watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:16588] Modules linked in: irq event stamp: 89473528 hardirqs last enabled at (89473527): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (89473527): [] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (89473528): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (79956): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (79939): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 16588 Comm: syz-executor.5 Not tainted 5.10.109 #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 80 6f 02 00 65 8b 05 1c c0 c2 7e a9 00 01 ff 00 74 RSP: 0018:ffff888019ec7d98 EFLAGS: 00000247 RAX: 00000000055541f7 RBX: dffffc0000000000 RCX: 1ffffffff0a8e199 RDX: 0000000000000000 RSI: ffffffff8186d021 RDI: ffffffff83debc84 RBP: ffff88800e860000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff888045f94000 R14: ffff888045f94450 R15: ffff888045f94000 FS: 00007f0ffa53e700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0ffa55ed80 CR3: 000000004d574000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: io_cqring_wait fs/io_uring.c:7063 [inline] __do_sys_io_uring_enter+0x801/0x1900 fs/io_uring.c:9145 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f0ffd00ab19 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:00007f0ffa53e188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f0ffd11e0e0 RCX: 00007f0ffd00ab19 RDX: 00000000fffffffb RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f0ffd064f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1686e8ef R14: 00007f0ffa53e300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16496 Comm: syz-executor.5 Not tainted 5.10.109 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:check_wait_context kernel/locking/lockdep.c:4663 [inline] RIP: 0010:__lock_acquire+0x731/0x5b00 kernel/locking/lockdep.c:4902 Code: d0 7c 08 84 d2 0f 85 0d 36 00 00 8b 35 88 e0 67 05 85 f6 0f 84 3a 07 00 00 31 c0 e9 0e ff ff ff 4c 8b 6c 24 58 40 38 6c 24 50 <76> 0d e8 48 70 c6 00 85 c0 0f 85 6b 0c 00 00 8b 44 24 08 85 c0 0f RSP: 0018:ffff88804bc77ab0 EFLAGS: 00000093 RAX: 0000000000000007 RBX: ffff88803db85454 RCX: 1ffff11007b70a8d RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff86555757 R10: fffffbfff0caaaea R11: 0000000000000001 R12: ffff88803db84bc0 R13: ffff88803db85470 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f0ffa580700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0ffa57fd80 CR3: 000000004d574000 CR4: 0000000000350ee0 Call Trace: lock_acquire kernel/locking/lockdep.c:5562 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5527 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x36/0x50 kernel/locking/spinlock.c:159 prepare_to_wait_exclusive+0x7d/0x2a0 kernel/sched/wait.c:267 io_cqring_wait fs/io_uring.c:7064 [inline] __do_sys_io_uring_enter+0x821/0x1900 fs/io_uring.c:9145 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f0ffd00ab19 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:00007f0ffa580188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f0ffd11df60 RCX: 00007f0ffd00ab19 RDX: 00000000fffffffb RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f0ffd064f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1686e8ef R14: 00007f0ffa580300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 00 00 add %al,(%rax) 4: 4d 8b 17 mov (%r15),%r10 7: 49 8b 16 mov (%r14),%rdx a: 48 0f bd c8 bsr %rax,%rcx e: 48 63 c9 movslq %ecx,%rcx 11: e9 5e ff ff ff jmpq 0xffffff74 16: 4c 01 d2 add %r10,%rdx 19: 49 89 17 mov %rdx,(%r15) 1c: e9 d1 fd ff ff jmpq 0xfffffdf2 21: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 26: 48 8b 34 24 mov (%rsp),%rsi * 2a: 65 48 8b 14 25 80 6f mov %gs:0x26f80,%rdx <-- trapping instruction 31: 02 00 33: 65 8b 05 1c c0 c2 7e mov %gs:0x7ec2c01c(%rip),%eax # 0x7ec2c056 3a: a9 00 01 ff 00 test $0xff0100,%eax 3f: 74 .byte 0x74