From 632cc66ba52eb6aa7fd3e457c64d9186389a20b4 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Fri, 5 Nov 2021 23:14:42 -0400
Subject: change FS calls to use 64-bit interfaces explicitly

Make sure we use 64-bit FS interfaces when accessing the FS.  This
is needed not only to stat or open large files, but even files with
64-bit inodes.

Bug: https://bugs.gentoo.org/583282
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 configure.ac                              |  7 +++++++
 libsandbox/canonicalize.c                 |  8 ++++----
 libsandbox/libsandbox.c                   | 14 +++++++-------
 libsandbox/pre_check_mkdirat.c            |  6 +++---
 libsandbox/trace.c                        |  2 +-
 libsandbox/wrapper-funcs/__wrapper_exec.c |  4 ++--
 libsbutil/include/rcscripts/util/file.h   |  2 +-
 libsbutil/sb_close.c                      |  4 ++--
 libsbutil/src/file.c                      | 24 ++++++++++++------------
 src/namespaces.c                          |  4 ++--
 tests/get-group.c                         |  4 ++--
 tests/get-user.c                          |  4 ++--
 tests/test-skel-0.c                       |  2 +-
 tests/trace-memory_static_tst.c           |  4 ++--
 14 files changed, 48 insertions(+), 41 deletions(-)

diff --git a/configure.ac b/configure.ac
index 56ca87f..698051f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,6 +25,13 @@ AS_IF([test "$ac_cv_prog_cc_c99" = "no"], [AC_MSG_ERROR([A C99+ compiler is requ
 AM_PROG_CC_C_O
 AC_ISC_POSIX
 AC_USE_SYSTEM_EXTENSIONS
+dnl http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
+dnl _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
+dnl _LARGEFILE64_SOURCE: enable support for 64-bit variants (off64_t/fseeko64/etc...)
+dnl NB: We do not want -D_FILE_OFFSET_BITS=64 because we need to interpose both 32-bit
+dnl and 64-bit FS interfaces, and having the C library rewrite them makes that difficult.
+dnl Along those lines, we do not use AC_SYS_LARGEFILE.
+AS_VAR_APPEND([CPPFLAGS], [" -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"])
 
 dnl Checks for programs.
 AM_PROG_AR
diff --git a/libsandbox/canonicalize.c b/libsandbox/canonicalize.c
index 6519340..f742ed4 100644
--- a/libsandbox/canonicalize.c
+++ b/libsandbox/canonicalize.c
@@ -92,7 +92,7 @@ erealpath(const char *name, char *resolved)
 			goto error;
 		}
 
-		/* This stat() business uses relative paths atm */
+		/* This stat business uses relative paths atm. */
 		if (trace_pid)
 			goto no_recover;
 
@@ -100,14 +100,14 @@ erealpath(const char *name, char *resolved)
 		 * If not, try a little harder to consume this path in
 		 * case it has symlinks out into a better world ...
 		 */
-		struct stat st;
-		if (lstat(rpath, &st) == -1 && errno == EACCES) {
+		struct stat64 st;
+		if (lstat64(rpath, &st) == -1 && errno == EACCES) {
 			char *p = rpath;
 			strcpy(rpath, name);
 			do {
 				p = strchr(p, '/');
 				if (p) *p = '\0';
-				if (lstat(rpath, &st))
+				if (lstat64(rpath, &st))
 					break;
 				if (S_ISLNK(st.st_mode)) {
 					ssize_t cnt = readlink(rpath, rpath, path_max);
diff --git a/libsandbox/libsandbox.c b/libsandbox/libsandbox.c
index b4db9ba..0ca2bc9 100644
--- a/libsandbox/libsandbox.c
+++ b/libsandbox/libsandbox.c
@@ -333,7 +333,7 @@ static char *resolve_path(const char *path, int follow_link)
 
 char *egetcwd(char *buf, size_t size)
 {
-	struct stat st;
+	struct stat64 st;
 	char *tmpbuf;
 
 	/* We can't let the C lib allocate memory for us since we have our
@@ -376,12 +376,12 @@ char *egetcwd(char *buf, size_t size)
 	 */
 	if ((tmpbuf) && (errno == 0)) {
 		save_errno();
-		if (!lstat(buf, &st))
+		if (!lstat64(buf, &st))
 			/* errno is set only on failure */
 			errno = 0;
 
 		if (errno == ENOENT)
-			/* If lstat() failed with eerror = ENOENT, then its
+			/* If lstat failed with eerror = ENOENT, then its
 			 * possible that we are running on an older kernel
 			 * which had issues with returning invalid paths if
 			 * they got too long.  Return with errno = ENAMETOOLONG,
@@ -396,8 +396,8 @@ char *egetcwd(char *buf, size_t size)
 				free(buf);
 
 			/* Not sure if we should quit here, but I guess if
-			 * lstat() fails, getcwd could have messed up. Not
-			 * sure what to do about errno - use lstat()'s for
+			 * lstat fails, getcwd could have messed up. Not
+			 * sure what to do about errno - use lstat's for
 			 * now.
 			 */
 			return NULL;
@@ -435,12 +435,12 @@ void __sb_dump_backtrace(void)
 static bool write_logfile(const char *logfile, const char *func, const char *path,
                           const char *apath, const char *rpath, bool access)
 {
-	struct stat log_stat;
+	struct stat64 log_stat;
 	int stat_ret;
 	int logfd;
 	bool ret = false;
 
-	stat_ret = lstat(logfile, &log_stat);
+	stat_ret = lstat64(logfile, &log_stat);
 	/* Do not care about failure */
 	errno = 0;
 	if (stat_ret == 0 && S_ISREG(log_stat.st_mode) == 0)
diff --git a/libsandbox/pre_check_mkdirat.c b/libsandbox/pre_check_mkdirat.c
index 8fb38bb..b1e86cf 100644
--- a/libsandbox/pre_check_mkdirat.c
+++ b/libsandbox/pre_check_mkdirat.c
@@ -36,8 +36,8 @@ bool sb_mkdirat_pre_check(const char *func, const char *pathname, int dirfd)
 	 * not want to pass this attempt up to the higher levels as those
 	 * will trigger a sandbox violation.
 	 */
-	struct stat st;
-	if (0 == lstat(canonic, &st)) {
+	struct stat64 st;
+	if (0 == lstat64(canonic, &st)) {
 		int new_errno;
 		sb_debug_dyn("EARLY FAIL: %s(%s[%s]) @ lstat: %s\n",
 			func, pathname, canonic, strerror(errno));
@@ -45,7 +45,7 @@ bool sb_mkdirat_pre_check(const char *func, const char *pathname, int dirfd)
 		new_errno = EEXIST;
 
 		/* Hmm, is this a broken symlink we're trying to extend ? */
-		if (S_ISLNK(st.st_mode) && stat(pathname, &st) != 0) {
+		if (S_ISLNK(st.st_mode) && stat64(pathname, &st) != 0) {
 			/* XXX: This awful hack should probably be turned into a
 			 * common func that does a better job.  For now, we have
 			 * enough crap to catch gnulib tests #297026.
diff --git a/libsandbox/trace.c b/libsandbox/trace.c
index 036d57f..d70f3bc 100644
--- a/libsandbox/trace.c
+++ b/libsandbox/trace.c
@@ -51,7 +51,7 @@ static int trace_yama_level(void)
 	char ch;
 	int fd, level;
 
-	fd = open("/proc/sys/kernel/yama/ptrace_scope", O_RDONLY | O_CLOEXEC);
+	fd = open64("/proc/sys/kernel/yama/ptrace_scope", O_RDONLY | O_CLOEXEC);
 	if (fd == -1)
 		return 0;
 
diff --git a/libsandbox/wrapper-funcs/__wrapper_exec.c b/libsandbox/wrapper-funcs/__wrapper_exec.c
index d66e3a0..f603257 100644
--- a/libsandbox/wrapper-funcs/__wrapper_exec.c
+++ b/libsandbox/wrapper-funcs/__wrapper_exec.c
@@ -27,7 +27,7 @@ static bool sb_check_exec(const char *filename, char *const argv[])
 {
 	int fd;
 	unsigned char *elf;
-	struct stat st;
+	struct stat64 st;
 	bool do_trace = false;
 	bool run_in_process = true;
 	sandbox_method_t method = get_sandbox_method();
@@ -38,7 +38,7 @@ static bool sb_check_exec(const char *filename, char *const argv[])
 	fd = sb_unwrapped_open_DEFAULT(filename, O_RDONLY|O_CLOEXEC, 0);
 	if (fd == -1)
 		return true;
-	if (fstat(fd, &st))
+	if (fstat64(fd, &st))
 		goto out_fd;
 	if (st.st_size < sizeof(Elf64_Ehdr))
 		goto out_fd;
diff --git a/libsbutil/include/rcscripts/util/file.h b/libsbutil/include/rcscripts/util/file.h
index 197f211..8bbde00 100644
--- a/libsbutil/include/rcscripts/util/file.h
+++ b/libsbutil/include/rcscripts/util/file.h
@@ -23,7 +23,7 @@ bool rc_is_dir (const char *pathname, bool follow_link);
 /* The following functions do not care about errors - it only returns
  * the size/mtime of 'pathname' if it exists, and is the type requested,
  * or else 0. */
-off_t rc_get_size (const char *pathname, bool follow_link);
+off64_t rc_get_size (const char *pathname, bool follow_link);
 
 /* The following return a pointer on success, or NULL with errno set on error.
  * If it returned NULL, but errno is not set, then there was no error, but
diff --git a/libsbutil/sb_close.c b/libsbutil/sb_close.c
index 5379197..113deab 100644
--- a/libsbutil/sb_close.c
+++ b/libsbutil/sb_close.c
@@ -34,7 +34,7 @@ int sb_close(int fd)
 void sb_close_all_fds(void)
 {
 	DIR *dirp;
-	struct dirent *de;
+	struct dirent64 *de;
 	int dfd, fd;
 	const char *fd_dir = sb_get_fd_dir();
 
@@ -43,7 +43,7 @@ void sb_close_all_fds(void)
 		sb_ebort("could not process %s\n", fd_dir);
 	dfd = dirfd(dirp);
 
-	while ((de = readdir(dirp)) != NULL) {
+	while ((de = readdir64(dirp)) != NULL) {
 		if (de->d_name[0] == '.')
 			continue;
 		fd = atoi(de->d_name);
diff --git a/libsbutil/src/file.c b/libsbutil/src/file.c
index a1a4a0e..5a361f4 100644
--- a/libsbutil/src/file.c
+++ b/libsbutil/src/file.c
@@ -21,13 +21,13 @@ rc_file_exists (const char *pathname)
 bool
 rc_is_file (const char *pathname, bool follow_link)
 {
-  struct stat buf;
+  struct stat64 buf;
   int retval;
 
   if (!check_str (pathname))
     return false;
 
-  retval = follow_link ? stat (pathname, &buf) : lstat (pathname, &buf);
+  retval = follow_link ? stat64 (pathname, &buf) : lstat64 (pathname, &buf);
   if ((-1 != retval) && (S_ISREG (buf.st_mode)))
     retval = true;
   else
@@ -39,13 +39,13 @@ rc_is_file (const char *pathname, bool follow_link)
 bool
 rc_is_dir (const char *pathname, bool follow_link)
 {
-  struct stat buf;
+  struct stat64 buf;
   int retval;
 
   if (!check_str (pathname))
     return false;
 
-  retval = follow_link ? stat (pathname, &buf) : lstat (pathname, &buf);
+  retval = follow_link ? stat64 (pathname, &buf) : lstat64 (pathname, &buf);
   if ((-1 != retval) && (S_ISDIR (buf.st_mode)))
     retval = true;
   else
@@ -54,16 +54,16 @@ rc_is_dir (const char *pathname, bool follow_link)
   return retval;
 }
 
-off_t
+off64_t
 rc_get_size (const char *pathname, bool follow_link)
 {
-  struct stat buf;
+  struct stat64 buf;
   int retval;
 
   if (!check_str (pathname))
     return 0;
 
-  retval = follow_link ? stat (pathname, &buf) : lstat (pathname, &buf);
+  retval = follow_link ? stat64 (pathname, &buf) : lstat64 (pathname, &buf);
   if (-1 != retval)
     retval = buf.st_size;
   else
@@ -76,7 +76,7 @@ char **
 rc_ls_dir (const char *pathname, bool hidden, bool sort)
 {
   DIR *dp;
-  struct dirent *dir_entry;
+  struct dirent64 *dir_entry;
   char **dirlist = NULL;
 
   if (!check_arg_str (pathname))
@@ -102,7 +102,7 @@ rc_ls_dir (const char *pathname, bool hidden, bool sort)
     {
       /* Clear errno to distinguish between EOF and error */
       errno = 0;
-      dir_entry = readdir (dp);
+      dir_entry = readdir64 (dp);
       /* Only an error if 'errno' != 0, else EOF */
       if ((NULL == dir_entry) && (0 != errno))
 	{
@@ -184,10 +184,10 @@ error:
 int
 rc_file_map (const char *filename, char **buf, size_t * bufsize)
 {
-  struct stat stats;
+  struct stat64 stats;
   int fd;
 
-  fd = open (filename, O_RDONLY);
+  fd = open64 (filename, O_RDONLY);
   if (fd < 0)
     {
       rc_errno_set (errno);
@@ -195,7 +195,7 @@ rc_file_map (const char *filename, char **buf, size_t * bufsize)
       return -1;
     }
 
-  if (fstat (fd, &stats) < 0)
+  if (fstat64 (fd, &stats) < 0)
     {
       rc_errno_set (errno);
       DBG_MSG ("Failed to stat file!\n");
diff --git a/src/namespaces.c b/src/namespaces.c
index ee9f82a..290111a 100644
--- a/src/namespaces.c
+++ b/src/namespaces.c
@@ -28,7 +28,7 @@
 
 #define xfopen(path, ...) \
 ({ \
-	FILE *_ret = fopen(path, __VA_ARGS__); \
+	FILE *_ret = fopen64(path, __VA_ARGS__); \
 	if (_ret == 0) \
 		sb_perr("fopen(%s) failed", #path); \
 	_ret; \
@@ -107,7 +107,7 @@ static void ns_mount_setup(void)
 	/* Now map in all the files/dirs we do want to expose. */
 	int fd;
 #define bind_file(node) \
-	fd = open("/dev/shm/" node, O_CREAT, 0); \
+	fd = open64("/dev/shm/" node, O_CREAT, 0); \
 	sb_assert(fd != -1); \
 	close(fd); \
 	xmount("/dev/" node, "/dev/shm/" node, NULL, MS_BIND, NULL)
diff --git a/tests/get-group.c b/tests/get-group.c
index 8138967..30cdfc9 100644
--- a/tests/get-group.c
+++ b/tests/get-group.c
@@ -31,8 +31,8 @@ int main(int argc, char *argv[])
 				printf("%i\n", grp->gr_gid);
 			} else {
 				const char *file = argv[1];
-				struct stat st;
-				if (lstat(file, &st))
+				struct stat64 st;
+				if (lstat64(file, &st))
 					errp("lstat(%s) failed", file);
 				printf("%i\n", st.st_gid);
 			}
diff --git a/tests/get-user.c b/tests/get-user.c
index f85e299..be448d7 100644
--- a/tests/get-user.c
+++ b/tests/get-user.c
@@ -31,8 +31,8 @@ int main(int argc, char *argv[])
 				printf("%i\n", pwd->pw_uid);
 			} else {
 				const char *file = argv[1];
-				struct stat st;
-				if (lstat(file, &st))
+				struct stat64 st;
+				if (lstat64(file, &st))
 					errp("lstat(%s) failed", file);
 				printf("%i\n", st.st_uid);
 			}
diff --git a/tests/test-skel-0.c b/tests/test-skel-0.c
index de88cf4..91128d3 100644
--- a/tests/test-skel-0.c
+++ b/tests/test-skel-0.c
@@ -128,7 +128,7 @@ int at_get_fd(const char *str_dirfd)
 	}
 	str_mode = strtok(NULL, ":");
 
-	return open(str_path, f_get_flags(str_flags), sscanf_mode_t(str_mode));
+	return open64(str_path, f_get_flags(str_flags), sscanf_mode_t(str_mode));
 }
 
 #define V_TIMESPEC "NULL | NOW | #[,#]"
diff --git a/tests/trace-memory_static_tst.c b/tests/trace-memory_static_tst.c
index 14c6477..86a47fe 100644
--- a/tests/trace-memory_static_tst.c
+++ b/tests/trace-memory_static_tst.c
@@ -26,7 +26,7 @@ volatile uintptr_t offset = 0;
 #define check_ptr(addr) \
 ({ \
 	printf("  open(%p)\n", addr); \
-	ret = open(non_const_ptr(addr), O_RDONLY); \
+	ret = open64(non_const_ptr(addr), O_RDONLY); \
 	assert(ret == -1 && errno == EFAULT); \
 })
 
@@ -53,7 +53,7 @@ int main(int argc, char *argv[])
 			printf("  open(%p -> %p [+%#zx])\n", p, p + len, len);
 			memset(p, 'a', len);
 			path[end] = '\0';
-			ret = open(p, O_RDONLY);
+			ret = open64(p, O_RDONLY);
 			assert(ret == -1 && (errno == ENOENT || errno == ENAMETOOLONG));
 		}
 	}
-- 
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