watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.7:12646] Modules linked in: irq event stamp: 94025526 hardirqs last enabled at (94025525): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (94025525): [] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (94025526): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (3363546): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (3363535): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 12646 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:__sanitizer_cov_trace_const_cmp1+0x0/0x20 kernel/kcov.c:270 Code: 1f 84 00 00 00 00 00 0f 1f 00 48 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 0c ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 <48> 8b 0c 24 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 e9 ea fe ff ff RSP: 0018:ffff88804d88fd60 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: ffff888046a8c000 RCX: ffffffff8184b8cf RDX: 1ffff11008d5186b RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: ffff888046a8c35f R10: ffffed1008d5186b R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888046a8c000 FS: 00007f65fd08b700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016ef3b8 CR3: 00000000655c8000 CR4: 0000000000350ef0 Call Trace: io_cqring_overflow_flush+0x5d/0x160 fs/io_uring.c:1705 io_cqring_wait fs/io_uring.c:7038 [inline] __do_sys_io_uring_enter+0x80f/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:00007f65fd08b188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 000000000002d423 RSI: 0000000000000e74 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd527de03f R14: 00007f65fd08b300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 12648 Comm: syz-executor.2 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:instrument_atomic_read include/linux/instrumented.h:71 [inline] RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] RIP: 0010:hlock_class kernel/locking/lockdep.c:198 [inline] RIP: 0010:mark_lock+0xf0/0x2df0 kernel/locking/lockdep.c:4507 Code: 0f 8e 6f 1f 00 00 45 0f b7 6c 24 20 66 41 81 e5 ff 1f 45 0f b7 ed be 08 00 00 00 4c 89 e8 48 c1 f8 06 48 8d 3c c5 20 26 4f 86 cb 8e 44 00 4c 0f a3 2d e3 21 29 05 0f 83 14 01 00 00 4f 8d 6c RSP: 0018:ffff888059147988 EFLAGS: 00000017 RAX: 000000000000001b RBX: 1ffff1100b228f38 RCX: 1ffff11002ca5dba RDX: 0000000000000002 RSI: 0000000000000008 RDI: ffffffff864f26f8 RBP: 0000000000000008 R08: 0000000000000000 R09: ffffffff864f26ff R10: fffffbfff0c9e4df R11: 0000000000000001 R12: ffff88801652edb0 R13: 00000000000006e0 R14: ffff88801652edd0 R15: 0000000000000100 FS: 00007fb9d3a00700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 0000000066724000 CR4: 0000000000350ee0 Call Trace: mark_usage kernel/locking/lockdep.c:4450 [inline] __lock_acquire+0x8a1/0x5b20 kernel/locking/lockdep.c:4904 lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __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+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:00007fb9d3a00188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 000000000002d423 RSI: 0000000000000e74 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffebacd8b1f R14: 00007fb9d3a00300 R15: 0000000000022000