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| author | Theodore Ts'o <tytso@mit.edu> | 2019-05-15 00:51:19 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-05-15 00:51:19 -0400 |
| commit | 170417c8c7bb2cbbdd949bf5c443c0c8f24a203b (patch) | |
| tree | 70dcb3c3c3fd9c9ce8414fc495f5a4f1d46c6c51 /fs/ext4 | |
| parent | 7fb64133360b10edcae3c6f5afffaa449668831e (diff) | |
| download | lwn-170417c8c7bb2cbbdd949bf5c443c0c8f24a203b.tar.gz lwn-170417c8c7bb2cbbdd949bf5c443c0c8f24a203b.zip | |
ext4: fix block validity checks for journal inodes using indirect blocks
Commit 345c0dbf3a30 ("ext4: protect journal inode's blocks using
block_validity") failed to add an exception for the journal inode in
ext4_check_blockref(), which is the function used by ext4_get_branch()
for indirect blocks. This caused attempts to read from the ext3-style
journals to fail with:
[ 848.968550] EXT4-fs error (device sdb7): ext4_get_branch:171: inode #8: block 30343695: comm jbd2/sdb7-8: invalid block
Fix this by adding the missing exception check.
Fixes: 345c0dbf3a30 ("ext4: protect journal inode's blocks using block_validity")
Reported-by: Arthur Marsh <arthur.marsh@internode.on.net>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/block_validity.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c index 8d03550aaae3..8e83741b02e0 100644 --- a/fs/ext4/block_validity.c +++ b/fs/ext4/block_validity.c @@ -277,6 +277,11 @@ int ext4_check_blockref(const char *function, unsigned int line, __le32 *bref = p; unsigned int blk; + if (ext4_has_feature_journal(inode->i_sb) && + (inode->i_ino == + le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum))) + return 0; + while (bref < p+max) { blk = le32_to_cpu(*bref++); if (blk && |