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don’t read past buffer for empty nameref targets (fmunozs, Valgrind)

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tg 2016-03-01 20:06:15 +00:00
parent 539714f78a
commit 85c377dfc2
1 changed files with 6 additions and 4 deletions
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10
var.c
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@ -28,7 +28,7 @@
#include <sys/sysctl.h> #include <sys/sysctl.h>
#endif #endif
__RCSID("$MirOS: src/bin/mksh/var.c,v 1.199 2016/02/26 18:48:14 tg Exp $"); __RCSID("$MirOS: src/bin/mksh/var.c,v 1.200 2016/03/01 20:06:15 tg Exp $");
/*- /*-
* Variables * Variables
@ -829,12 +829,14 @@ typeset(const char *var, uint32_t set, uint32_t clr, int field, int base)
/* check target value for being a valid variable name */ /* check target value for being a valid variable name */
ccp = skip_varname(qval, false); ccp = skip_varname(qval, false);
if (ccp == qval) { if (ccp == qval) {
if (ksh_isdigit(qval[0])) { int c;
int c;
if (!(c = (unsigned char)qval[0]))
goto nameref_empty;
else if (ksh_isdigit(c))
if (getn(qval, &c)) if (getn(qval, &c))
goto nameref_rhs_checked; goto nameref_rhs_checked;
} else if (qval[1] == '\0') switch (qval[0]) { else if (qval[1] == '\0') switch (c) {
case '$': case '$':
case '!': case '!':
case '?': case '?':