iptables-restore: fix segmentation fault with -tanything
Reference: Debian bug #458042
iptables-restore must not pass a table into do_command. It checks for
"-t arg" and "--table arg", but not "-targ". (On a related note,
using -targ does not work as expected).
This should fail gracefully, but crashes:
iptables-restore <(echo -e '*filter\n-A INPUT -tx\nCOMMIT')
And this should use table "filter", or perhaps raise an error, but
instead sets the table to (literally) "-tfilter":
iptables -tfilter -A INPUT
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/ip6tables-restore.c b/ip6tables-restore.c
index cd6dd03..f51e38f 100644
--- a/ip6tables-restore.c
+++ b/ip6tables-restore.c
@@ -406,7 +406,7 @@
param_buffer[param_len] = '\0';
/* check if table name specified */
- if (!strncmp(param_buffer, "-t", 3)
+ if (!strncmp(param_buffer, "-t", 2)
|| !strncmp(param_buffer, "--table", 8)) {
exit_error(PARAMETER_PROBLEM,
"Line %u seems to have a "