Cc: Peter and Muhammad On Wed, Nov 15, 2023 at 6:41 AM syzbot <syzbot+e94c5aaf7890901ebf9b@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: c42d9eeef8e5 Merge tag 'hardening-v6.7-rc2' of git://git.k.. > git tree: upstream > console+strace: https://syzkaller.appspot.com/x/log.txt?x=13626650e80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=84217b7fc4acdc59 > dashboard link: https://syzkaller.appspot.com/bug?extid=e94c5aaf7890901ebf9b > 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=15d73be0e80000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13670da8e80000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/a595d90eb9af/disk-c42d9eee.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/c1e726fedb94/vmlinux-c42d9eee.xz > kernel image: https://storage.googleapis.com/syzbot-assets/cb43ae262d09/bzImage-c42d9eee.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+e94c5aaf7890901ebf9b@xxxxxxxxxxxxxxxxxxxxxxxxx > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 5071 at arch/x86/include/asm/pgtable.h:403 pte_uffd_wp arch/x86/include/asm/pgtable.h:403 [inline] > WARNING: CPU: 1 PID: 5071 at arch/x86/include/asm/pgtable.h:403 pagemap_scan_pmd_entry+0x1d27/0x23f0 fs/proc/task_mmu.c:2146 > Modules linked in: > CPU: 1 PID: 5071 Comm: syz-executor182 Not tainted 6.7.0-rc1-syzkaller-00019-gc42d9eeef8e5 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 > RIP: 0010:pte_uffd_wp arch/x86/include/asm/pgtable.h:403 [inline] > RIP: 0010:pagemap_scan_pmd_entry+0x1d27/0x23f0 fs/proc/task_mmu.c:2146 > Code: ff ff e8 5c 23 76 ff 48 89 e8 31 ff 83 e0 02 48 89 c6 48 89 04 24 e8 d8 1e 76 ff 48 8b 04 24 48 85 c0 74 25 e8 3a 23 76 ff 90 <0f> 0b 90 e9 71 ff ff ff 4c 89 74 24 68 4c 8b 74 24 10 c7 44 24 28 > RSP: 0018:ffffc9000392f870 EFLAGS: 00010293 > RAX: 0000000000000000 RBX: 0000000020001000 RCX: ffffffff82116da8 > RDX: ffff88801aae8000 RSI: ffffffff82116db6 RDI: 0000000000000007 > RBP: 0000000012c7ac67 R08: 0000000000000007 R09: 0000000000000000 > R10: 0000000000000002 R11: 0000000000000002 R12: dffffc0000000000 > R13: 0000000000000400 R14: 0000000000000000 R15: ffff8880745f4000 > FS: 00005555557a8380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000020000d60 CR3: 0000000074627000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > walk_pmd_range mm/pagewalk.c:143 [inline] > walk_pud_range mm/pagewalk.c:221 [inline] > walk_p4d_range mm/pagewalk.c:256 [inline] > walk_pgd_range+0xa48/0x1870 mm/pagewalk.c:293 > __walk_page_range+0x630/0x770 mm/pagewalk.c:395 > walk_page_range+0x626/0xa80 mm/pagewalk.c:521 > do_pagemap_scan+0x40d/0xcd0 fs/proc/task_mmu.c:2437 > do_pagemap_cmd+0x5e/0x80 fs/proc/task_mmu.c:2478 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:871 [inline] > __se_sys_ioctl fs/ioctl.c:857 [inline] > __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857 > do_syscall_x64 arch/x86/entry/common.c:51 [inline] > do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 > entry_SYSCALL_64_after_hwframe+0x63/0x6b > RIP: 0033:0x7f9c3ea93669 > Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007ffe1d95e918 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007ffe1d95e920 RCX: 00007f9c3ea93669 > RDX: 0000000020000d40 RSI: 00000000c0606610 RDI: 0000000000000003 > RBP: 00007f9c3eb06610 R08: 65732f636f72702f R09: 65732f636f72702f > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 > R13: 00007ffe1d95eb58 R14: 0000000000000001 R15: 0000000000000001 > </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 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
