| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <000000000000c5d58405e07c4d15@google.com>
Date: Thu, 02 Jun 2022 12:49:28 -0700
From: syzbot <syzbot+dd3c97de244683533381@...kaller.appspotmail.com>
To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
rafael@...nel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] general protection fault in __device_attach
syzbot has found a reproducer for the following issue on:
HEAD commit: d1dc87763f40 assoc_array: Fix BUG_ON during garbage collect
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17d2e7f5f00000
kernel config: https://syzkaller.appspot.com/x/.config?x=c51cd24814bb5665
dashboard link: https://syzkaller.appspot.com/bug?extid=dd3c97de244683533381
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15613e2bf00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c90adbf00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+dd3c97de244683533381@...kaller.appspotmail.com
usb usb9: device_add((null)) --> -22
general protection fault, probably for non-canonical address 0xdffffc0000000021: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]
CPU: 0 PID: 4190 Comm: syz-executor322 Not tainted 5.18.0-syzkaller-11972-gd1dc87763f40 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__device_attach+0xad/0x4a0 drivers/base/dd.c:948
Code: e8 03 42 80 3c 20 00 0f 85 a3 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 48 49 8d bc 24 08 01 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 6e 03 00 00 45 0f b6 b4 24 08 01 00
RSP: 0018:ffffc90003447b98 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 1ffff92000688f74 RCX: 0000000000000000
RDX: 0000000000000021 RSI: 0000000000000002 RDI: 0000000000000108
RBP: ffff88807a22f030 R08: 0000000000000000 R09: ffffffff8dbb1097
R10: fffffbfff1b76212 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 00000000fffffff0 R15: ffff88807a22f0b0
FS: 0000555557335300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b779a90b0 CR3: 000000007a1a7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
proc_ioctl.part.0+0x48e/0x560 drivers/usb/core/devio.c:2356
proc_ioctl drivers/usb/core/devio.c:182 [inline]
proc_ioctl_default drivers/usb/core/devio.c:2391 [inline]
usbdev_do_ioctl drivers/usb/core/devio.c:2747 [inline]
usbdev_ioctl+0x2c08/0x36f0 drivers/usb/core/devio.c:2807
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f2b77979779
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe17c6ed98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2b779bd184 RCX: 00007f2b77979779
RDX: 0000000020000040 RSI: 00000000c0105512 RDI: 0000000000000006
RBP: 00007ffe17c6edb0 R08: 0000000000000001 R09: 0000000000000001
R10: 000000000000ffff R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__device_attach+0xad/0x4a0 drivers/base/dd.c:948
Code: e8 03 42 80 3c 20 00 0f 85 a3 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 48 49 8d bc 24 08 01 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 6e 03 00 00 45 0f b6 b4 24 08 01 00
RSP: 0018:ffffc90003447b98 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 1ffff92000688f74 RCX: 0000000000000000
RDX: 0000000000000021 RSI: 0000000000000002 RDI: 0000000000000108
RBP: ffff88807a22f030 R08: 0000000000000000 R09: ffffffff8dbb1097
R10: fffffbfff1b76212 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 00000000fffffff0 R15: ffff88807a22f0b0
FS: 0000555557335300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b779a90b0 CR3: 000000007a1a7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: e8 03 42 80 3c callq 0x3c804208
5: 20 00 and %al,(%rax)
7: 0f 85 a3 03 00 00 jne 0x3b0
d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
14: fc ff df
17: 4c 8b 65 48 mov 0x48(%rbp),%r12
1b: 49 8d bc 24 08 01 00 lea 0x108(%r12),%rdi
22: 00
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 06 je 0x38
32: 0f 8e 6e 03 00 00 jle 0x3a6
38: 45 rex.RB
39: 0f .byte 0xf
3a: b6 b4 mov $0xb4,%dh
3c: 24 08 and $0x8,%al
3e: 01 00 add %eax,(%rax)
Powered by blists - more mailing lists