linux-kernel - Re: [PATCH v4] net: sched: fix memory leak in tcindex_set

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Date:   Mon, 26 Dec 2022 09:00:15 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Hawkins Jiawei <yin31149@...il.com>
Cc:     jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, 18801353760@....com, cong.wang@...edance.com,
        dvyukov@...gle.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org,
        syzbot+232ebdbd36706c965ebf@...kaller.appspotmail.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: [PATCH v4] net: sched: fix memory leak in tcindex_set_parms

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@...emloft.net>:

On Thu, 22 Dec 2022 11:51:19 +0800 you wrote:
> Syzkaller reports a memory leak as follows:
> ====================================
> BUG: memory leak
> unreferenced object 0xffff88810c287f00 (size 256):
>   comm "syz-executor105", pid 3600, jiffies 4294943292 (age 12.990s)
>   hex dump (first 32 bytes):
>     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>   backtrace:
>     [<ffffffff814cf9f0>] kmalloc_trace+0x20/0x90 mm/slab_common.c:1046
>     [<ffffffff839c9e07>] kmalloc include/linux/slab.h:576 [inline]
>     [<ffffffff839c9e07>] kmalloc_array include/linux/slab.h:627 [inline]
>     [<ffffffff839c9e07>] kcalloc include/linux/slab.h:659 [inline]
>     [<ffffffff839c9e07>] tcf_exts_init include/net/pkt_cls.h:250 [inline]
>     [<ffffffff839c9e07>] tcindex_set_parms+0xa7/0xbe0 net/sched/cls_tcindex.c:342
>     [<ffffffff839caa1f>] tcindex_change+0xdf/0x120 net/sched/cls_tcindex.c:553
>     [<ffffffff8394db62>] tc_new_tfilter+0x4f2/0x1100 net/sched/cls_api.c:2147
>     [<ffffffff8389e91c>] rtnetlink_rcv_msg+0x4dc/0x5d0 net/core/rtnetlink.c:6082
>     [<ffffffff839eba67>] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2540
>     [<ffffffff839eab87>] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
>     [<ffffffff839eab87>] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345
>     [<ffffffff839eb046>] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921
>     [<ffffffff8383e796>] sock_sendmsg_nosec net/socket.c:714 [inline]
>     [<ffffffff8383e796>] sock_sendmsg+0x56/0x80 net/socket.c:734
>     [<ffffffff8383eb08>] ____sys_sendmsg+0x178/0x410 net/socket.c:2482
>     [<ffffffff83843678>] ___sys_sendmsg+0xa8/0x110 net/socket.c:2536
>     [<ffffffff838439c5>] __sys_sendmmsg+0x105/0x330 net/socket.c:2622
>     [<ffffffff83843c14>] __do_sys_sendmmsg net/socket.c:2651 [inline]
>     [<ffffffff83843c14>] __se_sys_sendmmsg net/socket.c:2648 [inline]
>     [<ffffffff83843c14>] __x64_sys_sendmmsg+0x24/0x30 net/socket.c:2648
>     [<ffffffff84605fd5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff84605fd5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> ====================================
> 
> [...]

Here is the summary with links:
  - [v4] net: sched: fix memory leak in tcindex_set_parms
    https://git.kernel.org/netdev/net/c/399ab7fe0fa0

You are awesome, thank you!
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