32 lines
1.2 KiB
Diff
32 lines
1.2 KiB
Diff
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# HG changeset patch
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# Parent a84c8fe05da6097efaa00d8dee8a07b5816ae84e
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Don't assume that argv is allocated as a single flat buffer.
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While this is how the kernel behaves it is not a portable assumption.
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The assumption may also be violated if getopt_long(3) permutes arguments.
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Found by Qualys.
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--- a/src/parse_args.c
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+++ b/src/parse_args.c
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@@ -591,16 +591,16 @@ parse_args(int argc, char **argv, int *o
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if (argc != 0) {
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/* shell -c "command" */
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char *src, *dst;
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- size_t cmnd_size = (size_t) (argv[argc - 1] - argv[0]) +
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- strlen(argv[argc - 1]) + 1;
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+ size_t size = 0;
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- cmnd = dst = reallocarray(NULL, cmnd_size, 2);
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- if (cmnd == NULL)
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+ for (av = argv; *av != NULL; av++)
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+ size += strlen(*av) + 1;
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+ if (size == 0 || (cmnd = reallocarray(NULL, size, 2)) == NULL)
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sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
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if (!gc_add(GC_PTR, cmnd))
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exit(EXIT_FAILURE);
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- for (av = argv; *av != NULL; av++) {
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+ for (dst = cmnd, av = argv; *av != NULL; av++) {
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for (src = *av; *src != '\0'; src++) {
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/* quote potential meta characters */
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if (!isalnum((unsigned char)*src) && *src != '_' && *src != '-' && *src != '$')
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