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| author | Jan Kara <jack@suse.cz> | 2014-10-30 10:53:16 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-10-30 10:53:16 -0400 |
| commit | 599a9b77ab289d85c2d5c8607624efbe1f552b0f (patch) | |
| tree | 43e9dd2f0e5219a97918c9677b43c1c81abf4057 | |
| parent | 9378c6768e4fca48971e7b6a9075bc006eda981d (diff) | |
| download | linux-599a9b77ab289d85c2d5c8607624efbe1f552b0f.tar.gz linux-599a9b77ab289d85c2d5c8607624efbe1f552b0f.tar.bz2 linux-599a9b77ab289d85c2d5c8607624efbe1f552b0f.zip | |
ext4: fix oops when loading block bitmap failed
When we fail to load block bitmap in __ext4_new_inode() we will
dereference NULL pointer in ext4_journal_get_write_access(). So check
for error from ext4_read_block_bitmap().
Coverity-id: 989065
Cc: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/ialloc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 8012a5daf401..ac644c31ca67 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -887,6 +887,10 @@ got: struct buffer_head *block_bitmap_bh; block_bitmap_bh = ext4_read_block_bitmap(sb, group); + if (!block_bitmap_bh) { + err = -EIO; + goto out; + } BUFFER_TRACE(block_bitmap_bh, "get block bitmap access"); err = ext4_journal_get_write_access(handle, block_bitmap_bh); if (err) { |