IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields

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Overflowing either addrlimit or bytes_togo can allow userspace to trigger
a buffer overflow of kernel memory. Check for overflows in all the places
doing math on user controlled buffers.

Fixes: f931551baf ("IB/qib: Add new qib driver for QLogic PCIe InfiniBand adapters")
Link: https://lore.kernel.org/r/20211012175519.7298.77738.stgit@awfm-01.cornelisnetworks.com
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Mike Marciniszyn 2021-10-12 13:55:19 -04:00 • committed by Jason Gunthorpe

parent 1ab52ac1e9

commit d39bf40e55

1 changed files with 23 additions and 10 deletions

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drivers/infiniband/hw/qib/qib_user_sdma.c

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