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Differential D30046

sbin/ipfw: Fix null pointer deference when printing counters
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Authored by donner on Apr 30 2021, 2:19 PM.
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Commits
rG552885bde600: ^sbin/ipfw: Fix null pointer deference when printing counters
rGb1902474a7c5: sbin/ipfw: Fix null pointer deference when printing counters
rG80b22e631506: sbin/ipfw: Fix null pointer deference when printing counters
rGbf7cc0f9cb66: sbin/ipfw: Fix null pointer deference when printing counters
Summary

ipfw -[tT] prints statistics of the last access. If the rule was never
used, the counter might be not exist. This happens unconditionally on
inserting a new rule. Avoid printing statistics in this case.

PR: 255491
Reported by: Haisheng Zhouz
MFC after: 1 week

Test Plan
# ipfw -t add allow tcp from any to any out

should not segfault.

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Repository
rG FreeBSD src repository
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PathSize
sbin/
ipfw/
51 lines

Diff 88507

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sbin/ipfw/ipfw2.c

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