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-rw-r--r--libsandbox/libsandbox.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/libsandbox/libsandbox.c b/libsandbox/libsandbox.c
index 4edcf60..6a7368c 100644
--- a/libsandbox/libsandbox.c
+++ b/libsandbox/libsandbox.c
@@ -132,24 +132,25 @@ int resolve_dirfd_path(int dirfd, const char *path, char *resolved_path,
save_errno();
+ char fd_path[SB_PATH_MAX];
size_t at_len = resolved_path_len - 1 - 1 - (path ? strlen(path) : 0);
if (trace_pid) {
- sprintf(resolved_path, "/proc/%i/fd/%i", trace_pid, dirfd);
+ sprintf(fd_path, "/proc/%i/fd/%i", trace_pid, dirfd);
} else {
/* If /proc was mounted by a process in a different pid namespace,
* getpid cannot be used to create a valid /proc/<pid> path. Instead
* use sb_get_fd_dir() which works in any case.
*/
- sprintf(resolved_path, "%s/%i", sb_get_fd_dir(), dirfd);
+ sprintf(fd_path, "%s/%i", sb_get_fd_dir(), dirfd);
}
- ssize_t ret = readlink(resolved_path, resolved_path, at_len);
+ ssize_t ret = readlink(fd_path, resolved_path, at_len);
if (ret == -1) {
/* see comments at end of check_syscall() */
if (errno_is_too_long()) {
restore_errno();
return 2;
}
- sb_debug_dyn("AT_FD LOOKUP fail: %s: %s\n", resolved_path, strerror(errno));
+ sb_debug_dyn("AT_FD LOOKUP fail: %s: %s\n", fd_path, strerror(errno));
/* If the fd isn't found, some guys (glibc) expect errno */
if (errno == ENOENT)
errno = EBADF;