From patchwork Wed Oct 16 12:34:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jose Ignacio Tornos Martinez X-Patchwork-Id: 836662 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 9CF8C207A2C for ; Wed, 16 Oct 2024 12:35:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729082111; cv=none; b=t5dCy+Y5XxHXNxm0wkEjhnUxbXXz2rT/jjuJlg8J2Q2xJnXJyit9BFyMx4pfL9xzsTnTXi7P1jG+Hyq1qXsUjENk/pM29lRvGJRR2kEQ3nynESThhLvyJHHr12FGgyfIVZabA7I3/ChswBFNuWVKhfpyZIIKl2ZR1HscXvtWVng= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729082111; c=relaxed/simple; bh=NYSW9sJe0ddUieew/4dGtScCTlSW7zhiib8dvSbIBZI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mHKnNXJhvN1MNTqp/kl8MUxJUn8i7E9cNVmX5rBqLULOzB1JQaZriVDE1FgLT0O3fjBBaxQUA9iwoXPmlFyy/HoG8q4TYPvkYHYkcnqRh1POZ5D2Q40X/zoB2Zjq21EOQWlhQJPf9aHC7J5pPKpX4P6jSX5UH3XACutYWzVf8yY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=i7OdNjL8; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="i7OdNjL8" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1729082108; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=fxQ2m9WNRH1Jtz7v1wsGZ2v7fCiu2LTJ3s6phMhobAM=; b=i7OdNjL8JALlOMKkLuM7XQccHrJLvyw6qfYnYGyjB9j3I0xaxrwDrssiCAYdrfvuM/ryOr uFu5pqxEZbksga35ZbXyOTPEcuoWooAJijWrktirMIcX92H4xK+WR2Nlf2vhENBqvDVT8/ zOwTRXCe6PiLL3rwTnaDsRtG0mPyWpk= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-416-J-AnC9xANo2B9f_KCGF05A-1; Wed, 16 Oct 2024 08:35:05 -0400 X-MC-Unique: J-AnC9xANo2B9f_KCGF05A-1 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 13E5C19560B0; Wed, 16 Oct 2024 12:35:04 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.39.192.76]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 5B4AC19560A2; Wed, 16 Oct 2024 12:35:01 +0000 (UTC) From: Jose Ignacio Tornos Martinez To: kvalo@kernel.org, jjohnson@kernel.org, linux-wireless@vger.kernel.org, ath12k@lists.infradead.org, linux-kernel@vger.kernel.org Cc: jtornosm@redhat.com, stable@vger.kernel.org Subject: [PATCH v2 1/2] wifi: ath12k: fix crash when unbinding Date: Wed, 16 Oct 2024 14:34:47 +0200 Message-ID: <20241016123452.206671-1-jtornosm@redhat.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 If there is an error during some initialization realated to firmware, the funcion ath12k_dp_cc_cleanup is already call to release resources. However this is released again when the device is unbinded (ath12k_pci), and we get: [ 382.050650] BUG: kernel NULL pointer dereference, address: 0000000000000020 [ 382.050656] #PF: supervisor read access in kernel mode [ 382.050657] #PF: error_code(0x0000) - not-present page [ 382.050659] PGD 0 P4D 0 [ 382.050661] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI [ 382.050664] CPU: 0 UID: 0 PID: 6541 Comm: bash Kdump: loaded Not tainted 6.12.0-rc1+ #14 [ 382.050666] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014 [ 382.050667] RIP: 0010:ath12k_dp_cc_cleanup.part.0+0xb6/0x500 [ath12k] [ 382.050688] Code: 8b 76 28 48 8b 7b 10 45 31 c0 b9 02 00 00 00 e8 30 3d 35 c2 be 02 00 00 00 4c 89 f7 e8 e3 00 fb c2 49 83 c7 28 49 39 ef 74 31 <41> f6 47 20 01 75 ab 4c 89 ff e8 2b de a2 c2 84 c0 74 0e 49 8b 17 [ 382.050689] RSP: 0018:ffffa3e3c0e83990 EFLAGS: 00010297 [ 382.050691] RAX: 0000000000000000 RBX: ffff90de08750000 RCX: 0000000000000000 [ 382.050692] RDX: 0000000000000001 RSI: ffff90de08751178 RDI: ffff90de08751970 [ 382.050693] RBP: 0000000000005000 R08: 0000000000000200 R09: 000000000040003f [ 382.050694] R10: 000000000040003f R11: 0000000000000000 R12: dead000000000122 [ 382.050695] R13: dead000000000100 R14: ffffffffc0b6f948 R15: 0000000000000000 [ 382.050696] FS: 00007f216b1ab740(0000) GS:ffff90de5fc00000(0000) knlGS:0000000000000000 [ 382.050698] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 382.050699] CR2: 0000000000000020 CR3: 000000001a26c000 CR4: 0000000000752ef0 [ 382.050702] PKRU: 55555554 [ 382.050703] Call Trace: [ 382.050705] [ 382.050707] ? __die_body.cold+0x19/0x27 [ 382.050719] ? page_fault_oops+0x15a/0x2f0 [ 382.050723] ? exc_page_fault+0x7e/0x180 [ 382.050724] ? asm_exc_page_fault+0x26/0x30 [ 382.050729] ? ath12k_dp_cc_cleanup.part.0+0xb6/0x500 [ath12k] [ 382.050740] ? delay_halt_tpause+0x1a/0x20 [ 382.050742] ath12k_dp_free+0x67/0x110 [ath12k] [ 382.050753] ath12k_core_deinit+0x8d/0xb0 [ath12k] [ 382.050762] ath12k_pci_remove+0x50/0xf0 [ath12k] [ 382.050771] pci_device_remove+0x3f/0xb0 [ 382.050773] device_release_driver_internal+0x19c/0x200 [ 382.050777] unbind_store+0xa1/0xb0 ... The issue is always reproducible from a VM because the MSI addressing initialization is failing. In order to fix the issue, just set to NULL the relaeased structure in ath12k_dp_cc_cleanup at the end. cc: stable@vger.kernel.org Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices") Signed-off-by: Jose Ignacio Tornos Martinez --- v2: - Fix the commit size in Fixes v1: https://lore.kernel.org/linux-wireless/20241010175102.207324-2-jtornosm@redhat.com/ drivers/net/wireless/ath/ath12k/dp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/ath/ath12k/dp.c b/drivers/net/wireless/ath/ath12k/dp.c index 61aa78d8bd8c..789d430e4455 100644 --- a/drivers/net/wireless/ath/ath12k/dp.c +++ b/drivers/net/wireless/ath/ath12k/dp.c @@ -1241,6 +1241,7 @@ static void ath12k_dp_cc_cleanup(struct ath12k_base *ab) } kfree(dp->spt_info); + dp->spt_info = NULL; } static void ath12k_dp_reoq_lut_cleanup(struct ath12k_base *ab)