------------[ cut here ]------------ kernel BUG at mm/memory.c:2203! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 26832 Comm: syz-executor.4 Not tainted 6.3.0-rc3-next-20230324-syzkaller #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:2203 Code: 0f 0b e8 07 8c c1 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 33 88 c1 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 e4 8b c1 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 d3 8b c1 ff 4d 21 ee 4c 89 RSP: 0018:ffffc900024ef630 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff9200049dec8 RCX: 0000000000000000 RDX: ffff8880646257c0 RSI: ffffffff81c14a7c RDI: 0000000000000007 RBP: ffff888078b14800 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000005 R12: 0000000020ffc000 R13: 00000000000255c0 R14: 000000000c040475 R15: 0000000000000020 FS: 00007f7355b90700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020ffc000 CR3: 000000009c82c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 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:4163 do_read_fault mm/memory.c:4512 [inline] do_fault mm/memory.c:4641 [inline] do_pte_missing mm/memory.c:3634 [inline] handle_pte_fault mm/memory.c:4929 [inline] __handle_mm_fault+0x278b/0x4030 mm/memory.c:5071 handle_mm_fault+0x2c0/0x9c0 mm/memory.c:5217 do_user_addr_fault+0x53d/0x1240 arch/x86/mm/fault.c:1462 handle_page_fault arch/x86/mm/fault.c:1556 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1612 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:fault_in_readable+0x179/0x290 mm/gup.c:1863 Code: 7b c4 ff 49 39 dd 0f 84 0f 01 00 00 45 31 f6 eb 11 e8 eb 7b c4 ff 48 81 c3 00 10 00 00 4c 39 eb 74 1d e8 da 7b c4 ff 45 89 f7 <8a> 03 31 ff 44 89 fe 88 44 24 28 e8 e7 77 c4 ff 45 85 ff 74 d2 e8 RSP: 0018:ffffc900024efa38 EFLAGS: 00050293 RAX: 0000000000000000 RBX: 0000000020ffc000 RCX: 0000000000000000 RDX: ffff8880646257c0 RSI: ffffffff81be5a86 RDI: 0000000000000005 RBP: 0000000020ffb200 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000094001 R12: 0000000000001000 R13: 0000000020ffd000 R14: 0000000000000000 R15: 0000000000000000 fault_in_iov_iter_readable+0x252/0x2c0 lib/iov_iter.c:216 generic_perform_write+0x1ae/0x570 mm/filemap.c:3911 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:289 ext4_file_write_iter+0xbe0/0x1740 fs/ext4/file.c:710 call_write_iter include/linux/fs.h:1854 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9f6/0xe20 fs/read_write.c:584 ksys_write+0x12b/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: 0033:0x7f7354e8c0f9 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:00007f7355b90168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f7354fabf80 RCX: 00007f7354e8c0f9 RDX: 00000000175d900f RSI: 0000000020000200 RDI: 0000000000000004 RBP: 00007f7354ee7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe1b1ab7cf R14: 00007f7355b90300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2203 Code: 0f 0b e8 07 8c c1 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 33 88 c1 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 e4 8b c1 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 d3 8b c1 ff 4d 21 ee 4c 89 RSP: 0018:ffffc900024ef630 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff9200049dec8 RCX: 0000000000000000 RDX: ffff8880646257c0 RSI: ffffffff81c14a7c RDI: 0000000000000007 RBP: ffff888078b14800 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000005 R12: 0000000020ffc000 R13: 00000000000255c0 R14: 000000000c040475 R15: 0000000000000020 FS: 00007f7355b90700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1138c44000 CR3: 000000009c82c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 49 39 dd cmp %rbx,%r13 3: 0f 84 0f 01 00 00 je 0x118 9: 45 31 f6 xor %r14d,%r14d c: eb 11 jmp 0x1f e: e8 eb 7b c4 ff callq 0xffc47bfe 13: 48 81 c3 00 10 00 00 add $0x1000,%rbx 1a: 4c 39 eb cmp %r13,%rbx 1d: 74 1d je 0x3c 1f: e8 da 7b c4 ff callq 0xffc47bfe 24: 45 89 f7 mov %r14d,%r15d * 27: 8a 03 mov (%rbx),%al <-- trapping instruction 29: 31 ff xor %edi,%edi 2b: 44 89 fe mov %r15d,%esi 2e: 88 44 24 28 mov %al,0x28(%rsp) 32: e8 e7 77 c4 ff callq 0xffc4781e 37: 45 85 ff test %r15d,%r15d 3a: 74 d2 je 0xe 3c: e8 .byte 0xe8