diff options
| author | Vito Caputo <vito.caputo@coreos.com> | 2015-11-02 23:05:44 -0800 |
|---|---|---|
| committer | Vito Caputo <vito.caputo@coreos.com> | 2015-11-03 11:13:26 -0800 |
| commit | 046c93f8dbcdcebc0592cb489f7bb9ede067554b (patch) | |
| tree | 8c2071c6e3fa05a49d2a371e28dd0d8f9c8d475b | |
| parent | 2ac74784091679cf914d9e5ff5a35f8e0a3dd366 (diff) | |
sd-daemon: fix potential LISTEN_FDS overflow in sd_listen_fds()
| -rw-r--r-- | src/libsystemd/sd-daemon/sd-daemon.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/src/libsystemd/sd-daemon/sd-daemon.c b/src/libsystemd/sd-daemon/sd-daemon.c index 27045e25d0..f0d5d00b2e 100644 --- a/src/libsystemd/sd-daemon/sd-daemon.c +++ b/src/libsystemd/sd-daemon/sd-daemon.c @@ -58,8 +58,7 @@ static void unsetenv_all(bool unset_environment) { _public_ int sd_listen_fds(int unset_environment) { const char *e; - unsigned n; - int r, fd; + int n, r, fd; pid_t pid; e = getenv("LISTEN_PID"); @@ -84,17 +83,23 @@ _public_ int sd_listen_fds(int unset_environment) { goto finish; } - r = safe_atou(e, &n); + r = safe_atoi(e, &n); if (r < 0) goto finish; - for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) n; fd ++) { + assert_cc(SD_LISTEN_FDS_START < INT_MAX); + if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START) { + r = -EINVAL; + goto finish; + } + + for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) { r = fd_cloexec(fd, true); if (r < 0) goto finish; } - r = (int) n; + r = n; finish: unsetenv_all(unset_environment); |