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authorWouter van Kesteren <woutershep@gmail.com>2016-02-17 00:20:59 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2016-02-20 08:15:50 +0300
commit2feb55f89096b22e2de066e411a3263647211987 (patch)
tree44b6c6e9b75c40dace87ea10956ad2b692449fe5 /fs/read_write.c
parent18558cae0272f8fd9647e69d3fec1565a7949865 (diff)
downloadlinux-2feb55f89096b22e2de066e411a3263647211987.tar.xz
fs: allow no_seek_end_llseek to actually seek
The user-visible impact of the issue is for example that without this patch sensors-detect breaks when trying to seek in /dev/cpu/0/cpuid. '~0ULL' is a 'unsigned long long' that when converted to a loff_t, which is signed, gets turned into -1. later in vfs_setpos we have 'if (offset > maxsize)', which makes it always return EINVAL. Fixes: b25472f9b961 ("new helpers: no_seek_end_llseek{,_size}()") Signed-off-by: Wouter van Kesteren <woutershep@gmail.com> Reviewed-by: Andreas Dilger <adilger@dilger.ca> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 324ec271cc4e..0c8782aa3d71 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -17,6 +17,7 @@
#include <linux/splice.h>
#include <linux/compat.h>
#include <linux/mount.h>
+#include <linux/fs.h>
#include "internal.h"
#include <asm/uaccess.h>
@@ -183,7 +184,7 @@ loff_t no_seek_end_llseek(struct file *file, loff_t offset, int whence)
switch (whence) {
case SEEK_SET: case SEEK_CUR:
return generic_file_llseek_size(file, offset, whence,
- ~0ULL, 0);
+ OFFSET_MAX, 0);
default:
return -EINVAL;
}