mbuf: add bounds-checked mtod() accessors under bounds-safety
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Authored by abhijeetsharma2002_gmail.com on Sun, Oct 18, 1:41 AM.

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Reviewers

rpaulo
emaste

Summary

Under -fbounds-safety mtod() and mtodo() return a pointer bounded by the
mbuf's storage, and mtod_len() narrows that to m_len. Without the flag
nothing changes. debug.bounds_mtod_test checks which reads trap.

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Repository

rG FreeBSD src repository

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Build Status

Buildable 78323
Build 75206: arc lint + arc unit

Event Timeline

abhijeetsharma2002_gmail.com created this revision.Sun, Oct 18, 1:41 AM

abhijeetsharma2002_gmail.com held this revision as a draft.

Herald added subscribers: olce, imp. · View Herald TranscriptSun, Oct 18, 1:41 AM

Harbormaster completed remote builds in B78323: Diff 190162.Sun, Oct 18, 1:41 AM

abhijeetsharma2002_gmail.com added a parent revision: D58987: kern: add bounds-safety soft-trap runtime.Sun, Oct 18, 1:44 AM

abhijeetsharma2002_gmail.com added a child revision: D60830: tcp: build tcp_sack.c and tcp_reass.c under bounds-safety.Sun, Oct 18, 1:45 AM

abhijeetsharma2002_gmail.com added a reviewer: rpaulo.Sun, Oct 18, 1:50 AM

abhijeetsharma2002_gmail.com added a reviewer: emaste.

Revision Contents
Changeset List

Path

Size

sys/

kern/

kern_bounds_test.c

85 lines

sys/

mbuf.h

57 lines

Diff 190162

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sys/kern/kern_bounds_test.c