From: syzbot <syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com>
To: adrian.hunter@intel.com, dedekind1@gmail.com,
linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org,
richard@nod.at, syzkaller-bugs@googlegroups.com
Subject: general protection fault in ubifs_mount
Date: Mon, 03 Sep 2018 13:21:02 -0700 [thread overview]
Message-ID: <000000000000b9d0190574fd4752@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 3d18c2437944 Add linux-next specific files for 20180830
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1318892e400000
kernel config: https://syzkaller.appspot.com/x/.config?x=a059d319ef7d83f6
dashboard link: https://syzkaller.appspot.com/bug?extid=38bd0f7865e5c6379280
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1720651e400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=109f4cb2400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 0 PID: 4750 Comm: syz-executor794 Not tainted
4.19.0-rc1-next-20180830+ #52
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:open_ubi fs/ubifs/super.c:1964 [inline]
RIP: 0010:ubifs_mount+0x1a0/0x66f0 fs/ubifs/super.c:2152
Code: 49 89 c7 48 89 c6 e8 5f 10 0f ff 49 81 ff 00 f0 ff ff 0f 86 91 03 00
00 e8 1d 0f 0f ff 48 89 d8 48 89 da 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28
38 d0 7f 08 84 c0 0f 85 1e 19 00 00 44 0f b6 2b bf
RSP: 0018:ffff8801d8637660 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff826db8c1
RDX: 0000000000000000 RSI: ffffffff826db8d3 RDI: 0000000000000007
RBP: ffff8801d8637b88 R08: ffff8801d876c680 R09: ffffed003b6046de
R10: ffffed003b6046de R11: ffff8801db0236f3 R12: ffff8801d8637b60
R13: dffffc0000000000 R14: ffff8801cae55948 R15: ffffffffffffffea
FS: 00000000016fa880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 00000001b4516000 CR4: 00000000001406f0
Call Trace:
legacy_get_tree+0x131/0x460 fs/fs_context.c:732
vfs_get_tree+0x1cb/0x5c0 fs/super.c:1746
do_new_mount fs/namespace.c:2627 [inline]
do_mount+0x6f9/0x1e30 fs/namespace.c:2951
ksys_mount+0x12d/0x140 fs/namespace.c:3167
__do_sys_mount fs/namespace.c:3181 [inline]
__se_sys_mount fs/namespace.c:3178 [inline]
__x64_sys_mount+0xbe/0x150 fs/namespace.c:3178
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440029
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff912a7cb8 EFLAGS: 00000207 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029
RDX: 0000000020000040 RSI: 0000000020d78000 RDI: 0000000020fb6000
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000207 R12: 00000000004018b0
R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
(ftrace buffer empty)
---[ end trace 9dcb736f966f3063 ]---
RIP: 0010:open_ubi fs/ubifs/super.c:1964 [inline]
RIP: 0010:ubifs_mount+0x1a0/0x66f0 fs/ubifs/super.c:2152
Code: 49 89 c7 48 89 c6 e8 5f 10 0f ff 49 81 ff 00 f0 ff ff 0f 86 91 03 00
00 e8 1d 0f 0f ff 48 89 d8 48 89 da 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28
38 d0 7f 08 84 c0 0f 85 1e 19 00 00 44 0f b6 2b bf
RSP: 0018:ffff8801d8637660 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff826db8c1
RDX: 0000000000000000 RSI: ffffffff826db8d3 RDI: 0000000000000007
RBP: ffff8801d8637b88 R08: ffff8801d876c680 R09: ffffed003b6046de
R10: ffffed003b6046de R11: ffff8801db0236f3 R12: ffff8801d8637b60
R13: dffffc0000000000 R14: ffff8801cae55948 R15: ffffffffffffffea
FS: 00000000016fa880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 00000001b4516000 CR4: 00000000001406f0
---
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#bug-status-tracking for how to communicate with
syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
reply other threads:[~2018-09-03 20:21 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=000000000000b9d0190574fd4752@google.com \
--to=syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com \
--cc=adrian.hunter@intel.com \
--cc=dedekind1@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mtd@lists.infradead.org \
--cc=richard@nod.at \
--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 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.