Re: [PATCH net] net: appletalk: fix NULL pointer dereference in aarp_send_ddp()

[patchwork-bot+netdevbpf@kernel.org]

Hello:

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

On Thu, 14 May 2026 05:38:08 -0700 you wrote:
> aarp_send_ddp() calls atalk_find_dev_addr(dev) in the LocalTalk fast
> path without checking for NULL. When the device has no AppleTalk
> interface configured (dev->atalk_ptr == NULL), this leads to a NULL
> pointer dereference at the at->s_net access.
> 
>  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
>  RIP: 0010:aarp_send_ddp (net/appletalk/aarp.c:552 (discriminator 2))
>  Call Trace:
>   <TASK>
>   atalk_sendmsg (net/appletalk/ddp.c:1715)
>   __sys_sendto (net/socket.c:2265 (discriminator 1))
>   __x64_sys_sendto (net/socket.c:2272)
>   do_syscall_64 (arch/x86/entry/syscall_64.c:94)
>   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
> 
> [...]

Here is the summary with links:
  - [net] net: appletalk: fix NULL pointer dereference in aarp_send_ddp()
    https://git.kernel.org/netdev/net/c/9e7f36ab5b7b

You are awesome, thank you!
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