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| author | Frederic Bohe <frederic.bohe@bull.net> | 2008-06-20 11:48:48 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-06-20 11:48:48 -0400 |
| commit | 2856922c158605514ec5974a03097eaec91f4c0d (patch) | |
| tree | 1b3cdadf7f4f4302d8d16eb8d310ab7811846de3 | |
| parent | 5dd34572ad9a3be430632dd42e4af2ea370b397b (diff) | |
| download | kernel-crypto-2856922c158605514ec5974a03097eaec91f4c0d.tar.gz kernel-crypto-2856922c158605514ec5974a03097eaec91f4c0d.tar.xz kernel-crypto-2856922c158605514ec5974a03097eaec91f4c0d.zip | |
Ext4: Fix online resize block group descriptor corruption
This is the patch for the group descriptor table corruption during
online resize pointed out by Theodore Tso. The problem was caused by
the fact that the ext4 group descriptor can be either 32 or 64 bytes
long. Only the 64 bytes structure was taken into account.
Signed-off-by: Frederic Bohe <frederic.bohe@bull.net>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/resize.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 9ecb92f6854..9ff7b1c0423 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -855,7 +855,8 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input) */ /* Update group descriptor block for new group */ - gdp = (struct ext4_group_desc *)primary->b_data + gdb_off; + gdp = (struct ext4_group_desc *)((char *)primary->b_data + + gdb_off * EXT4_DESC_SIZE(sb)); ext4_block_bitmap_set(sb, gdp, input->block_bitmap); /* LV FIXME */ ext4_inode_bitmap_set(sb, gdp, input->inode_bitmap); /* LV FIXME */ |