diff options
| author | Mateusz Guzik <mguzik@redhat.com> | 2014-01-27 17:07:11 -0800 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-02-02 15:59:24 +0100 |
| commit | 910f9e7dbee0aef348cecd53d54fb70f77e8321b (patch) | |
| tree | dfaf0d579d76e8c20ec3168fdd0e79bb00f22a98 /ipc | |
| parent | aa99e32532c37c8fb56465fe5609a343a17a2354 (diff) | |
ipc: fix compat msgrcv with negative msgtyp
commit e7ca2552369c1dfe0216c626baf82c3d83ec36bb upstream.
Compat function takes msgtyp argument as u32 and passes it down to
do_msgrcv which results in casting to long, thus the sign is lost and we
get a big positive number instead.
Cast the argument to signed type before passing it down.
Signed-off-by: Mateusz Guzik <mguzik@redhat.com>
Reported-by: Gabriellla Schmidt <gsc@bruker.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/compat.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ipc/compat.c b/ipc/compat.c index 892f6585dd60..d3b376025e9b 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -381,7 +381,7 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second, uptr = compat_ptr(ipck.msgp); fifth = ipck.msgtyp; } - return do_msgrcv(first, uptr, second, fifth, third, + return do_msgrcv(first, uptr, second, (s32)fifth, third, compat_do_msg_fill); } case MSGGET: |