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upstream commit 

fix use-after-free in ~^Z escape handler path, introduced
in channels.c refactor; spotted by millert@ "makes sense" deraadt@

Upstream-ID: 8fa2cdc65c23ad6420c1e59444b0c955b0589b22
This commit is contained in:
djm@openbsd.org 2017-09-19 04:24:22 +00:00 committed by Damien Miller
parent a3839d8d2b
commit 5b8da1f538
1 changed files with 4 additions and 13 deletions
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17
clientloop.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: clientloop.c,v 1.304 2017/09/12 06:35:32 djm Exp $ */
/* $OpenBSD: clientloop.c,v 1.305 2017/09/19 04:24:22 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -600,13 +600,9 @@ client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
/*
* Free (and clear) the buffer to reduce the amount of data that gets
* written to swap.
*/
buffer_free(bin);
buffer_free(bout);
buffer_free(berr);
sshbuf_reset(bin);
sshbuf_reset(bout);
sshbuf_reset(berr);
/* Send the suspend signal to the program itself. */
kill(getpid(), SIGTSTP);
@ -614,11 +610,6 @@ client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
/* Reset window sizes in case they have changed */
received_window_change_signal = 1;
/* OK, we have been continued by the user. Reinitialize buffers. */
buffer_init(bin);
buffer_init(bout);
buffer_init(berr);
enter_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
}