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Received: from willy by casper.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tp6Ix-0000000BijE-2SH3; Mon, 03 Mar 2025 13:57:59 +0000 Date: Mon, 3 Mar 2025 13:57:59 +0000 From: Matthew Wilcox To: Hannes Reinecke Cc: Sagi Grimberg , "linux-nvme@lists.infradead.org" , "linux-block@vger.kernel.org" , linux-mm@kvack.org Subject: Re: Kernel oops with 6.14 when enabling TLS Message-ID: References: <08c29e4b-2f71-4b6d-8046-27e407214d8c@suse.com> <509dd4d3-85e9-40b2-a967-8c937909a1bf@suse.com> <913d3824-04c7-4cb1-a87b-01f9241a37aa@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <913d3824-04c7-4cb1-a87b-01f9241a37aa@suse.com> X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: DECB7180010 X-Stat-Signature: aiczmqrigyz4gbzgupukuanas7x4437b X-HE-Tag: 1741010283-611057 X-HE-Meta: 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 fgCPAEd7 EWHS2v3bfT1wSFcCGFjrDGiBpvZF4RbrR+M4j/cxXJyqACCO9YYeJC8WZoA9isSaYro3TQKqHDe9Wv95XKxTtaLW6bzfG5D/6ILX0btNB5uvm4TAWy0iodnUT3VzFNWsS4P5zxQB0SgCu+zk597o/NkV4khogU1iJcny07LsK8FybKHZg4D5q2Mz4TGZECzxxNEtIZT/+Q0bVhg7zCv/XUuZwoYH8IklDeC9YlC0pt8IZPIVAJ49N1KOG3Y9OBus8u3oXS4iOTV6q8nJgjDebs+liP38HrjIsD7UL X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Mar 03, 2025 at 12:06:18PM +0100, Hannes Reinecke wrote: > On 3/3/25 08:48, Hannes Reinecke wrote: > > On 2/28/25 11:47, Hannes Reinecke wrote: > > > Hi Sagi, > > > > > > enabling TLS on latest linus tree reliably crashes my system: > > > > > > [  487.018058] ------------[ cut here ]------------ > > > [  487.024046] WARNING: CPU: 9 PID: 6159 at mm/slub.c:4719 > > > free_large_kmalloc+0x15/0xa0 > [ .. ] > > > > > > Haven't found a culprit for that one for now, started bisecting. > > > Just wanted to report that as a heads-up, maybe you have some idea. > > > > > > > bisect is pointing to > > 9aec2fb0fd5e ("slab: allocate frozen pages") > > and, indeed, reverting this patch on top of linus current resolves > > the issue. > > > > Sorry Matthew. > > > It's getting even worse; after reverting above patch I'm getting a crash > here: If you revert that, you also need to revert 8c6e2d122b71. But let me dig into the original problem. The fact that it's kmalloc_large might be a clue.