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xmllint: Validate --maxmem integer option

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Fixes #520.
This commit is contained in:
Nick Wellnhofer 2023-04-20 16:22:11 +02:00
parent 250faf3c83
commit db32b09d50
1 changed files with 21 additions and 4 deletions
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25
xmllint.c
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@ -14,6 +14,8 @@
#include <stdlib.h>
#include <assert.h>
#include <time.h>
#include <errno.h>
#include <limits.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
@ -3085,10 +3087,25 @@ main(int argc, char **argv) {
if ((!strcmp(argv[i], "-maxmem")) ||
(!strcmp(argv[i], "--maxmem"))) {
i++;
if ((i >= argc) || (sscanf(argv[i], "%d", &maxmem) != 1)) {
maxmem = 0;
}
char *val_end;
long val;
i++;
if (i >= argc) {
fprintf(stderr, "maxmem: missing integer value\n");
return(XMLLINT_ERR_UNCLASS);
}
errno = 0;
val = strtol(argv[i], &val_end, 10);
if (errno == EINVAL || *val_end != 0) {
fprintf(stderr, "maxmem: invalid integer: %s\n", argv[i]);
return(XMLLINT_ERR_UNCLASS);
}
if (errno != 0 || val < 0 || val > INT_MAX) {
fprintf(stderr, "maxmem: integer out of range: %s\n", argv[i]);
return(XMLLINT_ERR_UNCLASS);
}
maxmem = val;
}
}
if (maxmem != 0)