watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:21614] Modules linked in: irq event stamp: 76449414 hardirqs last enabled at (76449413): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (76449413): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (76449414): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (56070): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (56053): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 21614 Comm: syz-executor.5 Not tainted 5.10.157 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 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: 3e 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 6a e4 44 fd 48 89 ef e8 42 9e 45 fd f6 c7 02 75 10 53 9d <65> ff 0d 44 5f 20 7c 5b 5d e9 fd 2f 3e 00 e8 58 71 64 fd eb e9 66 RSP: 0018:ffff888053d37d88 EFLAGS: 00000287 RAX: 00000000048e8685 RBX: 0000000000000287 RCX: 1ffffffff0acdb29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e21008 RBP: ffff8880554da450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff8880554da000 R14: ffff8880554da450 R15: ffff8880554da000 FS: 00007f14bfba3700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b24000 CR3: 000000004cafc000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: io_cqring_wait fs/io_uring.c:7055 [inline] __do_sys_io_uring_enter+0xdf1/0x1920 fs/io_uring.c:9131 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f14c262db19 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:00007f14bfba3188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f14c2740f60 RCX: 00007f14c262db19 RDX: 0000000000005054 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f14c2687f6d R08: 0000000020000000 R09: 0000000000000008 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcc584a32f R14: 00007f14bfba3300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 21621 Comm: syz-executor.0 Not tainted 5.10.157 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 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: ff ff ff b8 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 cd fd ff ff 90 48 8b 34 24 <65> 48 8b 14 25 80 6f 02 00 65 8b 05 cc 42 c2 7e a9 00 01 ff 00 74 RSP: 0018:ffff888055edfc58 EFLAGS: 00000246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8185fea4 RDI: ffff8880573f4000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880573f435f R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880573f4000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880573f4040 FS: 00007f7a67a66700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d125000 CR3: 0000000055894000 CR4: 0000000000350ee0 Call Trace: __io_cqring_overflow_flush+0x84/0xac0 fs/io_uring.c:1671 io_cqring_overflow_flush fs/io_uring.c:1729 [inline] io_cqring_overflow_flush+0xbd/0x160 fs/io_uring.c:1721 io_cqring_wait fs/io_uring.c:7041 [inline] __do_sys_io_uring_enter+0x813/0x1920 fs/io_uring.c:9131 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f7a6a4f0b19 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:00007f7a67a66188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f7a6a603f60 RCX: 00007f7a6a4f0b19 RDX: 0000000000005054 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f7a6a54af6d R08: 0000000020000000 R09: 0000000000000008 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe4463e20f R14: 00007f7a67a66300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 0f 1f 00 nopl (%rax) 3: 55 push %rbp 4: 48 89 fd mov %rdi,%rbp 7: 48 83 c7 18 add $0x18,%rdi b: 53 push %rbx c: 48 89 f3 mov %rsi,%rbx f: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 14: e8 6a e4 44 fd callq 0xfd44e483 19: 48 89 ef mov %rbp,%rdi 1c: e8 42 9e 45 fd callq 0xfd459e63 21: f6 c7 02 test $0x2,%bh 24: 75 10 jne 0x36 26: 53 push %rbx 27: 9d popfq * 28: 65 ff 0d 44 5f 20 7c decl %gs:0x7c205f44(%rip) # 0x7c205f73 <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 fd 2f 3e 00 jmpq 0x3e3033 36: e8 58 71 64 fd callq 0xfd647193 3b: eb e9 jmp 0x26 3d: 66 data16