Blame SOURCES/rsyslog-8.1911.0-rhbz1789675-serialize-crash-race.patch
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From: Jiri Vymazal <jvymazal@redhat.com>
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Date: Wed, 18 Dec 2019 09:48:15 +0100
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Subject: [PATCH] Fix race condition related to libfastjson when using DA queue
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Rsyslogd aborts when writing to disk queue from multiple workers simultaneously.
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It is assumed that libfastjson is not thread-safe.
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Resolve libfastjson race condition when writing to disk queue.
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see also https://github.com/rsyslog/rsyslog/issues/4099
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---
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runtime/msg.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/runtime/msg.c b/runtime/msg.c
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index b5c17cfdd4..f9da40005f 100644
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--- a/runtime/msg.c
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+++ b/runtime/msg.c
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@@ -1242,11 +1242,15 @@ static rsRetVal MsgSerialize(smsg_t *pThis, strm_t *pStrm)
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psz = pThis->pszStrucData;
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CHKiRet(obj.SerializeProp(pStrm, UCHAR_CONSTANT("pszStrucData"), PROPTYPE_PSZ, (void*) psz));
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if(pThis->json != NULL) {
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+ MsgLock(pThis);
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psz = (uchar*) json_object_get_string(pThis->json);
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+ MsgUnlock(pThis);
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CHKiRet(obj.SerializeProp(pStrm, UCHAR_CONSTANT("json"), PROPTYPE_PSZ, (void*) psz));
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}
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if(pThis->localvars != NULL) {
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+ MsgLock(pThis);
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psz = (uchar*) json_object_get_string(pThis->localvars);
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+ MsgUnlock(pThis);
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CHKiRet(obj.SerializeProp(pStrm, UCHAR_CONSTANT("localvars"), PROPTYPE_PSZ, (void*) psz));
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}
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