Re: [PATCH v2 1/3] scsi: Fix a scsi_show_rq() NULL pointer dereference

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Bart,

> Avoid that scsi_show_rq() triggers a NULL pointer dereference if
> called after sd_uninit_command(). Swap the NULL pointer assignment
> and the mempool_free() call in sd_uninit_command() to make it less
> likely that scsi_show_rq() triggers a use-after-free. Note: even
> with these changes scsi_show_rq() can trigger a use-after-free but
> that's a lesser evil than e.g. suppressing debug information for
> T10-PI commands completely. This patch fixes the following oops:

Applied to 4.15/scsi-fixes. Thanks, Bart.

-- 
Martin K. Petersen	Oracle Linux Engineering



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