On Wed, 13 Jul 2022 12:32:04 +0600 Khalid Masum wrote: > `struct sock` has a member `sk_user_data`, which got its memory allocated > in `kcm_attach` by `kcm_psock_cache` with the size of `kcm_psock`. Which > is not enough when the member is used as `sk_psock` causing out of bound > read. > > Use `sk_psock` size to allocate memory instead for `sk_user_data`. > > Reported-by: syzbot+1fa91bcd05206ff8cbb5@xxxxxxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Khalid Masum <khalid.masum.92@xxxxxxxxx> Odd CC list, it looks like a netdev problem but netdev@ is not copied. We had an other parson looking at this on netdev. Is this happening when legit kernel socket gets mixed with BPF sockmap? Does this fix work? https://lore.kernel.org/netdev/165030056960.5073.6664402939918720250.stgit@xxxxxxxxxxxxxxxxxxxx/
