------------[ cut here ]------------ kernel BUG at mm/memory.c:2163! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 26904 Comm: syz-executor.3 Not tainted 6.3.0-rc2-syzkaller-00405-ga3671bd86a97 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2163 Code: 0f 0b e8 27 5b c2 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 83 57 c2 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 04 5b c2 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 f3 5a c2 ff 4d 21 ee 4c 89 RSP: 0018:ffffc90015d27730 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff92002ba4ee8 RCX: 0000000000000000 RDX: ffff88807bef3a80 RSI: ffffffff81c089fc RDI: 0000000000000007 RBP: ffff88802af9b0e0 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000000 R12: 0000000020003000 R13: 000000000001e3d1 R14: 000000000c040474 R15: 0000000000000020 FS: 00007fcc893fe700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6eaa08e270 CR3: 000000007c070000 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:559 __do_fault+0x107/0x600 mm/memory.c:4141 do_read_fault mm/memory.c:4492 [inline] do_fault mm/memory.c:4621 [inline] handle_pte_fault mm/memory.c:4909 [inline] __handle_mm_fault+0x24f3/0x3e60 mm/memory.c:5051 handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5197 do_user_addr_fault+0x475/0x1230 arch/x86/mm/fault.c:1407 handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:166 Code: d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 2c 66 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 0f 01 cb 83 fa 40 72 34 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 06 66 0f 1f 44 00 00 83 f8 12 74 RSP: 0018:ffffc90015d27b58 EFLAGS: 00050206 RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000001000 RDX: 0000000000001000 RSI: 0000000020003000 RDI: ffff88806bef6000 RBP: ffff88806bef6000 R08: 0000000000000001 R09: ffff88806bef6fff R10: ffffed100d7dedff R11: 0000000000000000 R12: 00007fffffffe000 R13: 0000000020003000 R14: dffffc0000000000 R15: 0000000020003000 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+0x13e/0x180 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:161 [inline] snd_rawmidi_kernel_write1+0x355/0x850 sound/core/rawmidi.c:1547 snd_rawmidi_write+0x277/0xbb0 sound/core/rawmidi.c:1616 vfs_write+0x2db/0xe10 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: 0033:0x7fcc8a88c0f9 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:00007fcc893fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fcc8a9abf80 RCX: 00007fcc8a88c0f9 RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00007fcc8a8e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcc8aacfb1f R14: 00007fcc893fe300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2163 Code: 0f 0b e8 27 5b c2 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 83 57 c2 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 04 5b c2 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 f3 5a c2 ff 4d 21 ee 4c 89 RSP: 0018:ffffc90015d27730 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff92002ba4ee8 RCX: 0000000000000000 RDX: ffff88807bef3a80 RSI: ffffffff81c089fc RDI: 0000000000000007 RBP: ffff88802af9b0e0 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000000 R12: 0000000020003000 R13: 000000000001e3d1 R14: 000000000c040474 R15: 0000000000000020 FS: 00007fcc893fe700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6eaa08d300 CR3: 000000007c070000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: d1 f3 shl %ebx 2: a4 movsb %ds:(%rsi),%es:(%rdi) 3: 31 c0 xor %eax,%eax 5: 0f 01 ca clac 8: c3 retq 9: 8d 0c ca lea (%rdx,%rcx,8),%ecx c: 89 ca mov %ecx,%edx e: eb 2c jmp 0x3c 10: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 17: 00 00 00 00 1b: 90 nop 1c: f3 0f 1e fa endbr64 20: 0f 01 cb stac 23: 83 fa 40 cmp $0x40,%edx 26: 72 34 jb 0x5c 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 retq 32: 89 ca mov %ecx,%edx 34: eb 06 jmp 0x3c 36: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 3c: 83 f8 12 cmp $0x12,%eax 3f: 74 .byte 0x74