From: syzbot <syzbot+1c6756baf4b16b94d2a6@syzkaller.appspotmail.com>
To: deepa.kernel@gmail.com, jack@suse.cz, jeffm@suse.com,
jlayton@kernel.org, linux-kernel@vger.kernel.org,
reiserfs-devel@vger.kernel.org, syzkaller-bugs@googlegroups.com,
viro@zeniv.linux.org.uk
Subject: memory leak in reiserfs_fill_super
Date: Wed, 11 Dec 2019 17:25:08 -0800 [thread overview]
Message-ID: <000000000000ab22f20599779d25@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 6794862a Merge tag 'for-5.5-rc1-kconfig-tag' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1158c12ee00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bbf3a35184a3ed64
dashboard link: https://syzkaller.appspot.com/bug?extid=1c6756baf4b16b94d2a6
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=165a64fae00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12083661e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+1c6756baf4b16b94d2a6@syzkaller.appspotmail.com
BUG: memory leak
unreferenced object 0xffff88811ff310c0 (size 32):
comm "syz-executor671", pid 7128, jiffies 4294943335 (age 13.580s)
hex dump (first 32 bytes):
2e 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
01 00 00 00 01 00 00 00 18 00 00 00 00 00 00 00 ................
backtrace:
[<000000004089eb3d>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<000000004089eb3d>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<000000004089eb3d>] slab_alloc mm/slab.c:3320 [inline]
[<000000004089eb3d>] __do_kmalloc mm/slab.c:3654 [inline]
[<000000004089eb3d>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3671
[<000000008421832f>] kstrdup+0x3a/0x70 mm/util.c:60
[<0000000043bf75e5>] reiserfs_fill_super+0x500/0x1120
fs/reiserfs/super.c:1946
[<000000009cbc0e69>] mount_bdev+0x1ce/0x210 fs/super.c:1415
[<00000000934dd7f3>] get_super_block+0x35/0x40 fs/reiserfs/super.c:2604
[<00000000cf77f9c8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000000d70f443>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<00000000be5ed892>] do_new_mount fs/namespace.c:2822 [inline]
[<00000000be5ed892>] do_mount+0x97c/0xc80 fs/namespace.c:3142
[<00000000f546ac03>] ksys_mount+0xab/0x120 fs/namespace.c:3351
[<000000005818601f>] __do_sys_mount fs/namespace.c:3365 [inline]
[<000000005818601f>] __se_sys_mount fs/namespace.c:3362 [inline]
[<000000005818601f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3362
[<00000000a358ffb7>] do_syscall_64+0x73/0x220
arch/x86/entry/common.c:294
[<00000000cb1c9cc8>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881232e08e0 (size 32):
comm "syz-executor671", pid 7135, jiffies 4294943878 (age 8.150s)
hex dump (first 32 bytes):
2e 00 63 75 72 69 74 79 2e 73 65 6c 69 6e 75 78 ..curity.selinux
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<000000004089eb3d>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<000000004089eb3d>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<000000004089eb3d>] slab_alloc mm/slab.c:3320 [inline]
[<000000004089eb3d>] __do_kmalloc mm/slab.c:3654 [inline]
[<000000004089eb3d>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3671
[<000000008421832f>] kstrdup+0x3a/0x70 mm/util.c:60
[<0000000043bf75e5>] reiserfs_fill_super+0x500/0x1120
fs/reiserfs/super.c:1946
[<000000009cbc0e69>] mount_bdev+0x1ce/0x210 fs/super.c:1415
[<00000000934dd7f3>] get_super_block+0x35/0x40 fs/reiserfs/super.c:2604
[<00000000cf77f9c8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000000d70f443>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<00000000be5ed892>] do_new_mount fs/namespace.c:2822 [inline]
[<00000000be5ed892>] do_mount+0x97c/0xc80 fs/namespace.c:3142
[<00000000f546ac03>] ksys_mount+0xab/0x120 fs/namespace.c:3351
[<000000005818601f>] __do_sys_mount fs/namespace.c:3365 [inline]
[<000000005818601f>] __se_sys_mount fs/namespace.c:3362 [inline]
[<000000005818601f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3362
[<00000000a358ffb7>] do_syscall_64+0x73/0x220
arch/x86/entry/common.c:294
[<00000000cb1c9cc8>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
---
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:[~2019-12-12 1:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-12 1:25 syzbot [this message]
2019-12-14 23:12 ` [PATCH] Re: memory leak in reiserfs_fill_super Randy Dunlap
2019-12-16 11:57 ` Jan Kara
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=000000000000ab22f20599779d25@google.com \
--to=syzbot+1c6756baf4b16b94d2a6@syzkaller.appspotmail.com \
--cc=deepa.kernel@gmail.com \
--cc=jack@suse.cz \
--cc=jeffm@suse.com \
--cc=jlayton@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=reiserfs-devel@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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).