Hello:
This patch was applied to netdev/net.git (main) by Paolo Abeni pabeni@redhat.com:
On Thu, 2 May 2024 10:20:06 -0300 you wrote:
net_alloc_generic is called by net_alloc, which is called without any locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It is read twice, first to allocate an array, then to set s.len, which is later used to limit the bounds of the array access.
It is possible that the array is allocated and another thread is registering a new pernet ops, increments max_gen_ptrs, which is then used to set s.len with a larger than allocated length for the variable array.
[...]
Here is the summary with links: - [net,v3] net: fix out-of-bounds access in ops_init https://git.kernel.org/netdev/net/c/a26ff37e624d
You are awesome, thank you!