3.13.11.11 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Jan Kara <[email protected]> commit 599a9b77ab289d85c2d5c8607624efbe1f552b0f upstream. 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 Signed-off-by: Jan Kara <[email protected]> Signed-off-by: Theodore Ts'o <[email protected]> Signed-off-by: Kamal Mostafa <[email protected]> --- fs/ext4/ialloc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 158ddf6..a8d1a64 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -864,6 +864,10 @@ 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) { -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
