| author | Stanislav Kinsbursky <skinsbursky@parallels.com> | |
| Mon, 1 Apr 2013 07:40:51 +0000 (11:40 +0400) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Wed, 17 Apr 2013 04:48:28 +0000 (21:48 -0700) | ||
| commit | fccf4d03235294c978b2390a9ce575b33b0fbe5a | |
| tree | 5fcae6208d44d1936a8227fa4b17fab89cc1cd06 | tree | snapshot (tar.xz tar.gz zip) |
| parent | 95ffc2b9c20c201cead468e1fe185b8c11f9a55b | commit | diff |
ipc: set msg back to -EAGAIN if copy wasn't performed
commit 2dc958fa2fe6987e7ab106bd97029a09a82fcd8d upstream.
Make sure that msg pointer is set back to error value in case of
MSG_COPY flag is set and desired message to copy wasn't found. This
garantees that msg is either a error pointer or a copy address.
Otherwise the last message in queue will be freed without unlinking from
the queue (which leads to memory corruption) and the dummy allocated
copy won't be released.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 2dc958fa2fe6987e7ab106bd97029a09a82fcd8d upstream.
Make sure that msg pointer is set back to error value in case of
MSG_COPY flag is set and desired message to copy wasn't found. This
garantees that msg is either a error pointer or a copy address.
Otherwise the last message in queue will be freed without unlinking from
the queue (which leads to memory corruption) and the dummy allocated
copy won't be released.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| ipc/msg.c | diff | blob | history |