linux-kernel - [syzbot] [usb?] general protection fault in status

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Message-ID: <6789f53f.050a0220.20d369.0054.GAE@google.com>
Date: Thu, 16 Jan 2025 22:14:23 -0800
From: syzbot <syzbot+83976e47ec1ef91e66f1@...kaller.appspotmail.com>
To: gregkh@...uxfoundation.org, i@...ithal.me, linux-kernel@...r.kernel.org, 
	linux-usb@...r.kernel.org, shuah@...nel.org, syzkaller-bugs@...glegroups.com, 
	valentina.manea.m@...il.com
Subject: [syzbot] [usb?] general protection fault in status_show

Hello,

syzbot found the following issue on:

HEAD commit:    be548645527a Merge tag 'for-linus' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=105adbc4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ad08f7f48e13abcd
dashboard link: https://syzkaller.appspot.com/bug?extid=83976e47ec1ef91e66f1
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=179bbef8580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12d51cb0580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/68edb33a6611/disk-be548645.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9c748ff58068/vmlinux-be548645.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6ae2859fc0e3/bzImage-be548645.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+83976e47ec1ef91e66f1@...kaller.appspotmail.com

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000081: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000408-0x000000000000040f]
CPU: 0 UID: 0 PID: 5830 Comm: syz-executor351 Not tainted 6.13.0-rc6-syzkaller-00290-gbe548645527a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:status_show_vhci drivers/usb/usbip/vhci_sysfs.c:80 [inline]
RIP: 0010:status_show+0x306/0x5a0 drivers/usb/usbip/vhci_sysfs.c:160
Code: 03 80 3c 02 00 0f 85 9c 02 00 00 48 8b 9b 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 08 04 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7d 02 00 00 4c 8b ab 08 04 00 00 c1 e5 04 41 bf
RSP: 0018:ffffc90003cbfad8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87534bb9
RDX: 0000000000000081 RSI: ffffffff87534d75 RDI: 0000000000000408
RBP: 000000000000000f R08: 0000000000000005 R09: 0000000000000000
R10: 000000000000000f R11: 64666b636f732020 R12: ffffc90003cbfb28
R13: ffff888034b8c02d R14: ffffffff87534ab0 R15: ffff888034b8c000
FS:  0000555582a4a380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000035336000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dev_attr_show+0x53/0xe0 drivers/base/core.c:2423
 sysfs_kf_seq_show+0x223/0x3e0 fs/sysfs/file.c:59
 seq_read_iter+0x4f4/0x12b0 fs/seq_file.c:230
 kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279
 new_sync_read fs/read_write.c:484 [inline]
 vfs_read+0x87f/0xbe0 fs/read_write.c:565
 ksys_read+0x12b/0x250 fs/read_write.c:708
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c749f72e9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd7fbd308 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fffd7fbd4d8 RCX: 00007f5c749f72e9
RDX: 0000000000000062 RSI: 0000000020001080 RDI: 0000000000000003
RBP: 00007f5c74a6a610 R08: 0000000000000000 R09: 00007fffd7fbd4d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffd7fbd4c8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:status_show_vhci drivers/usb/usbip/vhci_sysfs.c:80 [inline]
RIP: 0010:status_show+0x306/0x5a0 drivers/usb/usbip/vhci_sysfs.c:160
Code: 03 80 3c 02 00 0f 85 9c 02 00 00 48 8b 9b 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 08 04 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7d 02 00 00 4c 8b ab 08 04 00 00 c1 e5 04 41 bf
RSP: 0018:ffffc90003cbfad8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87534bb9
RDX: 0000000000000081 RSI: ffffffff87534d75 RDI: 0000000000000408
RBP: 000000000000000f R08: 0000000000000005 R09: 0000000000000000
R10: 000000000000000f R11: 64666b636f732020 R12: ffffc90003cbfb28
R13: ffff888034b8c02d R14: ffffffff87534ab0 R15: ffff888034b8c000
FS:  0000555582a4a380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000035336000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 80 3c 02 00 0f    	add    0xf00023c(%rax),%eax
   6:	85 9c 02 00 00 48 8b 	test   %ebx,-0x74b80000(%rdx,%rax,1)
   d:	9b                   	fwait
   e:	88 00                	mov    %al,(%rax)
  10:	00 00                	add    %al,(%rax)
  12:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  19:	fc ff df
  1c:	48 8d bb 08 04 00 00 	lea    0x408(%rbx),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 7d 02 00 00    	jne    0x2b1
  34:	4c 8b ab 08 04 00 00 	mov    0x408(%rbx),%r13
  3b:	c1 e5 04             	shl    $0x4,%ebp
  3e:	41                   	rex.B
  3f:	bf                   	.byte 0xbf


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

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If the report is already addressed, let syzbot know by replying with:
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If you want syzbot to run the reproducer, reply with:
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