From cf315c2f59829ea70179e2f5342c19c796e7350c Mon Sep 17 00:00:00 2001
From: Garfield Tan <xutan@google.com>
Date: Thu, 18 Jun 2020 11:16:13 +0000
Subject: [PATCH 5/6] samba-documents-provider-sambapatch

https://github.com/google/samba-documents-provider/blob/master/sambapatch.diff

smbd crash fix:
https://github.com/elliott10/samba-4.5.1
---
 lib/param/loadparm.h               |   1 +
 lib/replace/getifaddrs.c           |   8 +
 lib/replace/netlink_ifaddrs.c      | 271 +++++++++++++++++++++++++++++
 lib/replace/replace.c              |  14 ++
 lib/replace/replace.h              |   5 +
 lib/socket/interfaces.c            |   4 +
 lib/util/util_pw.c                 |   2 -
 librpc/ndr/util.c                  |   2 +-
 nsswitch/libwbclient/wbc_pwd.c     |   5 -
 nsswitch/libwbclient/wbc_sid.c     |   2 +-
 nsswitch/winbind_struct_protocol.h |   4 +
 source3/lib/dumpcore.c             |   2 +-
 source3/lib/username.c             |   2 +
 source3/passdb/passdb.c            |   1 +
 source4/lib/socket/socket.c        |   2 +-
 15 files changed, 314 insertions(+), 11 deletions(-)
 create mode 100644 lib/replace/netlink_ifaddrs.c

diff --git a/lib/param/loadparm.h b/lib/param/loadparm.h
index 65ff62c..e15546e 100644
--- a/lib/param/loadparm.h
+++ b/lib/param/loadparm.h
@@ -31,6 +31,7 @@
 #define _LOADPARM_H
 
 #include <talloc.h>
+#include "system/time.h"
 
 struct parmlist_entry {
 	struct parmlist_entry *prev, *next;
diff --git a/lib/replace/getifaddrs.c b/lib/replace/getifaddrs.c
index a55ef7e..3f4f920 100644
--- a/lib/replace/getifaddrs.c
+++ b/lib/replace/getifaddrs.c
@@ -44,6 +44,7 @@
 #define _FOUND_IFACE_ANY
 #else
 
+#ifndef __ANDROID__
 void rep_freeifaddrs(struct ifaddrs *ifp)
 {
 	if (ifp != NULL) {
@@ -55,6 +56,7 @@ void rep_freeifaddrs(struct ifaddrs *ifp)
 		free(ifp);
 	}
 }
+#endif // __ANDROID__
 
 static struct sockaddr *sockaddr_dup(struct sockaddr *sa)
 {
@@ -374,6 +376,12 @@ int rep_getifaddrs(struct ifaddrs **ifap)
 
 #define _FOUND_IFACE_ANY
 #endif /* HAVE_IFACE_AIX */
+
+#ifdef __ANDROID__
+#include "netlink_ifaddrs.c"
+#define _FOUND_IFACE_ANY
+#endif /* __ANDROID__ */
+
 #ifndef _FOUND_IFACE_ANY
 int rep_getifaddrs(struct ifaddrs **ifap)
 {
diff --git a/lib/replace/netlink_ifaddrs.c b/lib/replace/netlink_ifaddrs.c
new file mode 100644
index 0000000..4b0456b
--- /dev/null
+++ b/lib/replace/netlink_ifaddrs.c
@@ -0,0 +1,271 @@
+#include "system/network.h"
+
+#include <errno.h>
+#include <linux/if_packet.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+
+#define MAX_SIZE 8192
+char *__netlink_data_;
+
+struct ifaddrs_container {
+  // This needs to be the first because we use this struct as a ifaddrs struct.
+  struct ifaddrs ifa;
+
+  int idx;
+
+  // Storage for pointers in ifa
+  struct sockaddr_storage addr;
+  struct sockaddr_storage netmask;
+  struct sockaddr_storage dstaddr;
+  char name[IFNAMSIZ  1];
+};
+
+static void init(struct ifaddrs_container *ifa, struct ifaddrs_container** ifap) {
+  memset(ifa, 0, sizeof(*ifa));
+
+  ifa->ifa.ifa_next = (struct ifaddrs*)(*ifap);
+  *ifap = ifa;
+}
+
+static uint8_t* addr_bytes(int family, struct sockaddr_storage *ss) {
+  switch (family) {
+    case AF_INET: {
+      struct sockaddr_in *ss4 = (struct sockaddr_in *)ss;
+      return (uint8_t*) (&ss4->sin_addr);
+    }
+    case AF_INET6: {
+      struct sockaddr_in6 *ss6 = (struct sockaddr_in6 *)ss;
+      return (uint8_t*) (&ss6->sin6_addr);
+    }
+    case AF_PACKET: {
+      struct sockaddr_ll* sll = (struct sockaddr_ll*)ss;
+      return (uint8_t*) (&sll->sll_addr);
+    }
+    default:
+      return NULL;
+  }
+}
+
+static struct sockaddr* copy_addr(int family, const void* data, size_t byteCount, struct sockaddr_storage *ss, int idx) {
+  ss->ss_family = family;
+  memcpy(addr_bytes(family, ss), data, byteCount);
+
+  if (family == AF_INET6 && (IN6_IS_ADDR_LINKLOCAL((struct in6_addr*)data) || IN6_IS_ADDR_MC_LINKLOCAL((struct in6_addr*)data))) {
+    struct sockaddr_in6* ss6 = (struct sockaddr_in6*)ss;
+    ss6->sin6_scope_id = idx;
+  }
+
+  return (struct sockaddr*)ss;
+}
+
+static void set_addr(struct ifaddrs_container *ifa, int family, const void *data, size_t byteCount) {
+  if (ifa->ifa.ifa_addr = NULL) {
+    // Assume this is IFA_LOCAL, if not set_local_addr will fix it.
+    ifa->ifa.ifa_addr = copy_addr(family, data, byteCount, &ifa->addr, ifa->idx);
+  } else {
+    // We already have a IFA_LOCAL, this should be a destination address.
+    ifa->ifa.ifa_dstaddr = copy_addr(family, data, byteCount, &ifa->dstaddr, ifa->idx);
+  }
+}
+
+static void set_local_addr(struct ifaddrs_container *ifa, int family, const void *data, size_t byteCount) {
+  // For P2P interface IFA_ADDRESS is destination and local address is supplied
+  // in IFA_LOCAL attribute.
+  if (ifa->ifa.ifa_addr != NULL) {
+    ifa->ifa.ifa_dstaddr = (struct sockaddr*)memcpy(&ifa->dstaddr, &ifa->addr, sizeof(ifa->addr));
+  }
+
+  ifa->ifa.ifa_addr = copy_addr(family, data, byteCount, &ifa->addr, ifa->idx);
+}
+
+static void set_netmask(struct ifaddrs_container *ifa, int family, size_t prefix_len) {
+  ifa->netmask.ss_family = family;
+  uint8_t *dst = addr_bytes(family, &ifa->netmask);
+  memset(dst, 0xff, prefix_len / 8);
+  if ((prefix_len % 8) != 0) {
+    dst[prefix_len / 8] = (0xff << (8 - (prefix_len % 8)));
+  }
+  ifa->ifa.ifa_netmask = (struct sockaddr*)(&ifa->netmask);
+}
+
+static void set_packet_attr(struct ifaddrs_container *ifa, int ifindex, unsigned short hatype, unsigned char halen) {
+  struct sockaddr_ll *sll = (struct sockaddr_ll *)(&ifa->addr);
+  sll->sll_ifindex = ifindex;
+  sll->sll_hatype = hatype;
+  sll->sll_halen = halen;
+}
+
+static int send_request(int socket, int type) {
+  struct {
+    struct nlmsghdr hdr;
+    struct rtgenmsg msg;
+  } request;
+  memset(&request, 0, sizeof(request));
+  request.hdr.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST;
+  request.hdr.nlmsg_type = type;
+  request.hdr.nlmsg_len = sizeof(request);
+  request.msg.rtgen_family = AF_UNSPEC;
+
+  int result = send(socket, &request, sizeof(request), 0);
+  return result == sizeof(request) ? 0 : -1;
+}
+
+static int read_response(int socket, struct ifaddrs_container **ifap, int (*callback)(struct ifaddrs_container**, struct nlmsghdr*)) {
+  if (!__netlink_data_) {
+    return -1;
+  }
+
+  ssize_t bytes_read;
+  while ((bytes_read = recv(socket, __netlink_data_, MAX_SIZE, 0)) > 0) {
+    struct nlmsghdr *hdr = (struct nlmsghdr *)__netlink_data_;
+    for (; NLMSG_OK(hdr, (size_t) bytes_read); hdr = NLMSG_NEXT(hdr, bytes_read)) {
+      switch (hdr->nlmsg_type) {
+        case NLMSG_DONE:
+          return 0;
+        case NLMSG_ERROR: {
+          struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(hdr);
+          errno = (hdr->nlmsg_len >= NLMSG_LENGTH(sizeof(struct nlmsgerr))) ? -err->error : EIO;
+          return -1;
+        }
+        default:
+          if (callback(ifap, hdr)) {
+            return -1;
+          }
+      }
+    }
+  }
+
+  // Recv fails before we see NLMSG_OK.
+  return -1;
+}
+
+static int __newlink_callback(struct ifaddrs_container** ifap, struct nlmsghdr* hdr) {
+  if (hdr->nlmsg_type != RTM_NEWLINK) {
+    return -1;
+  }
+
+  struct ifinfomsg* ifi = (struct ifinfomsg *)NLMSG_DATA(hdr);
+  struct ifaddrs_container *addr = (struct ifaddrs_container *)malloc(sizeof(struct ifaddrs_container));
+  init(addr, ifap);
+  addr->idx = ifi->ifi_index;
+  addr->ifa.ifa_flags = ifi->ifi_flags;
+
+  struct rtattr *rta = IFLA_RTA(ifi);
+  size_t rta_len = IFLA_PAYLOAD(hdr);
+  for (; RTA_OK(rta, rta_len); rta = RTA_NEXT(rta, rta_len)) {
+    switch (rta->rta_type) {
+      case IFLA_ADDRESS:
+        if (RTA_PAYLOAD(rta) < sizeof(addr->addr)) {
+          set_addr(addr, AF_PACKET, RTA_DATA(rta), RTA_PAYLOAD(rta));
+          set_packet_attr(addr, ifi->ifi_index, ifi->ifi_type, RTA_PAYLOAD(rta));
+        }
+        break;
+      case IFLA_BROADCAST:
+        if (RTA_PAYLOAD(rta) < sizeof(addr->dstaddr)) {
+          set_packet_attr(addr, ifi->ifi_index, ifi->ifi_type, RTA_PAYLOAD(rta));
+        }
+        break;
+      case IFLA_IFNAME:
+        if (RTA_PAYLOAD(rta) < sizeof(addr->name)) {
+          memcpy(addr->name, RTA_DATA(rta), RTA_PAYLOAD(rta));
+          addr->ifa.ifa_name = addr->name;
+        }
+        break;
+      default:
+        break;
+    }
+  }
+
+  return 0;
+}
+
+static int __newaddr_callback(struct ifaddrs_container** ifap, struct nlmsghdr* hdr) {
+  if (hdr->nlmsg_type != RTM_NEWADDR) {
+    return -1;
+  }
+
+  struct ifaddrmsg *msg = (struct ifaddrmsg*)NLMSG_DATA(hdr);
+  const struct ifaddrs_container *addr = (const struct ifaddrs_container *)(*ifap);
+  while (addr != NULL && addr->idx != (int)msg->ifa_index) {
+    addr = (const struct ifaddrs_container *)addr->ifa.ifa_next;
+  }
+  if (addr == NULL) {
+    // Unknown interface... Ignore it and treat it as successful.
+    return 0;
+  }
+
+  // Copy whatever we know about the interface.
+  struct ifaddrs_container *new_addr = (struct ifaddrs_container *)malloc(sizeof(struct ifaddrs_container));
+  init(new_addr, ifap);
+  strcpy(new_addr->name, addr->name);
+  new_addr->ifa.ifa_name = new_addr->name;
+  new_addr->ifa.ifa_flags = addr->ifa.ifa_flags;
+  new_addr->idx = addr->idx;
+
+  struct rtattr *rta = IFA_RTA(msg);
+  size_t rta_len = IFA_PAYLOAD(hdr);
+  for (; RTA_OK(rta, rta_len); rta = RTA_NEXT(rta, rta_len)) {
+    switch (rta->rta_type) {
+      case IFA_ADDRESS:
+        if (msg->ifa_family == AF_INET || msg->ifa_family == AF_INET6) {
+          set_addr(new_addr, msg->ifa_family, RTA_DATA(rta), RTA_PAYLOAD(rta));
+          set_netmask(new_addr, msg->ifa_family, msg->ifa_prefixlen);
+        }
+        break;
+      case IFA_LOCAL:
+        if (msg->ifa_family == AF_INET || msg->ifa_family == AF_INET6) {
+          set_local_addr(new_addr, msg->ifa_family, RTA_DATA(rta), RTA_PAYLOAD(rta));
+        }
+        break;
+      default:
+        break;
+    }
+  }
+
+  return 0;
+}
+
+int rep_getifaddrs(struct ifaddrs **ifap) {
+  *ifap = NULL;
+
+  __netlink_data_ = (char *) malloc(MAX_SIZE);
+  if (!__netlink_data_) {
+    errno = ENOMEM;
+    return -1;
+  }
+
+  int fd = socket(PF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
+  if (fd < 0) {
+    errno = EIO;
+    return -1;
+  }
+
+  int result = send_request(fd, RTM_GETLINK) || read_response(fd, (struct ifaddrs_container**)ifap, __newlink_callback) ||
+      send_request(fd, RTM_GETADDR) || read_response(fd, (struct ifaddrs_container**)ifap, __newaddr_callback);
+
+  close(fd);
+
+  free(__netlink_data_);
+  __netlink_data_ = NULL;
+
+  if (result) {
+    freeifaddrs(*ifap);
+    *ifap = NULL;
+    return -1;
+  }
+
+  return 0;
+}
+
+void rep_freeifaddrs(struct ifaddrs *ifap) {
+  while (ifap != NULL) {
+    struct ifaddrs *cur = ifap;
+    ifap = ifap->ifa_next;
+    free(cur);
+  }
+}
diff --git a/lib/replace/replace.c b/lib/replace/replace.c
index 99b18e8..d77fa18 100644
--- a/lib/replace/replace.c
+++ b/lib/replace/replace.c
@@ -948,6 +948,20 @@ void rep_setproctitle_init(int argc, char *argv[], char *envp[])
 }
 #endif
 
+#ifndef HAVE_SWAB
+void rep_swab(const void *from, void *to, ssize_t n) {
+  ssize_t i;
+  if (n <= 0)
+    return;
+
+  n >>= 1;
+  for (i = 0; i < n; ++i) {
+    uint16_t src = *((uint16_t*)from+i);
+    *((uint16_t*)to+i) = (((src & 0x00ffU) << 8) | ((src & 0xff00U) >> 8));
+  }
+}
+#endif /* HAVE_SWAB */
+
 #ifndef HAVE_MEMSET_S
 # ifndef RSIZE_MAX
 #  define RSIZE_MAX (SIZE_MAX >> 1)
diff --git a/lib/replace/replace.h b/lib/replace/replace.h
index 3f6b138..1c24ddb 100644
--- a/lib/replace/replace.h
+++ b/lib/replace/replace.h
@@ -958,6 +958,11 @@ const char *rep_getprogname(void);
 # endif /* HAVE_FALLTHROUGH_ATTRIBUTE */
 #endif /* FALL_THROUGH */
 
+#ifndef HAVE_SWAB
+#define swab rep_swab
+void rep_swab(const void *from, void *to, ssize_t n);
+#endif
+
 bool nss_wrapper_enabled(void);
 bool nss_wrapper_hosts_enabled(void);
 bool socket_wrapper_enabled(void);
diff --git a/lib/socket/interfaces.c b/lib/socket/interfaces.c
index ac26b97..f5698f6 100644
--- a/lib/socket/interfaces.c
+++ b/lib/socket/interfaces.c
@@ -126,6 +126,10 @@ void make_net(struct sockaddr_storage *pss_out,
 }
 
 #ifdef HAVE_ETHTOOL
+static inline uint32_t ethtool_cmd_speed(const struct ethtool_cmd *ecmd) {
+  return (ecmd->speed_hi << 16) | ecmd->speed;
+}
+
 static void query_iface_speed_from_name(const char *name, uint64_t *speed)
 {
 	int ret = 0;
diff --git a/lib/util/util_pw.c b/lib/util/util_pw.c
index 8035de4..5d70615 100644
--- a/lib/util/util_pw.c
+++ b/lib/util/util_pw.c
@@ -37,7 +37,6 @@ struct passwd *tcopy_passwd(TALLOC_CTX *mem_ctx,
 
 	len += strlen(from->pw_name)+1;
 	len += strlen(from->pw_passwd)+1;
-	len += strlen(from->pw_gecos)+1;
 	len += strlen(from->pw_dir)+1;
 	len += strlen(from->pw_shell)+1;
 
@@ -51,7 +50,6 @@ struct passwd *tcopy_passwd(TALLOC_CTX *mem_ctx,
 	ret->pw_passwd = talloc_strdup(ret, from->pw_passwd);
 	ret->pw_uid = from->pw_uid;
 	ret->pw_gid = from->pw_gid;
-	ret->pw_gecos = talloc_strdup(ret, from->pw_gecos);
 	ret->pw_dir = talloc_strdup(ret, from->pw_dir);
 	ret->pw_shell = talloc_strdup(ret, from->pw_shell);
 
diff --git a/librpc/ndr/util.c b/librpc/ndr/util.c
index 0eb7eba..c2a2470 100644
--- a/librpc/ndr/util.c
+++ b/librpc/ndr/util.c
@@ -20,8 +20,8 @@
 */
 
 #include "includes.h"
-#include "../librpc/ndr/libndr.h"
 #include "system/network.h"
+#include "../librpc/ndr/libndr.h"
 #include "lib/util/util_net.h"
 
 _PUBLIC_ void ndr_print_sockaddr_storage(struct ndr_print *ndr, const char *name, const struct sockaddr_storage *ss)
diff --git a/nsswitch/libwbclient/wbc_pwd.c b/nsswitch/libwbclient/wbc_pwd.c
index 805ab63..8484194 100644
--- a/nsswitch/libwbclient/wbc_pwd.c
+++ b/nsswitch/libwbclient/wbc_pwd.c
@@ -46,7 +46,6 @@ static void wbcPasswdDestructor(void *ptr)
 	struct passwd *pw = (struct passwd *)ptr;
 	free(pw->pw_name);
 	free(pw->pw_passwd);
-	free(pw->pw_gecos);
 	free(pw->pw_shell);
 	free(pw->pw_dir);
 }
@@ -68,10 +67,6 @@ static struct passwd *copy_passwd_entry(struct winbindd_pw *p)
 	if (pw->pw_passwd == NULL) {
 		goto fail;
 	}
-	pw->pw_gecos = strdup(p->pw_gecos);
-	if (pw->pw_gecos == NULL) {
-		goto fail;
-	}
 	pw->pw_shell = strdup(p->pw_shell);
 	if (pw->pw_shell == NULL) {
 		goto fail;
diff --git a/nsswitch/libwbclient/wbc_sid.c b/nsswitch/libwbclient/wbc_sid.c
index aab96cf..6fed2d9 100644
--- a/nsswitch/libwbclient/wbc_sid.c
+++ b/nsswitch/libwbclient/wbc_sid.c
@@ -1054,7 +1054,7 @@ wbcErr wbcCtxGetDisplayName(struct wbcContext *ctx,
 
 		wbcFreeMemory(name);
 
-		name = wbcStrDup(pwd->pw_gecos);
+		name = wbcStrDup(pwd->pw_name);
 		wbcFreeMemory(pwd);
 		BAIL_ON_PTR_ERROR(name, wbc_status);
 	}
diff --git a/nsswitch/winbind_struct_protocol.h b/nsswitch/winbind_struct_protocol.h
index 4a5255c..11fcc4e 100644
--- a/nsswitch/winbind_struct_protocol.h
+++ b/nsswitch/winbind_struct_protocol.h
@@ -23,6 +23,10 @@ typedef char fstring[FSTRING_LEN];
 #ifndef _WINBINDD_NTDOM_H
 #define _WINBINDD_NTDOM_H
 
+#ifdef pw_gecos
+#undef pw_gecos
+#endif
+
 #define WINBINDD_SOCKET_NAME "pipe"            /* Name of PF_UNIX socket */
 
 /* We let the build environment set the public winbindd socket
diff --git a/source3/lib/dumpcore.c b/source3/lib/dumpcore.c
index 0c91206..fa7908e 100644
--- a/source3/lib/dumpcore.c
+++ b/source3/lib/dumpcore.c
@@ -319,7 +319,7 @@ void dump_core_setup(const char *progname, const char *log_file)
 		}
 	}
 
-	umask(~(0700));
+	umask(077);
 	dbgflush();
 
 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
diff --git a/source3/lib/username.c b/source3/lib/username.c
index f69d9c3..3d44129 100644
--- a/source3/lib/username.c
+++ b/source3/lib/username.c
@@ -157,6 +157,8 @@ static struct passwd *Get_Pwnam_internals(TALLOC_CTX *mem_ctx,
 done:
 	DEBUG(5,("Get_Pwnam_internals %s find user [%s]!\n",ret ?
 		 "did":"didn't", user));
+	/* if(ret)
+		DEBUG(5,("Get struct passwd: [%s:%s:%ld:%ld:%s:%s:%s]\n", ret->pw_name ? ret->pw_name : "pw_name == NULL", ret->pw_passwd ? ret->pw_passwd : "pw_passwd == NULL", (long) ret->pw_uid, (long) ret->pw_gid, ret->pw_gecos ? ret->pw_gecos : "pw_gecos == NULL", ret->pw_dir ? ret->pw_dir : "pw_dir == NULL", ret->pw_shell ? ret->pw_shell : "pw_shell == NULL")); */
 
 	return ret;
 }
diff --git a/source3/passdb/passdb.c b/source3/passdb/passdb.c
index 8ed1baf..a66b646 100644
--- a/source3/passdb/passdb.c
+++ b/source3/passdb/passdb.c
@@ -115,6 +115,7 @@ static int count_commas(const char *str)
 {
 	int num_commas = 0;
 	const char *comma = str;
+	if (!str) return 0;
 
 	while ((comma = strchr(comma, ',')) != NULL) {
 		comma += 1;
diff --git a/source4/lib/socket/socket.c b/source4/lib/socket/socket.c
index d7535bf..d54baa6 100644
--- a/source4/lib/socket/socket.c
+++ b/source4/lib/socket/socket.c
@@ -20,9 +20,9 @@
 */
 
 #include "includes.h"
+#include "system/network.h"
 #include "lib/socket/socket.h"
 #include "system/filesys.h"
-#include "system/network.h"
 #include "param/param.h"
 #include "../lib/tsocket/tsocket.h"
 #include "lib/util/util_net.h"
-- 
2.25.1

