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[2003:cb:c711:c600:c1d6:7158:f946:f083]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3749ef80155sm1579231f8f.84.2024.08.29.07.36.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 Aug 2024 07:36:22 -0700 (PDT) Message-ID: Date: Thu, 29 Aug 2024 16:36:21 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: linux-next20240827 onwards: KVM guest crash BUG: Bad page state in process ksmd To: "Aithal, Srikanth" , Andrew Morton , linux-mm , Linux-Next Mailing List References: <83847d6b-9533-4a5e-a2e1-763021a32b9b@amd.com> From: David Hildenbrand Cc: Matthew Wilcox Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <83847d6b-9533-4a5e-a2e1-763021a32b9b@amd.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Stat-Signature: o3wzegbuo7ee6yifpn6qzapqdpcjna5p X-Rspamd-Queue-Id: 8D06280015 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1724942187-126748 X-HE-Meta: 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 ohetIjB+ qPqk8xRwBOTGzlIpRSW9KXPPqP53MLARydl6Wlyc+uSc3rSz5uZQ6qUEOEzDL1eKZV4JSSbBE6ZWRRsMy31jeWp9peX39vzmcZVt4KJcT213BbJ3R/g3phq6EEwiSK+jdyRN2zN18+VspKOZSgd4bHZLfhf/gYpVAZjr7x027r8COvalTn7riD8VEuRJkbQ7h0gB/rlDwQWIYdcAn9cNfnUXmQO/vi0rtC6I7xzQzf1teCiNSv15oB6XsLdu87pUy7PCqCMjnsUMOxD5LEHIIbOq7auBBLUcAbDJXgTyOO36JDsgfYOh2LmNCVNw9y1Fv+kbGXcsOyS01WV0jGEuUiK0s3ayaCHqGQR6ZVN67bvp7pwiMbseBmgUPhv+ohbmzU/QnndpWJoqaqFN3xm0vFM3UUfSGvJduL1fa 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 29.08.24 13:28, Aithal, Srikanth wrote: > Hello, > > Starting linux-next20240827 build, running QEMU KVM instance with option > to freeze the CPU at the very beginning and then continue results in > below guest crash. Disabling CONFIG_KSM will make this issue go away. > Same issue exists with todays linux-next as well. > > /SecCoreStartupWithStack(0xFFFCC000, 0x820000) > error: kvm run failed Bad address > RAX=0000000000232000 RBX=00000000fffdb101 RCX=000000000081fab0 > RDX=00000000fffd7b03 > RSI=0000000000807000 RDI=00000000fffd262b RBP=000000000081fc00 > RSP=000000000081faa0 > R8 =00000000fffd7af7 R9 =0000000000000071 R10=0000000000400000 > R11=0000000000000000 > R12=00000000fffcc094 R13=00000000fffcc000 R14=00000000ffdce000 > R15=0000000000000600 > RIP=00000000fffd1cb5 RFL=00000087 [--S--PC] CPL=0 II=0 A20=1 SMM=0 HLT=0 > ES =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > CS =0038 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] > SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > DS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > FS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > GS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT > TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy > GDT=     00000000fffffed0 0000003f > IDT=     000000000081fd70 0000021f > CR0=80000033 CR2=0000000000000000 CR3=0000000000800000 CR4=00000660 > DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 > DR3=0000000000000000 > DR6=00000000ffff0ff0 DR7=0000000000000400 > EFER=0000000000000500 > Code=05 00 10 00 00 49 81 ee 00 10 00 00 48 3d 00 00 00 02 77 12 <41> 81 > 7e 28 5f 46 56 48 75 e1 49 3b 46 20 73 05 eb d9 4d 89 ee 48 8d 8d 10 ff > ff ff ba 02 > / > > _Host dmesg throws:_ > > /[  232.158038] BUG: Bad page state in process ksmd pfn:404740a > [  232.164393] page: refcount:0 mapcount:1 mapping:0000000000000000 > index:0x7f8687c0a pfn:0x404740a > [  232.164401] flags: > 0x17ffffc0020819(locked|uptodate|dirty|owner_2|swapbacked|node=0|zone=2|lastcpupid=0x1fffff) > [  232.164412] raw: 0017ffffc0020819 dead000000000100 dead000000000122 > 0000000000000000 > [  232.164417] raw: 00000007f8687c0a 0000000000000000 0000000000000000 > 0000000000000000 > [  232.164420] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set Might be related to Willy's page flag rework. Not 100% sure, though, what's happening here. Is there a way to revert the recent changes from Willy to include/linux/page-flags.h and see if the problem goes away? -- Cheers, David / dhildenb