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| author | Theodore Ts'o <tytso@mit.edu> | 2023-02-01 10:47:47 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2023-02-01 10:47:47 -0500 |
| commit | af37d677e507a97f4ade39b247cf7ff26d9e0624 (patch) | |
| tree | 2019db6e495c21242dc5033978e1baa68bd8f97e | |
| parent | 0bc1e30fcd5fb174d029f2b52921f9138e0efb33 (diff) | |
| download | e2fsprogs-af37d677e507a97f4ade39b247cf7ff26d9e0624.tar.gz | |
libext2fs: reject opening a file system where the blocks per group < 8
A file system where the superblock claims that the blocks per group is
less than 8 is invalid, so let's reject it at ext2fs_open() time.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | lib/ext2fs/openfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c index fea352f5..fd56a9ac 100644 --- a/lib/ext2fs/openfs.c +++ b/lib/ext2fs/openfs.c @@ -385,7 +385,7 @@ retry: * Read group descriptors */ blocks_per_group = EXT2_BLOCKS_PER_GROUP(fs->super); - if (blocks_per_group == 0 || + if (blocks_per_group < 8 || blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(fs->super) || fs->inode_blocks_per_group > EXT2_MAX_INODES_PER_GROUP(fs->super) || EXT2_DESC_PER_BLOCK(fs->super) == 0 || |