From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=74.125.82.177 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792750747; b=pQtSg7+a5zVr85vhXMG6hZK/x8WfSMRT2Ers/DbyBI9y6sMwxBZjD9tWWezqEbIe8JCT t9E/bOP9U1UlkAjzaqtte8TAGy2B10nB/PN8OQ3aPX2XX0svg88Scc+6aUfKrE+Fc92YD 3ItlExPWDgf4w/J3K7pbx4+YbDneZvdzhpHBw4yP4KqFRgfpvAwzSnLcp8C1lcd/m6gpl Z4qgj0VjOLislnyDxT1S7cmWDFteUdB5CiU1a1xB6lRDngDUimGpjLG2sVLEWyq9MOIwH wnZZmBmcqzOJaTAWqqvsdnLRTliVEzhM1XZfDyeMYI9tTWgTcCOuzi7lUFX3pGWnbAQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792750747; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Gm-Gg:X-Received:Received: From:To:Cc:Subject:Date:Message-ID:X-Mailer:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding; bh=EtqIIM3bW6NOeXuYxzInv9x9RXwFgInG15ngZwHQesg=; b=GoFLdWinn0ZuVzzIRoVXXIdXa1Ssmwa9Prw/Gters+xigdJGxaGntBgKiOVgpx+ZJ0AX E4MwxwqE1u+GwzgqtTv5Rey49eQuL9wwOwLITaIwDbm9tGpoEV42xqF4ebOg75XMv+pze 8nNEJl2DorJGD8YM64aFqGQmp+pPLBKazvvFY2Dj0mYu5009/w2Wl/4gVL6/qfJF1IUnf oUHMKhPhi1hKysnGU7MfPgxmBEeA6eicRH41NOxHH/uRURu7inJD9cZB6SIx728IsQQPz /TccMbYRstjDGZxCaE2RxgWnSa3PMHOToKEXdzraDy5G1eRw+JrKoJu5c8kAr0072Jw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=WgJoA6S4; arc=none smtp.remote-ip=74.125.82.177 Received: from mail-dy1-f177.google.com (mail-dy1-f177.google.com [74.125.82.177]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9B25606A323 for ; Fri, 23 Oct 2026 10:19:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org C9B25606A323 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=WgJoA6S4 Received: by mail-dy1-f177.google.com with SMTP id 5a478bee46e88-354ba08cfd1so1274838eec.1 for ; Fri, 23 Oct 2026 03:19:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1792750746; x=1793355546; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=EtqIIM3bW6NOeXuYxzInv9x9RXwFgInG15ngZwHQesg=; b=WgJoA6S44uO/kodNCvO5TWbOc5qRb941lr1BdiQSPZD1ZmbbclzwNvze+lgsbWqm+j vL0hh4xcgsfWF9OZTnxs+7mFhoy49Q3FrUYbumgMFJNmeLOJvguO0mjbUThrdxcWFRi+ LgqqA8/+mad43oN5NaWT80APlrZc7Isi3ZCfIQZO/wVEOAGDHp/aoExxTdsBGwo340QM 8b+vAayY3N0rgkUXFHgAFb93/fEkdsVt6L2dgkBk+9DW2PXNs0nwivLfOEPVbv/LI/yd eIsZziTPdkHUj1twXuTaIMAL3S6XIRRilLxju6S5J9OKXjRXTufHW9Yene8JaU6X3Hg0 +rog== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792750746; x=1793355546; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=EtqIIM3bW6NOeXuYxzInv9x9RXwFgInG15ngZwHQesg=; b=CNa/rtZRW0aYc+dpGyBEpOR0Un40XxOYQMX3PO6UREHUJ9hKJRhfgqU6ZDLNTVGRH6 6s0a9SauT7FHu/27gIAFapaYNbzlNGmIfmFUFzMsqrmLbi5zx63T4SgGfkNa+r380A7y q4hRBF8hRfUAi6gCCcmP86UkulDTMbVZHjEyBRjS5SaM76MHsU7eCVRRYNAz5w+24iGF jIbn4AGv0ftjc5gsKcATNw+kTiV29B4P6SiTzsTccd0FDmlw6lxbn/PwqH+gogjY+O9i CAqCWLpQqv7apLnX2ASZ7Qvziv/3tSTf+NAeq1R2GWrqfVG/LL3pFlIC0fGg+IbSxSlO tN6g== X-Forwarded-Encrypted: i=1; AKwUvBxe/FohKpt7WOdM1GlB34itBvVyqDEsqUCrpZD3m+PkJcn9LXNWg4QIGnGzXqYgIZW8leiAeSOenn+B2mI=@vger.kernel.org X-Gm-Message-State: AFq9FYJTdBEFTUTVC5EOLf+f10X4xv6zthM7KFGhGLCRfTDKRLxxEB7w 7tJT8ze93bIiSXBsAKg79Gg0OltLwND6oQTS/hnkJTufCZE/rfN+dPb0 X-Gm-Gg: AYBFou2Z1dGb511CKFIKM0aalIO7nH2h8sRjGziWv+2x5dYEMuCl4i8NR8r5KlnSheL oBkiTf3qdAB9ErUzJcn1pGix4Mr9xl/6tO7x5OlvH0EpD9Qsjf4iXjHBPAbFXZly6nHo8ZUfHGu C8PlMWk7L0tweZy3m0rDiC1AOnu2rYr77L+yn5ThfmdzflsJPdmPGSf66BTZAEPG20aBm+YifPF 8QkgJBaR8KOEZkmm7dY3O06ifAlQBIHdnbntyAeHzLeMu3UyvosjkG+/QR3dvKJ4USGtYJ5T6Ri 6DP8dn1NohHTG3ME5I/WJitebM+SqHYNEiWPB6pcqVZ/wfKVBS50CvY+AEojGQlGNBJRcO6vJCk Z4ylU703WZ+zBpGz9ljHF1obV3q1CNdnxOS2BIZCRs4bNHOMkPLkWOXefHGIbnaDeHAKesmupA/ ZupHhEZ4fJ4FZcFjBq1jYppzW8SmV2WLUVjrXZHUMcfFbwZH80ttnyXwRcN/kByir2DCeAjP79f nroJrr/0rH90h3xt7oAGTq0x3RR9fOyEbVaGfuWRqdX2TK3mU56jzf+sSTQzNApHedxmqHuiwk= X-Received: by 2002:a05:693c:6383:20b0:369:5583:bf48 with SMTP id 5a478bee46e88-369d975b14fmr2185109eec.24.1792750745608; Fri, 23 Oct 2026 03:19:05 -0700 (PDT) Received: from kernel.tail6741c6.ts.net ([185.220.238.37]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-369d9deef9bsm5852176eec.22.2026.10.23.03.18.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Oct 2026 03:19:02 -0700 (PDT) From: Kunwu Chan To: jiangshanlai@gmail.com, paulmck@kernel.org, josh@joshtriplett.org, work@onurozkan.dev, frederic@kernel.org, neeraj.upadhyay@kernel.org, joelagnelf@nvidia.com, boqun@kernel.org, urezki@gmail.com Cc: rostedt@goodmis.org, mathieu.desnoyers@efficios.com, qiang.zhang@linux.dev, rcu@vger.kernel.org, linux-kernel@vger.kernel.org, Kunwu Chan , Kunwu Chan Subject: [PATCH 1/9] srcu: Record callback registration stack for KASAN Date: Fri, 23 Oct 2026 18:18:33 +0800 Message-ID: <20261023101841.2910719-2-kunwu.chan@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261023101841.2910719-1-kunwu.chan@gmail.com> References: <20261023101841.2910719-1-kunwu.chan@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Record the callback registration stack in __call_srcu() for KASAN diagnostics involving SRCU callbacks. Suggested-by: Zqiang Signed-off-by: Kunwu Chan --- kernel/rcu/srcutree.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index 2b0e2b2d2c18..46fe2f0cef85 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -1530,6 +1531,10 @@ static void __call_srcu(struct srcu_struct *ssp, struct rcu_head *rhp, { if (WARN_ON_ONCE(ssp->srcu_reader_flavor == SRCU_READ_FLAVOR_ATOMIC)) return; // Leak the callback rather than corrupt SRCU state. + + /* Record the caller: the irq_work's stack says nothing about it. */ + kasan_record_aux_stack(rhp); + if (should_rcu_defer()) { struct srcu_defer *sndp = this_cpu_ptr(&srcu_defer); struct srcu_data *sdp; -- 2.43.0