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Subject[PATCH, v2] ext2: ensure link targets are NUL-terminated
Ensure link targets are NUL-terminated, even if corrupted on-disk.

Signed-off-by: Duane Griffin <duaneg@dghda.com>
---

V2: terminate when the link is read instead of every time it is
followed, as suggested by Dave Kleikamp.

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 7658b33..9bacf35 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1286,9 +1286,10 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
else
inode->i_mapping->a_ops = &ext2_aops;
} else if (S_ISLNK(inode->i_mode)) {
- if (ext2_inode_is_fast_symlink(inode))
+ if (ext2_inode_is_fast_symlink(inode)) {
inode->i_op = &ext2_fast_symlink_inode_operations;
- else {
+ ((char *) ei->i_data)[inode->i_size] = '\0';
+ } else {
inode->i_op = &ext2_symlink_inode_operations;
if (test_opt(inode->i_sb, NOBH))
inode->i_mapping->a_ops = &ext2_nobh_aops;
--
"I never could learn to drink that blood and call it wine" - Bob Dylan

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