Aucbvax.425
NET.v7bugs
utzoo!duke!vax135!ucbvax!mark
Mon Oct 13 18:59:49 1980
cu
Cu seems to keep track of what the user types in a line buffer.
There is no check for overflowing this buffer. Since one can easily
go for a long time in a screen editor without getting a return, it is easy
to core dump the receive process. The following patch seems to fix it:
at the beginning of the routine rd, before *p++=c; add
if (p >= &b[sizeof b]) p = b;
This fix was arrived at quickly, and it is possible that the author will
prefer a different fix, such as
if (p >= &b[sizeof b]) p--;
after *p++=c;. Actually, it seems like cu has little business keeping
a line buffer unless the first character was a tilde.
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