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Fri, 14 Jun 2024 00:54:38 -0700 (PDT) Received: from krava ([212.20.115.60]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a6f56f41737sm155315366b.160.2024.06.14.00.54.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Jun 2024 00:54:37 -0700 (PDT) From: Jiri Olsa X-Google-Original-From: Jiri Olsa Date: Fri, 14 Jun 2024 09:54:35 +0200 To: Bert Karwatzki Cc: "Liam R. Howlett" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , linux-next@vger.kernel.org Subject: Re: commit 1c29a32ce65f4cd0f1c causes Bad rss-counter state and firefox-esr crash in linux-next-20240613 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 0B679A000D X-Stat-Signature: 3fanwimenawn8z1k9qospdzyh9us6rsg X-HE-Tag: 1718351679-667484 X-HE-Meta: U2FsdGVkX18v6r5u6FICDOBfp5oodlXL+YJZJL8aJX8ohksBnIrlVLicU3v3PD0ZvyhG3uUOTaYqQDhkeR7BIWoDgjiCO7W03m7k8olZrzoE12m7V8GCLY+mOdgnZVQtN6SCb7fhik/SnoTl2U56uIApNXfDdOUUWKBze4HmYV7ifaRZdBe6k9FCyNFRN5mHTsV4pjMICcunmLLdP6yQ+9WQOD57nLcr5zU9Rw860xu9XLaXobZ//6gdY5SMoIORqAdUXOPwcFmPj0zABkq576+QAQj24a8qBNEplj0o9eN/ozAvKD3EhE8JYVnIP5zgyaK9qBYbZTFaTCPPvnmbEjFDTipixkTIaPsDNpJSZPH+fFzAXwukG1yy7/bxdeoEjTnIyBQl37BuaXmC3XzL/3lEE+jH99YOsaQaW0E/Xjb95FEZMg3DOlS2RemJ3JW/NxGy+cnO8qOOmWDOh7D8eWE2Pnf6hVzdaX2XJvXA+dLWU+SiovYLWSGhGzdYdmuzIM9KT+UoWbEmaOnerWkxnw5HKzx/onatlcyqWWBecOWoTs8Q9Dq3lUmhijlIBcpouZl0LsgMAQCSMpB6t+IMXgqxb5oPnh4YKTBI+ixde/5Gv52Mcxdg9RGRqq5gg4M1oBkG5zVUvYQglZxsfH9e7JrTHdQu+fvJidWEor0r0PI1qVp4VEdMnBeyrKvrsGPlG0WzSswF4xoPadezYcWgh9e3mrQM/fWUxQGFHMxfS1MCqgT+B83mQdQZ0aygregbp8Esn5DUgjeDcSm9OwllC5PHh7rUKM3NtOaat3+af21qogZzBZEILdI1t3DZeW3mWS5cqAbciql8MH6V0kaJzcaC2PLoSnKC/Fw43Z92DNWKmv3qF0k7CvYhRHsGLbfqpPH0RtEvNSuUDTHW2yQTqJLQibQaPIuo6tpi3PKQeq4mZYbuLqOTSx6aU9QG1A9If0Nf+Jlry0qo1/F/7Wf 2Z8WjuKn VDuGGwq3FmY7gNg0uzCsLHgPtcI59hB1LScPoT8hCe1KH8O+FtQl340cAeZ+SJPs0fAiwhzrdYK/2XDR8l+lkA4zT6MyBDra6xBZ9nFaegfrj59A2JMYZjPL+pOBVJoD6qfn2h8ZrhcrYZtIqxqsFc1kqLscPmslPpRqBL6xdouxxjXUEtAF/L7zZQkyrGClTbkHjGTCYDndfDEhNFz3sH8F4rLMuINiWW3ukxl3VzsPrXljpncdvpCoH1qY6Yrmzk92nRc3i7po1inEElkq5K8UbnxMZbrrb8mMaolrKJm319bKeiKNdCTZ9lJFF/NDBXiTQapag3CE1rXCGhwr6dqEPlPNzQSz6XrgL4sxbs9RHEYo= 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 Fri, Jun 14, 2024 at 01:40:54AM +0200, Bert Karwatzki wrote: > Since linux-next-20240613 firefox-esr crashes after several minutes of browsing > giving the following error messages in dmesg: > [ T2343] BUG: Bad rss-counter state mm:00000000babe0c39 type:MM_ANONPAGES val:86 > [ T4063] show_signal_msg: 16 callbacks suppressed > [ T4063] Isolated Web Co[4063]: segfault at 396d1686c000 ip 0000396d1686c000 sp > 00007ffd767b30a8 error 14 likely on CPU 7 (core 3, socket 0) > [ T4063] Code: Unable to access opcode bytes at 0x396d1686bfd6. > [ T4211] BUG: Bad rss-counter state mm:00000000cd9fc541 type:MM_ANONPAGES > val:817 > [ T3798] BUG: Bad rss-counter state mm:00000000432d87c2 type:MM_ANONPAGES > val:181 > [ T5548] BUG: Bad rss-counter state mm:00000000034aa27a type:MM_ANONPAGES > val:242 > [ T3823] BUG: Bad rss-counter state mm:0000000099734197 type:MM_ANONPAGES > val:137 > [ T1] BUG: Bad rss-counter state mm:000000005e5e2f2f type:MM_ANONPAGES val:28 > > (these are the error messages of several crashes and the error seems to affect > other processes, too (T1)) > > The crash can be provoked to appear in ~1min by opening large numbers of tabs in > firefox-esr (by holding pressing ctrl+t for some time). With this I bisected the > error to commit "1c29a32ce65f mm/mmap: use split munmap calls for MAP_FIXED" and > reverting this commit in linux-next-20240613 fixes the issue for me. +1, bpf selftests are failing for me because mmap fails with: mmap(0x7f9361bc9000, 4096, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 4, 0) = -1 EBUSY (Device or resource busy) did not get to the cause, but reverting the 1c29a32ce65f fixes it for me thanks, jirka > > Bert Karwatzki > > PS. Please CC me when answering, I'm not subscribed to the lists. >