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| author | Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> | 2017-09-25 22:06:31 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-10-06 11:28:18 -0400 |
| commit | 385b73185596cfc9e2acb74ab66abe91c06177f3 (patch) | |
| tree | 116142f27d11cf0472d47c9db69443b567ee38ad /fs/ext4 | |
| parent | bd2259e3c40c097c47e1dfc58a03b1df66b44840 (diff) | |
fs/ext4: Fix group descriptor checksum calculation
The current code doesn't compute the group descriptor checksum correctly
for the filesystems that e2fsprogs 1.43.4 creates (they have
'Group descriptor size: 64' as reported by tune2fs). Extend the checksum
calculation to be done as ext4_group_desc_csum() does in Linux.
This fixes these errors in dmesg from running fs-test.sh and makes it
succeed again:
[1671902.620699] EXT4-fs (loop1): ext4_check_descriptors: Checksum for group 0 failed (35782!=10965)
[1671902.620706] EXT4-fs (loop1): group descriptors corrupted!
Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/ext4_common.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c index 621c61e5c7..31952f48b9 100644 --- a/fs/ext4/ext4_common.c +++ b/fs/ext4/ext4_common.c @@ -432,6 +432,10 @@ uint16_t ext4fs_checksum_update(uint32_t i) crc = ext2fs_crc16(crc, desc, offset); offset += sizeof(desc->bg_checksum); /* skip checksum */ assert(offset == sizeof(*desc)); + if (offset < fs->gdsize) { + crc = ext2fs_crc16(crc, (__u8 *)desc + offset, + fs->gdsize - offset); + } } return crc; |