watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:7378] Modules linked in: irq event stamp: 86573408 hardirqs last enabled at (86573407): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (86573407): [] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (86573408): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (218566): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (218555): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 7378 Comm: syz-executor.3 Not tainted 5.10.56 #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 8a b8 60 fd 48 89 ef e8 a2 6e 61 fd f6 c7 02 75 0c 53 9d <65> ff 0d c4 0a 3c 7c 5b 5d c3 e8 dc dc 7f fd eb ed 66 2e 0f 1f 84 RSP: 0018:ffff88803ce6fd00 EFLAGS: 00000202 RAX: 000000000529015f RBX: 0000000000000202 RCX: 1ffffffff0a898f1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83c5e444 RBP: ffff88803fae1450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88803fae1450 R13: 1ffff110079cdfa5 R14: 0000000000000202 R15: ffff88803ce6fea8 FS: 00007f723ce97700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f624000 CR3: 000000003d922000 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+0x821/0x1910 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:00007f723ce97188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 000000000000a349 RSI: 0000000000006828 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000020000180 R09: 0000000000000008 R10: 0000000000000003 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcc7edacbf R14: 00007f723ce97300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7370 Comm: syz-executor.7 Not tainted 5.10.56 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:lock_release+0x5e/0x6b0 kernel/locking/lockdep.c:5568 Code: 03 48 c7 44 24 18 48 13 9a 84 48 01 e8 48 c7 44 24 20 b0 9c 26 81 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 04 f2 c7 40 08 04 f3 f3 f3 <65> 48 8b 04 25 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e9 83 03 RSP: 0018:ffff888025697cc0 EFLAGS: 00000086 RAX: ffffed1004ad2f9a RBX: 0000000000000287 RCX: ffffffff81275011 RDX: 1ffff11008d49c92 RSI: ffffffff8186769d RDI: ffff888046a4e468 RBP: 1ffff11004ad2f9a R08: 0000000000000001 R09: 0000000000000003 R10: ffffed1004ad2f9a R11: 0000000000000001 R12: ffff888046a4e468 R13: ffff888046a4e000 R14: ffff888046a4e450 R15: ffff888046a4e000 FS: 00007fa23d017700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fa24000 CR3: 000000000e472000 CR4: 0000000000350ee0 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_unlock_irqrestore+0x16/0x40 kernel/locking/spinlock.c:191 io_cqring_wait fs/io_uring.c:7052 [inline] __do_sys_io_uring_enter+0xded/0x1910 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:00007fa23d017188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 000000000000a349 RSI: 0000000000006828 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000020000180 R09: 0000000000000008 R10: 0000000000000003 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff6aeee05f R14: 00007fa23d017300 R15: 0000000000022000