openssh unix dev - Jan 2002 - ssh-keyscan: xmalloc out of memory error

hi all,

I got "xmalloc: out of memory" when i used
ssh-keyscan to a remote host that is using
SSH protocol 2 and only protocol 2 (no fallback
to SSH protocol 1).

Looks to me more like ssh-keyscan doesn't talk
SSH protocol 2 to the server.

Please help.

Here is the exact error:

# /usr/local/bin/ssh-keyscan -v miad_1
# miad_1 SSH-2.0-OpenSSH_3.0.2p1
xmalloc: out of memory (allocating 1349676920 bytes)
debug1: Calling cleanup 0x4000b7b2(0x0)
debug1: Calling cleanup 0x4000b7da(0x0)
debug1: writing PRNG seed to file //.ssh/prng_seed
# 


Thank you in advance.

-Dat Truong


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fix in current:


Index: ssh-keyscan.c
==================================================================RCS file:
/cvs/src/usr.bin/ssh/ssh-keyscan.c,v
retrieving revision 1.32
retrieving revision 1.33
diff -u -r1.32 -r1.33
--- ssh-keyscan.c	22 Nov 2001 05:27:29 -0000	1.32
+++ ssh-keyscan.c	10 Dec 2001 20:34:31 -0000	1.33
@@ -7,7 +7,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: ssh-keyscan.c,v 1.32 2001/11/22 05:27:29 stevesk Exp
$");
+RCSID("$OpenBSD: ssh-keyscan.c,v 1.33 2001/12/10 20:34:31 markus Exp
$");
 
 #include <sys/queue.h>
 #include <errno.h>
@@ -469,8 +469,9 @@
 congreet(int s)
 {
 	char buf[256], *cp;
+	char remote_version[sizeof buf];
 	size_t bufsiz;
-	int n = 0;
+	int remote_major, remote_minor, n = 0;
 	con *c = &fdcon[s];
 
 	bufsiz = sizeof(buf);
@@ -492,20 +493,21 @@
 		return;
 	}
 	*cp = '\0';
+	if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
+	    &remote_major, &remote_minor, remote_version) == 3)
+		compat_datafellows(remote_version);
+	else
+		datafellows = 0;
 	if (c->c_keytype != KT_RSA1) {
-		int remote_major, remote_minor;
-		char remote_version[sizeof buf];
-
-		if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
-		    &remote_major, &remote_minor, remote_version) == 3)
-			compat_datafellows(remote_version);
-		else
-			datafellows = 0;
 		if (!ssh2_capable(remote_major, remote_minor)) {
 			debug("%s doesn't support ssh2", c->c_name);
 			confree(s);
 			return;
 		}
+	} else if (remote_major != 1) {
+		debug("%s doesn't support ssh1", c->c_name);
+		confree(s);
+		return;
 	}
 	fprintf(stderr, "# %s %s\n", c->c_name, chop(buf));
 	n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",

Hi,

Does anybody know the intention of scp -B?
Is it for batch mode processing?  I assume
that it does not require an ssh agent running.

Please help.  Many thanks in advance.

-Dat Truong

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