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ext4: revert buggy trim overflow patch 

This reverts commit 4f531501e44: ext4: fix possible overflow in
ext4_trim_fs()

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2011-01-11 14:42:29 -05:00
parent d002ebf1d8
commit 0a2179b169
1 changed files with 0 additions and 6 deletions
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6
fs/ext4/mballoc.c
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@ -4804,7 +4804,6 @@ 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;
@ -4816,11 +4815,6 @@ 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;