From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5920A6AA0; Tue, 5 Dec 2023 03:21:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="KT3KqO3K" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF6D6C433C8; Tue, 5 Dec 2023 03:21:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1701746476; bh=Bb7TZIarwP7GL3snKNUejHBfIPik4RWV2JJy6QaqZqI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KT3KqO3KV6guYWUDcMeKNJH3fjyTNo5j7YLSC4hMpoAvzKqBioFXoCpzTQFgFULxC U5+hn2mqxnQOMgqdKJ7rMjJv1ufCQtbwDJcP5chfYwiyA1xmNbkfYUlHdcev+nIKEI myi51PXRJ8adkr+AZVjE3buxcnN1nYepMqSlhZ7I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wu Bo , Mikulas Patocka , Mike Snitzer Subject: [PATCH 6.6 037/134] dm verity: initialize fec io before freeing it Date: Tue, 5 Dec 2023 12:15:09 +0900 Message-ID: <20231205031537.850673938@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231205031535.163661217@linuxfoundation.org> References: <20231205031535.163661217@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wu Bo commit 7be05bdfb4efc1396f7692562c7161e2b9f595f1 upstream. If BIO error, verity_end_io() can call verity_finish_io() before verity_fec_init_io(). Therefore, fec_io->rs is not initialized and may crash when doing memory freeing in verity_fec_finish_io(). Crash call stack: die+0x90/0x2b8 __do_kernel_fault+0x260/0x298 do_bad_area+0x2c/0xdc do_translation_fault+0x3c/0x54 do_mem_abort+0x54/0x118 el1_abort+0x38/0x5c el1h_64_sync_handler+0x50/0x90 el1h_64_sync+0x64/0x6c free_rs+0x18/0xac fec_rs_free+0x10/0x24 mempool_free+0x58/0x148 verity_fec_finish_io+0x4c/0xb0 verity_end_io+0xb8/0x150 Cc: stable@vger.kernel.org # v6.0+ Fixes: 5721d4e5a9cd ("dm verity: Add optional "try_verify_in_tasklet" feature") Signed-off-by: Wu Bo Reviewed-by: Mikulas Patocka Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-verity-target.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -642,7 +642,6 @@ static void verity_work(struct work_stru io->in_tasklet = false; - verity_fec_init_io(io); verity_finish_io(io, errno_to_blk_status(verity_verify_io(io))); } @@ -792,6 +791,8 @@ static int verity_map(struct dm_target * bio->bi_private = io; io->iter = bio->bi_iter; + verity_fec_init_io(io); + verity_submit_prefetch(v, io); submit_bio_noacct(bio);