From: Jeff Dike <jdike@addtoit.com>
To: Andrew Morton <akpm@osdl.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
uml-devel <user-mode-linux-devel@lists.sourceforge.net>
Subject: [uml-devel] [PATCH 1/2] UML - Fix recvmsg return value checking
Date: Mon, 12 Nov 2007 10:45:43 -0500 [thread overview]
Message-ID: <20071112154543.GA5571@c2.user-mode-linux.org> (raw)
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>
---
arch/um/os-Linux/file.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
Index: linux-2.6/arch/um/os-Linux/file.c
===================================================================
--- linux-2.6.orig/arch/um/os-Linux/file.c 2007-11-12 10:26:26.000000000 -0500
+++ linux-2.6/arch/um/os-Linux/file.c 2007-11-12 10:32:30.000000000 -0500
@@ -496,8 +496,7 @@ int os_rcv_fd(int fd, int *helper_pid_ou
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);
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WARNING: multiple messages have this Message-ID (diff)
From: Jeff Dike <jdike@addtoit.com>
To: Andrew Morton <akpm@osdl.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
uml-devel <user-mode-linux-devel@lists.sourceforge.net>
Subject: [PATCH 1/2] UML - Fix recvmsg return value checking
Date: Mon, 12 Nov 2007 10:45:43 -0500 [thread overview]
Message-ID: <20071112154543.GA5571@c2.user-mode-linux.org> (raw)
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>
---
arch/um/os-Linux/file.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
Index: linux-2.6/arch/um/os-Linux/file.c
===================================================================
--- linux-2.6.orig/arch/um/os-Linux/file.c 2007-11-12 10:26:26.000000000 -0500
+++ linux-2.6/arch/um/os-Linux/file.c 2007-11-12 10:32:30.000000000 -0500
@@ -496,8 +496,7 @@ int os_rcv_fd(int fd, int *helper_pid_ou
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);
next reply other threads:[~2007-11-12 15:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-12 15:45 Jeff Dike [this message]
2007-11-12 15:45 ` [PATCH 1/2] UML - Fix recvmsg return value checking Jeff Dike
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