Hello, syzbot found the following issue on: HEAD commit: 511cce163b75 Merge tag 'net-6.0-rc8' of git://git.kernel.o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=155eade4880000 kernel config: https://syzkaller.appspot.com/x/.config?x=4520785fccee9b40 dashboard link: https://syzkaller.appspot.com/bug?extid=2c2bb573a9524a95e787 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14ecac35080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15668b38880000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2c2bb573a9524a95e787@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3607 at include/linux/swapops.h:323 change_pte_range+0x11f4/0x1ab0 mm/mprotect.c:271 Modules linked in: CPU: 0 PID: 3607 Comm: syz-executor171 Not tainted 6.0.0-rc7-syzkaller-00130-g511cce163b75 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:make_pte_marker_entry include/linux/swapops.h:323 [inline] RIP: 0010:make_pte_marker include/linux/swapops.h:346 [inline] RIP: 0010:change_pte_range+0x11f4/0x1ab0 mm/mprotect.c:271 Code: e8 c1 02 bd ff 4c 8b 74 24 18 49 bd 00 00 00 00 00 fc ff df e9 8d fc ff ff e8 a8 02 bd ff 0f 0b e9 72 f4 ff ff e8 9c 02 bd ff <0f> 0b 48 8d 9c 24 00 01 00 00 48 c1 eb 03 42 80 3c 2b 00 74 0d 48 RSP: 0018:ffffc9000399f580 EFLAGS: 00010293 RAX: ffffffff81cc93c4 RBX: 0000000000000000 RCX: ffff88801fdfbb00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000399f728 R08: ffffffff81cc8706 R09: ffffed10045001a1 R10: ffffed10045001a1 R11: 1ffff110045001a0 R12: 000000002063d000 R13: dffffc0000000000 R14: ffff888027d251e8 R15: ffff888027d251e8 FS: 000055555742e300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005d84c8 CR3: 000000007a01e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> change_pmd_range mm/mprotect.c:409 [inline] change_pud_range mm/mprotect.c:438 [inline] change_p4d_range mm/mprotect.c:459 [inline] change_protection_range mm/mprotect.c:483 [inline] change_protection+0xc1f/0x16d0 mm/mprotect.c:505 uffd_wp_range mm/userfaultfd.c:718 [inline] mwriteprotect_range+0x50c/0x5a0 mm/userfaultfd.c:768 userfaultfd_writeprotect fs/userfaultfd.c:1827 [inline] userfaultfd_ioctl+0x2733/0x3230 fs/userfaultfd.c:1999 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fbc63941bb9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff43ddba98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbc63941bb9 RDX: 00000000200000c0 RSI: 00000000c018aa06 RDI: 0000000000000003 RBP: 00007fbc63905d60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbc63905df0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
