linux-kernel - Re: [PATCH net v2] kcm: Fix memory leak in error path of kcm

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Date:   Mon, 11 Sep 2023 09:25:42 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Shigeru Yoshida <syoshida@...hat.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        syzbot+6f98de741f7dbbfc4ccb@...kaller.appspotmail.com
Subject: Re: [PATCH net v2] kcm: Fix memory leak in error path of kcm_sendmsg()

Hello:

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

On Sun, 10 Sep 2023 02:03:10 +0900 you wrote:
> syzbot reported a memory leak like below:
> 
> BUG: memory leak
> unreferenced object 0xffff88810b088c00 (size 240):
>   comm "syz-executor186", pid 5012, jiffies 4294943306 (age 13.680s)
>   hex dump (first 32 bytes):
>     00 89 08 0b 81 88 ff ff 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:
>     [<ffffffff83e5d5ff>] __alloc_skb+0x1ef/0x230 net/core/skbuff.c:634
>     [<ffffffff84606e59>] alloc_skb include/linux/skbuff.h:1289 [inline]
>     [<ffffffff84606e59>] kcm_sendmsg+0x269/0x1050 net/kcm/kcmsock.c:815
>     [<ffffffff83e479c6>] sock_sendmsg_nosec net/socket.c:725 [inline]
>     [<ffffffff83e479c6>] sock_sendmsg+0x56/0xb0 net/socket.c:748
>     [<ffffffff83e47f55>] ____sys_sendmsg+0x365/0x470 net/socket.c:2494
>     [<ffffffff83e4c389>] ___sys_sendmsg+0xc9/0x130 net/socket.c:2548
>     [<ffffffff83e4c536>] __sys_sendmsg+0xa6/0x120 net/socket.c:2577
>     [<ffffffff84ad7bb8>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff84ad7bb8>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> [...]

Here is the summary with links:
  - [net,v2] kcm: Fix memory leak in error path of kcm_sendmsg()
    https://git.kernel.org/netdev/net/c/c821a88bd720

You are awesome, thank you!
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