Subj : src/sbbs3/writemsg.cpp
To   : Git commit to main/sbbs/master
From : Rob Swindell (on Debian Linux)
Date : Wed May 06 2026 19:41:53

https://gitlab.synchro.net/main/sbbs/-/commit/a7106cca0cf813beb39710d0
Modified Files:
	src/sbbs3/writemsg.cpp
Log Message:
writemsg: bail out on ftell error before reusing offset (CID 640333)

writemsg() captures the message-start offset with ftell() and reuses
it via three subsequent fseek(stream, l, SEEK_SET) calls. ftell may
return -1 on error, in which case the fseek calls would seek to a
negative offset (UB) and corrupt the quoted-text buffer. Bail out
cleanly instead, mirroring the existing error-cleanup paths.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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