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b2b_entities: fix crash calling b2b_init_request from async resume route #3822

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b2b_entities: fix crash calling b2b_init_request from async resume route #3822

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8 changes: 8 additions & 0 deletions modules/b2b_entities/dlg.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3983,6 +3983,14 @@ int b2b_apply_lumps(struct sip_msg* msg)
if (msg==NULL || msg == FAKED_REPLY || msg==&dummy_msg)
return 0;

/* TM faked requests have parsed headers in SHM (from the
* transaction copy). free_sip_msg() below would try to
* pkg_free() those SHM pointers, causing a "dangling pkg
* pointer" abort. Skip lump application for these messages.
* (see GH #3796) */
if (msg->msg_flags & FL_TM_FAKE_REQ)
return 0;

if(!msg->body_lumps && !msg->add_rm)
return 0;

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