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

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.