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Prior to this patch, in rx path, before calling lock_sock, it needed to hold assoc when got it by __sctp_lookup_association, in case other place would free/put assoc. But in __sctp_lookup_association, it lookup and hold transport, then got assoc by transport->assoc, then hold assoc and put transport. It means it didn't hold transport, yet it was returned and later on directly assigned to chunk->transport. Without the protection of sock lock, the transport may be freed/put by other places, which would cause a use-after-free issue. This patch is to fix this issue by holding transport instead of assoc. As holding transport can make sure to access assoc is also safe, and actually it looks up assoc by searching transport rhashtable, to hold transport here makes more sense. Note that the function will be renamed later on on another patch. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| auth.h | ||
| checksum.h | ||
| command.h | ||
| constants.h | ||
| sctp.h | ||
| sm.h | ||
| structs.h | ||
| tsnmap.h | ||
| ulpevent.h | ||
| ulpqueue.h | ||