kernel BUG at mm/memory.c:2185! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5051 Comm: syz-executor277 Not tainted 6.2.0-rc5-syzkaller-00199-g5af6ce704936 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2185 Code: 0f 0b e8 07 e3 c5 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 c3 df c5 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 e4 e2 c5 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 d3 e2 c5 ff 4d 21 ee 4c 89 RSP: 0018:ffffc90002fcf9d0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff920005f9f3c RCX: 0000000000000000 RDX: ffff8880724f6180 RSI: ffffffff81baa05c RDI: 0000000000000007 RBP: ffff8880222df7e0 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000005 R12: 0000000020000000 R13: 000000000001c4e8 R14: 000000000c040471 R15: 0000000000000020 FS: 000055555571c3c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 00000000755cb000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_gem_shmem_fault+0x1e1/0x290 drivers/gpu/drm/drm_gem_shmem_helper.c:562 __do_fault+0x107/0x600 mm/memory.c:4163 do_read_fault mm/memory.c:4514 [inline] do_fault mm/memory.c:4643 [inline] handle_pte_fault mm/memory.c:4931 [inline] __handle_mm_fault+0x22f2/0x3c90 mm/memory.c:5073 handle_mm_fault+0x1b6/0x850 mm/memory.c:5219 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_short_string+0xa/0x40 arch/x86/lib/copy_user_64.S:232 Code: 83 f8 12 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 0f 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 RSP: 0018:ffffc90002fcfdf0 EFLAGS: 00050206 RAX: 0000000000000001 RBX: 0000000000000018 RCX: 0000000000000003 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffc90002fcfe58 RBP: ffffc90002fcfe58 R08: 0000000000000001 R09: ffffc90002fcfe6f R10: fffff520005f9fcd R11: 0000000000094001 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+0x13b/0x170 lib/usercopy.c:16 copy_from_user include/linux/uaccess.h:161 [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+0x1b/0x30 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+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd77dbec559 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:00007ffe5375c2a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe5375c2b8 RCX: 00007fd77dbec559 RDX: 0000000020000000 RSI: 00000000c0189378 RDI: 0000000000000003 RBP: 00007ffe5375c2b0 R08: 00007ffe5375c2b0 R09: 00007fd77dbaf1c0 R10: 00007ffe5375c2b0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2185 Code: 0f 0b e8 07 e3 c5 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 c3 df c5 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 e4 e2 c5 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 d3 e2 c5 ff 4d 21 ee 4c 89 RSP: 0018:ffffc90002fcf9d0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff920005f9f3c RCX: 0000000000000000 RDX: ffff8880724f6180 RSI: ffffffff81baa05c RDI: 0000000000000007 RBP: ffff8880222df7e0 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000005 R12: 0000000020000000 R13: 000000000001c4e8 R14: 000000000c040471 R15: 0000000000000020 FS: 000055555571c3c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 00000000755cb000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 83 f8 12 cmp $0x12,%eax 3: 74 0a je 0xf 5: 89 d1 mov %edx,%ecx 7: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 9: 89 c8 mov %ecx,%eax b: 0f 01 ca clac e: c3 retq f: 89 d0 mov %edx,%eax 11: 0f 01 ca clac 14: c3 retq 15: 01 ca add %ecx,%edx 17: eb e7 jmp 0x0 19: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 20: 89 d1 mov %edx,%ecx 22: 83 e2 07 and $0x7,%edx 25: c1 e9 03 shr $0x3,%ecx 28: 74 12 je 0x3c * 2a: 4c 8b 06 mov (%rsi),%r8 <-- trapping instruction 2d: 4c 89 07 mov %r8,(%rdi) 30: 48 8d 76 08 lea 0x8(%rsi),%rsi 34: 48 8d 7f 08 lea 0x8(%rdi),%rdi 38: ff c9 dec %ecx 3a: 75 ee jne 0x2a 3c: 21 d2 and %edx,%edx 3e: 74 10 je 0x50