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LinuxKPI: fix sg_pcopy_from_buffer()
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Authored by bz on Jun 7 2021, 3:16 PM.
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Details

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.

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MFC after: 5 days

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rG FreeBSD src repository
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