From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 8AA7A25B095; Sat, 30 May 2026 17:52:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163552; cv=none; b=JzkHxJeDmZK67FKes6mBb8rfKCZ5NPDfX3jn/uX0gZ3aKzyZlo5WeAEnsOFJ60ieuaH+9I+zf5nIU+728u3zAvk3H4OA42QPbwMpI31eFIvEg56emlvU9TLwc3FPvtFYMqdCBsr7O4PFjMz867aIJy1M/MFM4tkXdbyLci2zHKU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163552; c=relaxed/simple; bh=E6vT35PAUeKvv/H9yyFTFOO5JYvPII8EnogEWoPDWpM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uD/H0BfP8pRVD9Qrix17MujqsU4vJtgFYQKneaAMzQfmnqehk8Wf1JuVY83ItPz7a6QTJ2ZeloSxxFTirvSEoG7CW2oy+YzNTgaPGQhjpQTUGIsz3IUrSkuHyZKpcYWgRp4X/9XA7vQSzubiZ+3lwRPK2Qd7kkexdiDDLfi3jlc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=h9aBAV48; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="h9aBAV48" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CD9BC1F00893; Sat, 30 May 2026 17:52:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780163551; bh=rTOeqTj5NfS4ZSTxHVgl5aG5OYGhFlGyQXPVQR0kWeM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=h9aBAV48uFu8ELjIBg2mqGnHgrUC/mfsIbKJwbv8fTJOHb46vTz0vVxURvtG5Z6gV anASVQDUE7PDtpo5mDo328HgTqe/XE5wTTFWrkzoVTzORVh3ntl6c1se2D4hsmmvrA rBNG3ifSo8MtFj90iJltB2Dnof3UMbz7LbpI1aLo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Jiri Slaby (SUSE)" , Vincent Danjean , Jeff Johnson Subject: [PATCH 5.15 291/776] wifi: ath5k: do not access array OOB Date: Sat, 30 May 2026 18:00:05 +0200 Message-ID: <20260530160248.080152913@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jiri Slaby (SUSE) commit d748603f12baff112caa3ab7d39f50100f010dbd upstream. Vincent reports: > The ath5k driver seems to do an array-index-out-of-bounds access as > shown by the UBSAN kernel message: > UBSAN: array-index-out-of-bounds in drivers/net/wireless/ath/ath5k/base.c:1741:20 > index 4 is out of range for type 'ieee80211_tx_rate [4]' > ... > Call Trace: > > dump_stack_lvl+0x5d/0x80 > ubsan_epilogue+0x5/0x2b > __ubsan_handle_out_of_bounds.cold+0x46/0x4b > ath5k_tasklet_tx+0x4e0/0x560 [ath5k] > tasklet_action_common+0xb5/0x1c0 It is real. 'ts->ts_final_idx' can be 3 on 5212, so: info->status.rates[ts->ts_final_idx + 1].idx = -1; with the array defined as: struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; while the size is: #define IEEE80211_TX_MAX_RATES 4 is indeed bogus. Set this 'idx = -1' sentinel only if the array index is less than the array size. As mac80211 will not look at rates beyond the size (IEEE80211_TX_MAX_RATES). Note: The effect of the OOB write is negligible. It just overwrites the next member of info->status, i.e. ack_signal. Signed-off-by: Jiri Slaby (SUSE) Reported-by: Vincent Danjean Link: https://lore.kernel.org/all/aQYUkIaT87ccDCin@eldamar.lan Closes: https://bugs.debian.org/1119093 Fixes: 6d7b97b23e11 ("ath5k: fix tx status reporting issues") Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20251209100459.2253198-1-jirislaby@kernel.org Signed-off-by: Jeff Johnson Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/ath/ath5k/base.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/net/wireless/ath/ath5k/base.c +++ b/drivers/net/wireless/ath/ath5k/base.c @@ -1692,7 +1692,8 @@ ath5k_tx_frame_completed(struct ath5k_hw } info->status.rates[ts->ts_final_idx].count = ts->ts_final_retry; - info->status.rates[ts->ts_final_idx + 1].idx = -1; + if (ts->ts_final_idx + 1 < IEEE80211_TX_MAX_RATES) + info->status.rates[ts->ts_final_idx + 1].idx = -1; if (unlikely(ts->ts_status)) { ah->stats.ack_fail++;