From: Jeff Dike <jdike@addtoit.com>
Date: Thu, 15 Nov 2007 00:58:51 +0000 (-0800)
Subject: uml: fix recvmsg return value checking
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d4d5d205b653fe68c898d42e7a27a7363a4fb3ba;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

uml: fix recvmsg return value checking

Stupid bug - we need to compare the return value of recvmsg to the value of
iov_len, not its size.  This caused port_helper processes not to be killed on
shutdown on x86_64 because the pids weren't being passed out properly.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index b542a3a021bf..f83462758627 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -496,8 +496,7 @@ int os_rcv_fd(int fd, int *helper_pid_out)
 	n = recvmsg(fd, &msg, 0);
 	if(n < 0)
 		return -errno;
-
-	else if(n != sizeof(iov.iov_len))
+	else if(n != iov.iov_len)
 		*helper_pid_out = -1;
 
 	cmsg = CMSG_FIRSTHDR(&msg);