Hello:
This patch was applied to netdev/net.git (master)
by David S. Miller <davem@xxxxxxxxxxxxx>:
On Sat, 26 Mar 2022 18:43:46 +0800 you wrote:
> When the link layer is terminating, x25->neighbour will be set to NULL
> in x25_disconnect(). As a result, it could cause null-ptr-deref bugs in
> x25_sendmsg(),x25_recvmsg() and x25_connect(). One of the bugs is
> shown below.
>
> (Thread 1) | (Thread 2)
> x25_link_terminated() | x25_recvmsg()
> x25_kill_by_neigh() | ...
> x25_disconnect() | lock_sock(sk)
> ... | ...
> x25->neighbour = NULL //(1) |
> ... | x25->neighbour->extended //(2)
>
> [...]
Here is the summary with links:
- [net,V2] net/x25: Fix null-ptr-deref caused by x25_disconnect
https://git.kernel.org/netdev/net/c/7781607938c8
You are awesome, thank you!
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