RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 9231 at block/blk-mq.c:1258 blk_mq_start_request+0x646/0x780 block/blk-mq.c:1258 Modules linked in: CPU: 1 PID: 9231 Comm: syz-executor.0 Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:blk_mq_start_request+0x646/0x780 block/blk-mq.c:1258 Code: 00 fc ff df 48 8d 7d 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 35 01 00 00 48 89 df ff 55 10 e9 62 fc ff ff e8 bb 6c 42 fd 90 <0f> 0b 90 e9 f2 fa ff ff e8 ad 6c 42 fd 90 0f 0b 90 e9 00 fa ff ff RSP: 0018:ffffc9000313f3f8 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff88801d221200 RCX: ffffc90004e31000 RDX: 0000000000040000 RSI: ffffffff84452435 RDI: 0000000000000005 RBP: ffff88801d221294 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88801cf499f8 R13: 0000000000000001 R14: ffff88801d22131d R15: ffff88801d221320 FS: 0000000000000000(0000) GS:ffff8880b9900000(0063) knlGS:00000000f7f65b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020000180 CR3: 000000007b801000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: null_queue_rq+0x2e2/0x7a0 drivers/block/null_blk/main.c:1727 __blk_mq_issue_directly+0xe3/0x270 block/blk-mq.c:2578 blk_mq_request_issue_directly+0x120/0x190 block/blk-mq.c:2663 blk_mq_plug_issue_direct+0x19e/0x670 block/blk-mq.c:2684 blk_mq_flush_plug_list.part.0+0x1539/0x1d00 block/blk-mq.c:2793 blk_mq_flush_plug_list+0x62/0x80 block/blk-mq.c:2770 __blk_flush_plug+0x2c0/0x430 block/blk-core.c:1142 blk_finish_plug block/blk-core.c:1166 [inline] blk_finish_plug+0x54/0xa0 block/blk-core.c:1163 do_writepages+0x300/0x690 mm/page-writeback.c:2560 filemap_fdatawrite_wbc mm/filemap.c:387 [inline] filemap_fdatawrite_wbc+0x144/0x1b0 mm/filemap.c:377 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:420 filemap_write_and_wait_range.part.0+0x81/0x100 mm/filemap.c:675 filemap_write_and_wait_range mm/filemap.c:671 [inline] kiocb_write_and_wait+0xe6/0x1f0 mm/filemap.c:2679 blkdev_read_iter+0x1d3/0x510 block/fops.c:727 call_read_iter include/linux/fs.h:2014 [inline] aio_read+0x318/0x4e0 fs/aio.c:1551 __io_submit_one fs/aio.c:1952 [inline] io_submit_one+0x1480/0x1de0 fs/aio.c:2001 __do_compat_sys_io_submit fs/aio.c:2102 [inline] __se_compat_sys_io_submit fs/aio.c:2072 [inline] __ia32_compat_sys_io_submit+0x1d4/0x3c0 fs/aio.c:2072 do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline] __do_fast_syscall_32+0x62/0xe0 arch/x86/entry/common.c:230 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:255 entry_SYSENTER_compat_after_hwframe+0x70/0x7a RIP: 0023:0xf7f6a579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f655ac EFLAGS: 00000292 ORIG_RAX: 00000000000000f8 RAX: ffffffffffffffda RBX: 00000000f7f3c000 RCX: 0000000000000002 RDX: 0000000020000780 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi