On Thu, 28 Sep 2017, Eric Biggers wrote: > From: Eric Biggers <[email protected]> > > digsig_verify() requests a user key, then accesses its payload. > However, a revoked key has a NULL payload, and we failed to check for > this. request_key() *does* skip revoked keys, but there is still a > window where the key can be revoked before we acquire its semaphore. > > Fix it by checking for a NULL payload, treating it like a key which was > already revoked at the time it was requested. > > Fixes: 051dbb918c7f ("crypto: digital signature verification support") > Cc: <[email protected]> [v3.3+] > Signed-off-by: Eric Biggers <[email protected]>
Reviewed-by: James Morris <[email protected]> -- James Morris <[email protected]> -- Linux-cachefs mailing list [email protected] https://www.redhat.com/mailman/listinfo/linux-cachefs
