This is a note to let you know that I've just added the patch titled
vfs: missed source of ->f_pos races
to the 3.4-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:
vfs-missed-source-of-f_pos-races.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 0e665d5d1125f9f4ccff56a75e814f10f88861a2 Mon Sep 17 00:00:00 2001
From: Al Viro <[email protected]>
Date: Mon, 20 Aug 2012 15:28:00 +0100
Subject: vfs: missed source of ->f_pos races
From: Al Viro <[email protected]>
commit 0e665d5d1125f9f4ccff56a75e814f10f88861a2 upstream.
compat_sys_{read,write}v() need the same "pass a copy of file->f_pos" thing
as sys_{read,write}{,v}().
Signed-off-by: Al Viro <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/compat.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1160,11 +1160,14 @@ compat_sys_readv(unsigned long fd, const
struct file *file;
int fput_needed;
ssize_t ret;
+ loff_t pos;
file = fget_light(fd, &fput_needed);
if (!file)
return -EBADF;
- ret = compat_readv(file, vec, vlen, &file->f_pos);
+ pos = file->f_pos;
+ ret = compat_readv(file, vec, vlen, &pos);
+ file->f_pos = pos;
fput_light(file, fput_needed);
return ret;
}
@@ -1226,11 +1229,14 @@ compat_sys_writev(unsigned long fd, cons
struct file *file;
int fput_needed;
ssize_t ret;
+ loff_t pos;
file = fget_light(fd, &fput_needed);
if (!file)
return -EBADF;
- ret = compat_writev(file, vec, vlen, &file->f_pos);
+ pos = file->f_pos;
+ ret = compat_writev(file, vec, vlen, &pos);
+ file->f_pos = pos;
fput_light(file, fput_needed);
return ret;
}
Patches currently in stable-queue which might be from [email protected]
are
queue-3.4/vfs-missed-source-of-f_pos-races.patch
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