Subject: FAILED: patch "[PATCH] f2fs: fix listxattr handling of corrupted xattr entries" failed to apply to 6.18-stable tree
To: iganschel@gmail.com,chao@kernel.org,jaegeuk@kernel.org
Cc: <stable@vger.kernel.org>
From: <gregkh@linuxfoundation.org>
Date: Thu, 02 Jul 2026 15:12:01 +0200
Message-ID: <2026070201-elevate-aide-0fef@gregkh>
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The patch below does not apply to the 6.18-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x 5ef5bc304f23c3fe255d4936472378dcb74d0e94
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026070201-elevate-aide-0fef@gregkh' --subject-prefix 'PATCH 6.18.y' 'HEAD^..'

Possible dependencies:


thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 5ef5bc304f23c3fe255d4936472378dcb74d0e94 Mon Sep 17 00:00:00 2001
From: Keshav Verma <iganschel@gmail.com>
Date: Mon, 22 Jun 2026 20:44:21 +0530
Subject: [PATCH] f2fs: fix listxattr handling of corrupted xattr entries

Validate the xattr entry before reading its fields in f2fs_listxattr().
Return -EFSCORRUPTED when the entry is outside the valid xattr storage
area instead of returning a successful partial result.

Fixes: 688078e7f36c ("f2fs: fix to avoid memory leakage in f2fs_listxattr")
Cc: stable@kernel.org
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Keshav Verma <iganschel@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 24cef7e1f56a..ed33e5110f2a 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -583,8 +583,6 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
 		size_t prefix_len;
 		size_t size;
 
-		prefix = f2fs_xattr_prefix(entry->e_name_index, dentry);
-
 		if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
 			(void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) {
 			f2fs_err(F2FS_I_SB(inode), "list inode (%llu) has corrupted xattr",
@@ -594,9 +592,11 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
 						ERROR_CORRUPTED_XATTR);
 			fserror_report_file_metadata(inode,
 						-EFSCORRUPTED, GFP_NOFS);
-			break;
+			error = -EFSCORRUPTED;
+			goto cleanup;
 		}
 
+		prefix = f2fs_xattr_prefix(entry->e_name_index, dentry);
 		if (!prefix)
 			continue;