Hello, syzbot found the following issue on: HEAD commit: ac347a0655db Merge tag 'arm64-fixes' of git://git.kernel.o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15ff3057680000 kernel config: https://syzkaller.appspot.com/x/.config?x=287570229f5c0a7c dashboard link: https://syzkaller.appspot.com/bug?extid=7ca4b2719dc742b8d0a4 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=162a25ff680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13d62338e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/00e30e1a5133/disk-ac347a06.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/07c43bc37935/vmlinux-ac347a06.xz kernel image: https://storage.googleapis.com/syzbot-assets/c6690c715398/bzImage-ac347a06.xz The issue was bisected to: commit 12f6b01a0bcbeeab8cc9305673314adb3adf80f7 Author: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx> Date: Mon Aug 21 14:15:15 2023 +0000 fs/proc/task_mmu: add fast paths to get/clear PAGE_IS_WRITTEN flag bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14e5591f680000 final oops: https://syzkaller.appspot.com/x/report.txt?x=16e5591f680000 console output: https://syzkaller.appspot.com/x/log.txt?x=12e5591f680000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7ca4b2719dc742b8d0a4@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 12f6b01a0bcb ("fs/proc/task_mmu: add fast paths to get/clear PAGE_IS_WRITTEN flag") ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5059 at mm/memory.c:1520 zap_pte_range mm/memory.c:1520 [inline] WARNING: CPU: 0 PID: 5059 at mm/memory.c:1520 zap_pmd_range mm/memory.c:1582 [inline] WARNING: CPU: 0 PID: 5059 at mm/memory.c:1520 zap_pud_range mm/memory.c:1611 [inline] WARNING: CPU: 0 PID: 5059 at mm/memory.c:1520 zap_p4d_range mm/memory.c:1632 [inline] WARNING: CPU: 0 PID: 5059 at mm/memory.c:1520 unmap_page_range+0x1711/0x2c00 mm/memory.c:1653 Modules linked in: CPU: 0 PID: 5059 Comm: syz-executor416 Not tainted 6.6.0-syzkaller-16039-gac347a0655db #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:zap_pte_range mm/memory.c:1520 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1582 [inline] RIP: 0010:zap_pud_range mm/memory.c:1611 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1632 [inline] RIP: 0010:unmap_page_range+0x1711/0x2c00 mm/memory.c:1653 Code: 0f 8e 4a 12 00 00 48 8b 44 24 30 31 ff 0f b6 58 08 89 de e8 d1 00 bf ff 84 db 0f 85 88 f3 ff ff e9 0a f4 ff ff e8 8f 05 bf ff <0f> 0b e9 77 f3 ff ff e8 83 05 bf ff 48 83 44 24 10 08 e9 9d f6 ff RSP: 0018:ffffc900034bf8f8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffffffff81c894fd RDX: ffff88801ff66040 RSI: ffffffff81c89561 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888074017008 R14: dffffc0000000000 R15: 0000000000000004 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f70d28ca0d0 CR3: 000000001d5be000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> unmap_single_vma+0x194/0x2b0 mm/memory.c:1699 unmap_vmas+0x229/0x470 mm/memory.c:1743 exit_mmap+0x1ad/0xa60 mm/mmap.c:3308 __mmput+0x12a/0x4d0 kernel/fork.c:1349 mmput+0x62/0x70 kernel/fork.c:1371 exit_mm kernel/exit.c:567 [inline] do_exit+0x9ad/0x2ae0 kernel/exit.c:858 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021 __do_sys_exit_group kernel/exit.c:1032 [inline] __se_sys_exit_group kernel/exit.c:1030 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f70d284ef39 Code: Unable to access opcode bytes at 0x7f70d284ef0f. RSP: 002b:00007ffc9cfa2fb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f70d284ef39 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007f70d28c9270 R08: ffffffffffffffb8 R09: 65732f636f72702f R10: 0000000000000000 R11: 0000000000000246 R12: 00007f70d28c9270 R13: 0000000000000000 R14: 00007f70d28c9cc0 R15: 00007f70d2820ae0 </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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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
