From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (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 F24831FF7D7; Fri, 28 Nov 2025 06:07:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=82.195.75.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764310073; cv=none; b=GoynRKBq4SwXUZ+F+O3ntT/Xy31vAKgIna9s6rK2+BLFkolvMew2NT5ZuxNX2HnqYK+xd4amP51Bp+16knhFjYyOVbX31FbiJ2bO4sALX2OPFxoABPeb4IY/0RSA6Pdm8Bap3JIbfA35pUl82MKcTsQX+e8NXhPBjfEtPhFPkHM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764310073; c=relaxed/simple; bh=V3B7Gmnn6q3ywISbcFRsugLKgra0SI7YccHA8EDq3zk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TwPh8D4DrfjZttkU5CsecTV/7lXDzthactxqCWsq260WLd6xZay/huBQA7Wj7lj9629tEEW0l3ielhCGfE9FBuKqjX6nZrqC1PnKZVIXWwpMHT7wxsEYn0C/90XWTueTuIb+qfzJ27v+4ZDxK47+8zt6oCc5EdjismNUEEjtQpc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org; spf=none smtp.mailfrom=debian.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b=q5c+TOgG; arc=none smtp.client-ip=82.195.75.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b="q5c+TOgG" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=+lK5XDdT+3sYMln2OgEo540rjvYTrKTdQQpFModrmj8=; b=q5c+TOgG+9o1/1h/WqvoF/tC0N aNzEW4mmM5CyD48vKl9S79eLf7AWsjUTXh0AMDKO15LWjiSscsKaT34JktGUq8CAhvOIdCpxIRVnL 8ygSl/n5TQBEQM7Xb0Tb3MzMPRp4x9bj/9jsweahE6XEOJYItKJLCH2xbZ+HX05KDuL9EhKH3ZJoJ sjRId7JqCcmgiPT/atvBJxWPskYNbImXQYTngXENOL9lOouOLFmFKUB+rRkOWwymDJEc1mKaAXznH 8B97c8qeLG/tKY+/vatORb2tK7/NfvAyj55vFuCBC58awTW3obU/6lV13E5wlpx7kZ0YwlEIGO64l bN4vuXjQ==; Received: from authenticated user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.94.2) (envelope-from ) id 1vOrdp-005dUY-2E; Fri, 28 Nov 2025 06:07:37 +0000 Received: by eldamar.lan (Postfix, from userid 1000) id 4272BBE2EE7; Fri, 28 Nov 2025 07:07:36 +0100 (CET) Date: Fri, 28 Nov 2025 07:07:36 +0100 From: Salvatore Bonaccorso To: Jaroslav Kysela , Takashi Iwai Cc: waxhead , linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, 1121535@bugs.debian.org Subject: UBSAN: array-index-out-of-bounds in [...]sound/pci/ctxfi/ctamixer.c:347:48 Message-ID: References: <176428476762.2962.8176922083972711750.reportbug@main.localdomain> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <176428476762.2962.8176922083972711750.reportbug@main.localdomain> X-Debian-User: carnil Hi Jaroslav, hi Takashi A user in Debian reported (in https://bugs.debian.org/1121535) an array-index-out-of-bounds affecting ctxfi/ctamixer.c: On Fri, Nov 28, 2025 at 12:06:07AM +0100, waxhead wrote: > ------------[ cut here ]------------ > Nov 27 23:46:53 main kernel: UBSAN: array-index-out-of-bounds in /build/reproducible-path/linux-6.17.8/sound/pci/ctxfi/ctamixer.c:347:48 > Nov 27 23:46:53 main kernel: index 8 is out of range for type 'unsigned char [8]' > Nov 27 23:46:53 main kernel: CPU: 4 UID: 0 PID: 468 Comm: (udev-worker) Not tainted 6.17.8+deb14-amd64 #1 PREEMPT(lazy) Debian 6.17.8-1 > Nov 27 23:46:53 main kernel: Hardware name: FUJITSU /D3446-S2, BIOS V5.0.0.12 R1.26.0 for D3446-S2x 02/11/2020 > Nov 27 23:46:53 main kernel: Call Trace: > Nov 27 23:46:53 main kernel: > Nov 27 23:46:53 main kernel: dump_stack_lvl+0x5d/0x80 > Nov 27 23:46:53 main kernel: ? __pfx_amixer_set_x+0x10/0x10 [snd_ctxfi] > Nov 27 23:46:53 main kernel: ubsan_epilogue+0x5/0x2b > Nov 27 23:46:53 main kernel: __ubsan_handle_out_of_bounds.cold+0x54/0x59 > Nov 27 23:46:53 main kernel: sum_output_slot+0x44/0x70 [snd_ctxfi] > Nov 27 23:46:53 main kernel: amixer_set_input+0x4b/0x80 [snd_ctxfi] > Nov 27 23:46:53 main kernel: amixer_setup+0x1b/0x50 [snd_ctxfi] > Nov 27 23:46:53 main kernel: ct_mixer_create+0x193/0x570 [snd_ctxfi] > Nov 27 23:46:53 main kernel: ct_atc_create+0x3cb/0x530 [snd_ctxfi] > Nov 27 23:46:53 main kernel: ct_card_probe+0x104/0x2c0 [snd_ctxfi] > Nov 27 23:46:53 main kernel: local_pci_probe+0x3f/0x90 > Nov 27 23:46:53 main kernel: pci_device_probe+0xda/0x2b0 > Nov 27 23:46:53 main kernel: ? sysfs_do_create_link_sd+0x6d/0xd0 > Nov 27 23:46:53 main kernel: really_probe+0xdb/0x340 > Nov 27 23:46:53 main kernel: ? pm_runtime_barrier+0x55/0x90 > Nov 27 23:46:53 main kernel: __driver_probe_device+0x78/0x140 > Nov 27 23:46:53 main kernel: driver_probe_device+0x1f/0xa0 > Nov 27 23:46:53 main kernel: ? __pfx___driver_attach+0x10/0x10 > Nov 27 23:46:53 main kernel: __driver_attach+0xcb/0x1e0 > Nov 27 23:46:53 main kernel: bus_for_each_dev+0x82/0xd0 > Nov 27 23:46:53 main kernel: bus_add_driver+0x10b/0x1f0 > Nov 27 23:46:53 main kernel: ? __pfx_ct_driver_init+0x10/0x10 [snd_ctxfi] > Nov 27 23:46:53 main kernel: driver_register+0x75/0xe0 > Nov 27 23:46:53 main kernel: do_one_initcall+0x58/0x300 > Nov 27 23:46:53 main kernel: do_init_module+0x62/0x250 > Nov 27 23:46:53 main kernel: ? init_module_from_file+0x8a/0xe0 > Nov 27 23:46:53 main kernel: init_module_from_file+0x8a/0xe0 > Nov 27 23:46:53 main kernel: idempotent_init_module+0x114/0x310 > Nov 27 23:46:53 main kernel: __x64_sys_finit_module+0x6d/0xd0 > Nov 27 23:46:53 main kernel: ? syscall_trace_enter+0x8d/0x1d0 > Nov 27 23:46:53 main kernel: do_syscall_64+0x82/0x320 > Nov 27 23:46:53 main kernel: ? restore_fpregs_from_fpstate+0x46/0xa0 > Nov 27 23:46:53 main kernel: ? switch_fpu_return+0x5b/0xe0 > Nov 27 23:46:53 main kernel: ? do_syscall_64+0x200/0x320 > Nov 27 23:46:53 main kernel: ? exc_page_fault+0x74/0x180 > Nov 27 23:46:53 main kernel: entry_SYSCALL_64_after_hwframe+0x76/0x7e > Nov 27 23:46:53 main kernel: RIP: 0033:0x7f77238f3779 > Nov 27 23:46:53 main kernel: Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 4f 86 0d 00 f7 d8 64 89 01 48 > Nov 27 23:46:53 main kernel: RSP: 002b:00007ffc398103f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 > Nov 27 23:46:53 main kernel: RAX: ffffffffffffffda RBX: 000055e0eb622480 RCX: 00007f77238f3779 > Nov 27 23:46:53 main kernel: RDX: 0000000000000004 RSI: 00007f77239f744d RDI: 000000000000001b > Nov 27 23:46:53 main kernel: RBP: 0000000000000004 R08: 0000000000000000 R09: 00007f7723ef6280 > Nov 27 23:46:53 main kernel: R10: 0000000000000000 R11: 0000000000000246 R12: 00007f77239f744d > Nov 27 23:46:53 main kernel: R13: 0000000000020000 R14: 000055e0eb61e630 R15: 0000000000000000 > Nov 27 23:46:53 main kernel: > Nov 27 23:46:53 main kernel: ---[ end trace ]--- This was specifically with 6.17.8 but up to the current stable 6.17.9 there should be no related changes afaics. Regards, Salvatore