From: syzbot <syzbot+9c69c282adc4edd2b540@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org,
miklos@szeredi.hu, syzkaller-bugs@googlegroups.com
Subject: Re: WARNING in ovl_instantiate
Date: Sat, 15 Dec 2018 11:34:03 -0800 [thread overview]
Message-ID: <00000000000058055a057d14a1f4@google.com> (raw)
In-Reply-To: <000000000000064bcf057a59e3b9@google.com>
syzbot has found a reproducer for the following crash on:
HEAD commit: d14b746c6c1c Add linux-next specific files for 20181214
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=143f9a15400000
kernel config: https://syzkaller.appspot.com/x/.config?x=1da6d2d18f803140
dashboard link: https://syzkaller.appspot.com/bug?extid=9c69c282adc4edd2b540
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a6e543400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+9c69c282adc4edd2b540@syzkaller.appspotmail.com
overlayfs: filesystem on './file0' not supported as upperdir
overlayfs: filesystem on './file0' not supported as upperdir
overlayfs: filesystem on './file0' not supported as upperdir
overlayfs: filesystem on './file0' not supported as upperdir
overlayfs: filesystem on './file0' not supported as upperdir
WARNING: CPU: 1 PID: 28918 at fs/overlayfs/dir.c:263
ovl_instantiate+0x369/0x400 fs/overlayfs/dir.c:263
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 28918 Comm: syz-executor1 Not tainted 4.20.0-rc6-next-20181214+
#171
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x244/0x39d lib/dump_stack.c:113
panic+0x2ad/0x632 kernel/panic.c:214
__warn.cold.8+0x20/0x4f kernel/panic.c:571
report_bug+0x254/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:ovl_instantiate+0x369/0x400 fs/overlayfs/dir.c:263
Code: c3 89 c6 e8 89 35 ed fe 85 db 0f 85 9e 00 00 00 e8 6c 34 ed fe 4c 89
e7 45 31 f6 e8 a1 b1 44 ff e9 ec fe ff ff e8 57 34 ed fe <0f> 0b e9 e0 fe
ff ff e8 4b 34 ed fe 0f 0b e9 63 ff ff ff e8 ef 88
RSP: 0018:ffff8881ca6679a8 EFLAGS: 00010293
RAX: ffff8881d39c44c0 RBX: ffff8881ca667a40 RCX: ffffffff8292cd44
RDX: 0000000000000000 RSI: ffffffff8292cec9 RDI: 0000000000000007
RBP: ffff8881ca667a68 R08: ffff8881d39c44c0 R09: ffffed10394ccee8
R10: ffffed10394ccee8 R11: 0000000000000003 R12: ffff8881a357c8c0
R13: ffff8881ca6679e0 R14: ffffffffffffff8c R15: 0000000000000000
ovl_create_over_whiteout fs/overlayfs/dir.c:518 [inline]
ovl_create_or_link+0xad6/0x1560 fs/overlayfs/dir.c:582
ovl_create_object+0x2e9/0x3a0 fs/overlayfs/dir.c:616
ovl_symlink+0x24/0x30 fs/overlayfs/dir.c:651
vfs_symlink+0x37a/0x5d0 fs/namei.c:4127
do_symlinkat+0x242/0x2d0 fs/namei.c:4154
__do_sys_symlink fs/namei.c:4173 [inline]
__se_sys_symlink fs/namei.c:4171 [inline]
__x64_sys_symlink+0x59/0x80 fs/namei.c:4171
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457659
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fbde1680c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457659
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000040
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbde16816d4
R13: 00000000004c532d R14: 00000000004d97a0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..
next prev parent reply other threads:[~2018-12-15 19:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-11 1:56 WARNING in ovl_instantiate syzbot
2018-12-15 19:34 ` syzbot [this message]
2018-12-16 17:00 ` Amir Goldstein
2018-12-17 10:46 ` Dmitry Vyukov
2018-12-17 13:30 ` Amir Goldstein
2018-12-18 14:12 ` Dmitry Vyukov
2019-03-26 12:10 ` syzbot
2019-04-19 8:21 ` Amir Goldstein
2019-04-19 8:52 ` syzbot
2019-04-19 8:53 ` syzbot
2019-04-22 10:12 ` Dmitry Vyukov
2019-04-22 11:08 ` Amir Goldstein
2019-04-22 11:58 ` Dmitry Vyukov
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=00000000000058055a057d14a1f4@google.com \
--to=syzbot+9c69c282adc4edd2b540@syzkaller.appspotmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-unionfs@vger.kernel.org \
--cc=miklos@szeredi.hu \
--cc=syzkaller-bugs@googlegroups.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox