nftables/SOURCES/0008-netlink-Fix-leak-in-unterminated-string-deserializer.patch

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2020-08-10 18:25:43 +00:00
From cc70f19e588a0a33ed86c4a059b56a8f5b0c7a82 Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Mon, 27 Jan 2020 16:11:41 +0100
Subject: [PATCH] netlink: Fix leak in unterminated string deserializer
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1793030
Upstream Status: nftables commit c3f6be3f2dced
commit c3f6be3f2dcedf6d79751c0b975315ebc3184364
Author: Phil Sutter <phil@nwl.cc>
Date: Mon Jan 20 13:52:10 2020 +0100
netlink: Fix leak in unterminated string deserializer
Allocated 'mask' expression is not freed before returning to caller,
although it is used temporarily only.
Fixes: b851ba4731d9f ("src: add interface wildcard matching")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
src/netlink_delinearize.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c
index 154353b..06a0312 100644
--- a/src/netlink_delinearize.c
+++ b/src/netlink_delinearize.c
@@ -2030,7 +2030,7 @@ static bool __expr_postprocess_string(struct expr **exprp)
static struct expr *expr_postprocess_string(struct expr *expr)
{
- struct expr *mask;
+ struct expr *mask, *out;
assert(expr_basetype(expr)->type == TYPE_STRING);
if (__expr_postprocess_string(&expr))
@@ -2040,7 +2040,9 @@ static struct expr *expr_postprocess_string(struct expr *expr)
BYTEORDER_HOST_ENDIAN,
expr->len + BITS_PER_BYTE, NULL);
mpz_init_bitmask(mask->value, expr->len);
- return string_wildcard_expr_alloc(&expr->location, mask, expr);
+ out = string_wildcard_expr_alloc(&expr->location, mask, expr);
+ expr_free(mask);
+ return out;
}
static void expr_postprocess(struct rule_pp_ctx *ctx, struct expr **exprp)
--
2021-10-15 16:34:47 +00:00
2.31.1
2020-08-10 18:25:43 +00:00