The patch titled Subject: ipc: don't allocate a copy larger than max has been removed from the -mm tree. Its filename was ipc-dont-allocate-a-copy-larger-than-max.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx> Subject: ipc: don't allocate a copy larger than max When MSG_COPY is set, a duplicate message must be allocated for the copy before locking the queue. However, the copy could not be larger than was sent which is limited to msg_ctlmax. Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx> Acked-by: Stanislav Kinsbursky <skinsbursky@xxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- ipc/msg.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff -puN ipc/msg.c~ipc-dont-allocate-a-copy-larger-than-max ipc/msg.c --- a/ipc/msg.c~ipc-dont-allocate-a-copy-larger-than-max +++ a/ipc/msg.c @@ -820,15 +820,17 @@ long do_msgrcv(int msqid, void __user *b struct msg_msg *copy = NULL; unsigned long copy_number = 0; + ns = current->nsproxy->ipc_ns; + if (msqid < 0 || (long) bufsz < 0) return -EINVAL; if (msgflg & MSG_COPY) { - copy = prepare_copy(buf, bufsz, msgflg, &msgtyp, ©_number); + copy = prepare_copy(buf, min_t(size_t, bufsz, ns->msg_ctlmax), + msgflg, &msgtyp, ©_number); if (IS_ERR(copy)) return PTR_ERR(copy); } mode = convert_mode(&msgtyp, msgflg); - ns = current->nsproxy->ipc_ns; msq = msg_lock_check(ns, msqid); if (IS_ERR(msq)) { _ Patches currently in -mm which might be from peter@xxxxxxxxxxxxxxxxxx are origin.patch linux-next.patch ipc-clamp-with-min.patch ipc-separate-msg-allocation-from-userspace-copy.patch ipc-tighten-msg-copy-loops.patch ipc-set-efault-as-default-error-in-load_msg.patch ipc-remove-msg-handling-from-queue-scan.patch ipc-implement-msg_copy-as-a-new-receive-mode.patch ipc-simplify-msg-list-search.patch ipc-refactor-msg-list-search-into-separate-function.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html