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authorTheodore Ts'o <tytso@mit.edu>2019-05-15 00:51:19 -0400
committerTheodore Ts'o <tytso@mit.edu>2019-05-15 00:51:19 -0400
commit170417c8c7bb2cbbdd949bf5c443c0c8f24a203b (patch)
tree70dcb3c3c3fd9c9ce8414fc495f5a4f1d46c6c51 /fs/ext4
parent7fb64133360b10edcae3c6f5afffaa449668831e (diff)
downloadlinux-170417c8c7bb2cbbdd949bf5c443c0c8f24a203b.tar.bz2
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.c5
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 &&