Tyllis Xu 61d099ac4a scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done() ... A malicious or compromised VIO server can return a num_written value in the discover targets MAD response that exceeds max_targets. This value is stored directly in vhost->num_targets without validation, and is then used as the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which is only allocated for max_targets entries. Indices at or beyond max_targets access kernel memory outside the DMA-coherent allocation. The out-of-bounds data is subsequently embedded in Implicit Logout and PLOGI MADs that are sent back to the VIO server, leaking kernel memory. Fix by clamping num_written to max_targets before storing it. Fixes: 072b91f9c6 ("[SCSI] ibmvfc: IBM Power Virtual Fibre Channel Adapter Client Driver") Reported-by: Yuhao Jiang <danisjiang@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Tyllis Xu <LivelyCarpet87@gmail.com> Reviewed-by: Dave Marquardt <davemarq@linux.ibm.com> Acked-by: Tyrel Datwyler <tyreld@linux.ibm.com> Link: https://patch.msgid.link/20260314170151.548614-1-LivelyCarpet87@gmail.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>		2026-03-19 21:42:35 -04:00
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ibmvfc.c	scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()	2026-03-19 21:42:35 -04:00
ibmvfc.h	scsi: ibmvfc: Add max_sectors module parameter	2024-09-12 20:18:30 -04:00
ibmvscsi.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
ibmvscsi.h
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