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Mon, 04 Nov 2024 13:57:29 -0800 (PST) Date: Mon, 04 Nov 2024 13:57:29 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67294349.050a0220.701a.0010.GAE@google.com> Subject: [syzbot] [mm?] WARNING in folio_update_gen From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 9ED9A1A0014 X-Stat-Signature: kjs68m4nkdnouzztenmzugm9yg7i5y4y X-Rspam-User: X-HE-Tag: 1730757409-837206 X-HE-Meta: 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 lXzT/Wkd 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 sb++E71q 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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: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: c88416ba074a Add linux-next specific files for 20241101 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12634587980000 kernel config: https://syzkaller.appspot.com/x/.config?x=704b6be2ac2f205f dashboard link: https://syzkaller.appspot.com/bug?extid=e5a74963d40b07387bdf compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/760a8c88d0c3/disk-c88416ba.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/46e4b0a851a2/vmlinux-c88416ba.xz kernel image: https://storage.googleapis.com/syzbot-assets/428e2c784b75/bzImage-c88416ba.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e5a74963d40b07387bdf@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 85 at mm/vmscan.c:3140 folio_update_gen+0x23d/0x250 mm/vmscan.c:3140 Modules linked in: CPU: 0 UID: 0 PID: 85 Comm: kswapd0 Not tainted 6.12.0-rc5-next-20241101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:folio_update_gen+0x23d/0x250 mm/vmscan.c:3140 Code: 00 48 3b 4c 24 60 75 2a 48 c1 e8 29 83 e0 07 ff c8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 74 c0 bf ff 90 <0f> 0b 90 e9 91 fe ff ff e8 46 9f ee 09 66 0f 1f 44 00 00 90 90 90 RSP: 0018:ffffc900020deb40 EFLAGS: 00010293 RAX: ffffffff81d5fd8c RBX: 0000000000000000 RCX: ffff88801cbb8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900020dec00 R08: ffffffff81d5fc19 R09: 1ffff1100d562d00 R10: dffffc0000000000 R11: ffffed100d562d01 R12: 0000000000000003 R13: 1ffff9200041bd70 R14: ffffc900020deb80 R15: ffffea0001308000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7fecc34866 CR3: 00000000223a2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: walk_pmd_range_locked+0x92b/0xf90 mm/vmscan.c:3514 walk_pmd_range mm/vmscan.c:3594 [inline] walk_pud_range+0x1f16/0x2310 mm/vmscan.c:3621 walk_p4d_range mm/pagewalk.c:259 [inline] walk_pgd_range+0x4a9/0x17e0 mm/pagewalk.c:305 __walk_page_range+0x15f/0x700 mm/pagewalk.c:412 walk_page_range_mm+0x58f/0x7c0 mm/pagewalk.c:505 walk_mm mm/vmscan.c:3665 [inline] try_to_inc_max_seq+0xdd9/0x13b0 mm/vmscan.c:3902 get_nr_to_scan mm/vmscan.c:4740 [inline] try_to_shrink_lruvec+0xb30/0xc70 mm/vmscan.c:4783 shrink_one+0x3b9/0x850 mm/vmscan.c:4832 shrink_many mm/vmscan.c:4895 [inline] lru_gen_shrink_node mm/vmscan.c:4973 [inline] shrink_node+0x37cd/0x3e60 mm/vmscan.c:5954 kswapd_shrink_node mm/vmscan.c:6783 [inline] balance_pgdat mm/vmscan.c:6975 [inline] kswapd+0x1ca9/0x3700 mm/vmscan.c:7244 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup