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Dan Carpenter authored
The value of "size" comes from the user. When we add "start + size" it could lead to an integer overflow bug. It means we vmalloc() a lot more memory than we had intended. I believe that on 64 bit systems vmalloc() can succeed even if we ask it to allocate huge 4GB buffers. So we would get memory corruption and likely a crash when we call ha->isp_ops->write_optrom() and ->read_optrom(). Only root can trigger this bug. Link: https://bugzilla.kernel.org/show_bug.cgi?id=194061 Cc: <stable@vger.kernel.org> Fixes: b7cc176c ("[SCSI] qla2xxx: Allow region-based flash-part accesses.") Reported-by:
shqking <shqking@gmail.com> Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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