From nobody Mon Nov 25 20:36:59 2024 Received: from mail-pj1-f52.google.com (mail-pj1-f52.google.com [209.85.216.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E7CF1F7547 for ; Fri, 25 Oct 2024 13:12:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729861934; cv=none; b=tIaDlY6+JKvC6rvtpAYWwg/MhfoE90I9Pggojy3Bu1n4MjwGg9+URujF/S0G5DLbJqvH+QQHLQJdGl81bFIDN5jI7apljXa/IhKewl1ZC/6aPGWacfNBnOX2qT07SME56HX3mm7q8L8Axll+sTOW9RAJcd2yLY3mIm3851QgsfU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729861934; c=relaxed/simple; bh=sK3GReGrrBIZCIcruu3To61mhXqDKeErWsYmv/yiG9M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=q/EPmb32nTzipKHysvcyzZGWS6+TDaE+tnq9UVVP+8uciYjcX05cBKPVmLvIc02Vh18Y4fzmW+W4or5N3sGq/PhODQDZSPSjuyAbGood1D4QWEZvX0BDfgzavtsAsMELk9SbnFlVccXUGELcFvFiaZJarCuI4HSBK1ks3rytDDQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=SoSDaIIy; arc=none smtp.client-ip=209.85.216.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="SoSDaIIy" Received: by mail-pj1-f52.google.com with SMTP id 98e67ed59e1d1-2e2dc61bc41so1447421a91.1 for ; Fri, 25 Oct 2024 06:12:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1729861932; x=1730466732; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=MZm7zndLXna2WAoQucoUjtozEIUfuaspQMegms8BWLo=; b=SoSDaIIyuvaFIf5pTMg1FLsw1ztrEeNDjzJen0k/DM/o7Q8MBt6Ez3bPLtpvbRk26b oprF95gouq1/QJB6Ozv2JVFHa9GD9qys7k6nfrQ0WdvzfRIax5dmI69LjfIbLVUQmWVY weGooC078WXi5e7XC6qZ1CQLM9JoPa+SHhIIk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729861932; x=1730466732; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=MZm7zndLXna2WAoQucoUjtozEIUfuaspQMegms8BWLo=; b=LM5yXDpCjrtvNmTF4iqAmcSEuiMBwpCU+6uNidOo6cTO4PP41vCQ7mXgvlaV4Zalea 8OwhxM+AA9kmcVl/YA9yz9KBgY1eoVciSxPbxNmHSS6uYaOE9fAfT5+ckX2RagNLpknz rvVg7lMeXHEKl9jw3RMqIldKU7wQTjWEjfkq65rIfGkre9+Vlkoz1AdUSpKW7tg6flsm /B8gg9us60u7q1xRYGohT7cN6DvJo+o4VaWbqu04vGqXBDgSwezhutfiQ3ztZLr1153h qXVksgsMM896pIme2MdRgMYT0SMzlw5YnUfSO0D3o7cKGL2IbIw1chBn1HTWsDGlgVkS LjFw== X-Forwarded-Encrypted: i=1; AJvYcCXLlig7fj6O7ZmHLutriwqFtv2m3l+unUkpBnJF1PxamnWxLlMD4N9aNvxRVeUoduf3lVd7H+JkMWnXvg0=@vger.kernel.org X-Gm-Message-State: AOJu0YxOhG3xRKbm/oheXnLTgM2pCS6HWlaER7XAF4ND4Z3leEyh/8wt VHkjuFfMiSaHqz+enh8QMT46esd7MXy6LSIhcvQpMzIvp5g/b9Ysfd1s0JyeNA== X-Google-Smtp-Source: AGHT+IEQ2XpAY9n7QIqX0r9kvE73jPr3/aXCQVgzyfAW/wHaR3nIqmGI0xRKscd241HslAx3ryrPzQ== X-Received: by 2002:a17:90a:130d:b0:2e0:9a63:9017 with SMTP id 98e67ed59e1d1-2e76b60beb6mr10977290a91.23.1729861931735; Fri, 25 Oct 2024 06:12:11 -0700 (PDT) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:bd37:bccf:f3e:a9ef]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e8e3556517sm1364203a91.8.2024.10.25.06.12.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Oct 2024 06:12:11 -0700 (PDT) From: Sergey Senozhatsky To: Stanimir Varbanov , Vikash Garodia Cc: Dikshita Agarwal , Bryan O'Donoghue , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: [PATCHv5 2/3] media: venus: sync with threaded IRQ during inst destruction Date: Fri, 25 Oct 2024 22:11:50 +0900 Message-ID: <20241025131200.747889-3-senozhatsky@chromium.org> X-Mailer: git-send-email 2.47.0.163.g1226f6d8fa-goog In-Reply-To: <20241025131200.747889-1-senozhatsky@chromium.org> References: <20241025131200.747889-1-senozhatsky@chromium.org> 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 Content-Type: text/plain; charset="utf-8" When destroying an inst we should make sure that we don't race against threaded IRQ (or pending IRQ), otherwise we can concurrently kfree() inst context and inst itself. BUG: KASAN: slab-use-after-free in vb2_queue_error+0x80/0x90 Call trace: dump_backtrace+0x1c4/0x1f8 show_stack+0x38/0x60 dump_stack_lvl+0x168/0x1f0 print_report+0x170/0x4c8 kasan_report+0x94/0xd0 __asan_report_load2_noabort+0x20/0x30 vb2_queue_error+0x80/0x90 venus_helper_vb2_queue_error+0x54/0x78 venc_event_notify+0xec/0x158 hfi_event_notify+0x878/0xd20 hfi_process_msg_packet+0x27c/0x4e0 venus_isr_thread+0x258/0x6e8 hfi_isr_thread+0x70/0x90 venus_isr_thread+0x34/0x50 irq_thread_fn+0x88/0x130 irq_thread+0x160/0x2c0 kthread+0x294/0x328 ret_from_fork+0x10/0x20 Allocated by task 20291: kasan_set_track+0x4c/0x80 kasan_save_alloc_info+0x28/0x38 __kasan_kmalloc+0x84/0xa0 kmalloc_trace+0x7c/0x98 v4l2_m2m_ctx_init+0x74/0x280 venc_open+0x444/0x6d0 v4l2_open+0x19c/0x2a0 chrdev_open+0x374/0x3f0 do_dentry_open+0x710/0x10a8 vfs_open+0x88/0xa8 path_openat+0x1e6c/0x2700 do_filp_open+0x1a4/0x2e0 do_sys_openat2+0xe8/0x508 do_sys_open+0x15c/0x1a0 __arm64_sys_openat+0xa8/0xc8 invoke_syscall+0xdc/0x270 el0_svc_common+0x1ec/0x250 do_el0_svc+0x54/0x70 el0_svc+0x50/0xe8 el0t_64_sync_handler+0x48/0x120 el0t_64_sync+0x1a8/0x1b0 Rearrange inst destruction. First remove the inst from the core->instances list, second synchronize IRQ/IRQ-thread to make sure that nothing else would see the inst while we take it down. Fixes: 7472c1c69138 ("[media] media: venus: vdec: add video decoder files") Signed-off-by: Sergey Senozhatsky Reviewed-by: Bryan O'Donoghue --- drivers/media/platform/qcom/venus/vdec.c | 12 +++++++++++- drivers/media/platform/qcom/venus/venc.c | 12 +++++++++++- 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platf= orm/qcom/venus/vdec.c index 0013c4704f03..b3192a36f388 100644 --- a/drivers/media/platform/qcom/venus/vdec.c +++ b/drivers/media/platform/qcom/venus/vdec.c @@ -1750,10 +1750,20 @@ static int vdec_close(struct file *file) vdec_pm_get(inst); =20 cancel_work_sync(&inst->delayed_process_work); + /* + * First, remove the inst from the ->instances list, so that + * to_instance() will return NULL. + */ + hfi_session_destroy(inst); + /* + * Second, make sure we don't have IRQ/IRQ-thread currently running + * or pending execution, which would race with the inst destruction. + */ + synchronize_irq(inst->core->irq); + v4l2_m2m_ctx_release(inst->m2m_ctx); v4l2_m2m_release(inst->m2m_dev); ida_destroy(&inst->dpb_ids); - hfi_session_destroy(inst); v4l2_fh_del(&inst->fh); v4l2_fh_exit(&inst->fh); vdec_ctrl_deinit(inst); diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platf= orm/qcom/venus/venc.c index 6a26a6592424..36981ce448f5 100644 --- a/drivers/media/platform/qcom/venus/venc.c +++ b/drivers/media/platform/qcom/venus/venc.c @@ -1517,9 +1517,19 @@ static int venc_close(struct file *file) =20 venc_pm_get(inst); =20 + /* + * First, remove the inst from the ->instances list, so that + * to_instance() will return NULL. + */ + hfi_session_destroy(inst); + /* + * Second, make sure we don't have IRQ/IRQ-thread currently running + * or pending execution, which would race with the inst destruction. + */ + synchronize_irq(inst->core->irq); + v4l2_m2m_ctx_release(inst->m2m_ctx); v4l2_m2m_release(inst->m2m_dev); - hfi_session_destroy(inst); v4l2_fh_del(&inst->fh); v4l2_fh_exit(&inst->fh); venc_ctrl_deinit(inst); --=20 2.47.0.163.g1226f6d8fa-goog