| Message ID | 1232659946-10073-2-git-send-email-tytso@mit.edu |
|---|---|
| State | Accepted, archived |
| Headers | show |
diff --git a/lib/ext2fs/alloc.c b/lib/ext2fs/alloc.c index be2b56b..ade5149 100644 --- a/lib/ext2fs/alloc.c +++ b/lib/ext2fs/alloc.c @@ -120,6 +120,8 @@ errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, start_inode = (dir_group * EXT2_INODES_PER_GROUP(fs->super)) + 1; if (start_inode < EXT2_FIRST_INODE(fs->super)) start_inode = EXT2_FIRST_INODE(fs->super); + if (start_inode > fs->super->s_inodes_count) + return EXT2_ET_INODE_ALLOC_FAIL; i = start_inode; do {
Add a sanity check to makesure that even if the superblock field s_first_inode is insane, that we won't return an invalid inode number. (The function will return the error EXT2_ET_INODE_ALLOC_FAIL in that case.) Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> --- lib/ext2fs/alloc.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)