From: syzbot <syzbot+b4b0d1b35442afbf6fd2@syzkaller.appspotmail.com>
To: ebiederm@xmission.com, legion@kernel.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] memory leak in setup_mq_sysctls
Date: Sun, 19 Jun 2022 23:52:25 -0700 [thread overview]
Message-ID: <000000000000f5004705e1db8bad@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 979086f5e006 Merge tag 'fs.fixes.v5.19-rc3' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1284331bf00000
kernel config: https://syzkaller.appspot.com/x/.config?x=c696a83383a77f81
dashboard link: https://syzkaller.appspot.com/bug?extid=b4b0d1b35442afbf6fd2
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=163e740ff00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=132b758bf00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b4b0d1b35442afbf6fd2@syzkaller.appspotmail.com
executing program
BUG: memory leak
unreferenced object 0xffff888112fc9200 (size 512):
comm "syz-executor237", pid 3648, jiffies 4294970469 (age 12.270s)
hex dump (first 32 bytes):
ef d3 60 85 ff ff ff ff 0c 9b d2 12 81 88 ff ff ..`.............
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814b6eb3>] kmemdup+0x23/0x50 mm/util.c:129
[<ffffffff82219a9b>] kmemdup include/linux/fortify-string.h:456 [inline]
[<ffffffff82219a9b>] setup_mq_sysctls+0x4b/0x1c0 ipc/mq_sysctl.c:89
[<ffffffff822197f2>] create_ipc_ns ipc/namespace.c:63 [inline]
[<ffffffff822197f2>] copy_ipcs+0x292/0x390 ipc/namespace.c:91
[<ffffffff8127de7c>] create_new_namespaces+0xdc/0x4f0 kernel/nsproxy.c:90
[<ffffffff8127e89b>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226
[<ffffffff8123f92e>] ksys_unshare+0x2fe/0x600 kernel/fork.c:3165
[<ffffffff8123fc42>] __do_sys_unshare kernel/fork.c:3236 [inline]
[<ffffffff8123fc42>] __se_sys_unshare kernel/fork.c:3234 [inline]
[<ffffffff8123fc42>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3234
[<ffffffff845aab45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845aab45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff8460006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
BUG: memory leak
unreferenced object 0xffff888112fd5f00 (size 256):
comm "syz-executor237", pid 3648, jiffies 4294970469 (age 12.270s)
hex dump (first 32 bytes):
00 92 fc 12 81 88 ff ff 00 00 00 00 01 00 00 00 ................
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff816fea1b>] kmalloc include/linux/slab.h:605 [inline]
[<ffffffff816fea1b>] kzalloc include/linux/slab.h:733 [inline]
[<ffffffff816fea1b>] __register_sysctl_table+0x7b/0x7f0 fs/proc/proc_sysctl.c:1344
[<ffffffff82219b7a>] setup_mq_sysctls+0x12a/0x1c0 ipc/mq_sysctl.c:112
[<ffffffff822197f2>] create_ipc_ns ipc/namespace.c:63 [inline]
[<ffffffff822197f2>] copy_ipcs+0x292/0x390 ipc/namespace.c:91
[<ffffffff8127de7c>] create_new_namespaces+0xdc/0x4f0 kernel/nsproxy.c:90
[<ffffffff8127e89b>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226
[<ffffffff8123f92e>] ksys_unshare+0x2fe/0x600 kernel/fork.c:3165
[<ffffffff8123fc42>] __do_sys_unshare kernel/fork.c:3236 [inline]
[<ffffffff8123fc42>] __se_sys_unshare kernel/fork.c:3234 [inline]
[<ffffffff8123fc42>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3234
[<ffffffff845aab45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845aab45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff8460006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
BUG: memory leak
unreferenced object 0xffff888112fbba00 (size 256):
comm "syz-executor237", pid 3648, jiffies 4294970469 (age 12.270s)
hex dump (first 32 bytes):
78 ba fb 12 81 88 ff ff 00 00 00 00 01 00 00 00 x...............
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff816fef49>] kmalloc include/linux/slab.h:605 [inline]
[<ffffffff816fef49>] kzalloc include/linux/slab.h:733 [inline]
[<ffffffff816fef49>] new_dir fs/proc/proc_sysctl.c:978 [inline]
[<ffffffff816fef49>] get_subdir fs/proc/proc_sysctl.c:1022 [inline]
[<ffffffff816fef49>] __register_sysctl_table+0x5a9/0x7f0 fs/proc/proc_sysctl.c:1373
[<ffffffff82219b7a>] setup_mq_sysctls+0x12a/0x1c0 ipc/mq_sysctl.c:112
[<ffffffff822197f2>] create_ipc_ns ipc/namespace.c:63 [inline]
[<ffffffff822197f2>] copy_ipcs+0x292/0x390 ipc/namespace.c:91
[<ffffffff8127de7c>] create_new_namespaces+0xdc/0x4f0 kernel/nsproxy.c:90
[<ffffffff8127e89b>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226
[<ffffffff8123f92e>] ksys_unshare+0x2fe/0x600 kernel/fork.c:3165
[<ffffffff8123fc42>] __do_sys_unshare kernel/fork.c:3236 [inline]
[<ffffffff8123fc42>] __se_sys_unshare kernel/fork.c:3234 [inline]
[<ffffffff8123fc42>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3234
[<ffffffff845aab45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845aab45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff8460006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
BUG: memory leak
unreferenced object 0xffff888112fbb900 (size 256):
comm "syz-executor237", pid 3648, jiffies 4294970469 (age 12.270s)
hex dump (first 32 bytes):
78 b9 fb 12 81 88 ff ff 00 00 00 00 01 00 00 00 x...............
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff816fef49>] kmalloc include/linux/slab.h:605 [inline]
[<ffffffff816fef49>] kzalloc include/linux/slab.h:733 [inline]
[<ffffffff816fef49>] new_dir fs/proc/proc_sysctl.c:978 [inline]
[<ffffffff816fef49>] get_subdir fs/proc/proc_sysctl.c:1022 [inline]
[<ffffffff816fef49>] __register_sysctl_table+0x5a9/0x7f0 fs/proc/proc_sysctl.c:1373
[<ffffffff82219b7a>] setup_mq_sysctls+0x12a/0x1c0 ipc/mq_sysctl.c:112
[<ffffffff822197f2>] create_ipc_ns ipc/namespace.c:63 [inline]
[<ffffffff822197f2>] copy_ipcs+0x292/0x390 ipc/namespace.c:91
[<ffffffff8127de7c>] create_new_namespaces+0xdc/0x4f0 kernel/nsproxy.c:90
[<ffffffff8127e89b>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226
[<ffffffff8123f92e>] ksys_unshare+0x2fe/0x600 kernel/fork.c:3165
[<ffffffff8123fc42>] __do_sys_unshare kernel/fork.c:3236 [inline]
[<ffffffff8123fc42>] __se_sys_unshare kernel/fork.c:3234 [inline]
[<ffffffff8123fc42>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3234
[<ffffffff845aab45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845aab45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff8460006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
---
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:[~2022-06-20 6:52 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-20 6:52 syzbot [this message]
2022-06-21 9:54 ` [syzbot] memory leak in setup_mq_sysctls Alexey Gladkov
2022-06-21 14:30 ` Eric W. Biederman
2022-06-21 22:41 ` Alexey Gladkov
2022-06-22 7:39 ` Dmitry Vyukov
2022-06-22 17:16 ` Catalin Marinas
2022-06-22 20:07 ` [PATCH] ipc: Free mq_sysctls if ipc namespace creation failed Alexey Gladkov
2022-06-22 22:55 ` Eric W. Biederman
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=000000000000f5004705e1db8bad@google.com \
--to=syzbot+b4b0d1b35442afbf6fd2@syzkaller.appspotmail.com \
--cc=ebiederm@xmission.com \
--cc=legion@kernel.org \
--cc=linux-kernel@vger.kernel.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.