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Differential D24538

pf: Improve DIOCADDRULE validation
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Authored by kp on Apr 22 2020, 7:11 PM.
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farrokhi
imp
melifaro

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melifaro
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rS360609: pf: Improve DIOCADDRULE validation
Summary

We expect the addrwrap.p.dyn value to be set to NULL (and assert such),
but do not verify it on input.

Reported-by: syzbot+936a89182e7d8f927de1@syzkaller.appspotmail.com

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Build 28404: arc lint + arc unit

Event Timeline

kp created this revision.Apr 22 2020, 7:11 PM
Herald added subscribers: melifaro, farrokhi. · View Herald TranscriptApr 22 2020, 7:11 PM
Harbormaster completed remote builds in B30669: Diff 70888.Apr 22 2020, 7:11 PM
melifaro accepted this revision as: melifaro.Apr 29 2020, 7:12 PM

LGTM, please see some comments inline.

sys/netpfil/pf/pf_ioctl.c
1573

Maybe it's worth considering doing input validation before WLOCK/etc ?

1605

Nit: worth documenting why we don't want dyn to be set by userland?

This revision is now accepted and ready to land.Apr 29 2020, 7:12 PM
kp updated this revision to Diff 71238.May 1 2020, 12:54 PM

Move the check outside of the lock.

This revision now requires review to proceed.May 1 2020, 12:54 PM
Harbormaster completed remote builds in B30840: Diff 71238.May 1 2020, 12:54 PM
This revision was not accepted when it landed; it landed in state Needs Review.May 3 2020, 4:09 PM
Closed by commit rS360609: pf: Improve DIOCADDRULE validation (authored by kp). · Explain Why
This revision was automatically updated to reflect the committed changes.
kp added a commit: rS360609: pf: Improve DIOCADDRULE validation.
Herald added a subscriber: imp. · View Herald TranscriptMay 3 2020, 4:09 PM

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sys/
netpfil/
pf/
3 lines

Diff 70888

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sys/netpfil/pf/pf_ioctl.c

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