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authorMateusz Guzik <mguzik@redhat.com>2014-01-27 17:07:11 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-27 21:02:40 -0800
commite7ca2552369c1dfe0216c626baf82c3d83ec36bb (patch)
treedfaa96f46b9c9cf907c41bc6c825d250a8595010 /ipc
parentffa571dafbaec0c74e374ce0ea7b4212b6cbc94c (diff)
downloadlinux-e7ca2552369c1dfe0216c626baf82c3d83ec36bb.tar.gz
ipc: fix compat msgrcv with negative msgtyp
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>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/compat.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ipc/compat.c b/ipc/compat.c
index f71e962756d..f486b0096a6 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: