89 ef e8 52 58 62 fd f6 c7 02 75 0c 53 9d <65> ff 0d 34 e1 3c 7c 5b 5d c3 e8 2c bc 80 fd eb ed 66 2e 0f 1f 84 RSP: 0018:ffff888059ce7d08 EFLAGS: 00000202 RAX: 0000000007ff8b73 RBX: 0000000000000202 RCX: 1ffffffff0a89799 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83c50dd4 RBP: ffff88800e1da450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800e1da450 R13: 1ffff1100b39cfa5 R14: 0000000000000202 R15: ffff888059ce7ea8 FS: 00007fe30eea9700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffef7d047a8 CR3: 000000003aa0c000 CR4: 0000000000350ef0 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] prepare_to_wait_exclusive+0x122/0x220 kernel/sched/wait.c:262 io_cqring_wait fs/io_uring.c:7041 [inline] __do_sys_io_uring_enter+0x821/0x1910 fs/io_uring.c:9119 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe30eea9188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 0000000000466609 RDX: 000000000000bae1 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffc3708a87f R14: 00007fe30eea9300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 20358 Comm: syz-executor.5 Not tainted 5.10.45 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196 Code: 08 00 00 00 4d 8b 17 49 8b 16 48 0f bd c8 48 63 c9 e9 5e ff ff ff 4c 01 d2 49 89 17 e9 d1 fd ff ff 0f 1f 44 00 00 48 8b 34 24 <65> 48 8b 14 25 40 ef 01 00 65 8b 05 2c 63 c2 7e a9 00 01 ff 00 74 RSP: 0018:ffff888045ac7ce0 EFLAGS: 00000046 RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffff8145c8ed RDX: 0000000000000000 RSI: ffffffff8145c8ff RDI: 0000000000000005 RBP: ffff888019004450 R08: 0000000000000000 R09: ffff88801900435f R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000202 R13: 1ffff11008b58fa5 R14: ffff888019004450 R15: ffff888045ac7ea8 FS: 00007fece4de6700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4da1 CR3: 0000000040556000 CR4: 0000000000350ee0 Call Trace: trace_hardirqs_off kernel/trace/trace_preemptirq.c:82 [inline] trace_hardirqs_off+0x5f/0x160 kernel/trace/trace_preemptirq.c:74 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] _raw_spin_lock_irqsave+0x4b/0x50 kernel/locking/spinlock.c:159 prepare_to_wait_exclusive+0x7d/0x220 kernel/sched/wait.c:258 io_cqring_wait fs/io_uring.c:7041 [inline] __do_sys_io_uring_enter+0x821/0x1910 fs/io_uring.c:9119 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fece4de6188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 0000000000466609 RDX: 000000000000bae1 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffc816b353f R14: 00007fece4de6300 R15: 0000000000022000