This is a note to let you know that I've just added the patch titled
fs/ntfs3: Fix possible NULL-ptr-deref in ni_readpage_cmpr()
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-possible-null-ptr-deref-in-ni_readpage_.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.
commit 5022470ecff3f1bc736d3606fd84fc27d163947a
Author: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Date: Tue Sep 26 11:19:08 2023 +0300
fs/ntfs3: Fix possible NULL-ptr-deref in ni_readpage_cmpr()
[ Upstream commit 32e9212256b88f35466642f9c939bb40cfb2c2de ]
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index 73a56d7ac84b7..b02778cbb1d34 100644
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -2100,7 +2100,7 @@ int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page)
for (i = 0; i < pages_per_frame; i++) {
pg = pages[i];
- if (i == idx)
+ if (i == idx || !pg)
continue;
unlock_page(pg);
put_page(pg);
