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File _service:tar_scm:backport-0008-Make-sure-all-open-file-descriptors-are-closed-on-ex.patch of Package dhcp
Reference: https://src.fedoraproject.org/rpms/dhcp/blob/rawhide/f/0008-Make-sure-all-open-file-descriptors-are-closed-on-ex.patch From 39ce1ca26128f4a5d018a567157320ba1f68f4ea Mon Sep 17 00:00:00 2001 From: Pavel Zhukov <pzhukov@redhat.com> Date: Thu, 21 Feb 2019 10:27:18 +0100 Subject: [PATCH 08/28] Make sure all open file descriptors are closed-on-exec for SELinux ISC-bug: #19148 --- client/clparse.c | 4 ++-- client/dhclient.c | 28 ++++++++++++++-------------- common/bpf.c | 2 +- common/dlpi.c | 2 +- common/nit.c | 2 +- common/resolv.c | 2 +- common/upf.c | 2 +- omapip/trace.c | 6 +++--- relay/dhcrelay.c | 10 +++++----- server/confpars.c | 2 +- server/db.c | 4 ++-- server/dhcpd.c | 14 +++++++------- server/ldap.c | 2 +- 13 files changed, 40 insertions(+), 40 deletions(-) diff --git a/client/clparse.c b/client/clparse.c index e63ea08..902b523 100644 --- a/client/clparse.c +++ b/client/clparse.c @@ -291,7 +291,7 @@ int read_client_conf_file (const char *name, struct interface_info *ip, int token; isc_result_t status; - if ((file = open (name, O_RDONLY)) < 0) + if ((file = open (name, O_RDONLY | O_CLOEXEC)) < 0) return uerr2isc (errno); cfile = NULL; @@ -367,7 +367,7 @@ void read_client_leases () /* Open the lease file. If we can't open it, just return - we can safely trust the server to remember our state. */ - if ((file = open (path_dhclient_db, O_RDONLY)) < 0) + if ((file = open (path_dhclient_db, O_RDONLY | O_CLOEXEC)) < 0) return; cfile = NULL; diff --git a/client/dhclient.c b/client/dhclient.c index 07679a7..aefc119 100644 --- a/client/dhclient.c +++ b/client/dhclient.c @@ -279,11 +279,11 @@ main(int argc, char **argv) { /* Make sure that file descriptors 0 (stdin), 1, (stdout), and 2 (stderr) are open. To do this, we assume that when we open a file the lowest available file descriptor is used. */ - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 0) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 1) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 2) log_perror = 0; /* No sense logging to /dev/null. */ else if (fd != -1) @@ -771,7 +771,7 @@ main(int argc, char **argv) { long temp; int e; - if ((pidfd = fopen(path_dhclient_pid, "r")) != NULL) { + if ((pidfd = fopen(path_dhclient_pid, "re")) != NULL) { e = fscanf(pidfd, "%ld\n", &temp); oldpid = (pid_t)temp; @@ -826,7 +826,7 @@ main(int argc, char **argv) { strncpy(new_path_dhclient_pid, path_dhclient_pid, pfx); sprintf(new_path_dhclient_pid + pfx, "-%s.pid", ip->name); - if ((pidfd = fopen(new_path_dhclient_pid, "r")) != NULL) { + if ((pidfd = fopen(new_path_dhclient_pid, "re")) != NULL) { e = fscanf(pidfd, "%ld\n", &temp); oldpid = (pid_t)temp; @@ -851,7 +851,7 @@ main(int argc, char **argv) { int dhc_running = 0; char procfn[256] = ""; - if ((pidfp = fopen(path_dhclient_pid, "r")) != NULL) { + if ((pidfp = fopen(path_dhclient_pid, "re")) != NULL) { if ((fscanf(pidfp, "%ld", &temp)==1) && ((dhcpid=(pid_t)temp) > 0)) { snprintf(procfn,256,"/proc/%u",dhcpid); dhc_running = (access(procfn, F_OK) == 0); @@ -4054,7 +4054,7 @@ void rewrite_client_leases () if (leaseFile != NULL) fclose (leaseFile); - leaseFile = fopen (path_dhclient_db, "w"); + leaseFile = fopen (path_dhclient_db, "we"); if (leaseFile == NULL) { log_error ("can't create %s: %m", path_dhclient_db); return; @@ -4249,7 +4249,7 @@ write_duid(struct data_string *duid) return DHCP_R_INVALIDARG; if (leaseFile == NULL) { /* XXX? */ - leaseFile = fopen(path_dhclient_db, "w"); + leaseFile = fopen(path_dhclient_db, "we"); if (leaseFile == NULL) { log_error("can't create %s: %m", path_dhclient_db); return ISC_R_IOERROR; @@ -4453,7 +4453,7 @@ int write_client_lease (client, lease, rewrite, makesure) return 1; if (leaseFile == NULL) { /* XXX */ - leaseFile = fopen (path_dhclient_db, "w"); + leaseFile = fopen (path_dhclient_db, "we"); if (leaseFile == NULL) { log_error ("can't create %s: %m", path_dhclient_db); return 0; @@ -5039,9 +5039,9 @@ void detach () (void) close(2); /* Reopen them on /dev/null. */ - (void) open("/dev/null", O_RDWR); - (void) open("/dev/null", O_RDWR); - (void) open("/dev/null", O_RDWR); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); write_client_pid_file (); @@ -5059,14 +5059,14 @@ void write_client_pid_file () return; } - pfdesc = open (path_dhclient_pid, O_CREAT | O_TRUNC | O_WRONLY, 0644); + pfdesc = open (path_dhclient_pid, O_CREAT | O_TRUNC | O_WRONLY | O_CLOEXEC, 0644); if (pfdesc < 0) { log_error ("Can't create %s: %m", path_dhclient_pid); return; } - pf = fdopen (pfdesc, "w"); + pf = fdopen (pfdesc, "we"); if (!pf) { close(pfdesc); log_error ("Can't fdopen %s: %m", path_dhclient_pid); diff --git a/common/bpf.c b/common/bpf.c index 0bffcbf..d2a0549 100644 --- a/common/bpf.c +++ b/common/bpf.c @@ -94,7 +94,7 @@ int if_register_bpf (info) for (b = 0; 1; b++) { /* %Audit% 31 bytes max. %2004.06.17,Safe% */ sprintf(filename, BPF_FORMAT, b); - sock = open (filename, O_RDWR, 0); + sock = open (filename, O_RDWR | O_CLOEXEC, 0); if (sock < 0) { if (errno == EBUSY) { continue; diff --git a/common/dlpi.c b/common/dlpi.c index f2332c0..bf6e21f 100644 --- a/common/dlpi.c +++ b/common/dlpi.c @@ -817,7 +817,7 @@ dlpiopen(const char *ifname) { } *dp = '\0'; - return open (devname, O_RDWR, 0); + return open (devname, O_RDWR | O_CLOEXEC, 0); } /* diff --git a/common/nit.c b/common/nit.c index ba62488..4ebfa4a 100644 --- a/common/nit.c +++ b/common/nit.c @@ -75,7 +75,7 @@ int if_register_nit (info) struct strioctl sio; /* Open a NIT device */ - sock = open ("/dev/nit", O_RDWR); + sock = open ("/dev/nit", O_RDWR | O_CLOEXEC); if (sock < 0) log_fatal ("Can't open NIT device for %s: %m", info -> name); diff --git a/common/resolv.c b/common/resolv.c index 5fd683f..3535f3e 100644 --- a/common/resolv.c +++ b/common/resolv.c @@ -43,7 +43,7 @@ void read_resolv_conf (parse_time) struct domain_search_list *dp, *dl, *nd; isc_result_t status; - if ((file = open (path_resolv_conf, O_RDONLY)) < 0) { + if ((file = open (path_resolv_conf, O_RDONLY | O_CLOEXEC)) < 0) { log_error ("Can't open %s: %m", path_resolv_conf); return; } diff --git a/common/upf.c b/common/upf.c index 37e5cb2..b7c0649 100644 --- a/common/upf.c +++ b/common/upf.c @@ -71,7 +71,7 @@ int if_register_upf (info) /* %Audit% Cannot exceed 36 bytes. %2004.06.17,Safe% */ sprintf(filename, "/dev/pf/pfilt%d", b); - sock = open (filename, O_RDWR, 0); + sock = open (filename, O_RDWR | O_CLOEXEC, 0); if (sock < 0) { if (errno == EBUSY) { continue; diff --git a/omapip/trace.c b/omapip/trace.c index dc9185f..a605d18 100644 --- a/omapip/trace.c +++ b/omapip/trace.c @@ -136,10 +136,10 @@ isc_result_t trace_begin (const char *filename, return DHCP_R_INVALIDARG; } - traceoutfile = open (filename, O_CREAT | O_WRONLY | O_EXCL, 0600); + traceoutfile = open (filename, O_CREAT | O_WRONLY | O_EXCL | O_CLOEXEC, 0600); if (traceoutfile < 0 && errno == EEXIST) { log_error ("WARNING: Overwriting trace file \"%s\"", filename); - traceoutfile = open (filename, O_WRONLY | O_EXCL | O_TRUNC, + traceoutfile = open (filename, O_WRONLY | O_EXCL | O_TRUNC | O_CLOEXEC, 0600); } @@ -427,7 +427,7 @@ void trace_file_replay (const char *filename) isc_result_t result; int len; - traceinfile = fopen (filename, "r"); + traceinfile = fopen (filename, "re"); if (!traceinfile) { log_error("Can't open tracefile %s: %m", filename); return; diff --git a/relay/dhcrelay.c b/relay/dhcrelay.c index 946ef1b..a7b1286 100644 --- a/relay/dhcrelay.c +++ b/relay/dhcrelay.c @@ -305,11 +305,11 @@ main(int argc, char **argv) { /* Make sure that file descriptors 0(stdin), 1,(stdout), and 2(stderr) are open. To do this, we assume that when we open a file the lowest available file descriptor is used. */ - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 0) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 1) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 2) log_perror = 0; /* No sense logging to /dev/null. */ else if (fd != -1) @@ -800,13 +800,13 @@ main(int argc, char **argv) { /* Create the pid file. */ if (no_pid_file == ISC_FALSE) { pfdesc = open(path_dhcrelay_pid, - O_CREAT | O_TRUNC | O_WRONLY, 0644); + O_CREAT | O_TRUNC | O_WRONLY | O_CLOEXEC, 0644); if (pfdesc < 0) { log_error("Can't create %s: %m", path_dhcrelay_pid); } else { - pf = fdopen(pfdesc, "w"); + pf = fdopen(pfdesc, "we"); if (!pf) log_error("Can't fdopen %s: %m", path_dhcrelay_pid); diff --git a/server/confpars.c b/server/confpars.c index 103af1e..5a6396b 100644 --- a/server/confpars.c +++ b/server/confpars.c @@ -118,7 +118,7 @@ isc_result_t read_conf_file (const char *filename, struct group *group, } #endif - if ((file = open (filename, O_RDONLY)) < 0) { + if ((file = open (filename, O_RDONLY | O_CLOEXEC)) < 0) { if (leasep) { log_error ("Can't open lease database %s: %m --", path_dhcpd_db); diff --git a/server/db.c b/server/db.c index cecbf6b..4243a92 100644 --- a/server/db.c +++ b/server/db.c @@ -1154,7 +1154,7 @@ int new_lease_file (int test_mode) path_dhcpd_db, (int)t) >= sizeof newfname) log_fatal("new_lease_file: lease file path too long"); - db_fd = open (newfname, O_WRONLY | O_TRUNC | O_CREAT, 0664); + db_fd = open (newfname, O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, 0664); if (db_fd < 0) { log_error ("Can't create new lease file: %m"); return 0; @@ -1175,7 +1175,7 @@ int new_lease_file (int test_mode) } #endif /* PARANOIA */ - if ((new_db_file = fdopen(db_fd, "w")) == NULL) { + if ((new_db_file = fdopen(db_fd, "we")) == NULL) { log_error("Can't fdopen new lease file: %m"); close(db_fd); goto fdfail; diff --git a/server/dhcpd.c b/server/dhcpd.c index 3522889..845d0cc 100644 --- a/server/dhcpd.c +++ b/server/dhcpd.c @@ -300,11 +300,11 @@ main(int argc, char **argv) { /* Make sure that file descriptors 0 (stdin), 1, (stdout), and 2 (stderr) are open. To do this, we assume that when we open a file the lowest available file descriptor is used. */ - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 0) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 1) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 2) log_perror = 0; /* No sense logging to /dev/null. */ else if (fd != -1) @@ -975,7 +975,7 @@ main(int argc, char **argv) { * appropriate. */ if (no_pid_file == ISC_FALSE) { - i = open(path_dhcpd_pid, O_WRONLY|O_CREAT|O_TRUNC, 0644); + i = open(path_dhcpd_pid, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0644); if (i >= 0) { sprintf(pbuf, "%d\n", (int) getpid()); IGNORE_RET(write(i, pbuf, strlen(pbuf))); @@ -1028,9 +1028,9 @@ main(int argc, char **argv) { (void) close(2); /* Reopen them on /dev/null. */ - (void) open("/dev/null", O_RDWR); - (void) open("/dev/null", O_RDWR); - (void) open("/dev/null", O_RDWR); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); log_perror = 0; /* No sense logging to /dev/null. */ IGNORE_RET (chdir("/")); diff --git a/server/ldap.c b/server/ldap.c index e3e48f4..1a68936 100644 --- a/server/ldap.c +++ b/server/ldap.c @@ -1447,7 +1447,7 @@ ldap_start (void) if (ldap_debug_file != NULL && ldap_debug_fd == -1) { - if ((ldap_debug_fd = open (ldap_debug_file, O_CREAT | O_TRUNC | O_WRONLY, + if ((ldap_debug_fd = open (ldap_debug_file, O_CREAT | O_TRUNC | O_WRONLY | O_CLOEXEC, S_IRUSR | S_IWUSR)) < 0) log_error ("Error opening debug LDAP log file %s: %s", ldap_debug_file, strerror (errno)); -- 2.35.1
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