xfs: check _alloc_read_agf buffer pointer before using

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commit 10479e2dea upstream.

In some circumstances, _alloc_read_agf can return an error code of zero
but also a null AGF buffer pointer.  Check for this and jump out.

Fixes-coverity-id: 1415250
Fixes-coverity-id: 1415320
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Darrick J. Wong 2017-09-17 14:06:38 -07:00 • committed by Greg Kroah-Hartman

parent c32b1ec8a2

commit 01bc132048

2 changed files with 6 additions and 0 deletions

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4

fs/xfs/libxfs/xfs_refcount.c

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2

fs/xfs/xfs_reflink.c

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