------------[ cut here ]------------ WARNING: CPU: 2 PID: 9911 at drivers/block/floppy.c:999 schedule_bh drivers/block/floppy.c:999 [inline] WARNING: CPU: 2 PID: 9911 at drivers/block/floppy.c:999 process_fd_request drivers/block/floppy.c:2847 [inline] WARNING: CPU: 2 PID: 9911 at drivers/block/floppy.c:999 __floppy_read_block_0.isra.0+0x291/0x320 drivers/block/floppy.c:4160 Modules linked in: CPU: 2 PID: 9911 Comm: syz-executor.0 Not tainted 6.4.0-rc7-syzkaller-00041-ge660abd551f1 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:schedule_bh drivers/block/floppy.c:999 [inline] RIP: 0010:process_fd_request drivers/block/floppy.c:2847 [inline] RIP: 0010:__floppy_read_block_0.isra.0+0x291/0x320 drivers/block/floppy.c:4160 Code: 84 24 b8 01 00 00 65 48 2b 04 25 28 00 00 00 0f 85 9e 00 00 00 48 81 c4 c0 01 00 00 5b 5d 41 5c 41 5d 41 5e c3 e8 df cc 5f fc <0f> 0b e9 5a ff ff ff e8 23 98 b2 fc e9 80 fe ff ff e8 c9 cc 5f fc RSP: 0018:ffffc90022f5f6c8 EFLAGS: 00010216 RAX: 0000000000000c36 RBX: 0000000000000001 RCX: ffffc90007319000 RDX: 0000000000040000 RSI: ffffffff85247a01 RDI: 0000000000000001 RBP: ffffea000196a540 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff920045ebed9 R13: ffffc90022f5f798 R14: dffffc0000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7f78b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7f9cdb0 CR3: 0000000062000000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: floppy_revalidate.isra.0+0x7ed/0xbf0 drivers/block/floppy.c:4206 floppy_open+0xac3/0xe90 drivers/block/floppy.c:4058 blkdev_get_whole+0x93/0x2c0 block/bdev.c:606 blkdev_get_by_dev.part.0+0x5e2/0xb80 block/bdev.c:756 blkdev_get_by_dev+0x6f/0x90 block/bdev.c:790 blkdev_open+0x140/0x2d0 block/fops.c:493 do_dentry_open+0x6cc/0x13f0 fs/open.c:920 do_open fs/namei.c:3636 [inline] path_openat+0x1baa/0x2750 fs/namei.c:3791 do_filp_open+0x1ba/0x410 fs/namei.c:3818 do_sys_openat2+0x16d/0x4c0 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_compat_sys_openat fs/open.c:1432 [inline] __se_compat_sys_openat fs/open.c:1430 [inline] __ia32_compat_sys_openat+0x143/0x1f0 fs/open.c:1430 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+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f7d579 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:00000000f7f78170 EFLAGS: 00000286 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f7f781c0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f734e000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 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 retq 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