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authorPeter Hurley <peter@hurleysoftware.com>2013-03-08 12:43:26 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-14 11:26:24 -0700
commit32b25b63c222ff910834d577a6baa1f5a39b0a06 (patch)
tree9e82ca955359f7bad6a4796decd8ab0a56f38164 /ipc
parentaaf4a8519e2582203e6de1f2e2b21954c68dca7a (diff)
ipc: fix potential oops when src msg > 4k w/ MSG_COPY
commit e1082f45f1e2bbf6e25f6b614fc6616ebf709d19 upstream. If the src msg is > 4k, then dest->next points to the next allocated segment; resetting it just prior to dereferencing is bad. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/msgutil.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index ebfcbfa8b7f2..5df8e4bf1db0 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -117,9 +117,6 @@ struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst)
if (alen > DATALEN_MSG)
alen = DATALEN_MSG;
- dst->next = NULL;
- dst->security = NULL;
-
memcpy(dst + 1, src + 1, alen);
len -= alen;