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When using the escape sequence &~ the code path is
client_loop() -> client_simple_escape_filter() -> process_escapes() -> fork()
and the pledge for this path lacks the proc promise and therefore aborts the
process. The solution is to just add proc the promise to this specific
pledge.

Reported by Gregoire Jadi gjadi ! omecha.info
Insight with tb@, OK jca@

Upstream-ID: 63c05e30c28209519f476023b65b0b1b0387a05b
This commit is contained in:
mestre@openbsd.org 2017-06-23 07:24:48 +00:00 committed by Damien Miller
parent 5abbb31c4e
commit e238645d78
1 changed files with 2 additions and 2 deletions
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4
clientloop.c
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@ -1,4 +1,4 @@
/* $OpenBSD: clientloop.c,v 1.299 2017/05/31 09:15:42 deraadt Exp $ */
/* $OpenBSD: clientloop.c,v 1.300 2017/06/23 07:24:48 mestre Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -1255,7 +1255,7 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
} else {
debug("pledge: network");
if (pledge("stdio unix inet dns tty", NULL) == -1)
if (pledge("stdio unix inet dns proc tty", NULL) == -1)
fatal("%s pledge(): %s", __func__, strerror(errno));
}