From nobody Mon Nov 25 21:50:28 2024 Received: from mail-il1-f171.google.com (mail-il1-f171.google.com [209.85.166.171]) (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 17A521B3940 for ; Fri, 25 Oct 2024 03:46:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729828008; cv=none; b=QoFkSrnX5lYisIjAO9JY4384vustTF4N+QgU1rt+bXxOXjjEyW4JUJrkHBP9wpa64oD/bB1Whua689Akfr+4PLc0oJcRyHyScY9/a/0IdzaO4w9km4jcqh5wCzlt892zj6VzLr2IS8Ru8xbOJ/e/zo/hEi7ndAMXPcUql6jmtTA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729828008; c=relaxed/simple; bh=sK3GReGrrBIZCIcruu3To61mhXqDKeErWsYmv/yiG9M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HI0h351j6nS83XoQ891IeqESihaFgWQiWBbjlUj2Y2GcFqCkKCuoWpmelSn4209FbCFRZCYlnWqyQpT7JG9wY8CbKxwbyM8ru3Psn6vve6mCRVhBNVg25tC72CT9FFNOYpQm9JLagdI1oC/9QJwNyxIuDEUnUdFULzYqGIRsE58= 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=YRQ2HTMu; arc=none smtp.client-ip=209.85.166.171 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="YRQ2HTMu" Received: by mail-il1-f171.google.com with SMTP id e9e14a558f8ab-3a4e30bffe3so2846715ab.3 for ; Thu, 24 Oct 2024 20:46:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1729828005; x=1730432805; 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=YRQ2HTMuIkl274RjbOPHdF4O2yyy65Yws84DEz08blJvLOj31oCJL01TKZFXsk4DvK vlh92mRDQghUUp2SF8YMmIsI9cKf9S8sqPhZXxGTznvuGZc/vxOZi4tB55PoRd61UELq YRrOM8vpIFvEKGO6wNQtfQvb+Z1c9r6DR/ZaA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729828005; x=1730432805; 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=EiAGdOEk1xpLVPXjWRYrqBf3RwIQKtCO3THTvNAsDQcIyrAjDlLeRKArYpL9e3fqY9 bxrAU2Pvrn3CVcRDWMa1z2p8IBML8+iIQQ5r+YuDfRRSLd2MNqnbvRVzhbZqA8bSa9Px v0ir4yrbEoRw50ntMADTvDvbZweFQxYR3Cz+lNTBdI0gaeekAiVDHT4GgHISmCtwzqtw oXg5KDt0ZQ/t07gBzzaXnUplYyLYe/w8N8liKyph13KaRm8sS4+8Pqf1QWl4/7WYBBlQ oEbG3SLCCFfbC5cKNUp4ttNrWc83gNySImu0EP3OorAE7O6xdAbjWagbDxAdGCYP0erL zQ2A== X-Forwarded-Encrypted: i=1; AJvYcCVIGgs6U85nLvlP1t+l9DI/99LfHmX0MuPiP1lgcJUOD1UtXp+sR/tpiRdxnoFhhnAybCUadCvzSC7G0Z4=@vger.kernel.org X-Gm-Message-State: AOJu0Yy67/sWAVE5wDk/uWVGBrNjBIomEoKzJkvJ6vFO2lBF4J5b4CyE /xm9kme+zoPz4qy5JKxj2ZFA17JUiM67A5iHRivvGwBe6plPvd3Nr5Hmkqp95A== X-Google-Smtp-Source: AGHT+IHdcS/vIpN3XVv+OeWemH4WjRZPATqKfxhRmZV7ToHVkIcJIB86Kny1wrH9TtF0foLLESWNUQ== X-Received: by 2002:a05:6e02:17cd:b0:3a3:be8a:8717 with SMTP id e9e14a558f8ab-3a4de7b8c56mr47800925ab.15.1729828005198; Thu, 24 Oct 2024 20:46:45 -0700 (PDT) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:c7f5:2aa6:333b:bb6d]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7edc8696bbbsm185197a12.49.2024.10.24.20.46.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Oct 2024 20:46:44 -0700 (PDT) From: Sergey Senozhatsky To: Stanimir Varbanov , Vikash Garodia , Bryan O'Donoghue Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: [PATCHv3 2/3] media: venus: sync with threaded IRQ during inst destruction Date: Fri, 25 Oct 2024 12:46:13 +0900 Message-ID: <20241025034629.660047-3-senozhatsky@chromium.org> X-Mailer: git-send-email 2.47.0.163.g1226f6d8fa-goog In-Reply-To: <20241025034629.660047-1-senozhatsky@chromium.org> References: <20241025034629.660047-1-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