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Tue, 07 Feb 2023 06:31:17 -0800 (PST) Date: Tue, 07 Feb 2023 06:31:17 -0800 In-Reply-To: <3151379.1675779370@warthog.procyon.org.uk> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000025e37805f41d0049@google.com> Subject: Re: [syzbot] kernel BUG in __tlb_remove_page_size (2) From: syzbot To: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, dhowells@redhat.com, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, npiggin@gmail.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, will@kernel.org Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: 6ow6ryu8m7jk1thdo9dzoisrsn4ihjj3 X-Rspam-User: X-Rspamd-Queue-Id: 1967E40002 X-Rspamd-Server: rspam06 X-HE-Tag: 1675780277-43157 X-HE-Meta: U2FsdGVkX19bqIZvaIH6nx9FVe754wMf9L/tU4jKlqLwmzmdWmnBJk2VUDc1rRjV0iEo63bsAlPmJiiDvu316zG92bOuF8YYjgcwbu3b6tSLgDQwe25lJd5cgUFUj2829HfxUW2h7BHm8Rtgf22DRfAcVDgEcVtaM+qjE/UJnfgxQltdD06cWUI2531xQcN/1BJNB6mKjhIgElvjDoU7VF7oQB/BMDU8dh2uQ4QKfw77qo6KPCGKV1lt2+S84KADDPllvUjcq1NkSLVfXxbxXcsWrW3Pq6Zk/fjjmerBBAtJjoEw37VgYSFSZojoaLzyfSwlSWH8paLsHvfAAJb/h3StLd9RomwX0C+9viUDCSJKmzUaC9g5Sep/z2u15D+mLZB50zYTZGGXPjrkL6xMquy+TtPyV4kc9quywQUzTYbNxfIZrXaI0tDAwbJxqmzXkCfeuUNIU4Tr415Q5NuNjb2GmxJEaZBGhyoclXhxoKHqL9HzfMUwEJWCbmxNt3hXQWWhRyfrNJoaFMQOTeG29zjGJxweybYpdiRQThbZRJ2Co3Q1voA9KP5mPIodE/rufocjk0btuRX1uoHW7ldDwsfWvoMwFW+NXHA9egqK6imfZ7DGtouxO7shgXYB3JoLV9KXm2du6tlpbuh3yJMnImOnVPmkvcm7Fb4wjUoG4j2kbgZ+b5WmQsHNMN6FSsEzrO6FiiR1Ej9E38oGr5Xz5Q1J/34/gnC0wbHbq5jPKY52GQKUlfC4PDVMM60KLg3seqsBrcj0J53+93TLySX8HtJa6w8lQqBT+E26ZPzrVe70a645nFCmHEoH305QukxF+8JQUCx9DQNMfTF/vWyyXCiJXl83qAWHAgnHfxRMuGGnbYegkVwPuYVhzqy0XmaaHLI09Z7shEyqfV5ncIAVlZyrRnOdDE4CZvrJwxe7ZfRcfgwNP+Mm4RF8oQu1zmXspcn9i4rmnME1doINUsd WcyzOa9Q 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 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: Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: INFO: rcu detected stall in corrupted rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P5549 } 2638 jiffies s: 2817 root: 0x0/T rcu: blocking rcu_node structures (internal RCU debug): Tested on: commit: fab9eebf iov_iter: Kill ITER_PIPE git tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/ iov-fixes console output: https://syzkaller.appspot.com/x/log.txt?x=14e2c6f3480000 kernel config: https://syzkaller.appspot.com/x/.config?x=facc234423e66dc6 dashboard link: https://syzkaller.appspot.com/bug?extid=d87dd8e018fd2cc2528b compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Note: no patches were applied.