[syzbot] [usb-storage?] divide error in isd200_ata_command

From: syzbot
Date: Mon Feb 26 2024 - 05:09:33 EST

Hello,

syzbot found the following issue on:

HEAD commit: f2e367d6ad3b Merge tag 'for-6.8/dm-fix-3' of git://git.ker..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=114e10e4180000
kernel config: https://syzkaller.appspot.com/x/.config?x=eff9f3183d0a20dd
dashboard link: https://syzkaller.appspot.com/bug?extid=28748250ab47a8f04100
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1064b372180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10aca6ac180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c55ca1fdc5ad/disk-f2e367d6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4556a82fb4ed/vmlinux-f2e367d6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/95338ed9dad1/bzImage-f2e367d6.xz

The issue was bisected to:

commit 321da3dc1f3c92a12e3c5da934090d2992a8814c
Author: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Date: Tue Feb 13 14:33:06 2024 +0000

scsi: sd: usb_storage: uas: Access media prior to querying device properties

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15a3934a180000
final oops: https://syzkaller.appspot.com/x/report.txt?x=17a3934a180000
console output: https://syzkaller.appspot.com/x/log.txt?x=13a3934a180000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+28748250ab47a8f04100@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 321da3dc1f3c ("scsi: sd: usb_storage: uas: Access media prior to querying device properties")

divide error: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 5070 Comm: usb-storage Not tainted 6.8.0-rc5-syzkaller-00297-gf2e367d6ad3b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:isd200_scsi_to_ata drivers/usb/storage/isd200.c:1318 [inline]
RIP: 0010:isd200_ata_command+0x776/0x2380 drivers/usb/storage/isd200.c:1529
Code: 62 fa 49 8d 7c 24 0c 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 00 18 00 00 41 0f b7 5c 24 0c 48 8b 7c 24 18 89 f8 31 d2 <f7> f3 41 89 d0 49 83 c4 06 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84
RSP: 0018:ffffc900043ffc00 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888023230000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900043ffd50 R08: ffffffff873161fd R09: ffffffff87315c95
R10: 0000000000000008 R11: ffff888023230000 R12: ffff88807f7a0000
R13: dffffc0000000000 R14: ffff888021da1000 R15: ffff88807c10a110
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563828985bd8 CR3: 000000002e0cc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
usb_stor_control_thread+0x4b1/0xa50 drivers/usb/storage/usb.c:368
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:isd200_scsi_to_ata drivers/usb/storage/isd200.c:1318 [inline]
RIP: 0010:isd200_ata_command+0x776/0x2380 drivers/usb/storage/isd200.c:1529
Code: 62 fa 49 8d 7c 24 0c 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 00 18 00 00 41 0f b7 5c 24 0c 48 8b 7c 24 18 89 f8 31 d2 <f7> f3 41 89 d0 49 83 c4 06 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84
RSP: 0018:ffffc900043ffc00 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888023230000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900043ffd50 R08: ffffffff873161fd R09: ffffffff87315c95
R10: 0000000000000008 R11: ffff888023230000 R12: ffff88807f7a0000
R13: dffffc0000000000 R14: ffff888021da1000 R15: ffff88807c10a110
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563828985bd8 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: fa cli
1: 49 8d 7c 24 0c lea 0xc(%r12),%rdi
6: 48 89 f8 mov %rdi,%rax
9: 48 c1 e8 03 shr $0x3,%rax
d: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax
12: 84 c0 test %al,%al
14: 0f 85 00 18 00 00 jne 0x181a
1a: 41 0f b7 5c 24 0c movzwl 0xc(%r12),%ebx
20: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi
25: 89 f8 mov %edi,%eax
27: 31 d2 xor %edx,%edx
* 29: f7 f3 div %ebx <-- trapping instruction
2b: 41 89 d0 mov %edx,%r8d
2e: 49 83 c4 06 add $0x6,%r12
32: 4c 89 e0 mov %r12,%rax
35: 48 c1 e8 03 shr $0x3,%rax
39: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax
3e: 84 .byte 0x84


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