diff options
| -rw-r--r-- | libsandbox/libsandbox.c | 9 |
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; |