From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8DD5312FF61; Sun, 26 May 2024 09:43:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716716611; cv=none; b=J0ciYJi9WUjT6odVnfceF+fVHSmt3w0uHN+51FQZtTPysiFKf1Bh1O46qrFrZZr7bSEYsb4m4ENa+dEmI/NoGCCVc27hWnZthH6CRtXmKGZfgx+RQEmPwAWnsh5VZ8bF1pRtxtm1w3C/fVyednGMQiP32cJ+jsQ/ztlAwPYwiGg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716716611; c=relaxed/simple; bh=c5yfH6H6bPCU9g29WjamsYCZW1ZxsHiZnvNXgWIuJgI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Onlr1nHDWAyyxVBZyVCNlNZMTzzapto9vO0tZrBSwyefh2WEpXHAv+uD3qEMTIJnEkr3/hP/3Xle9QIp6c8/+NQ6AY7xktBjMaX8+XowNcHsX9553E9Vdv60A1mde4QtYJpeTBs+TvFnJsn1J9+CuNNEVDqLI3hFKfL0ifCfX2Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=M9HBJTDG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="M9HBJTDG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 899A5C2BD10; Sun, 26 May 2024 09:43:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716716611; bh=c5yfH6H6bPCU9g29WjamsYCZW1ZxsHiZnvNXgWIuJgI=; h=From:To:Cc:Subject:Date:From; b=M9HBJTDGp91xDLRiPG5+OffRKQ257XUkbst1mMKOmZWCH7jFgpSzyeoZ1xKqJX3iH Y4vNtw7viRTgSyjtvAGQeL9KwlWBFsmaEXsuws7rJnoET/tveHJwOGIgZXjAzHg1Sf Du+PmTvSCyWhsYBDY/ISxUssoknPpa4fmu3BrGDwlFeE+x/dnxmonnZKuTjoYQUuB5 YTG2wpu8iCNzypkR15Hz3GLMBwbmwvc2Y5N7SkF9gjCDLDa3JydxE5mhj0PFUi/dpK 1E5F9qFxbHO4RW+xRa6r9dfQpBqsNwdQ7eHbjvlGQRl0GpkxJSrRcsv9NGPp/omqDF mA09V58iZF41w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Herbert Xu , syzbot+0cb5bb0f4bf9e79db3b3@syzkaller.appspotmail.com, Daniel Jordan , Sasha Levin , steffen.klassert@secunet.com, linux-crypto@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 1/7] padata: Disable BH when taking works lock on MT path Date: Sun, 26 May 2024 05:43:21 -0400 Message-ID: <20240526094329.3413652-1-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.159 Content-Transfer-Encoding: 8bit From: Herbert Xu [ Upstream commit 58329c4312031603bb1786b44265c26d5065fe72 ] As the old padata code can execute in softirq context, disable softirqs for the new padata_do_mutithreaded code too as otherwise lockdep will get antsy. Reported-by: syzbot+0cb5bb0f4bf9e79db3b3@syzkaller.appspotmail.com Signed-off-by: Herbert Xu Acked-by: Daniel Jordan Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- kernel/padata.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/kernel/padata.c b/kernel/padata.c index 47f146f061fb1..809978bb249c2 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -98,7 +98,7 @@ static int __init padata_work_alloc_mt(int nworks, void *data, { int i; - spin_lock(&padata_works_lock); + spin_lock_bh(&padata_works_lock); /* Start at 1 because the current task participates in the job. */ for (i = 1; i < nworks; ++i) { struct padata_work *pw = padata_work_alloc(); @@ -108,7 +108,7 @@ static int __init padata_work_alloc_mt(int nworks, void *data, padata_work_init(pw, padata_mt_helper, data, 0); list_add(&pw->pw_list, head); } - spin_unlock(&padata_works_lock); + spin_unlock_bh(&padata_works_lock); return i; } @@ -126,12 +126,12 @@ static void __init padata_works_free(struct list_head *works) if (list_empty(works)) return; - spin_lock(&padata_works_lock); + spin_lock_bh(&padata_works_lock); list_for_each_entry_safe(cur, next, works, pw_list) { list_del(&cur->pw_list); padata_work_free(cur); } - spin_unlock(&padata_works_lock); + spin_unlock_bh(&padata_works_lock); } static void padata_parallel_worker(struct work_struct *parallel_work) -- 2.43.0