linux-kernel - Re: [net PATCH] ipv4: drop dst in multicast routing path

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Date:   Fri, 06 May 2022 19:50:12 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        tgraf@...g.ch, lokesh.dhoundiyal@...iedtelesis.co.nz,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net PATCH] ipv4: drop dst in multicast routing path

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Thu,  5 May 2022 14:00:17 +1200 you wrote:
> From: Lokesh Dhoundiyal <lokesh.dhoundiyal@...iedtelesis.co.nz>
> 
> kmemleak reports the following when routing multicast traffic over an
> ipsec tunnel.
> 
> Kmemleak output:
> unreferenced object 0x8000000044bebb00 (size 256):
>   comm "softirq", pid 0, jiffies 4294985356 (age 126.810s)
>   hex dump (first 32 bytes):
>     00 00 00 00 00 00 00 00 80 00 00 00 05 13 74 80  ..............t.
>     80 00 00 00 04 9b bf f9 00 00 00 00 00 00 00 00  ................
>   backtrace:
>     [<00000000f83947e0>] __kmalloc+0x1e8/0x300
>     [<00000000b7ed8dca>] metadata_dst_alloc+0x24/0x58
>     [<0000000081d32c20>] __ipgre_rcv+0x100/0x2b8
>     [<00000000824f6cf1>] gre_rcv+0x178/0x540
>     [<00000000ccd4e162>] gre_rcv+0x7c/0xd8
>     [<00000000c024b148>] ip_protocol_deliver_rcu+0x124/0x350
>     [<000000006a483377>] ip_local_deliver_finish+0x54/0x68
>     [<00000000d9271b3a>] ip_local_deliver+0x128/0x168
>     [<00000000bd4968ae>] xfrm_trans_reinject+0xb8/0xf8
>     [<0000000071672a19>] tasklet_action_common.isra.16+0xc4/0x1b0
>     [<0000000062e9c336>] __do_softirq+0x1fc/0x3e0
>     [<00000000013d7914>] irq_exit+0xc4/0xe0
>     [<00000000a4d73e90>] plat_irq_dispatch+0x7c/0x108
>     [<000000000751eb8e>] handle_int+0x16c/0x178
>     [<000000001668023b>] _raw_spin_unlock_irqrestore+0x1c/0x28
> 
> [...]

Here is the summary with links:
  - [net] ipv4: drop dst in multicast routing path
    https://git.kernel.org/netdev/net/c/9e6c6d17d1d6

You are awesome, thank you!
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