Buffer I/O error on dev sr0, logical block 6, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_update_request: I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev sr0, logical block 7, async page read watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor:5200] Modules linked in: irq event stamp: 11083704 hardirqs last enabled at (11083703): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (11083703): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (11083704): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (8620378): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (8620359): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 5200 Comm: syz-executor Not tainted 5.10.190 #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 fa d8 41 fd 48 89 ef e8 c2 92 42 fd f6 c7 02 75 10 53 9d <65> ff 0d b4 2f 1d 7c 5b 5d e9 8d 00 3b 00 e8 b8 91 61 fd eb e9 66 RSP: 0018:ffff88804a48fc48 EFLAGS: 00000283 RAX: 0000000000a91fb7 RBX: 0000000000000283 RCX: 1ffffffff0d0fe52 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e53f98 RBP: ffff88800d454d80 R08: 0000000000000001 R09: ffffffff8685f737 R10: fffffbfff0d0bee6 R11: 0000000000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000001 R15: ffff888045c1ba04 FS: 00005555564cd400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00069a000 CR3: 000000004a6c6000 CR4: 0000000000350ef0 Call Trace: kmemleak_scan+0xa44/0x1270 mm/kmemleak.c:1540 kmemleak_write+0x576/0x680 mm/kmemleak.c:1826 full_proxy_write+0x11d/0x190 fs/debugfs/file.c:236 vfs_write+0x29a/0xa70 fs/read_write.c:603 ksys_write+0x12d/0x260 fs/read_write.c:658 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xcc RIP: 0033:0x7fc4b920c5c3 Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 RSP: 002b:00007ffc4b9af558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffc4b9afb98 RCX: 00007fc4b920c5c3 RDX: 0000000000000004 RSI: 00007fc4b92c2ed9 RDI: 0000000000000003 RBP: 0000000000000002 R08: 000000000000031e R09: 00007ffc4b9be080 R10: 00007ffc4b9be090 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc4b9af630 R14: 0000000000000000 R15: 0000000000000003 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 9pnet: Insufficient options for proto=fd EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue ---------------- 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 fa d8 41 fd callq 0xfd41d915 1b: 48 89 ef mov %rbp,%rdi 1e: e8 c2 92 42 fd callq 0xfd4292e5 23: f6 c7 02 test $0x2,%bh 26: 75 10 jne 0x38 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d b4 2f 1d 7c decl %gs:0x7c1d2fb4(%rip) # 0x7c1d2fe5 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: e9 8d 00 3b 00 jmpq 0x3b00c5 38: e8 b8 91 61 fd callq 0xfd6191f5 3d: eb e9 jmp 0x28 3f: 66 data16