https://gitlab.synchro.net/main/sbbs/-/commit/4a86ab8768e486a58d22d55e
Modified Files:
src/sbbs3/postmsg.cpp
Log Message:
Bounds-check subnum in savemsg()
It's possible to use savemsg() (from JS MsgBase.save_msg()) to add a message
to a message base that's not a sub-board (not configured in SCFG->Message
Areas and not the "mail" base), but in that case, savemsg() would dereference an invalid sub in the scfg->sub array and crash. So use is_valid_subum()
to insure the subnum is a valid sub before using as an index.
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