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

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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.