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libc: idn2utf()/utf2idn(): check for < 1 buffer, can't insert terminating NUL.

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This commit is contained in:
cinap_lenrek 2021-10-31 12:43:47 +00:00
parent 32665f51c7
commit 1051b023a8
1 changed files with 6 additions and 0 deletions
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6
sys/src/libc/9sys/idn.c
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@ -191,6 +191,9 @@ idn2utf(char *name, char *buf, int nbuf)
Rune rb[Domlen], r; Rune rb[Domlen], r;
int nc, nr, n; int nc, nr, n;
if(nbuf < 1)
return -1;
cp = name; cp = name;
dp = buf; dp = buf;
de = dp+nbuf-1; de = dp+nbuf-1;
@ -231,6 +234,9 @@ utf2idn(char *name, char *buf, int nbuf)
Rune rb[Domlen], r; Rune rb[Domlen], r;
int nc, nr, n; int nc, nr, n;
if(nbuf < 1)
return -1;
dp = buf; dp = buf;
de = dp+nbuf-1; de = dp+nbuf-1;
cp = name; cp = name;