blk_update_request: I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 8 prio class 0 Buffer I/O error on dev sr0, logical block 0, async page read Buffer I/O error on dev sr0, logical block 1, async page read netlink: 'syz-executor.2': attribute type 4 has an invalid length. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:14371] Modules linked in: irq event stamp: 3406898 hardirqs last enabled at (3406897): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (3406897): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (3406898): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (1442486): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (1442475): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 14371 Comm: syz-executor.3 Not tainted 5.10.179 #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: 3b 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 9a 16 42 fd 48 89 ef e8 62 d0 42 fd f6 c7 02 75 10 53 9d <65> ff 0d 54 82 1d 7c 5b 5d e9 4d 52 3b 00 e8 08 c8 61 fd eb e9 66 RSP: 0018:ffff8880537efc50 EFLAGS: 00000202 RAX: 000000000033fc31 RBX: 0000000000000202 RCX: 1ffffffff0acd931 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e4ecf8 RBP: ffff8880477da550 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000202 FS: 00007f8e98c6f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc0ea70ea8 CR3: 0000000046938000 CR4: 0000000000350ef0 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] __wake_up_common_lock+0xde/0x140 kernel/sched/wait.c:125 io_cqring_ev_posted+0x163/0x370 io_uring/io_uring.c:1642 io_req_complete_post+0x541/0xb20 io_uring/io_uring.c:1861 io_poll_task_func+0x1f1/0x2d0 io_uring/io_uring.c:5529 tctx_task_work+0x1fe/0x780 io_uring/io_uring.c:2202 task_work_run+0xe2/0x1a0 kernel/task_work.c:161 tracehook_notify_signal include/linux/tracehook.h:211 [inline] handle_signal_work kernel/entry/common.c:143 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x17c/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x1e0 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f8e9b71ab19 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:00007f8e98c6f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000001459 RBX: 00007f8e9b82e020 RCX: 00007f8e9b71ab19 RDX: 0000000000000000 RSI: 00000000000058ab RDI: 0000000000000004 RBP: 00007f8e9b774f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe04f8a70f R14: 00007f8e98c6f300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 14363 Comm: syz-executor.3 Not tainted 5.10.179 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:io_poll_get_ownership io_uring/io_uring.c:5345 [inline] RIP: 0010:io_poll_wake+0xf8/0x400 io_uring/io_uring.c:5613 Code: 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 6b 02 00 00 45 8b b4 24 e0 00 00 00 7f 00 00 00 44 89 f6 e8 eb 36 55 ff 41 83 fe 7f 7f 52 e8 90 3d RSP: 0018:ffff888053a37580 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff88803f29f518 RCX: ffffffff81eb24c6 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88803f29f5e0 RBP: 0000000008000001 R08: 0000000000000000 R09: ffff88803f29f5e3 R10: ffffed1007e53ebc R11: 0000000000000001 R12: ffff88803f29f500 R13: ffff88803f29f5e0 R14: 0000000040000080 R15: 0000000008000001 FS: 00007f8e98c90700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8e98c4dd80 CR3: 0000000046938000 CR4: 0000000000350ee0 Call Trace: __wake_up_common+0x14c/0x4c0 kernel/sched/wait.c:93 __wake_up_common_lock+0xd0/0x140 kernel/sched/wait.c:123 io_cqring_ev_posted+0x163/0x370 io_uring/io_uring.c:1642 io_req_complete_post+0x541/0xb20 io_uring/io_uring.c:1861 io_poll_task_func+0x1f1/0x2d0 io_uring/io_uring.c:5529 tctx_task_work+0x1fe/0x780 io_uring/io_uring.c:2202 task_work_run+0xe2/0x1a0 kernel/task_work.c:161 tracehook_notify_signal include/linux/tracehook.h:211 [inline] io_run_task_work io_uring/io_uring.c:2475 [inline] io_run_task_work+0x1ab/0x340 io_uring/io_uring.c:2462 io_uring_try_cancel_requests+0x54c/0xa10 io_uring/io_uring.c:9716 io_uring_cancel_generic.cold+0x44a/0x44f io_uring/io_uring.c:9865 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x26b/0x2600 kernel/exit.c:813 do_group_exit+0x125/0x310 kernel/exit.c:980 get_signal+0x4bc/0x22f0 kernel/signal.c:2751 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x1e0 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f8e9b71ab19 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:00007f8e98c90218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f8e9b82df68 RCX: 00007f8e9b71ab19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8e9b82df68 RBP: 00007f8e9b82df60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8e9b82df6c R13: 00007ffe04f8a70f R14: 00007f8e98c90300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 3b 00 cmp (%rax),%eax 2: 0f 1f 00 nopl (%rax) 5: 55 push %rbp 6: 48 89 fd mov %rdi,%rbp 9: 48 83 c7 18 add $0x18,%rdi d: 53 push %rbx e: 48 89 f3 mov %rsi,%rbx 11: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 16: e8 9a 16 42 fd callq 0xfd4216b5 1b: 48 89 ef mov %rbp,%rdi 1e: e8 62 d0 42 fd callq 0xfd42d085 23: f6 c7 02 test $0x2,%bh 26: 75 10 jne 0x38 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d 54 82 1d 7c decl %gs:0x7c1d8254(%rip) # 0x7c1d8285 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: e9 4d 52 3b 00 jmpq 0x3b5285 38: e8 08 c8 61 fd callq 0xfd61c845 3d: eb e9 jmp 0x28 3f: 66 data16