Buffer I/O error on dev sr0, logical block 4, async page read Buffer I/O error on dev sr0, logical block 5, async page read Buffer I/O error on dev sr0, logical block 6, async page read Buffer I/O error on dev sr0, logical block 7, async page read watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.3:21004] Modules linked in: irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x1dba/0x6df0 softirqs last enabled at (0): [] copy_process+0x1dfe/0x6df0 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 0 PID: 21004 Comm: syz-executor.3 Tainted: G B 6.0.0-rc4-next-20220907 #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_cmp4+0x4/0x20 Code: 84 00 00 00 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 bc fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 9e fe ff ff 66 66 2e 0f 1f 84 00 00 RSP: 0018:ffff8880509df468 EFLAGS: 00000246 RAX: 0000000000000003 RBX: 0000000000000001 RCX: ffffffff8217cf10 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88800eaaca40 R08: 0000000000000000 R09: ffff88800eaaca43 R10: ffffed1001d55948 R11: 0000000000000001 R12: ffff88800eaaca10 R13: 0000000000000000 R14: ffff88800ea55500 R15: ffffe8ffffc03780 FS: 00007f19be76f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560f4767f720 CR3: 0000000044c6c000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 Call Trace: __sbq_wake_up+0x60/0x3d0 sbitmap_queue_clear+0xad/0x210 blk_mq_put_tag+0xd8/0x160 __blk_mq_free_request+0x2e0/0x380 blk_mq_free_request+0x35d/0x500 __scsi_execute+0x474/0x640 scsi_test_unit_ready+0xd3/0x350 sr_check_events+0x44c/0xa40 cdrom_check_events+0x64/0x110 sr_block_check_events+0xbf/0x100 disk_check_events+0xc7/0x420 bdev_check_media_change+0x12c/0x310 sr_block_open+0x10e/0x2b0 blkdev_get_whole+0x9b/0x2d0 blkdev_get_by_dev.part.0+0x5f0/0xb90 blkdev_get_by_dev+0x6f/0x90 blkdev_open+0x13c/0x2c0 do_dentry_open+0x6ca/0x12b0 path_openat+0x19e1/0x2800 do_filp_open+0x1b6/0x410 do_sys_openat2+0x171/0x4c0 __x64_sys_openat+0x13f/0x1f0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f19c11f9b19 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:00007f19be76f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f19c130cf60 RCX: 00007f19c11f9b19 RDX: 0000000000105802 RSI: 00000000200001c0 RDI: ffffffffffffff9c RBP: 00007f19c1253f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe534f76bf R14: 00007f19be76f300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 ---------------- Code disassembly (best guess): 0: 84 00 test %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: 48 8b 0c 24 mov (%rsp),%rcx a: 0f b7 d6 movzwl %si,%edx d: 0f b7 f7 movzwl %di,%esi 10: bf 03 00 00 00 mov $0x3,%edi 15: e9 bc fe ff ff jmpq 0xfffffed6 1a: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 21: 00 00 00 00 25: 90 nop 26: 48 8b 0c 24 mov (%rsp),%rcx * 2a: 89 f2 mov %esi,%edx <-- trapping instruction 2c: 89 fe mov %edi,%esi 2e: bf 05 00 00 00 mov $0x5,%edi 33: e9 9e fe ff ff jmpq 0xfffffed6 38: 66 data16 39: 66 data16 3a: 2e cs 3b: 0f .byte 0xf 3c: 1f (bad) 3d: 84 00 test %al,(%rax)