This is a note to let you know that I've just added the patch titled
vfs: Return -ENXIO for negative SEEK_HOLE / SEEK_DATA offsets
to the 4.9-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-return-enxio-for-negative-seek_hole-seek_data-offsets.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fc46820b27a2d9a46f7e90c9ceb4a64a1bc5fab8 Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Date: Mon, 25 Sep 2017 12:23:03 +0200
Subject: vfs: Return -ENXIO for negative SEEK_HOLE / SEEK_DATA offsets
From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
commit fc46820b27a2d9a46f7e90c9ceb4a64a1bc5fab8 upstream.
In generic_file_llseek_size, return -ENXIO for negative offsets as well
as offsets beyond EOF. This affects filesystems which don't implement
SEEK_HOLE / SEEK_DATA internally, possibly because they don't support
holes.
Fixes xfstest generic/448.
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/read_write.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -114,7 +114,7 @@ generic_file_llseek_size(struct file *fi
* In the generic case the entire file is data, so as long as
* offset isn't at the end of the file then the offset is data.
*/
- if (offset >= eof)
+ if ((unsigned long long)offset >= eof)
return -ENXIO;
break;
case SEEK_HOLE:
@@ -122,7 +122,7 @@ generic_file_llseek_size(struct file *fi
* There is a virtual hole at the end of the file, so as long as
* offset isn't i_size or larger, return i_size.
*/
- if (offset >= eof)
+ if ((unsigned long long)offset >= eof)
return -ENXIO;
offset = eof;
break;
Patches currently in stable-queue which might be from agruenba@xxxxxxxxxx are
queue-4.9/vfs-return-enxio-for-negative-seek_hole-seek_data-offsets.patch