From: syzbot <syzbot+af76b01c9a0f0ab60fb0@syzkaller.appspotmail.com>
To: gregkh@linuxfoundation.org, i@zenithal.me,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
shuah@kernel.org, syzkaller-bugs@googlegroups.com,
valentina.manea.m@gmail.com
Subject: [syzbot] [usb?] general protection fault in rebind_store
Date: Fri, 31 Jul 2026 17:36:41 -0700 [thread overview]
Message-ID: <6a6d3f99.13bfb6d0.1ecdd5.0254.GAE@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 11028ab62899 Merge tag 'probes-fixes-v7.2-rc5' of git://gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10bdb1b9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782
dashboard link: https://syzkaller.appspot.com/bug?extid=af76b01c9a0f0ab60fb0
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/dbf4cb7b4116/disk-11028ab6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/77761f1559a8/vmlinux-11028ab6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bb1ed2bbff0e/bzImage-11028ab6.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+af76b01c9a0f0ab60fb0@syzkaller.appspotmail.com
Oops: general protection fault, probably for non-canonical address 0xdffffc000000001e: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000000f0-0x00000000000000f7]
CPU: 1 UID: 0 PID: 20896 Comm: syz.4.10948 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:do_rebind drivers/usb/usbip/stub_main.c:204 [inline]
RIP: 0010:rebind_store+0x147/0x2d0 drivers/usb/usbip/stub_main.c:264
Code: 53 01 00 00 48 89 d8 48 c1 e0 07 4c 8b b0 d0 4b a5 9b 48 b8 00 00 00 00 00 fc ff df 49 8d be f0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 30 01 00 00 4d 8b be f0 00 00 00 4d 85 ff 74 3c
RSP: 0018:ffffc9000315fc30 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 000000000000001e RSI: 0000000000000004 RDI: 00000000000000f0
RBP: ffffffff9ba54c50 R08: 0000000000000000 R09: fffffbfff374a98c
R10: ffffffff9ba54c63 R11: 0000000000000001 R12: 0000000000000001
R13: ffff888022ae03e0 R14: 0000000000000000 R15: ffff88802cb21600
FS: 00007fdc96e646c0(0000) GS:ffff888123edc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33f18ff8 CR3: 0000000055192000 CR4: 00000000003526f0
Call Trace:
<TASK>
drv_attr_store+0x74/0xb0 drivers/base/bus.c:125
sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1050 fs/read_write.c:687
ksys_write+0x12a/0x250 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc95f9df99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdc96e64028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fdc96225fa0 RCX: 00007fdc95f9df99
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 0000000000000003
RBP: 00007fdc96034ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdc96226038 R14: 00007fdc96225fa0 R15: 00007ffc4c3f1648
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:do_rebind drivers/usb/usbip/stub_main.c:204 [inline]
RIP: 0010:rebind_store+0x147/0x2d0 drivers/usb/usbip/stub_main.c:264
Code: 53 01 00 00 48 89 d8 48 c1 e0 07 4c 8b b0 d0 4b a5 9b 48 b8 00 00 00 00 00 fc ff df 49 8d be f0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 30 01 00 00 4d 8b be f0 00 00 00 4d 85 ff 74 3c
RSP: 0018:ffffc9000315fc30 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 000000000000001e RSI: 0000000000000004 RDI: 00000000000000f0
RBP: ffffffff9ba54c50 R08: 0000000000000000 R09: fffffbfff374a98c
R10: ffffffff9ba54c63 R11: 0000000000000001 R12: 0000000000000001
R13: ffff888022ae03e0 R14: 0000000000000000 R15: ffff88802cb21600
FS: 00007fdc96e646c0(0000) GS:ffff888123edc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30f10ff8 CR3: 0000000055192000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 53 push %rbx
1: 01 00 add %eax,(%rax)
3: 00 48 89 add %cl,-0x77(%rax)
6: d8 48 c1 fmuls -0x3f(%rax)
9: e0 07 loopne 0x12
b: 4c 8b b0 d0 4b a5 9b mov -0x645ab430(%rax),%r14
12: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
19: fc ff df
1c: 49 8d be f0 00 00 00 lea 0xf0(%r14),%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 30 01 00 00 jne 0x164
34: 4d 8b be f0 00 00 00 mov 0xf0(%r14),%r15
3b: 4d 85 ff test %r15,%r15
3e: 74 3c je 0x7c
---
This report is generated by a bot. It may contain errors.
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reply other threads:[~2026-08-01 0:36 UTC|newest]
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