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[2a01:4a0:11::2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43aba539450sm189870885e9.21.2025.03.03.06.05.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Mar 2025 06:05:47 -0800 (PST) Message-ID: Date: Mon, 3 Mar 2025 15:05:47 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Kernel oops with 6.14 when enabling TLS To: Matthew Wilcox Cc: Sagi Grimberg , "linux-nvme@lists.infradead.org" , "linux-block@vger.kernel.org" , linux-mm@kvack.org References: <08c29e4b-2f71-4b6d-8046-27e407214d8c@suse.com> <509dd4d3-85e9-40b2-a967-8c937909a1bf@suse.com> <913d3824-04c7-4cb1-a87b-01f9241a37aa@suse.com> Content-Language: en-US From: Hannes Reinecke In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam02 X-Stat-Signature: mffu77rort8489owns8skkh15rebb3yi X-Rspamd-Queue-Id: E1366160044 X-Rspam-User: X-HE-Tag: 1741010749-390239 X-HE-Meta: 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 ZdPeuNFh 4uNk9YLAzLQI7jbeiq9H3SL4ZxQCV1iV7cWPHrPBLUUAnsVekzf5inADigTCmQqzmU75LA3d2f44rlqtwLvzklLcN1Jt1yAoqNlfFOPnV4xxgCYTWT/zXQrEyxMDOO7OoK8gcweT7met4IfJHaI9xmspi97pqaHkeAc8KENmyUpXVS/GQolF/pwWG/DgQHF3ADaOPd9BuTOkovyL3Dx5vGNuLLg6lHBAHeuVwz2sOxcGDJFfsxlhCc6v8s5jiip1cEy7OHHYcdTfEuAv4ZvvZuvNdqyTCdq7w8J6dlQGi+pKcPP8ZjiipsMbHVEfZDPtJteV4Ghp68VBgg4f4prGoHzlFXi1pqSTR8i/bx3MyfpLAyrNDylq5zv0jAM9vmTP3d1HWTCryjHpf8O1EbbdAhp0sj9mTm/R6WxNFMe7Lyj/WNLXYh2ThPxAEqrdjxdbl82L/ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000280, 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 3/3/25 14:57, Matthew Wilcox wrote: > 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. Let me know if you need more details. Incidentally, there's a blktest unit for TLS now: https://github.com/osandov/blktests/pull/158 which should allow you to recreate the issue locally. Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.com +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich