scsi: mpt3sas: fix an out of bound write

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[ Upstream commit 4a8842de8d ]

cpu_msix_table is allocated to store online cpus, but pci_irq_get_affinity
may return cpu_possible_mask which is then used to access cpu_msix_table.
That causes bad user experience.  Fix limits access to only online cpus,
I've also added an additional test to protect from an unlikely change in
cpu_online_mask.

[mkp: checkpatch]

Fixes: 1d55abc0e9 ("scsi: mpt3sas: switch to pci_alloc_irq_vectors")
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Acked-by: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Tomas Henzl 2018-01-19 16:22:05 +01:00 • committed by Greg Kroah-Hartman

parent 2b2a92910c

commit 59ad4bb717

1 changed files with 4 additions and 1 deletions

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drivers/scsi/mpt3sas/mpt3sas_base.c

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