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Differential D30676

LinuxKPI: fix sg_pcopy_from_buffer()
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Authored by bz on Jun 7 2021, 3:16 PM.
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• hselasky
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linuxkpi
Commits
rGd2c8c4d15a6e: LinuxKPI: fix sg_pcopy_from_buffer()
rGedfcdffefc16: LinuxKPI: fix sg_pcopy_from_buffer()
Summary

In sg_pcopy_from_buffer() is an error in that skip can underflow
and lead to bogus page arithmetics which may lead to memory corruption
or more likely panics. Once we found a s/g page to copy into there
is nothing to skip anymore so simply set skip to 0.

Sponsored by: The FreeBSD Foundation
MFC after: 5 days

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rG FreeBSD src repository
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sys/
compat/
linuxkpi/
common/
include/
linux/
3 lines

Diff 91072

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sys/compat/linuxkpi/common/include/linux/scatterlist.h

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