This is a note to let you know that I've just added the patch titled
fs/ntfs3: Fix attr_punch_hole() null pointer derenference
to the 5.15-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:
fs-ntfs3-fix-attr_punch_hole-null-pointer-derenference.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6d5c9e79b726cc473d40e9cb60976dbe8e669624 Mon Sep 17 00:00:00 2001
From: Alon Zahavi <zahavi.alon@xxxxxxxxx>
Date: Mon, 15 Aug 2022 14:07:12 +0300
Subject: fs/ntfs3: Fix attr_punch_hole() null pointer derenference
From: Alon Zahavi <zahavi.alon@xxxxxxxxx>
commit 6d5c9e79b726cc473d40e9cb60976dbe8e669624 upstream.
The bug occours due to a misuse of `attr` variable instead of `attr_b`.
`attr` is being initialized as NULL, then being derenfernced
as `attr->res.data_size`.
This bug causes a crash of the ntfs3 driver itself,
If compiled directly to the kernel, it crashes the whole system.
Signed-off-by: Alon Zahavi <zahavi.alon@xxxxxxxxx>
Co-developed-by: Tal Lossos <tallossos@xxxxxxxxx>
Signed-off-by: Tal Lossos <tallossos@xxxxxxxxx>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ntfs3/attrib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/ntfs3/attrib.c
+++ b/fs/ntfs3/attrib.c
@@ -1967,7 +1967,7 @@ int attr_punch_hole(struct ntfs_inode *n
return -ENOENT;
if (!attr_b->non_res) {
- u32 data_size = le32_to_cpu(attr->res.data_size);
+ u32 data_size = le32_to_cpu(attr_b->res.data_size);
u32 from, to;
if (vbo > data_size)
Patches currently in stable-queue which might be from zahavi.alon@xxxxxxxxx are
queue-5.15/fs-ntfs3-fix-attr_punch_hole-null-pointer-derenference.patch
