From: syzbot <syzbot+050de9f900eb45b94ef9@syzkaller.appspotmail.com>
To: coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de,
kadlec@netfilter.org, kuba@kernel.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
netfilter-devel@vger.kernel.org, pablo@netfilter.org,
syzkaller-bugs@googlegroups.com
Subject: [syzbot] memory leak in nf_hook_entries_grow (2)
Date: Mon, 03 May 2021 10:20:20 -0700 [thread overview]
Message-ID: <0000000000001d488205c1702d78@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 9ccce092 Merge tag 'for-linus-5.13-ofs-1' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=141aec93d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=5ab124e5617a0cfa
dashboard link: https://syzkaller.appspot.com/bug?extid=050de9f900eb45b94ef9
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14bd921ed00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+050de9f900eb45b94ef9@syzkaller.appspotmail.com
BUG: memory leak
unreferenced object 0xffff888128e8efc0 (size 64):
comm "syz-executor.1", pid 8445, jiffies 4294969756 (age 19.530s)
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 10 8a a5 83 ff ff ff ff ................
00 f6 f4 27 81 88 ff ff 00 40 5a 28 81 88 ff ff ...'.....@Z(....
backtrace:
[<ffffffff8146e301>] kmalloc_node include/linux/slab.h:579 [inline]
[<ffffffff8146e301>] kvmalloc_node+0x61/0xf0 mm/util.c:587
[<ffffffff8381be3b>] kvmalloc include/linux/mm.h:797 [inline]
[<ffffffff8381be3b>] kvzalloc include/linux/mm.h:805 [inline]
[<ffffffff8381be3b>] allocate_hook_entries_size net/netfilter/core.c:61 [inline]
[<ffffffff8381be3b>] nf_hook_entries_grow+0x31b/0x370 net/netfilter/core.c:128
[<ffffffff8381c19d>] __nf_register_net_hook+0x8d/0x290 net/netfilter/core.c:407
[<ffffffff8381c45f>] nf_register_net_hook+0xbf/0x100 net/netfilter/core.c:541
[<ffffffff8381c4f9>] nf_register_net_hooks+0x59/0xc0 net/netfilter/core.c:557
[<ffffffff83a56452>] arpt_register_table+0x152/0x1e0 net/ipv4/netfilter/arp_tables.c:1548
[<ffffffff83a58a7d>] arptable_filter_table_init+0x3d/0x60 net/ipv4/netfilter/arptable_filter.c:50
[<ffffffff838b85a9>] xt_find_table_lock+0x189/0x290 net/netfilter/x_tables.c:1244
[<ffffffff838b86d7>] xt_request_find_table_lock+0x27/0xb0 net/netfilter/x_tables.c:1275
[<ffffffff83a575b2>] get_info+0xd2/0x430 net/ipv4/netfilter/arp_tables.c:807
[<ffffffff83a57b34>] do_arpt_get_ctl+0x224/0x520 net/ipv4/netfilter/arp_tables.c:1443
[<ffffffff8381e3b7>] nf_getsockopt+0x57/0x80 net/netfilter/nf_sockopt.c:116
[<ffffffff83986b9a>] ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline]
[<ffffffff83986b9a>] ip_getsockopt+0xfa/0x140 net/ipv4/ip_sockglue.c:1756
[<ffffffff8399b06b>] tcp_getsockopt+0x4b/0x80 net/ipv4/tcp.c:4251
[<ffffffff8366dc23>] __sys_getsockopt+0x133/0x2f0 net/socket.c:2161
[<ffffffff8366de02>] __do_sys_getsockopt net/socket.c:2176 [inline]
[<ffffffff8366de02>] __se_sys_getsockopt net/socket.c:2173 [inline]
[<ffffffff8366de02>] __x64_sys_getsockopt+0x22/0x30 net/socket.c:2173
BUG: memory leak
unreferenced object 0xffff888128f2fb80 (size 64):
comm "syz-executor.1", pid 8445, jiffies 4294969756 (age 19.530s)
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 10 8a a5 83 ff ff ff ff ................
00 f6 f4 27 81 88 ff ff 50 40 5a 28 81 88 ff ff ...'....P@Z(....
backtrace:
[<ffffffff8146e301>] kmalloc_node include/linux/slab.h:579 [inline]
[<ffffffff8146e301>] kvmalloc_node+0x61/0xf0 mm/util.c:587
[<ffffffff8381be3b>] kvmalloc include/linux/mm.h:797 [inline]
[<ffffffff8381be3b>] kvzalloc include/linux/mm.h:805 [inline]
[<ffffffff8381be3b>] allocate_hook_entries_size net/netfilter/core.c:61 [inline]
[<ffffffff8381be3b>] nf_hook_entries_grow+0x31b/0x370 net/netfilter/core.c:128
[<ffffffff8381c19d>] __nf_register_net_hook+0x8d/0x290 net/netfilter/core.c:407
[<ffffffff8381c45f>] nf_register_net_hook+0xbf/0x100 net/netfilter/core.c:541
[<ffffffff8381c4f9>] nf_register_net_hooks+0x59/0xc0 net/netfilter/core.c:557
[<ffffffff83a56452>] arpt_register_table+0x152/0x1e0 net/ipv4/netfilter/arp_tables.c:1548
[<ffffffff83a58a7d>] arptable_filter_table_init+0x3d/0x60 net/ipv4/netfilter/arptable_filter.c:50
[<ffffffff838b85a9>] xt_find_table_lock+0x189/0x290 net/netfilter/x_tables.c:1244
[<ffffffff838b86d7>] xt_request_find_table_lock+0x27/0xb0 net/netfilter/x_tables.c:1275
[<ffffffff83a575b2>] get_info+0xd2/0x430 net/ipv4/netfilter/arp_tables.c:807
[<ffffffff83a57b34>] do_arpt_get_ctl+0x224/0x520 net/ipv4/netfilter/arp_tables.c:1443
[<ffffffff8381e3b7>] nf_getsockopt+0x57/0x80 net/netfilter/nf_sockopt.c:116
[<ffffffff83986b9a>] ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline]
[<ffffffff83986b9a>] ip_getsockopt+0xfa/0x140 net/ipv4/ip_sockglue.c:1756
[<ffffffff8399b06b>] tcp_getsockopt+0x4b/0x80 net/ipv4/tcp.c:4251
[<ffffffff8366dc23>] __sys_getsockopt+0x133/0x2f0 net/socket.c:2161
[<ffffffff8366de02>] __do_sys_getsockopt net/socket.c:2176 [inline]
[<ffffffff8366de02>] __se_sys_getsockopt net/socket.c:2173 [inline]
[<ffffffff8366de02>] __x64_sys_getsockopt+0x22/0x30 net/socket.c:2173
BUG: memory leak
unreferenced object 0xffff88812249b100 (size 64):
comm "kworker/u4:1", pid 24, jiffies 4294970575 (age 11.350s)
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 10 8a a5 83 ff ff ff ff ................
00 f6 f4 27 81 88 ff ff 28 40 5a 28 81 88 ff ff ...'....(@Z(....
backtrace:
[<ffffffff8146e301>] kmalloc_node include/linux/slab.h:579 [inline]
[<ffffffff8146e301>] kvmalloc_node+0x61/0xf0 mm/util.c:587
[<ffffffff8381b1ad>] kvmalloc include/linux/mm.h:797 [inline]
[<ffffffff8381b1ad>] kvzalloc include/linux/mm.h:805 [inline]
[<ffffffff8381b1ad>] allocate_hook_entries_size net/netfilter/core.c:61 [inline]
[<ffffffff8381b1ad>] __nf_hook_entries_try_shrink+0xfd/0x210 net/netfilter/core.c:248
[<ffffffff8381b96b>] __nf_unregister_net_hook+0x17b/0x280 net/netfilter/core.c:483
[<ffffffff8381baf2>] nf_unregister_net_hook+0x82/0xb0 net/netfilter/core.c:502
[<ffffffff8368fca1>] ops_exit_list+0x41/0x80 net/core/net_namespace.c:175
[<ffffffff83690861>] cleanup_net+0x2c1/0x4d0 net/core/net_namespace.c:595
[<ffffffff8125e109>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
[<ffffffff8125e9f9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
[<ffffffff81266268>] kthread+0x178/0x1b0 kernel/kthread.c:313
[<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2021-05-03 17:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-03 17:20 syzbot [this message]
2021-05-04 8:24 ` [syzbot] memory leak in nf_hook_entries_grow (2) syzbot
2021-05-04 8:25 ` Florian Westphal
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=0000000000001d488205c1702d78@google.com \
--to=syzbot+050de9f900eb45b94ef9@syzkaller.appspotmail.com \
--cc=coreteam@netfilter.org \
--cc=davem@davemloft.net \
--cc=fw@strlen.de \
--cc=kadlec@netfilter.org \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=pablo@netfilter.org \
--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.