From: Darrick J. Wong <djwong@kernel.org>
Date: Fri, 12 Sep 2025 22:26:01 +0000 (-0700)
Subject: fuse2fs: check free space when creating a symlink
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ebaa6cd230888d048fed8a4ada7bb54cf1b0f222;p=thirdparty%2Fe2fsprogs.git

fuse2fs: check free space when creating a symlink

Make sure we have enough space to create the symlink and its remote
block.

Cc: <linux-ext4@vger.kernel.org> # v1.43
Fixes: 81cbf1ef4f5dab ("misc: add fuse2fs, a FUSE server for e2fsprogs")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
---

diff --git a/misc/fuse2fs.c b/misc/fuse2fs.c
index 68644664..210807ea 100644
--- a/misc/fuse2fs.c
+++ b/misc/fuse2fs.c
@@ -1825,6 +1825,10 @@ static int op_symlink(const char *src, const char *dest)
 	*node_name = 0;
 
 	pthread_mutex_lock(&ff->bfl);
+	if (!fs_can_allocate(ff, 1)) {
+		ret = -ENOSPC;
+		goto out2;
+	}
 	err = ext2fs_namei(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, temp_path,
 			   &parent);
 	*node_name = a;