------------[ cut here ]------------ kernel BUG at mm/memory.c:2117! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 0 PID: 3130 Comm: syz-executor.0 Not tainted 5.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:vmf_insert_pfn_prot+0xa7/0x140 mm/memory.c:2117 Code: ff 48 83 c4 08 5d 41 5c 41 5d c3 48 83 c4 08 b8 02 00 00 00 5d 41 5c 41 5d c3 0f 0b 0f 0b 48 89 c2 83 e2 28 48 83 fa 20 75 8c <0f> 0b 48 b8 ff ff ff ff ff ff 0f 00 4c 21 e8 49 39 c5 0f 85 7b ff RSP: 0018:ffffc90001933b20 EFLAGS: 00010246 RAX: 0000000000040474 RBX: 0000000000000000 RCX: 000000000000002d RDX: 0000000000000020 RSI: 0000000020ffd000 RDI: ffff88810bf2b900 RBP: ffff88810bf2b900 R08: ffffffff819cd6f0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000020ffd000 R13: 000000000010e869 R14: ffff88810bf2b900 R15: ffff88810993a228 FS: 00007f714f78d6c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020ffd000 CR3: 000000010e87e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_gem_shmem_fault+0x85/0xb0 drivers/gpu/drm/drm_gem_shmem_helper.c:564 __do_fault+0x2b/0xf0 mm/memory.c:3857 do_read_fault mm/memory.c:4172 [inline] do_fault mm/memory.c:4300 [inline] handle_pte_fault mm/memory.c:4558 [inline] __handle_mm_fault+0x10c5/0x1b70 mm/memory.c:4693 handle_mm_fault+0xff/0x2d0 mm/memory.c:4791 do_user_addr_fault arch/x86/mm/fault.c:1390 [inline] handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x1c9/0x830 arch/x86/mm/fault.c:1531 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:206 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 83 f8 RSP: 0018:ffffc90001933db0 EFLAGS: 00050206 RAX: 0000000020ffe000 RBX: 0000000020ffd000 RCX: 0000000000001000 RDX: 0000000000001000 RSI: 0000000020ffd000 RDI: ffff8881027d9000 RBP: 0000000000001000 R08: 0000000000001000 R09: ffff8881027d9000 R10: 0000000000080000 R11: 0000000020ffd000 R12: 0000000000001000 R13: ffff8881027d9000 R14: ffff888107dba600 R15: 000000007f002000 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+0x4e/0x80 lib/usercopy.c:16 copy_from_user include/linux/uaccess.h:192 [inline] snd_rawmidi_kernel_write1+0x140/0x230 sound/core/rawmidi.c:1476 snd_rawmidi_write+0x95/0x350 sound/core/rawmidi.c:1545 vfs_write+0xbc/0x2d0 fs/read_write.c:603 ksys_write+0xae/0xe0 fs/read_write.c:658 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f714fc0aae9 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:00007f714f78d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f714fd29f80 RCX: 00007f714fc0aae9 RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007f714fc5647a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f714fd29f80 R15: 00007ffc4d5908f8 Modules linked in: ---[ end trace 60bb48dcfddf1d11 ]--- RIP: 0010:vmf_insert_pfn_prot+0xa7/0x140 mm/memory.c:2117 Code: ff 48 83 c4 08 5d 41 5c 41 5d c3 48 83 c4 08 b8 02 00 00 00 5d 41 5c 41 5d c3 0f 0b 0f 0b 48 89 c2 83 e2 28 48 83 fa 20 75 8c <0f> 0b 48 b8 ff ff ff ff ff ff 0f 00 4c 21 e8 49 39 c5 0f 85 7b ff RSP: 0018:ffffc90001933b20 EFLAGS: 00010246 RAX: 0000000000040474 RBX: 0000000000000000 RCX: 000000000000002d RDX: 0000000000000020 RSI: 0000000020ffd000 RDI: ffff88810bf2b900 RBP: ffff88810bf2b900 R08: ffffffff819cd6f0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000020ffd000 R13: 000000000010e869 R14: ffff88810bf2b900 R15: ffff88810993a228 FS: 00007f714f78d6c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020ffd000 CR3: 000000010e87e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 d1 mov %edx,%ecx 2: c1 e9 03 shr $0x3,%ecx 5: 83 e2 07 and $0x7,%edx 8: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) b: 89 d1 mov %edx,%ecx d: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) f: 31 c0 xor %eax,%eax 11: 0f 01 ca clac 14: c3 ret 15: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1c: 0f 01 cb stac 1f: 83 fa 40 cmp $0x40,%edx 22: 0f 82 70 ff ff ff jb 0xffffff98 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: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 39: 00 00 00 3c: 89 d1 mov %edx,%ecx 3e: 83 .byte 0x83 3f: f8 clc