------------[ cut here ]------------ kernel BUG at mm/memory.c:2163! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 17729 Comm: syz-executor.3 Not tainted 6.3.0-rc5-syzkaller-00005-g148341f0a2f5 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2163 Code: 0f 0b e8 c7 58 c2 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 23 55 c2 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 a4 58 c2 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 93 58 c2 ff 4d 21 ee 4c 89 RSP: 0018:ffffc900206bf5f0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 1ffff920040d7ec0 RCX: ffffc900032b1000 RDX: 0000000000040000 RSI: ffffffff81c07f1c RDI: 0000000000000007 RBP: ffff888043af4460 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000006 R12: 0000000020ffe000 R13: 000000000001acda R14: 000000000c140472 R15: 0000000000000020 FS: 0000000000000000(0000) GS:ffff88802ca80000(0063) knlGS:00000000f7f0bb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000c0081036f8 CR3: 000000001a104000 CR4: 0000000000150ee0 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:fault_in_readable+0x179/0x290 mm/gup.c:1863 Code: 36 c5 ff 49 39 dd 0f 84 06 01 00 00 45 31 f6 eb 11 e8 2b 36 c5 ff 48 81 c3 00 10 00 00 4c 39 eb 74 1d e8 1a 36 c5 ff 45 89 f7 <8a> 03 31 ff 44 89 fe 88 44 24 28 e8 57 32 c5 ff 45 85 ff 74 d2 e8 RSP: 0018:ffffc900206bfa18 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000020ffe000 RCX: ffffc900032b1000 RDX: 0000000000040000 RSI: ffffffff81bda1a6 RDI: 0000000000000005 RBP: 0000000020ffd340 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000094001 R12: 0000000000001000 R13: 0000000020fff000 R14: 0000000000000000 R15: 0000000000000000 fault_in_iov_iter_readable+0x252/0x2c0 lib/iov_iter.c:350 generic_perform_write+0x1ae/0x570 mm/filemap.c:3916 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:1851 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9ed/0xe10 fs/read_write.c:584 ksys_write+0x12b/0x250 fs/read_write.c:637 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f10579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f0b5cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000020000340 RDX: 000000000208e24b RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2163 Code: 0f 0b e8 c7 58 c2 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 23 55 c2 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 a4 58 c2 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 93 58 c2 ff 4d 21 ee 4c 89 RSP: 0018:ffffc900206bf5f0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 1ffff920040d7ec0 RCX: ffffc900032b1000 RDX: 0000000000040000 RSI: ffffffff81c07f1c RDI: 0000000000000007 RBP: ffff888043af4460 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 0000000000000006 R12: 0000000020ffe000 R13: 000000000001acda R14: 000000000c140472 R15: 0000000000000020 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f7f0bb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000c000d04000 CR3: 000000001a104000 CR4: 0000000000150ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 36 c5 ff 49 ss (bad) 4: 39 dd cmp %ebx,%ebp 6: 0f 84 06 01 00 00 je 0x112 c: 45 31 f6 xor %r14d,%r14d f: eb 11 jmp 0x22 11: e8 2b 36 c5 ff callq 0xffc53641 16: 48 81 c3 00 10 00 00 add $0x1000,%rbx 1d: 4c 39 eb cmp %r13,%rbx 20: 74 1d je 0x3f 22: e8 1a 36 c5 ff callq 0xffc53641 27: 45 89 f7 mov %r14d,%r15d * 2a: 8a 03 mov (%rbx),%al <-- trapping instruction 2c: 31 ff xor %edi,%edi 2e: 44 89 fe mov %r15d,%esi 31: 88 44 24 28 mov %al,0x28(%rsp) 35: e8 57 32 c5 ff callq 0xffc53291 3a: 45 85 ff test %r15d,%r15d 3d: 74 d2 je 0x11 3f: e8 .byte 0xe8