diff options
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/mballoc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 46d5414f59c1..7c603a02633e 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4819,6 +4819,7 @@ ext4_grpblk_t ext4_trim_all_free(struct super_block *sb, struct ext4_buddy *e4b, int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) { struct ext4_buddy e4b; + ext4_fsblk_t blocks_count = ext4_blocks_count(EXT4_SB(sb)->s_es); ext4_group_t first_group, last_group; ext4_group_t group, ngroups = ext4_get_groups_count(sb); ext4_grpblk_t cnt = 0, first_block, last_block; @@ -4830,6 +4831,11 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) minlen = range->minlen >> sb->s_blocksize_bits; trimmed = 0; + if (start >= blocks_count) + return -EINVAL; + if (start + len > blocks_count) + len = blocks_count - start; + if (unlikely(minlen > EXT4_BLOCKS_PER_GROUP(sb))) return -EINVAL; |