This is a note to let you know that I've just added the patch titled
ipc: fix compat msgrcv with negative msgtyp
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ipc-fix-compat-msgrcv-with-negative-msgtyp.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e7ca2552369c1dfe0216c626baf82c3d83ec36bb Mon Sep 17 00:00:00 2001
From: Mateusz Guzik <mguzik@xxxxxxxxxx>
Date: Mon, 27 Jan 2014 17:07:11 -0800
Subject: ipc: fix compat msgrcv with negative msgtyp
From: Mateusz Guzik <mguzik@xxxxxxxxxx>
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@xxxxxxxxxx>
Reported-by: Gabriellla Schmidt <gsc@xxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Davidlohr Bueso <davidlohr@xxxxxx>
Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Masanari Iida <standby24x7@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
ipc/compat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -381,7 +381,7 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, i
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:
Patches currently in stable-queue which might be from mguzik@xxxxxxxxxx are
queue-3.10/ipc-fix-compat-msgrcv-with-negative-msgtyp.patch
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