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Fix using clear_table() within an &expire_func

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This previously crashed since clear_table()/TableVal::RemoveAll() left
behind a stale iterator to the old table causing a heap-use-after-free
when resuming table expiry iteration in TableVal::DoExpire().
This commit is contained in:
Jon Siwek 2021-04-26 22:45:14 -07:00
parent 76483a9efa
commit d51bd4bc46
3 changed files with 35 additions and 1 deletions
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2
testing/btest/Baseline/bifs.clear_table_expire_func/out Normal file
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
expire

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testing/btest/bifs/clear_table_expire_func.zeek Normal file
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# @TEST-EXEC: zeek -b %INPUT > out
# @TEST-EXEC: btest-diff out
# @TEST-DOC: Checks use of clear_table() within an &expire_func works.
redef exit_only_after_terminate=T;
redef table_expire_interval = 1msec;
global myexpire: function(t: table[count] of count, i: count): interval;
global mt: table[count] of count &create_expire=1msec &expire_func=myexpire;
function myexpire(t: table[count] of count, i: count): interval
{
print "expire";
clear_table(mt);
terminate();
return 0secs;
}
event zeek_init()
{
mt[0] = 0;
mt[1] = 1;
mt[2] = 2;
}