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* [syzbot] [block?] WARNING in invalidate_drive
@ 2023-07-14 22:40 syzbot
  0 siblings, 0 replies; only message in thread
From: syzbot @ 2023-07-14 22:40 UTC (permalink / raw)
  To: axboe, efremov, linux-block, linux-kernel, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    3f01e9fed845 Merge tag 'linux-watchdog-6.5-rc2' of git://w..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13914acca80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=150188feee7071a7
dashboard link: https://syzkaller.appspot.com/bug?extid=3254e329ee1f252d4915
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: i386

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-3f01e9fe.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ed16bd50e54f/vmlinux-3f01e9fe.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2bda39f6b871/bzImage-3f01e9fe.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3254e329ee1f252d4915@syzkaller.appspotmail.com

WARNING: CPU: 0 PID: 7350 at drivers/block/floppy.c:999 schedule_bh drivers/block/floppy.c:999 [inline]
WARNING: CPU: 0 PID: 7350 at drivers/block/floppy.c:999 process_fd_request drivers/block/floppy.c:2847 [inline]
WARNING: CPU: 0 PID: 7350 at drivers/block/floppy.c:999 invalidate_drive+0xf5/0x110 drivers/block/floppy.c:3217
Modules linked in:
CPU: 0 PID: 7350 Comm: syz-executor.0 Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #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:invalidate_drive+0xf5/0x110 drivers/block/floppy.c:3217
Code: 84 db 75 0a e8 0c 84 57 fc 31 c0 5b 5d c3 e8 02 84 57 fc 48 89 ef e8 ca e4 ff ff e8 f5 83 57 fc 31 c0 5b 5d c3 e8 eb 83 57 fc <0f> 0b eb 97 e8 92 b9 aa fc e9 29 ff ff ff 66 66 2e 0f 1f 84 00 00
RSP: 0018:ffffc900289efa20 EFLAGS: 00010216
RAX: 000000000000073b RBX: 0000000000000001 RCX: ffffc9000d0d4000
RDX: 0000000000040000 RSI: ffffffff852d5dd5 RDI: 0000000000000001
RBP: ffff88801dd7e000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000249
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff88802c600000(0063) knlGS:00000000f7f4fb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7f46db0 CR3: 000000001c15c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fd_locked_ioctl+0xbaf/0x19f0 drivers/block/floppy.c:3508
 fd_ioctl drivers/block/floppy.c:3576 [inline]
 fd_compat_ioctl+0x8a8/0x1bd0 drivers/block/floppy.c:3890
 compat_blkdev_ioctl+0x329/0x7d0 block/ioctl.c:677
 __do_compat_sys_ioctl+0x25b/0x2b0 fs/ioctl.c:968
 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: 0023:0xf7f75579
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:00000000f7f4f5cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000249
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
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


---
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2023-07-14 22:40 [syzbot] [block?] WARNING in invalidate_drive syzbot

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