netdev - Re: [PATCH net-next v5 1/2] ipv6: Fix signed integer overflow in __ip6_append

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Date:   Wed, 08 Jun 2022 18:30:13 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Wang Yufen <wangyufen@...wei.com>
Cc:     davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH net-next v5 1/2] ipv6: Fix signed integer overflow in
 __ip6_append_data

Hello:

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

On Tue, 7 Jun 2022 20:00:27 +0800 you wrote:
> Resurrect ubsan overflow checks and ubsan report this warning,
> fix it by change the variable [length] type to size_t.
> 
> UBSAN: signed-integer-overflow in net/ipv6/ip6_output.c:1489:19
> 2147479552 + 8567 cannot be represented in type 'int'
> CPU: 0 PID: 253 Comm: err Not tainted 5.16.0+ #1
> Hardware name: linux,dummy-virt (DT)
> Call trace:
>   dump_backtrace+0x214/0x230
>   show_stack+0x30/0x78
>   dump_stack_lvl+0xf8/0x118
>   dump_stack+0x18/0x30
>   ubsan_epilogue+0x18/0x60
>   handle_overflow+0xd0/0xf0
>   __ubsan_handle_add_overflow+0x34/0x44
>   __ip6_append_data.isra.48+0x1598/0x1688
>   ip6_append_data+0x128/0x260
>   udpv6_sendmsg+0x680/0xdd0
>   inet6_sendmsg+0x54/0x90
>   sock_sendmsg+0x70/0x88
>   ____sys_sendmsg+0xe8/0x368
>   ___sys_sendmsg+0x98/0xe0
>   __sys_sendmmsg+0xf4/0x3b8
>   __arm64_sys_sendmmsg+0x34/0x48
>   invoke_syscall+0x64/0x160
>   el0_svc_common.constprop.4+0x124/0x300
>   do_el0_svc+0x44/0xc8
>   el0_svc+0x3c/0x1e8
>   el0t_64_sync_handler+0x88/0xb0
>   el0t_64_sync+0x16c/0x170
> 
> [...]

Here is the summary with links:
  - [net-next,v5,1/2] ipv6: Fix signed integer overflow in __ip6_append_data
    https://git.kernel.org/netdev/net/c/f93431c86b63
  - [net-next,v5,2/2] ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg
    https://git.kernel.org/netdev/net/c/f638a84afef3

You are awesome, thank you!
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