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Mon, 04 Mar 2024 20:38:22 -0800 (PST) Date: Mon, 04 Mar 2024 20:38:22 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000827c710612e269ff@google.com> Subject: [syzbot] [mm?] WARNING in try_to_unmap_one 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-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 30977120003 X-Stat-Signature: fezihscfngjptccdnjty6mirsjea9esy X-HE-Tag: 1709613502-438088 X-HE-Meta: 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 J0ICKpVa 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 KESzlftf 98jpWh8A4wudTN2A2Nm6kAaaxZM7iDr64Bml9bYEd26B25hr29e9xflXSY068fWSuovXjpf8YkI0r8UtV7MDnrpBgqCvwqeqq6vPLdXGooL4Taza/cC8KzNjx6+WmwQ+npFdnLngdLqOMQkPGplS0K+Q4EkORko3vy4DCW9WpU16zeTZEUT7dh6k0A41y7GIG6idQyEV+u770Hklla+RlyJdlD6HggHUDk0zLpfa8Z16J+swwii6cZedUOu4QXStEbTt5ViSeSfDDR85bGA2BKf+I17/tJEhj842Eb5A1FY4xIXXFmtwV4/3olXTOL5jhCuZ1QCl0nCw+lwlhx1GlKDeo9MScgLLyS8/JO6CZyU= 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: 87adedeba51a Merge tag 'net-6.8-rc7' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15359306180000 kernel config: https://syzkaller.appspot.com/x/.config?x=dc48776003e506af dashboard link: https://syzkaller.appspot.com/bug?extid=28895085dfb33190ed3c compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-87adedeb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/531f9afd8b25/vmlinux-87adedeb.xz kernel image: https://storage.googleapis.com/syzbot-assets/015cfa882009/bzImage-87adedeb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+28895085dfb33190ed3c@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 109 at arch/x86/include/asm/pgtable.h:404 pte_uffd_wp arch/x86/include/asm/pgtable.h:404 [inline] WARNING: CPU: 1 PID: 109 at arch/x86/include/asm/pgtable.h:404 try_to_unmap_one+0x1a84/0x29b0 mm/rmap.c:1891 Modules linked in: CPU: 1 PID: 109 Comm: kswapd0 Not tainted 6.8.0-rc6-syzkaller-00120-g87adedeba51a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:pte_uffd_wp arch/x86/include/asm/pgtable.h:404 [inline] RIP: 0010:try_to_unmap_one+0x1a84/0x29b0 mm/rmap.c:1891 Code: e9 d4 00 00 00 e8 8c 72 b4 ff 4d 89 ec 31 ff 41 83 e4 02 4c 89 e6 e8 8b 6d b4 ff 4d 85 e4 0f 84 8b 04 00 00 e8 6d 72 b4 ff 90 <0f> 0b 90 e8 64 72 b4 ff 48 83 cd 04 e9 21 f9 ff ff e8 56 72 b4 ff RSP: 0018:ffffc90000ddf110 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea0000021240 RCX: ffffffff81d771e5 RDX: ffff88801ac80000 RSI: ffffffff81d771f3 RDI: 0000000000000007 RBP: 07ffffffffa2e20a R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000004 R12: 0000000000000002 R13: 0000000000849c47 R14: dffffc0000000000 R15: ffff8880118c2f80 FS: 0000000000000000(0000) GS:ffff88802c300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000027f48000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rmap_walk_anon+0x228/0x580 mm/rmap.c:2599 rmap_walk mm/rmap.c:2676 [inline] rmap_walk mm/rmap.c:2671 [inline] try_to_unmap+0x174/0x1c0 mm/rmap.c:1956 shrink_folio_list+0x1cc7/0x3ea0 mm/vmscan.c:1253 evict_folios+0x6e7/0x1b90 mm/vmscan.c:4521 try_to_shrink_lruvec+0x638/0xa10 mm/vmscan.c:4726 shrink_one+0x3f8/0x7b0 mm/vmscan.c:4765 shrink_many mm/vmscan.c:4828 [inline] lru_gen_shrink_node mm/vmscan.c:4929 [inline] shrink_node+0x21d0/0x3790 mm/vmscan.c:5888 kswapd_shrink_node mm/vmscan.c:6693 [inline] balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6883 kswapd+0x5be/0xc00 mm/vmscan.c:7143 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 --- 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