Re: [PATCH] xfs: handle NULL b_addr in xfs_buf_free

Christoph Hellwig <[email protected]>
Newsgroups org.kernel.vger.linux-xfs,org.kernel.vger.linux-kernel
Message-ID <[email protected]> 
On Sun, Jul 19, 2026 at 11:11:24PM +0800, Yun Zhou wrote:
> When xfs_buf_alloc_backing_mem() fails, xfs_buf_free() is called with
> bp->b_addr still NULL.  The code falls through to the folio_put path
> which calls virt_to_folio(NULL), dereferencing an invalid address and
> causing a kernel crash.

Looks good:

Reviewed-by: Christoph Hellwig <[email protected]>
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