From: Eric Biggers <ebiggers@xxxxxxxxxx>
The ciphertext length field stored at the beginning of encrypted symlink
targets is 16-bit. But e2fsck_pass1_check_symlink() is reading it as
32-bit. This was apparently left over from an earlier on-disk format
that was not merged. Fix it.
This bug caused a small proportion of encrypted symlinks with 4092-byte
targets to be considered invalid by e2fsck, but otherwise had no effect.
Fixes: 62ad24802c6e ("e2fsck: handle encrypted directories which are indexed using htree")
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
e2fsck/pass1.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index 5015d938..b101df0a 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -249,7 +249,7 @@ int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
return 0;
if (inode->i_flags & EXT4_ENCRYPT_FL) {
- len = ext2fs_le32_to_cpu(*((__u32 *)buf)) + 4;
+ len = ext2fs_le16_to_cpu(*((__u16 *)buf)) + 2;
} else {
len = strnlen(buf, fs->blocksize);
}
--
2.16.2.395.g2e18187dfd-goog
