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 94AF048124E; Sat, 12 Sep 2026 19:00:13 +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=1789239614; cv=none; b=nkbn1Ilajzo3gmZppzsGWLXlCEzUZiU9CEegGTP4Pejsr4kMf9rkrHhgbFrAw/7N9DyLnHFdzjo+bbr45ulqvcsU/HppIcBgcFokKE3eUoQ8Om8Xw47+J+lJh48F0jQIHyRAsEt6nV/aUf3SRqrdAYn5v0ijKsp4+a1akGZMhlM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789239614; c=relaxed/simple; bh=rLFo/Jmstve30mqvGTfZtAPwCHzPw1BIipf43b+LD7E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZiFxUhdR+1V0TuWXtVX+L0+MTsSWskE264rof4WWOZHjbc6xstzMFXk2SD0uYJdfbgoNISh9488XSPZSO/QxCAp9wtM0grkmbzR0CCqx+5iRB4pyWoXI7GhTlsl4O3H/Wt1SLh25aIzUWHYV01wcPGMshBPux782pGdyqKviEGM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=E4sFvYhN; 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="E4sFvYhN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4DF391F000FF; Sat, 12 Sep 2026 19:00:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789239613; bh=xAT/bP+QQEZnutyhN4f4BZkE1ceWFSXJ1+AYrBV0rnw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=E4sFvYhNqY/CgjskVnEv2fCH93aRAoyIUwtotPphlZG/w9QcD0TJJuo7cikV63kXZ CBQAWIDOeX/yuZgLe0J8f65rzFInkLXiqkAPXdSIUB2ODUZh/ynCjzd52BEBU2Pt3t tdt7DMtnuTRwSW/wcboOD7jsHoLSLel2e7FuH/s4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mukesh Ojha , Bjorn Andersson , Sasha Levin Subject: [PATCH 5.15 700/935] remoteproc: fix OOB read via signed offset in rsc_table_for_each_entry() Date: Sat, 12 Sep 2026 09:02:10 +0200 Message-ID: <20260912065542.893771212@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@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: Mukesh Ojha [ Upstream commit bb840ea69347aff7bde5a208e7b5b180669a7656 ] table->offset[i] is a u32 from firmware, but was stored into a signed int. A crafted offset like 0xFFFFFFF0 becomes -16, placing hdr 16 bytes before the table buffer. The subsequent avail check was bypassed because the negative int was promoted to a large size_t in the expression "table_sz - offset - sizeof(*hdr)", yielding a large positive avail and letting the out-of-bounds hdr->type read proceed undetected. Store the offset as u32 and validate it with unsigned comparisons before any pointer arithmetic. Signed-off-by: Mukesh Ojha Fixes: fd2c15ec1dd3 ("remoteproc: resource table overhaul") Link: https://lore.kernel.org/r/20260803114331.3277263-6-mukesh.ojha@oss.qualcomm.com Signed-off-by: Bjorn Andersson Signed-off-by: Sasha Levin --- include/linux/rsc_table.h | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/include/linux/rsc_table.h b/include/linux/rsc_table.h index c6d6d553d8f11..4cef11a2e3a2c 100644 --- a/include/linux/rsc_table.h +++ b/include/linux/rsc_table.h @@ -337,17 +337,22 @@ static inline int rsc_table_for_each_entry(struct resource_table *table, int i, ret; for (i = 0; i < table->num; i++) { - int offset = table->offset[i]; - struct fw_rsc_hdr *hdr = (void *)table + offset; - int avail = table_sz - offset - sizeof(*hdr); - int rsc_offset = offset + sizeof(*hdr); - void *rsc = (void *)hdr + sizeof(*hdr); + u32 offset = table->offset[i]; + struct fw_rsc_hdr *hdr; + int avail, rsc_offset; + void *rsc; - if (avail < 0) { + if (offset < sizeof(*table) || offset >= table_sz || + table_sz - offset < sizeof(*hdr)) { dev_err(dev, "rsc table is truncated\n"); return -EINVAL; } + hdr = (void *)table + offset; + avail = table_sz - offset - sizeof(*hdr); + rsc_offset = offset + sizeof(*hdr); + rsc = (void *)hdr + sizeof(*hdr); + ret = cb(hdr->type, rsc, rsc_offset, avail, data); if (ret) return ret; -- 2.53.0