------------[ cut here ]------------ kernel BUG at mm/memory.c:2237! invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 PID: 19163 Comm: syz-executor.4 Not tainted 6.8.0-syzkaller-08073-g480e035fc4c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:vmf_insert_pfn_prot+0x2be/0x2d0 mm/memory.c:2237 Code: 41 5f 5d c3 cc cc cc cc e8 0f b3 b4 ff b8 02 00 00 00 eb c0 e8 03 b3 b4 ff 90 0f 0b e8 fb b2 b4 ff 90 0f 0b e8 f3 b2 b4 ff 90 <0f> 0b e8 5b f0 93 09 e8 e6 b2 b4 ff 90 0f 0b 0f 1f 00 90 90 90 90 RSP: 0018:ffffc9000a74f2a0 EFLAGS: 00010246 RAX: ffffffff81e0425d RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc90009f42000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc9000a74f360 R08: ffffffff81e040a1 R09: ffffffff81e04075 R10: 0000000000000002 R11: ffff888021f5da00 R12: ffffc9000a74f2e0 R13: ffff88801bedd400 R14: 1ffff920014e9e58 R15: 000000000c140476 FS: 00007fcd053546c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31326000 CR3: 00000000617d4000 CR4: 00000000003526f0 Call Trace: drm_gem_shmem_fault+0x201/0x3a0 drivers/gpu/drm/drm_gem_shmem_helper.c:531 __do_fault+0x135/0x460 mm/memory.c:4396 do_read_fault mm/memory.c:4758 [inline] do_fault mm/memory.c:4888 [inline] do_pte_missing mm/memory.c:3745 [inline] handle_pte_fault mm/memory.c:5164 [inline] __handle_mm_fault+0x49e6/0x72d0 mm/memory.c:5305 handle_mm_fault+0x3c2/0x8a0 mm/memory.c:5470 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x2a8/0x890 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:fault_in_readable+0x165/0x2b0 mm/gup.c:1997 Code: b6 ff 4c 8d b3 ff 0f 00 00 48 89 d8 4d 01 e6 49 81 e6 00 f0 ff ff 49 39 c6 72 6b e8 c5 99 b6 ff 4c 39 f3 74 6e 4c 89 64 24 10 <44> 8a 23 43 0f b6 04 2f 84 c0 75 18 44 88 64 24 40 48 81 c3 00 10 RSP: 0018:ffffc9000a74f9e0 EFLAGS: 00050287 RAX: ffffffff81de5b8b RBX: 0000000020ffc000 RCX: 0000000000040000 RDX: ffffc90009f42000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc9000a74fa98 R08: ffffffff81de5b28 R09: ffffffff84a31e49 R10: 0000000000000002 R11: ffff888021f5da00 R12: 0000000000001000 R13: dffffc0000000000 R14: 0000000020ffd000 R15: 1ffff920014e9f44 fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94 generic_perform_write+0x220/0x640 mm/filemap.c:3920 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2926 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa84/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fcd0467de69 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:00007fcd053540c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fcd047abf80 RCX: 00007fcd0467de69 RDX: 000000000208e24b RSI: 0000000020000600 RDI: 0000000000000007 RBP: 00007fcd046ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fcd047abf80 R15: 00007fcd048cfa48 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x2be/0x2d0 mm/memory.c:2237 Code: 41 5f 5d c3 cc cc cc cc e8 0f b3 b4 ff b8 02 00 00 00 eb c0 e8 03 b3 b4 ff 90 0f 0b e8 fb b2 b4 ff 90 0f 0b e8 f3 b2 b4 ff 90 <0f> 0b e8 5b f0 93 09 e8 e6 b2 b4 ff 90 0f 0b 0f 1f 00 90 90 90 90 RSP: 0018:ffffc9000a74f2a0 EFLAGS: 00010246 RAX: ffffffff81e0425d RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc90009f42000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc9000a74f360 R08: ffffffff81e040a1 R09: ffffffff81e04075 R10: 0000000000000002 R11: ffff888021f5da00 R12: ffffc9000a74f2e0 R13: ffff88801bedd400 R14: 1ffff920014e9e58 R15: 000000000c140476 FS: 00007fcd053546c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200049c0 CR3: 00000000617d4000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: b6 ff mov $0xff,%dh 2: 4c 8d b3 ff 0f 00 00 lea 0xfff(%rbx),%r14 9: 48 89 d8 mov %rbx,%rax c: 4d 01 e6 add %r12,%r14 f: 49 81 e6 00 f0 ff ff and $0xfffffffffffff000,%r14 16: 49 39 c6 cmp %rax,%r14 19: 72 6b jb 0x86 1b: e8 c5 99 b6 ff call 0xffb699e5 20: 4c 39 f3 cmp %r14,%rbx 23: 74 6e je 0x93 25: 4c 89 64 24 10 mov %r12,0x10(%rsp) * 2a: 44 8a 23 mov (%rbx),%r12b <-- trapping instruction 2d: 43 0f b6 04 2f movzbl (%r15,%r13,1),%eax 32: 84 c0 test %al,%al 34: 75 18 jne 0x4e 36: 44 88 64 24 40 mov %r12b,0x40(%rsp) 3b: 48 rex.W 3c: 81 .byte 0x81 3d: c3 ret 3e: 00 10 add %dl,(%rax)