Re: [PATCH net] icmp: fix NULL pointer dereference in icmp_tag_validation()

[patchwork-bot+netdevbpf]

Hello:

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

On Wed, 18 Mar 2026 21:06:01 +0800 you wrote:
> From: Weiming Shi <bestswngs@xxxxxxxxx>
> 
> icmp_tag_validation() unconditionally dereferences the result of
> rcu_dereference(inet_protos[proto]) without checking for NULL.
> The inet_protos[] array is sparse -- only about 15 of 256 protocol
> numbers have registered handlers. When ip_no_pmtu_disc is set to 3
> (hardened PMTU mode) and the kernel receives an ICMP Fragmentation
> Needed error with a quoted inner IP header containing an unregistered
> protocol number, the NULL dereference causes a kernel panic in
> softirq context.
> 
> [...]

Here is the summary with links:
  - [net] icmp: fix NULL pointer dereference in icmp_tag_validation()
    https://git.kernel.org/netdev/net/c/614aefe56af8

You are awesome, thank you!
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