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hs-v3: Fix NULL deref. in hs_circ_service_get_established_intro_circ()

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Found by Stem regression tests. Reported by atagar.

Fixes #32664

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2019-12-03 10:11:42 -05:00
parent 65759f2901
commit 3b64c6b6fc
1 changed files with 2 additions and 1 deletions
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3
src/feature/hs/hs_circuit.c
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@ -673,7 +673,8 @@ hs_circ_service_get_established_intro_circ(const hs_service_intro_point_t *ip)
}
/* Only return circuit if it is established. */
return (TO_CIRCUIT(circ)->purpose == CIRCUIT_PURPOSE_S_INTRO) ? circ : NULL;
return (circ && TO_CIRCUIT(circ)->purpose == CIRCUIT_PURPOSE_S_INTRO) ?
circ : NULL;
}
/** Called when we fail building a rendezvous circuit at some point other than