scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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commit 6662e4323b9d658de6cf909c16f997515e03d83b
parent bde0ef892aeb95d7aaa95ffb11b0bd82b2a31d9c
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 12 Jan 2017 08:55:02 +0100

[cc1] fix off-by-one bug in getdefs

The pointer to the buffer was incremented but the size was not decremented,
and it could generate overrun in buffers.

Diffstat:
Mcc1/cpp.c | 4+++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cc1/cpp.c b/cc1/cpp.c @@ -351,8 +351,10 @@ getdefs(Symbol *args[NR_MACROARG], int nargs, char *bp, size_t bufsiz) bp += len; bufsiz -= len; } - if ((prevc = yytoken) != '#') + if ((prevc = yytoken) != '#') { *bp++ = ' '; + --bufsiz; + } next(); } *bp = '\0';