Messages in this thread Patch in this message | | | From | Mateusz Guzik <> | Subject | [PATCH] ipc: fix compat msgrcv with negative msgtyp | Date | Wed, 15 Jan 2014 14:52:12 +0100 |
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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> --- ipc/compat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/ipc/compat.c b/ipc/compat.c index 892f658..d3b3760 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: -- 1.8.3.1
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