From: syzbot <syzbot+190005201ced78a74ad6@syzkaller.appspotmail.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk
Subject: general protection fault in path_openat
Date: Fri, 31 Jan 2020 20:48:11 -0800 [thread overview]
Message-ID: <000000000000b926cf059d7c6552@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: ccaaaf6f Merge tag 'mpx-for-linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=115bda4ee00000
kernel config: https://syzkaller.appspot.com/x/.config?x=879390c6b09ccf66
dashboard link: https://syzkaller.appspot.com/bug?extid=190005201ced78a74ad6
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1674c776e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1565e101e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+190005201ced78a74ad6@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 3515 Comm: modprobe Not tainted 5.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_last fs/namei.c:3336 [inline]
RIP: 0010:path_openat+0x281/0x3460 fs/namei.c:3607
Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 76 29 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5c 24 58 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 28
RSP: 0018:ffffc90003c37a40 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81c24369
RDX: 0000000000000000 RSI: ffffffff81c24376 RDI: 0000000000000004
RBP: ffffc90003c37b90 R08: ffff88809dca63c0 R09: ffffed1015416ca2
R10: ffffed1015416ca1 R11: ffff8880aa0b6508 R12: ffff8880aa0b64a0
R13: ffff88809dca63c0 R14: ffffc90003c37d98 R15: ffffc90003c37bd0
FS: 00007f70d677c700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000009a184000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_filp_open+0x192/0x260 fs/namei.c:3637
do_sys_openat2+0x5eb/0x7e0 fs/open.c:1149
do_sys_open+0xf2/0x180 fs/open.c:1165
ksys_open include/linux/syscalls.h:1386 [inline]
__do_sys_open fs/open.c:1171 [inline]
__se_sys_open fs/open.c:1169 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1169
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f70d6094120
Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
RSP: 002b:00007ffdbe2762c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000558ff35f3240 RCX: 00007f70d6094120
RDX: 00007ffdbe2764fc RSI: 0000000000080000 RDI: 00007ffdbe2764e0
RBP: 00007f70d6564300 R08: 0000000000000000 R09: 0000558ff35f3219
R10: 0000000000000000 R11: 0000000000000246 R12: 0000558ff35eb210
R13: 0000558ff35f3210 R14: 0000558ff35eb210 R15: 00007ffdbe2764e0
Modules linked in:
---[ end trace bdc3fba9ce9969a3 ]---
RIP: 0010:do_last fs/namei.c:3336 [inline]
RIP: 0010:path_openat+0x281/0x3460 fs/namei.c:3607
Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 76 29 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5c 24 58 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 28
RSP: 0018:ffffc90003c37a40 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81c24369
RDX: 0000000000000000 RSI: ffffffff81c24376 RDI: 0000000000000004
RBP: ffffc90003c37b90 R08: ffff88809dca63c0 R09: ffffed1015416ca2
R10: ffffed1015416ca1 R11: ffff8880aa0b6508 R12: ffff8880aa0b64a0
R13: ffff88809dca63c0 R14: ffffc90003c37d98 R15: ffffc90003c37bd0
FS: 00007f70d677c700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd12577518 CR3: 000000009a184000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
This bug 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@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2020-02-01 4:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-01 4:48 syzbot [this message]
2020-02-01 5:34 ` general protection fault in path_openat Al Viro
2020-02-01 17:08 ` syzbot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=000000000000b926cf059d7c6552@google.com \
--to=syzbot+190005201ced78a74ad6@syzkaller.appspotmail.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.