From nobody Mon Jun 22 06:41:57 2026 Received: from mail-gw02.astralinux.ru (mail-gw02.astralinux.ru [93.188.205.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D2922E6CB8; Fri, 19 Jun 2026 09:25:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=93.188.205.243 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781861108; cv=none; b=bj9SEGJVqQz5xZUXb5P6KSDvDvkDoEHYlBtExA2lJHTJtas508Muw40fKU5DS0oJx/tZduf4qwFpPB/Y9WRGmeP0TNzM5KHoZeTUcQwJMO5+O/dv24OprhXsESedcZ74XM8/CwQyCgV/ugPqJlawKpDH2n403+WJicp32LaNEQ0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781861108; c=relaxed/simple; bh=NPdCIlVBxk6IZFlI3QELtBBymmuObA2TL9GfWuwRbW4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=tP0b2VCwjPzAsnm19oUGCT8ILCcCJd45IMRc5twhQHIt2DnX0fMgjMYyXK2FgNyux1rss9bdku3xD3Nl+xKhnV7ISl2O3qkmfx3PfT8pdldbR3m18MBQeo2kjzAKgPqH0uNI16Hwq4IZ0hCocNVe71jKxBa92NRHXgeuS3lZ2pM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=astralinux.ru; spf=pass smtp.mailfrom=astralinux.ru; dkim=pass (2048-bit key) header.d=astralinux.ru header.i=@astralinux.ru header.b=qjzf1dx1; arc=none smtp.client-ip=93.188.205.243 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=astralinux.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=astralinux.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=astralinux.ru header.i=@astralinux.ru header.b="qjzf1dx1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=astralinux.ru; s=mail; t=1781861094; bh=NPdCIlVBxk6IZFlI3QELtBBymmuObA2TL9GfWuwRbW4=; h=From:To:Cc:Subject:Date:From; b=qjzf1dx1H0321OrgxAFYySl6erG9WCivRQGSrwrgt040ly4g8Y3sf38SO2hRNFC22 00OYW14t7NEcCuN+xibH8S8Dv+e19ZjX8BCKDfTzlSUzQX+9Y17wQwqL/rtZ39J3OL FcuN3Brj3z+BmyJbkGkTBYpxPG3keqvgnUYufj3vxfLzpz5dwHpSw51WZFxrJX/Ko8 xouYftgx1jUuLtbeWQZA/dqJLyMplXgOkFjbGsKZLFU9S+rOZC5EVdyhEUAHuddTHM EYKORSQio/vAnDw3puBqTvRi1kql9tNsbJWLd1MG6mO+GGHmUweGpwuINOoMfgaqqW sJa8vqv+/iUXg== Received: from gca-msk-a-srv-ksmg01.astralinux.ru (localhost [127.0.0.1]) by mail-gw02.astralinux.ru (Postfix) with ESMTP id 24EF01F96E; Fri, 19 Jun 2026 12:24:54 +0300 (MSK) Received: from new-mail.astralinux.ru (unknown [10.205.207.8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail-gw02.astralinux.ru (Postfix) with ESMTPS; Fri, 19 Jun 2026 12:24:50 +0300 (MSK) Received: from rbta-msk-lt-169874.astralinux.ru (unknown [10.198.51.153]) by new-mail.astralinux.ru (Postfix) with ESMTPA id 4ghXHQ0J2vzZdxN; Fri, 19 Jun 2026 12:24:49 +0300 (MSK) From: Mikhail Dmitrichenko To: stable@vger.kernel.org, Greg Kroah-Hartman Cc: Mikhail Dmitrichenko , Jakub Kicinski , "David S. Miller" , Jiri Pirko , Ido Schimmel , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Lunn , Eric Dumazet , Paolo Abeni , Jiri Pirko , lvc-project@linuxtesting.org, Wang Yufen Subject: [PATCH 5.10] netdevsim: Fix memory leak of nsim_dev->fa_cookie Date: Fri, 19 Jun 2026 12:15:06 +0300 Message-Id: <20260619091507.95142-1-mdmitrichenko@astralinux.ru> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-KSMG-AntiPhishing: NotDetected, bases: 2026/06/19 08:52:00 X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Envelope-From: mdmitrichenko@astralinux.ru X-KSMG-AntiSpam-Info: LuaCore: 108 0.3.108 b3af89ff4c48cefaff455d02ab4cd72c6de3312f, {Tracking_uf_ne_domains}, {Tracking_internal2}, {Tracking_from_domain_doesnt_match_to}, d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;new-mail.astralinux.ru:7.1.1;lore.kernel.org:7.1.1;127.0.0.199:7.1.2;astralinux.ru:7.1.1, FromAlignment: s X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiSpam-Lua-Profiles: 203942 [Jun 19 2026] X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Version: 6.1.1.22 X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.1.0.7854, bases: 2026/06/19 05:29:00 #28253113 X-KSMG-AntiVirus-Status: NotDetected, skipped X-KSMG-LinksScanning: NotDetected, bases: 2026/06/19 08:16:00 X-KSMG-Message-Action: skipped X-KSMG-Rule-ID: 1 Content-Type: text/plain; charset="utf-8" From: Wang Yufen commit 064bc7312bd09a48798418663090be0c776183db upstream. kmemleak reports this issue: unreferenced object 0xffff8881bac872d0 (size 8): comm "sh", pid 58603, jiffies 4481524462 (age 68.065s) hex dump (first 8 bytes): 04 00 00 00 de ad be ef ........ backtrace: [<00000000c80b8577>] __kmalloc+0x49/0x150 [<000000005292b8c6>] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsi= m] [<0000000093d78e77>] full_proxy_write+0xf3/0x180 [<000000005a662c16>] vfs_write+0x1c5/0xaf0 [<000000007aabf84a>] ksys_write+0xed/0x1c0 [<000000005f1d2e47>] do_syscall_64+0x3b/0x90 [<000000006001c6ec>] entry_SYSCALL_64_after_hwframe+0x63/0xcd The issue occurs in the following scenarios: nsim_dev_trap_fa_cookie_write() kmalloc() fa_cookie nsim_dev->fa_cookie =3D fa_cookie .. nsim_drv_remove() The fa_cookie allocked in nsim_dev_trap_fa_cookie_write() is not freed. To fix, add kfree(nsim_dev->fa_cookie) to nsim_drv_remove(). Fixes: d3cbb907ae57 ("netdevsim: add ACL trap reporting cookie as a metadat= a") Signed-off-by: Wang Yufen Cc: Jiri Pirko Link: https://lore.kernel.org/r/1668504625-14698-1-git-send-email-wangyufen= @huawei.com Signed-off-by: Jakub Kicinski [ The context change is due to the commit 5e388f3dc38c ("netdevsim: move vfconfig to nsim_dev") in v5.16 which is irrelevant to the logic of this patch. ] Signed-off-by: Mikhail Dmitrichenko --- Backport fix for CVE-2022-49803 drivers/net/netdevsim/dev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c index c8834ea84732..a106365ce485 100644 --- a/drivers/net/netdevsim/dev.c +++ b/drivers/net/netdevsim/dev.c @@ -1173,6 +1173,7 @@ void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_de= v) ARRAY_SIZE(nsim_devlink_params)); devlink_unregister(devlink); devlink_resources_unregister(devlink, NULL); + kfree(nsim_dev->fa_cookie); devlink_free(devlink); } =20 --=20 2.47.3