------------[ cut here ]------------ WARNING: CPU: 2 PID: 15406 at drivers/block/floppy.c:1000 schedule_bh+0x5f/0x70 drivers/block/floppy.c:1000 Modules linked in: CPU: 2 PID: 15406 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:schedule_bh+0x5f/0x70 drivers/block/floppy.c:1000 Code: a7 13 07 fd 48 89 2d d0 6f e6 0b 5b 48 c7 c2 c0 25 49 8c 48 8b 35 a1 74 e6 0b bf 08 00 00 00 5d e9 36 9a db fc e8 81 13 07 fd <0f> 0b eb d1 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 e8 6b 13 07 fd RSP: 0018:ffffc9000d3f7698 EFLAGS: 00010216 RAX: 000000000000898e RBX: 0000000000000001 RCX: ffffc9000c202000 RDX: 0000000000040000 RSI: ffffffff8470b2af RDI: 0000000000000003 RBP: ffffffff84716650 R08: 0000000000000000 R09: ffffffff8c4925c7 R10: ffffffff8470b27f R11: 0000000000000000 R12: ffffea00007bc000 R13: 000000000000000c R14: ffffc9000d3f7780 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802cc00000(0063) knlGS:00000000f4541b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000559822d65950 CR3: 000000004b804000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: process_fd_request drivers/block/floppy.c:2851 [inline] __floppy_read_block_0.isra.0+0x224/0x2d0 drivers/block/floppy.c:4143 floppy_revalidate.isra.0+0x76d/0xa30 drivers/block/floppy.c:4189 floppy_open+0xac5/0xd70 drivers/block/floppy.c:4039 blkdev_get_whole+0x99/0x2d0 block/bdev.c:671 blkdev_get_by_dev.part.0+0x354/0xb50 block/bdev.c:826 blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859 blkdev_open+0x154/0x2e0 block/fops.c:501 do_dentry_open+0x4c8/0x1250 fs/open.c:822 do_open fs/namei.c:3426 [inline] path_openat+0x1cad/0x2750 fs/namei.c:3559 do_filp_open+0x1aa/0x400 fs/namei.c:3586 do_sys_openat2+0x16d/0x4d0 fs/open.c:1212 do_sys_open fs/open.c:1228 [inline] __do_compat_sys_openat fs/open.c:1288 [inline] __se_compat_sys_openat fs/open.c:1286 [inline] __ia32_compat_sys_openat+0x13f/0x1f0 fs/open.c:1286 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf6f47549 Code: 03 74 c0 01 10 05 03 74 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 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:00000000f45411a0 EFLAGS: 00000282 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f45411f0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f707d000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi