linux-ext4 - [PATCH 7/9] ext2: Remove GFP_NOFS use in ext2_xattr_cache

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Tue, 23 Jan 2024 16:25:06 +0100
From: Jan Kara <jack@...e.cz>
To: <linux-fsdevel@...r.kernel.org>
Cc: <linux-ext4@...r.kernel.org>,
	Matthew Wilcox <willy@...radead.org>,
	Jan Kara <jack@...e.cz>
Subject: [PATCH 7/9] ext2: Remove GFP_NOFS use in ext2_xattr_cache_insert()

ext2_xattr_cache_insert() calls mb_cache_entry_create() with GFP_NOFS
because it is called under EXT2_I(inode)->xattr_sem. However xattr_sem
or any higher ranking lock is not acquired on fs reclaim path for ext2
at least since we don't do page writeback from direct reclaim.  Thus
GFP_NOFS is not needed.

Signed-off-by: Jan Kara <jack@...e.cz>
---
 fs/ext2/xattr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index e849241ebb8f..c885dcc3bd0d 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -874,7 +874,7 @@ ext2_xattr_cache_insert(struct mb_cache *cache, struct buffer_head *bh)
 	__u32 hash = le32_to_cpu(HDR(bh)->h_hash);
 	int error;
 
-	error = mb_cache_entry_create(cache, GFP_NOFS, hash, bh->b_blocknr,
+	error = mb_cache_entry_create(cache, GFP_KERNEL, hash, bh->b_blocknr,
 				      true);
 	if (error) {
 		if (error == -EBUSY) {
-- 
2.35.3