[PATCH 6.1 101/127] fs/ntfs3: Use __GFP_NOWARN allocation at ntfs_load_attr_list()

Greg Kroah-Hartman
2023-08-09T10:56:42Z

From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>

commit ea303f72d70ce2f0b0aa94ab127085289768c5a6 upstream.

syzbot is reporting too large allocation at ntfs_load_attr_list(), for
a crafted filesystem can have huge data_size.

Reported-by: syzbot <syzbot+89dbb3a789a5b9711793@syzkaller.appspotmail.com>
Link: https://syzkaller.appspot.com/bug?extid=89dbb3a789a5b9711793
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/ntfs3/attrlist.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/ntfs3/attrlist.c
+++ b/fs/ntfs3/attrlist.c
@@ -52,7 +52,7 @@ int ntfs_load_attr_list(struct ntfs_inod

if (!attr->non_res) {
lsize = le32_to_cpu(attr->res.data_size);
- le = kmalloc(al_aligned(lsize), GFP_NOFS);
+ le = kmalloc(al_aligned(lsize), GFP_NOFS | __GFP_NOWARN);
if (!le) {
err = -ENOMEM;
goto out;
@@ -80,7 +80,7 @@ int ntfs_load_attr_list(struct ntfs_inod
if (err < 0)
goto out;

- le = kmalloc(al_aligned(lsize), GFP_NOFS);
+ le = kmalloc(al_aligned(lsize), GFP_NOFS | __GFP_NOWARN);
if (!le) {
err = -ENOMEM;
goto out;