watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:15869] Modules linked in: irq event stamp: 87912438 hardirqs last enabled at (87912437): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (87912437): [] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (87912438): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (462602): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (462465): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 15869 Comm: syz-executor.2 Not tainted 5.10.60 #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 7a aa 4c fd 48 89 ef e8 22 61 4d fd f6 c7 02 75 0c 53 9d <65> ff 0d 44 1b 28 7c 5b 5d c3 e8 dc bd 6b fd eb ed 66 2e 0f 1f 84 RSP: 0018:ffff88804a75fd00 EFLAGS: 00000202 RAX: 00000000053d6ff5 RBX: 0000000000000202 RCX: 1ffffffff0a8dee9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83d9d404 RBP: ffff88801b38f450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b38f450 R13: 1ffff110094ebfa5 R14: 0000000000000202 R15: ffff88804a75fea8 FS: 00007f74bd4d0700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cd21000 CR3: 0000000017eb0000 CR4: 0000000000350ef0 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] prepare_to_wait_exclusive+0x129/0x2a0 kernel/sched/wait.c:266 io_cqring_wait fs/io_uring.c:7039 [inline] __do_sys_io_uring_enter+0x8fd/0x1e90 fs/io_uring.c:9116 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:00007f74bd4d0188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 000000000000c897 RSI: 0000000000007048 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000020000000 R09: 0000000000000008 R10: 0000000000000001 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd470a317f R14: 00007f74bd4d0300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 15874 Comm: syz-executor.3 Not tainted 5.10.60 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:debug_lockdep_rcu_enabled+0x23/0x30 kernel/rcu/update.c:278 Code: cc cc cc cc cc cc cc 8b 05 4e e4 6e 01 85 c0 74 21 8b 05 9c f3 6e 01 85 c0 74 17 65 48 8b 04 25 80 ef 01 00 8b 80 ac 08 00 00 <85> c0 0f 94 c0 0f b6 c0 c3 cc cc cc cc 48 c7 c0 40 3f 03 00 65 48 RSP: 0018:ffff88804dc1fc40 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 1ffff11009b83f8d RCX: ffffffff812685bf RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff85472b08 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff85472b0f R10: fffffbfff0a8e561 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: ffff8880418e4468 R15: 0000000000000000 FS: 00007f1a07fa0700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000521d70 CR3: 0000000041b56000 CR4: 0000000000350ee0 Call Trace: rcu_read_lock_held_common kernel/rcu/update.c:102 [inline] rcu_read_lock_sched_held+0xd/0x70 kernel/rcu/update.c:121 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x3f9/0x490 kernel/locking/lockdep.c:5531 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x36/0x50 kernel/locking/spinlock.c:159 finish_wait+0xb2/0x210 kernel/sched/wait.c:385 io_cqring_wait fs/io_uring.c:7052 [inline] __do_sys_io_uring_enter+0x114f/0x1e90 fs/io_uring.c:9116 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:00007f1a07fa0188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 000000000000c897 RSI: 0000000000007048 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000020000000 R09: 0000000000000008 R10: 0000000000000001 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff2f6ffe0f R14: 00007f1a07fa0300 R15: 0000000000022000