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 BB94831A807; Thu, 30 Jul 2026 00:43:26 +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=1785372207; cv=none; b=HpTO7lT5AQFE1AoWfvb0tZWMQ50b27d18gYRZS1DE68U/EriV+pEmXI85HjMEgGv0WhvWt67DOQupPsPDqjcvrbtcXcCdq/jg0VPTVd04knoY0I8aRdjIpkaS6Y8/q9sTIjU8PgQdT4QyrBIqpZNSAI6UBBAStJJ5c372xaMQLI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785372207; c=relaxed/simple; bh=B+XNrHkc/kM1y/IBeJU+KnZsHiTLSR2VYRwoHlNUVkU=; h=Date:To:From:Subject:Message-Id; b=u3NVxqOPt33ggsNc56AjUdJRC3VcyurcyeMc3YnFZUX17Z8F0Jo6w5KenzDml21PZmbcpZyUWiuqI2QSogrLuPabqYP28+UkYlQ1hkx91BsWnxlgHo5dqe3HQnXe/VnQBSJ8b/vQ2cR/h7j6b/ANXezllFRJvMlGeuappCxrDlU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=c60/tV99; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="c60/tV99" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7FEFF1F000E9; Thu, 30 Jul 2026 00:43:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1785372206; bh=Nl5Y4bJAvi3jkfxwzlmhI5NoU9BgpWNB0MPjCCUbcD0=; h=Date:To:From:Subject; b=c60/tV99t1eyt88LUHqLW3b8yccgz1v3OYQ0bZYjNzXFpRHg+d/OrvYpnKEFEuRff vmCiP143/vLHaZnF4wGjTtMi4mq2R4N3So0iWnAbBjXUaUOPh4QpyEg46gZgyyBLQ0 Ul4GDBJL6TfjymbjvKHmbCLNxEtDrh0mfe6GzsTc= Date: Wed, 29 Jul 2026 17:43:26 -0700 To: mm-commits@vger.kernel.org,stable@vger.kernel.org,minchan@kernel.org,haoqinhuang7@gmail.com,senozhatsky@chromium.org,akpm@linux-foundation.org From: Andrew Morton Subject: + zram-validate-deflate-params.patch added to mm-new branch Message-Id: <20260730004326.7FEFF1F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: zram: validate deflate params has been added to the -mm mm-new branch. Its filename is zram-validate-deflate-params.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-validate-deflate-params.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Sergey Senozhatsky Subject: zram: validate deflate params Date: Wed, 29 Jul 2026 13:57:36 +0900 We must validate user-supplied deflate winbits before we pass it to zlib_deflate_workspacesize(), which triggers BUG_ON() if winbits value is outside of valid ranges. Link: https://lore.kernel.org/20260729045745.775973-3-senozhatsky@chromium.org Fixes: dc75a0d93bd5 ("zram: support deflate-specific params") Link: https://sashiko.dev/#/patchset/20260728092935.31139-1-haoqinhuang7@gmail.com Signed-off-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Haoqin Huang Cc: Signed-off-by: Andrew Morton --- drivers/block/zram/backend_deflate.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) --- a/drivers/block/zram/backend_deflate.c~zram-validate-deflate-params +++ a/drivers/block/zram/backend_deflate.c @@ -24,8 +24,16 @@ static int deflate_setup_params(struct z { if (params->level == ZCOMP_PARAM_NOT_SET) params->level = Z_DEFAULT_COMPRESSION; - if (params->deflate.winbits == ZCOMP_PARAM_NOT_SET) + if (params->deflate.winbits == ZCOMP_PARAM_NOT_SET) { params->deflate.winbits = DEFLATE_DEF_WINBITS; + } else { + s32 wb = params->deflate.winbits; + + if ((wb < -15 || wb > -9) && (wb < 9 || wb > 15)) { + pr_err("invalid deflate winbits: %d\n", wb); + return -EINVAL; + } + } return 0; } _ Patches currently in -mm which might be from senozhatsky@chromium.org are documentation-zram-remove-sections-numbering.patch zram-set-default-primary-compressor-in-zram_destroy_comps.patch zram-validate-deflate-params.patch