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@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ 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: <TASK> 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 </TASK> --- 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@xxxxxxxxxxxxxxxx. 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
