Eric Biggers 4e765b4972 af_key: fix buffer overread in parse_exthdrs() ... If a message sent to a PF_KEY socket ended with an incomplete extension header (fewer than 4 bytes remaining), then parse_exthdrs() read past the end of the message, into uninitialized memory. Fix it by returning -EINVAL in this case. Reproducer: #include <linux/pfkeyv2.h> #include <sys/socket.h> #include <unistd.h> int main() { int sock = socket(PF_KEY, SOCK_RAW, PF_KEY_V2); char buf[17] = { 0 }; struct sadb_msg *msg = (void *)buf; msg->sadb_msg_version = PF_KEY_V2; msg->sadb_msg_type = SADB_DELETE; msg->sadb_msg_len = 2; write(sock, buf, 17); } Cc: stable@vger.kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>		2017-12-30 09:52:08 +01:00
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af_key.c	af_key: fix buffer overread in parse_exthdrs()	2017-12-30 09:52:08 +01:00
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