------------[ cut here ]------------ kernel BUG at mm/memory.c:2202! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 22365 Comm: syz-executor.4 Not tainted 6.3.0-syzkaller-13390-g2e1e1337881b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2202 Code: 0f 0b e8 c7 6f c1 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 f3 6b c1 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 a4 6f c1 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 93 6f c1 ff 4d 21 ee 4c 89 RSP: 0018:ffffc9000336f740 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 1ffff9200066deea RCX: ffffc90006221000 RDX: 0000000000040000 RSI: ffffffff81c2d53c RDI: 0000000000000007 RBP: ffff8880173bb400 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 000000000000006b R12: 0000000020ffc000 R13: 000000000007741e R14: 000000000c140473 R15: 0000000000000020 FS: 00007fa9cafe3700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200cc030 CR3: 00000000651f2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: drm_gem_shmem_fault+0x1e5/0x3a0 drivers/gpu/drm/drm_gem_shmem_helper.c:563 __do_fault+0x107/0x600 mm/memory.c:4176 do_read_fault mm/memory.c:4530 [inline] do_fault mm/memory.c:4659 [inline] do_pte_missing mm/memory.c:3647 [inline] handle_pte_fault mm/memory.c:4947 [inline] __handle_mm_fault+0x28bc/0x41c0 mm/memory.c:5089 handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243 do_user_addr_fault+0x51a/0x1210 arch/x86/mm/fault.c:1440 handle_page_fault arch/x86/mm/fault.c:1534 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1590 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:rep_movs_alternative+0x50/0xb0 arch/x86/lib/copy_user_64.S:70 Code: 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 66 0f 1f 44 00 00 <4c> 8b 06 4c 8b 4e 08 4c 8b 56 10 4c 8b 5e 18 4c 89 07 4c 89 4f 08 RSP: 0018:ffffc9000336fb50 EFLAGS: 00050206 RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000001000 RDX: 0000000000000000 RSI: 0000000020ffc000 RDI: ffff888046f40000 RBP: 0000000020ffd000 R08: 0000000000000001 R09: ffff888046f40fff R10: ffffed1008de81ff R11: 0000000000000000 R12: 0000000020ffc000 R13: ffff888046f40000 R14: 0000000000000000 R15: 0000000020ffc000 copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:127 [inline] _copy_from_user+0xc1/0xf0 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:183 [inline] snd_rawmidi_kernel_write1+0x355/0x850 sound/core/rawmidi.c:1547 snd_rawmidi_write+0x277/0xbb0 sound/core/rawmidi.c:1616 vfs_write+0x2ae/0xd50 fs/read_write.c:582 ksys_write+0x1ec/0x250 fs/read_write.c:637 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: 0033:0x7fa9ca28c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa9cafe3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa9ca3abf80 RCX: 00007fa9ca28c169 RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00007fa9ca2e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa9ca4cfb1f R14: 00007fa9cafe3300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2202 Code: 0f 0b e8 c7 6f c1 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 f3 6b c1 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 a4 6f c1 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 93 6f c1 ff 4d 21 ee 4c 89 RSP: 0018:ffffc9000336f740 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 1ffff9200066deea RCX: ffffc90006221000 RDX: 0000000000040000 RSI: ffffffff81c2d53c RDI: 0000000000000007 RBP: ffff8880173bb400 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 000000000000006b R12: 0000000020ffc000 R13: 000000000007741e R14: 000000000c140473 R15: 0000000000000020 FS: 00007fa9cafe3700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2dd26000 CR3: 00000000651f2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 7: 00 8: 66 90 xchg %ax,%ax a: 48 8b 06 mov (%rsi),%rax d: 48 89 07 mov %rax,(%rdi) 10: 48 83 c6 08 add $0x8,%rsi 14: 48 83 c7 08 add $0x8,%rdi 18: 83 e9 08 sub $0x8,%ecx 1b: 74 df je 0xfffffffc 1d: 83 f9 08 cmp $0x8,%ecx 20: 73 e8 jae 0xa 22: eb c9 jmp 0xffffffed 24: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) * 2a: 4c 8b 06 mov (%rsi),%r8 <-- trapping instruction 2d: 4c 8b 4e 08 mov 0x8(%rsi),%r9 31: 4c 8b 56 10 mov 0x10(%rsi),%r10 35: 4c 8b 5e 18 mov 0x18(%rsi),%r11 39: 4c 89 07 mov %r8,(%rdi) 3c: 4c 89 4f 08 mov %r9,0x8(%rdi)