------------[ cut here ]------------ kernel BUG at mm/memory.c:2230! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 15253 Comm: X Not tainted 6.1.83-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:vmf_insert_pfn_prot+0x2b3/0x2d0 mm/memory.c:2230 Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 17 0c be ff b8 02 00 00 00 eb c4 e8 0b 0c be ff 0f 0b e8 04 0c be ff 0f 0b e8 fd 0b be ff <0f> 0b e8 d6 6e bd 08 e8 f1 0b be ff 0f 0b 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc9000c26f6e0 EFLAGS: 00010283 RAX: ffffffff81cc78f3 RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc90003b01000 RSI: 0000000000001b91 RDI: 0000000000001b92 RBP: ffffc9000c26f7a0 R08: ffffffff81cc773d R09: ffffffff81cc7711 R10: 0000000000000002 R11: ffff8880227f9dc0 R12: ffffc9000c26f720 R13: ffff8880226ab1b0 R14: 1ffff9200184dee0 R15: 000000000c040474 FS: 00007f05ffa076c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000140 CR3: 000000005ec34000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_gem_shmem_fault+0x1d9/0x230 drivers/gpu/drm/drm_gem_shmem_helper.c:562 __do_fault+0x136/0x4f0 mm/memory.c:4261 do_read_fault mm/memory.c:4612 [inline] do_fault mm/memory.c:4741 [inline] handle_pte_fault mm/memory.c:5013 [inline] __handle_mm_fault mm/memory.c:5155 [inline] handle_mm_fault+0x3412/0x5340 mm/memory.c:5276 do_user_addr_fault arch/x86/mm/fault.c:1371 [inline] handle_page_fault arch/x86/mm/fault.c:1462 [inline] exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1518 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166 Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffc9000c26fc10 EFLAGS: 00050206 RAX: ffffffff8437f001 RBX: 00007fffffffef60 RCX: 00000000000000a0 RDX: 00000000000000a0 RSI: 0000000020000140 RDI: ffffc9000c26fcb0 RBP: ffffc9000c26fee8 R08: dffffc0000000000 R09: fffff5200184dfaa R10: 0000000000000002 R11: dffffc0000000001 R12: 00000000000000a0 R13: 1ffff9200184df8c R14: ffffc9000c26fcb0 R15: 0000000020000140 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+0xf3/0x170 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:161 [inline] do_fb_ioctl+0x359/0x850 drivers/video/fbdev/core/fbmem.c:1156 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f05fec7dda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f05ffa070c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f05fedabf80 RCX: 00007f05fec7dda9 RDX: 0000000020000140 RSI: 0000000000004606 RDI: 0000000000000003 RBP: 00007f05fecca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f05fedabf80 R15: 00007ffed10d3368 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x2b3/0x2d0 mm/memory.c:2230 Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 17 0c be ff b8 02 00 00 00 eb c4 e8 0b 0c be ff 0f 0b e8 04 0c be ff 0f 0b e8 fd 0b be ff <0f> 0b e8 d6 6e bd 08 e8 f1 0b be ff 0f 0b 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc9000c26f6e0 EFLAGS: 00010283 RAX: ffffffff81cc78f3 RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc90003b01000 RSI: 0000000000001b91 RDI: 0000000000001b92 RBP: ffffc9000c26f7a0 R08: ffffffff81cc773d R09: ffffffff81cc7711 R10: 0000000000000002 R11: ffff8880227f9dc0 R12: ffffc9000c26f720 R13: ffff8880226ab1b0 R14: 1ffff9200184dee0 R15: 000000000c040474 FS: 00007f05ffa076c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5cba404f78 CR3: 000000005ec34000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ff c9 dec %ecx 2: 75 f2 jne 0xfffffff6 4: 89 d1 mov %edx,%ecx 6: c1 e9 03 shr $0x3,%ecx 9: 83 e2 07 and $0x7,%edx c: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) f: 89 d1 mov %edx,%ecx 11: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 13: 31 c0 xor %eax,%eax 15: 0f 01 ca clac 18: c3 ret 19: 8d 0c ca lea (%rdx,%rcx,8),%ecx 1c: 89 ca mov %ecx,%edx 1e: eb 20 jmp 0x40 20: 0f 01 cb stac 23: 83 fa 40 cmp $0x40,%edx 26: 72 38 jb 0x60 28: 89 d1 mov %edx,%ecx * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 31 c0 xor %eax,%eax 2e: 0f 01 ca clac 31: c3 ret 32: 89 ca mov %ecx,%edx 34: eb 0a jmp 0x40 36: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 3d: 00 00 00