3.6.11.9-rc1 stable review patch. If anyone has any objections, please let me know. ------------------ From: "J. Bruce Fields" [ Upstream commit cf3aa02cb4a0c5af5557dd47f15a08a7df33182a ] If we detect that an rpc is too short, we abort and close the connection. Except, there's a bug here: we're leaving sk_datalen nonzero without leaving any pages in the sk_pages array. The most likely result of the inconsistency is a subsequent crash in svc_tcp_clear_pages. Also demote the BUG_ON in svc_tcp_clear_pages to a WARN. Cc: stable@kernel.org Signed-off-by: J. Bruce Fields Signed-off-by: Steven Rostedt --- net/sunrpc/svcsock.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 998aa8c..da0980a 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -963,7 +963,10 @@ static void svc_tcp_clear_pages(struct svc_sock *svsk) len = svsk->sk_tcplen - sizeof(rpc_fraghdr); npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; for (i = 0; i < npages; i++) { - BUG_ON(svsk->sk_pages[i] == NULL); + if (svsk->sk_pages[i] == NULL) { + WARN_ON_ONCE(1); + continue; + } put_page(svsk->sk_pages[i]); svsk->sk_pages[i] = NULL; } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/