Zack McKevitt 9baafc2fea accel/qaic: Add overflow check to remap_pfn_range during mmap ...

[ Upstream commit aa16b2bc0f ]

The call to remap_pfn_range in qaic_gem_object_mmap is susceptible to
(re)mapping beyond the VMA if the BO is too large. This can cause use
after free issues when munmap() unmaps only the VMA region and not the
additional mappings. To prevent this, check the remaining size of the
VMA before remapping and truncate the remapped length if sg->length is
too large.

Reported-by: Lukas Maar <lukas.maar@tugraz.at>
Fixes: ff13be8303 ("accel/qaic: Add datapath")
Reviewed-by: Karol Wachowski <karol.wachowski@linux.intel.com>
Signed-off-by: Zack McKevitt <zachary.mckevitt@oss.qualcomm.com>
Reviewed-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com>
[jhugo: fix braces from checkpatch --strict]
Signed-off-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com>
Link: https://patch.msgid.link/20260430193858.1178641-1-zachary.mckevitt@oss.qualcomm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-06-01 17:43:13 +02:00

..

habanalabs

accel/habanalabs: support mapping cb with vmalloc-backed coherent memory

2025-11-24 10:29:44 +01:00

ivpu

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qaic

accel/qaic: Add overflow check to remap_pfn_range during mmap

2026-06-01 17:43:13 +02:00

drm_accel.c

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Kconfig

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Makefile

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