From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A07FCEC873D for ; Thu, 7 Sep 2023 15:45:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=TzsKaIa/51Upcj8HvZrjwotWDsLTt+VSymAj0w/VlnM=; b=fyoNwwwOjc+m/s lwFTs27vJvZuvW+FqHSrU5nOMc3PdxLaKsaQFqOuoQO6eiA3LF6xzQSw6lR0dcScBvnSRKydGFIbf 7iCNewBuYYjQ1oDGntMnT090OT2vtAeuWgqOBONCwK5NDY+Zd3LSw/Qdbiz039z9emfkkTXpkTCnq M3DVXZGmVxVYk1tSAzZqPX+tUdjv7Fd/qO4UglnPJ9ClHe1/yvJCB6cZ4IFUT+k6rwzYmvo6RPvF6 9lMnGizT/kQzvFbNVkq0yWjSQdGr498GolFvtB8jlxI1BVMlydMHvHMwNAdiI0TiYjnC1oGnqOyaY yBpYWRihPuW5dPGz7p0w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qeHBL-00CJjN-22; Thu, 07 Sep 2023 15:44:35 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qeHBI-00CJhZ-1g; Thu, 07 Sep 2023 15:44:34 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 142E7B81E7F; Thu, 7 Sep 2023 15:44:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6746CC4E67B; Thu, 7 Sep 2023 15:44:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1694101469; bh=/90n+yBHs+nBlvmbMDViQCzRtfY37asFoB0k3l1ZX7U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bgixuuQNyTN3cYUDKPhhQxUebaIjXKlciKPEZzbXVg8dP0blMa6QxtMpdz1bJWcKm 9LontNFd+O/xXd8nsTAk+9UjSqnNutl4kIGb6eXOAfw7I4219i16at+UjKPeHlNiIN argauBNoWhZgjhblWbqhDzc1sso6/DDz9SxmGJvQYxHioX60bI3LccRUQLMUlHJzD/ qnnyRJQDShdcMypD/D2Kg1JR97tzypVWhed35KReSERqk6fyR60K/rRA6zIqNdfwX3 ZPJHG+tWbEbEs0brhgIcDXJMQcn9B06T7XJOGXILMLvZ6LaEkvh07HkeKUp8kil9lf 11vS79+Qhz+3Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Will Shiu , Jeff Layton , Sasha Levin , viro@zeniv.linux.org.uk, brauner@kernel.org, chuck.lever@oracle.com, matthias.bgg@gmail.com, linux-fsdevel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 3/3] locks: fix KASAN: use-after-free in trace_event_raw_event_filelock_lock Date: Thu, 7 Sep 2023 11:44:23 -0400 Message-Id: <20230907154423.3422014-3-sashal@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230907154423.3422014-1-sashal@kernel.org> References: <20230907154423.3422014-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.4.256 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230907_084432_861359_E92EE26F X-CRM114-Status: GOOD ( 12.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Will Shiu [ Upstream commit 74f6f5912693ce454384eaeec48705646a21c74f ] As following backtrace, the struct file_lock request , in posix_lock_inode is free before ftrace function using. Replace the ftrace function ahead free flow could fix the use-after-free issue. [name:report&]=============================================== BUG:KASAN: use-after-free in trace_event_raw_event_filelock_lock+0x80/0x12c [name:report&]Read at addr f6ffff8025622620 by task NativeThread/16753 [name:report_hw_tags&]Pointer tag: [f6], memory tag: [fe] [name:report&] BT: Hardware name: MT6897 (DT) Call trace: dump_backtrace+0xf8/0x148 show_stack+0x18/0x24 dump_stack_lvl+0x60/0x7c print_report+0x2c8/0xa08 kasan_report+0xb0/0x120 __do_kernel_fault+0xc8/0x248 do_bad_area+0x30/0xdc do_tag_check_fault+0x1c/0x30 do_mem_abort+0x58/0xbc el1_abort+0x3c/0x5c el1h_64_sync_handler+0x54/0x90 el1h_64_sync+0x68/0x6c trace_event_raw_event_filelock_lock+0x80/0x12c posix_lock_inode+0xd0c/0xd60 do_lock_file_wait+0xb8/0x190 fcntl_setlk+0x2d8/0x440 ... [name:report&] [name:report&]Allocated by task 16752: ... slab_post_alloc_hook+0x74/0x340 kmem_cache_alloc+0x1b0/0x2f0 posix_lock_inode+0xb0/0xd60 ... [name:report&] [name:report&]Freed by task 16752: ... kmem_cache_free+0x274/0x5b0 locks_dispose_list+0x3c/0x148 posix_lock_inode+0xc40/0xd60 do_lock_file_wait+0xb8/0x190 fcntl_setlk+0x2d8/0x440 do_fcntl+0x150/0xc18 ... Signed-off-by: Will Shiu Signed-off-by: Jeff Layton Signed-off-by: Sasha Levin --- fs/locks.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/locks.c b/fs/locks.c index b8a31c1c4fff3..90f92784aa554 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1338,6 +1338,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request, out: spin_unlock(&ctx->flc_lock); percpu_up_read(&file_rwsem); + trace_posix_lock_inode(inode, request, error); /* * Free any unused locks. */ @@ -1346,7 +1347,6 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request, if (new_fl2) locks_free_lock(new_fl2); locks_dispose_list(&dispose); - trace_posix_lock_inode(inode, request, error); return error; } -- 2.40.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel