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Differential D22790

add zfree to zero allocation before free
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Authored by mmacy on Dec 13 2019, 12:05 AM.
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rS357987: Add zfree to zero allocation before free
Summary

Key and cookie management typically wants to avoid information leaks by explicitly zeroing before free. This routine simplifies that by permitting consumers to do so without carrying the size around.

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rS FreeBSD src repository - subversion
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Event Timeline

mmacy created this revision.Dec 13 2019, 12:05 AM
Herald added a subscriber: imp. · View Herald TranscriptDec 13 2019, 12:05 AM
Harbormaster completed remote builds in B28117: Diff 65572.Dec 13 2019, 12:05 AM
cem added a subscriber: cem.Dec 13 2019, 2:25 AM

Can you upload a diff with more context? -U9999 or arc diff, whatever.

jhb accepted this revision.Dec 13 2019, 2:27 AM
This revision is now accepted and ready to land.Dec 13 2019, 2:27 AM
jeff accepted this revision.Dec 13 2019, 2:42 AM
jhb added a comment.Dec 13 2019, 5:24 PM

Forgot to mention yesterday: it should be added to the malloc.9 manpage as well.

Closed by commit rS357987: Add zfree to zero allocation before free (authored by mmacy). · Explain WhyFeb 16 2020, 12:12 AM
This revision was automatically updated to reflect the committed changes.
mmacy added a commit: rS357987: Add zfree to zero allocation before free.
Herald added a reviewer: manpages. · View Herald TranscriptFeb 16 2020, 12:13 AM

Revision Contents
Changeset List

PathSize
head/
share/
man/
man9/
15 lines
sys/
kern/
42 lines
sys/
1 line

Diff 68384

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head/share/man/man9/malloc.9

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head/sys/kern/kern_malloc.c

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head/sys/sys/malloc.h

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