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xfs: return an error when an inline directory is too small 

If the size of an inline directory is so small that it doesn't
even cover the required header size, return an error to userspace
instead of ASSERTing and returning 0 like everything's ok.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reported-by: Jan Kara <jack@suse.cz>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2016-10-03 09:11:15 -07:00
parent 71be6b4942
commit 9cdafd8a76
1 changed files with 2 additions and 1 deletions
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3
fs/xfs/xfs_dir2_readdir.c
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@ -84,7 +84,8 @@ xfs_dir2_sf_getdents(
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
if (dp->i_d.di_size < xfs_dir2_sf_hdr_size(sfp->i8count))
return -EFSCORRUPTED;
/*
* If the block number in the offset is out of range, we're done.