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passt: Ignoring number of bytes read, CWE-252
Harmless, assuming sane kernel behaviour. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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5
passt.c
5
passt.c
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@ -195,6 +195,7 @@ static void seccomp(const struct ctx *c)
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*/
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static void check_root(void)
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{
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const char root_uid_map[] = " 0 0 4294967295";
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struct passwd *pw;
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char buf[BUFSIZ];
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int fd;
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@ -205,8 +206,8 @@ static void check_root(void)
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if ((fd = open("/proc/self/uid_map", O_RDONLY | O_CLOEXEC)) < 0)
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return;
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if (read(fd, buf, BUFSIZ) > 0 &&
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strcmp(buf, " 0 0 4294967295")) {
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if (read(fd, buf, BUFSIZ) != sizeof(root_uid_map) ||
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strncmp(buf, root_uid_map, sizeof(root_uid_map) - 1)) {
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close(fd);
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return;
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}
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