------------[ cut here ]------------ kernel BUG at mm/memory.c:2218! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3604 Comm: syz-executor135 Not tainted 6.0.0-syzkaller-09413-g4899a36f91a9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:vmf_insert_pfn_prot+0x248/0x460 mm/memory.c:2218 Code: 0f 0b e8 db 27 c6 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 a7 24 c6 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 b8 27 c6 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 a7 27 c6 ff 4d 21 ee 4c 89 RSP: 0018:ffffc90003c0f9d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff92000781f3d RCX: 0000000000000000 RDX: ffff888026ed0000 RSI: ffffffff81b51f78 RDI: 0000000000000007 RBP: ffff8880758ef738 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000000 R12: 0000000020000000 R13: 000000000001d55e R14: 000000000c040471 R15: 0000000000000020 FS: 0000555555aa43c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 0000000074b79000 CR4: 0000000000350ee0 Call Trace: drm_gem_shmem_fault+0x1e3/0x290 drivers/gpu/drm/drm_gem_shmem_helper.c:562 __do_fault+0x10d/0x610 mm/memory.c:4173 do_read_fault mm/memory.c:4524 [inline] do_fault mm/memory.c:4653 [inline] handle_pte_fault mm/memory.c:4917 [inline] __handle_mm_fault+0x2130/0x39b0 mm/memory.c:5059 handle_mm_fault+0x1c8/0x780 mm/memory.c:5157 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1407 handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x94/0x170 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_generic_string+0x2c/0x40 arch/x86/lib/copy_user_64.S:133 Code: cb 83 fa 08 72 27 89 f9 83 e1 07 74 15 83 e9 08 f7 d9 29 ca 8a 06 88 07 48 ff c6 48 ff c7 ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 RSP: 0018:ffffc90003c0fdf0 EFLAGS: 00050246 RAX: 0000000000000001 RBX: 0000000000000018 RCX: 0000000000000003 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffc90003c0fe58 RBP: ffffc90003c0fe58 R08: 0000000000000001 R09: ffffc90003c0fe6f R10: fffff52000781fcd R11: 000000000008c07c R12: 00007fffffffefe8 R13: 0000000020000000 R14: 0000000000000007 R15: 0000000020000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline] _copy_from_user+0x137/0x170 lib/usercopy.c:16 copy_from_user include/linux/uaccess.h:152 [inline] copy_dev_ioctl fs/autofs/dev-ioctl.c:86 [inline] _autofs_dev_ioctl+0x104/0x7f0 fs/autofs/dev-ioctl.c:620 autofs_dev_ioctl+0x17/0x20 fs/autofs/dev-ioctl.c:693 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1b7d5a72f9 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:00007ffc0ba1a8d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffc0ba1a8e8 RCX: 00007f1b7d5a72f9 RDX: 0000000020000000 RSI: 00000000c0189378 RDI: 0000000000000003 RBP: 00007ffc0ba1a8e0 R08: 00007ffc0ba1a8e0 R09: 00007f1b7d56a1c0 R10: 00007ffc0ba1a8e0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x248/0x460 mm/memory.c:2218 Code: 0f 0b e8 db 27 c6 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 a7 24 c6 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 b8 27 c6 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 a7 27 c6 ff 4d 21 ee 4c 89 RSP: 0018:ffffc90003c0f9d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff92000781f3d RCX: 0000000000000000 RDX: ffff888026ed0000 RSI: ffffffff81b51f78 RDI: 0000000000000007 RBP: ffff8880758ef738 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000000 R12: 0000000020000000 R13: 000000000001d55e R14: 000000000c040471 R15: 0000000000000020 FS: 0000555555aa43c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f16c917aa70 CR3: 0000000074b79000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: cb lret 1: 83 fa 08 cmp $0x8,%edx 4: 72 27 jb 0x2d 6: 89 f9 mov %edi,%ecx 8: 83 e1 07 and $0x7,%ecx b: 74 15 je 0x22 d: 83 e9 08 sub $0x8,%ecx 10: f7 d9 neg %ecx 12: 29 ca sub %ecx,%edx 14: 8a 06 mov (%rsi),%al 16: 88 07 mov %al,(%rdi) 18: 48 ff c6 inc %rsi 1b: 48 ff c7 inc %rdi 1e: ff c9 dec %ecx 20: 75 f2 jne 0x14 22: 89 d1 mov %edx,%ecx 24: c1 e9 03 shr $0x3,%ecx 27: 83 e2 07 and $0x7,%edx * 2a: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2d: 89 d1 mov %edx,%ecx 2f: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 31: 31 c0 xor %eax,%eax 33: 0f 01 ca clac 36: c3 retq 37: 8d 0c ca lea (%rdx,%rcx,8),%ecx 3a: 89 ca mov %ecx,%edx 3c: eb 20 jmp 0x5e 3e: 0f .byte 0xf 3f: 01 .byte 0x1