------------[ cut here ]------------ kernel BUG at mm/memory.c:2218! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3606 Comm: syz-executor205 Not tainted 6.0.0-rc1-syzkaller-00025-g274a2eebf80c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:vmf_insert_pfn_prot+0x40b/0x420 mm/memory.c:2218 Code: 92 c6 31 ff e8 46 d8 c1 ff 84 db 74 2b e8 5d d5 c1 ff e9 87 fd ff ff e8 53 d5 c1 ff 0f 0b e8 4c d5 c1 ff 0f 0b e8 45 d5 c1 ff <0f> 0b e8 ae 9f 70 08 e8 39 d5 c1 ff 0f 0b e8 32 d5 c1 ff 0f 0b 55 RSP: 0018:ffffc900038ef340 EFLAGS: 00010293 RAX: ffffffff81c7c30b RBX: 0000000000000420 RCX: ffff88801c14d880 RDX: 0000000000000000 RSI: 0000000000000420 RDI: 0000000000000420 RBP: ffffc900038ef400 R08: ffffffff81c7bfff R09: ffffffff81c7bfd3 R10: 0000000000000002 R11: ffff88801c14d880 R12: 000000000c140476 R13: ffff888022369738 R14: ffffc900038ef380 R15: 000000000001e079 FS: 000055555672c300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 0000000026d13000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> drm_gem_shmem_fault+0x1db/0x240 drivers/gpu/drm/drm_gem_shmem_helper.c:562 __do_fault+0x139/0x4f0 mm/memory.c:4173 do_read_fault mm/memory.c:4518 [inline] do_fault mm/memory.c:4647 [inline] handle_pte_fault mm/memory.c:4911 [inline] __handle_mm_fault mm/memory.c:5053 [inline] handle_mm_fault+0x2835/0x35c0 mm/memory.c:5151 do_user_addr_fault+0x69b/0xcb0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1488 [inline] exc_page_fault+0x7a/0x120 arch/x86/mm/fault.c:1544 asm_exc_page_fault+0x22/0x30 RIP: 0010:fault_in_readable+0x1ea/0x360 mm/gup.c:1859 Code: 4c 89 eb 4d 01 e6 49 81 e6 00 f0 ff ff 4d 39 ee 0f 82 e4 00 00 00 e8 d5 2f c3 ff 0f 1f 44 00 00 4c 39 f3 74 46 e8 c6 2f c3 ff <44> 8a 23 e8 be 2f c3 ff 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 RSP: 0018:ffffc900038ef8a0 EFLAGS: 00050293 RAX: ffffffff81c6688a RBX: 0000000020002000 RCX: ffff88801c14d880 RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000 RBP: ffffc900038ef958 R08: ffffffff81c667fb R09: ffffffff84331424 R10: 0000000000000002 R11: ffff88801c14d880 R12: 0000000000001000 R13: 0000000020001040 R14: 0000000020003000 R15: 1ffff9200071df1c fault_in_iov_iter_readable+0xe6/0x2a0 lib/iov_iter.c:353 generic_perform_write+0x216/0x610 mm/filemap.c:3728 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:270 ext4_file_write_iter+0xabb/0x1ae0 call_write_iter include/linux/fs.h:2187 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7b5/0xbb0 fs/read_write.c:578 ksys_write+0x19b/0x2c0 fs/read_write.c:631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9d90d77b89 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:00007ffcf31db8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9d90d77b89 RDX: 000000000000fea7 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f9d90d3bd30 R08: 00000000000a9000 R09: 0000000000000000 R10: 00000000000a9000 R11: 0000000000000246 R12: 00007f9d90d3bdc0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x40b/0x420 mm/memory.c:2218 Code: 92 c6 31 ff e8 46 d8 c1 ff 84 db 74 2b e8 5d d5 c1 ff e9 87 fd ff ff e8 53 d5 c1 ff 0f 0b e8 4c d5 c1 ff 0f 0b e8 45 d5 c1 ff <0f> 0b e8 ae 9f 70 08 e8 39 d5 c1 ff 0f 0b e8 32 d5 c1 ff 0f 0b 55 RSP: 0018:ffffc900038ef340 EFLAGS: 00010293 RAX: ffffffff81c7c30b RBX: 0000000000000420 RCX: ffff88801c14d880 RDX: 0000000000000000 RSI: 0000000000000420 RDI: 0000000000000420 RBP: ffffc900038ef400 R08: ffffffff81c7bfff R09: ffffffff81c7bfd3 R10: 0000000000000002 R11: ffff88801c14d880 R12: 000000000c140476 R13: ffff888022369738 R14: ffffc900038ef380 R15: 000000000001e079 FS: 000055555672c300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 0000000026d13000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4c 89 eb mov %r13,%rbx 3: 4d 01 e6 add %r12,%r14 6: 49 81 e6 00 f0 ff ff and $0xfffffffffffff000,%r14 d: 4d 39 ee cmp %r13,%r14 10: 0f 82 e4 00 00 00 jb 0xfa 16: e8 d5 2f c3 ff callq 0xffc32ff0 1b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 20: 4c 39 f3 cmp %r14,%rbx 23: 74 46 je 0x6b 25: e8 c6 2f c3 ff callq 0xffc32ff0 * 2a: 44 8a 23 mov (%rbx),%r12b <-- trapping instruction 2d: e8 be 2f c3 ff callq 0xffc32ff0 32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 39: fc ff df 3c: 41 rex.B 3d: 0f .byte 0xf 3e: b6 04 mov $0x4,%dh