Hello:

This patch was applied to netdev/net.git (main) by Paolo Abeni pabeni@redhat.com:

On Mon, 17 Jun 2024 22:02:05 +0100 you wrote:

It is possible to trigger a use-after-free by:

• attaching an fentry probe to __sock_release() and the probe calling the bpf_get_socket_cookie() helper
• running traceroute -I 1.1.1.1 on a freshly booted VM

A KASAN enabled kernel will log something like below (decoded and stripped):

BUG: KASAN: slab-use-after-free in __sock_gen_cookie (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-instrumented.h:1611 net/core/sock_diag.c:29) Read of size 8 at addr ffff888007110dd8 by task traceroute/299

[...]

Here is the summary with links: - [net,v3] net: do not leave a dangling sk pointer, when socket creation fails https://git.kernel.org/netdev/net/c/6cd4a78d962b

You are awesome, thank you!