Messages in this thread | | | Date | Wed, 13 Jul 2022 11:16:37 -0700 | From | Jakub Kicinski <> | Subject | Re: [RFC PATCH 1/1] net: kcm: Use sk_psock size for kcm_psock_cache |
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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@syzkaller.appspotmail.com > Signed-off-by: Khalid Masum <khalid.masum.92@gmail.com>
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@oracle-102.nfsv4.dev/
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