watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.5:10742] Modules linked in: irq event stamp: 105839968 hardirqs last enabled at (105839967): [<ffffffff83e20008>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (105839967): [<ffffffff83e20008>] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (105839968): [<ffffffff83e057db>] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (8928728): [<ffffffff84001002>] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (8928717): [<ffffffff84001002>] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 10742 Comm: syz-executor.5 Not tainted 5.10.154 #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 5a f4 44 fd 48 89 ef e8 32 ae 45 fd f6 c7 02 75 10 53 9d <65> ff 0d 44 6f 20 7c 5b 5d e9 fd 3f 3e 00 e8 a8 79 64 fd eb e9 66 RSP: 0018:ffff888045a5fd00 EFLAGS: 00000202 RAX: 00000000064efd5f RBX: 0000000000000202 RCX: 1ffffffff0acdb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e20008 RBP: ffff88804a2a3450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804a2a3450 R13: 1ffff11008b4bfa5 R14: 0000000000000202 R15: ffff888045a5fea8 FS: 00007fef8e57f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d624000 CR3: 0000000016fae000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] prepare_to_wait_exclusive+0x129/0x2a0 kernel/sched/wait.c:273 io_cqring_wait fs/io_uring.c:7042 [inline] __do_sys_io_uring_enter+0x825/0x1910 fs/io_uring.c:9132 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fef91009b19 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:00007fef8e57f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fef9111cf60 RCX: 00007fef91009b19 RDX: 0000000000004220 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fef91063f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeebfd13df R14: 00007fef8e57f300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10745 Comm: syz-executor.3 Not tainted 5.10.154 #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 4c 45 c2 7e a9 00 01 ff 00 74 RSP: 0018:ffff888046ce7cd8 EFLAGS: 00000046 RAX: ffffc90003a44000 RBX: 0000000000000000 RCX: ffffffff8146789d RDX: 0000000000000000 RSI: ffffffff814678af RDI: 0000000000000005 RBP: ffff8880381b7450 R08: 000000000000ffff R09: 0000000000200008 R10: 0000000000000000 R11: 000000000003fffc R12: 0000000000000202 R13: 1ffff11008d9cfa5 R14: ffff8880381b7450 R15: ffff888046ce7ea8 FS: 00007fccfb273700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002001006e CR3: 0000000049e5a000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 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+0x4f/0x60 kernel/locking/spinlock.c:159 prepare_to_wait_exclusive+0x7d/0x2a0 kernel/sched/wait.c:267 io_cqring_wait fs/io_uring.c:7042 [inline] __do_sys_io_uring_enter+0x825/0x1910 fs/io_uring.c:9132 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fccfdcfdb19 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:00007fccfb273188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fccfde10f60 RCX: 00007fccfdcfdb19 RDX: 0000000000004220 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fccfdd57f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffd8d12dbf R14: 00007fccfb273300 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 5a f4 44 fd callq 0xfd44f473 19: 48 89 ef mov %rbp,%rdi 1c: e8 32 ae 45 fd callq 0xfd45ae53 21: f6 c7 02 test $0x2,%bh 24: 75 10 jne 0x36 26: 53 push %rbx 27: 9d popfq * 28: 65 ff 0d 44 6f 20 7c decl %gs:0x7c206f44(%rip) # 0x7c206f73 <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 fd 3f 3e 00 jmpq 0x3e4033 36: e8 a8 79 64 fd callq 0xfd6479e3 3b: eb e9 jmp 0x26 3d: 66 data16