tftpd: chroot to DIR, not merely chdir. Closes 4874

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/networking/tftp.c b/networking/tftp.c
index 043b879af..ce48a1edd 100644
--- a/networking/tftp.c
+++ b/networking/tftp.c
@@ -789,8 +789,9 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
                 openlog(applet_name, LOG_PID, LOG_DAEMON);
                 logmode = LOGMODE_SYSLOG;
         }
-        if (argv[0])
-                xchdir(argv[0]);
+        if (argv[0]) {
+                xchroot(argv[0]);
+        }
 
         result = recv_from_to(STDIN_FILENO, block_buf, sizeof(block_buf),
                         0 /* flags */,