From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out203-205-251-27.mail.qq.com (out203-205-251-27.mail.qq.com [203.205.251.27]) (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 9980B180A8D for ; Wed, 17 Jul 2024 14:07:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.205.251.27 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721225263; cv=none; b=sGEsOy20z6j4d/Wa6Dnel24oWS6UVZgKHji8p2FmVqx7pfmQmmmwVE6U+iV4FeIfjoVIhnSkCnyPsVLSOWhaAMypYgoWJC10AiYBjL9F9nJ5Sd7rl2soF6fomF/fjwG3CQlnLHMi0vt2WFbEk7y7kBoL8mzOq5ytLrzbe+HA4FM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721225263; c=relaxed/simple; bh=AqCrMHZBXwRtgtHbnOQAodBSHRjR5Q5zKah1DXMJkAk=; h=Message-ID:From:To:Cc:Subject:Date:In-Reply-To:References: MIME-Version; b=qyb+l61iy+AOsGgC8g1Az8NtH44J2HLAMxEOYwMwpl/KTKp1FobTx6aGaEopCEv+9REx3w7TkcIVG5SVAnyEZjutX1K2PxjSUDwZiaVpqwtVSEgvtPgohXxjFUhBYkq0jR9bLxSEDOdP6jNKzQPahmT2D7izLqcqRGAUozK3Gx8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com; spf=pass smtp.mailfrom=qq.com; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b=FvViwRNj; arc=none smtp.client-ip=203.205.251.27 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="FvViwRNj" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1721225253; bh=hVyJqvtIEF/m5oTTsZxWCsNvVWrQ/+CiGoh7OG2yugU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=FvViwRNjmWb0g/bdgC7UyeeQ6eYVGDOKecb1+que8mz+Fx5tWvTSPQvnAtlbJu0L/ qgRhlRrnz6Po3H0egLnIG2joDu0va5CtNlQd+YFmJ/AHrcQYSEJ3XOY3vDQ95VAVYI GuLqeWkrAlGksnXDHcHeNgiG4u4sFs/Gdn5qFhww= Received: from pek-lxu-l1.wrs.com ([111.198.228.103]) by newxmesmtplogicsvrsza29-0.qq.com (NewEsmtp) with SMTP id 1DF03245; Wed, 17 Jul 2024 22:07:31 +0800 X-QQ-mid: xmsmtpt1721225251to9dmle2m Message-ID: X-QQ-XMAILINFO: NWOHIAASQnT+vEOUm4bzfN6+4qQmIkl2FL9RYswPTa+P7xj0IOOQKtW2MGtxq2 n2td4bgypzJWkQ37nnl1C134e9NglxZN6AJBAhvlvzyCN/o4nSgtTnf71q9xBDrqXblAn678s2SF Lgnbci7yI3IhOcBD8rcYh1Wv2AV97yR+FSs5xhY0BbGjZEOaerfu9HfBBg4zUA0wStSjojVwr2cu vu/NFCOjWLkQkGH96RgJXZK3oLYNIERVaPYVCT0Ol9tSYfwcqtQZiUGVxZFu2M6xfhwhTyzuSdZS w8QUSJCBBHueoBf5GEOHcGMIbIwaj/yFDfw4Tsev0eUbK+g8szrxcdTusmxQlvmOOg9prK+MiB2V MGY4ndsCEYx5CYUkBqP7YREeTuNOvDA8NmLZ5GoPaG+niKGrzpUASsq4ld9jLArofxU/scUVRtH8 /2O80CnFIjQNW5/matji8FHfCD3KBswH/4NH6+WOllQ6XLFpCTSNnSvyozLKVCw/qzjrY3qb1qas rkkpVEdQQqGhUT2wBvN1nlNuHJ7VwsZ/nbkHTlBWs7zIYOygXj7dRVrNPdw12drpUW9VPYCAVmwD NZoWPWvsfpcnGsbmRXLHowfDrAcWb73ROaVEGr1vK/CKK2oKEovtKiL6RD9/forAIiEZsqCzSJmi nnl14rt94aKWdMk9JXEo+8wg/Bc3FOjT3pXBA9SSQJ8ibG4J50q4bZ5qMV81mUzepqLlnClLZHEk JTmfrORFRs2MuS0s67aCYWLhtvjaSkrUQYnU7OezYlxztRq5NScSb2gdu1RGnTOZc9FfIaRN2BZH GDZ8P7SQGhC030M4f+MAroEJZvyRabFIksQUUrwpKL56UHzGhZO0KFhUZKnLkYvqM2kCA2XfgURK SZn8bWklzNf/UmXN5GNZXQc0eom/WyDCQcMdoaMkqvFiuXnkDBbuodvVCYpDCIAfYhHWfzYSXmox IUq3fKzv3U80LsaX6O7A== X-QQ-XMRINFO: MSVp+SPm3vtS1Vd6Y4Mggwc= From: Edward Adam Davis To: syzbot+d5dc2801166df6d34774@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [fs?] KASAN: slab-use-after-free Read in lockref_get Date: Wed, 17 Jul 2024 22:07:26 +0800 X-OQ-MSGID: <20240717140725.762126-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <0000000000005c6453061d53bc0f@google.com> References: <0000000000005c6453061d53bc0f@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit before remove debugfs_dir set reference pointer to NULL #syz test: linux-next 58f9416d413a diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c index fe868b521622..5e0f909d4c76 100644 --- a/net/mac80211/driver-ops.c +++ b/net/mac80211/driver-ops.c @@ -113,13 +113,9 @@ void drv_remove_interface(struct ieee80211_local *local, if (!check_sdata_in_driver(sdata)) return; - sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; - - /* Remove driver debugfs entries */ - ieee80211_debugfs_recreate_netdev(sdata, sdata->vif.valid_links); - trace_drv_remove_interface(local, sdata); local->ops->remove_interface(&local->hw, &sdata->vif); + sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; trace_drv_return_void(local); }