------------[ cut here ]------------ kernel BUG at mm/memory.c:2181! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3039 Comm: syz-executor.0 Not tainted 6.2.0-rc8-syzkaller-00127-gdbeed98d89ea #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 RIP: 0010:vmf_insert_pfn_prot+0x42c/0x450 mm/memory.c:2181 Code: ff 89 de e8 06 ec bf ff 45 84 e4 74 2b e8 6c e9 bf ff e9 54 fd ff ff e8 62 e9 bf ff 0f 0b e8 5b e9 bf ff 0f 0b e8 54 e9 bf ff <0f> 0b e8 3d 74 da 08 e8 48 e9 bf ff 0f 0b e8 41 e9 bf ff 0f 0b 66 RSP: 0018:ffffc900166b7320 EFLAGS: 00010287 RAX: ffffffff81cbea6c RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc9000e662000 RSI: 000000000001b31c RDI: 000000000001b31d RBP: ffffc900166b73e0 R08: ffffffff81cbe744 R09: ffffffff81cbe718 R10: 0000000000000002 R11: ffff88801dad3a80 R12: 000000000c040471 R13: ffff888020b7d540 R14: ffffc900166b7360 R15: 000000000001ef76 FS: 00007f593886f700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 0000000022177000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_gem_shmem_fault+0x1dd/0x240 drivers/gpu/drm/drm_gem_shmem_helper.c:562 __do_fault+0x136/0x500 mm/memory.c:4166 do_read_fault mm/memory.c:4517 [inline] do_fault mm/memory.c:4646 [inline] handle_pte_fault mm/memory.c:4934 [inline] __handle_mm_fault mm/memory.c:5076 [inline] handle_mm_fault+0x3326/0x51e0 mm/memory.c:5222 do_user_addr_fault arch/x86/mm/fault.c:1428 [inline] handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x673/0x880 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:fault_in_readable+0x1cc/0x350 mm/gup.c:1834 Code: 24 08 4c 8d b0 ff 0f 00 00 48 89 c3 4d 01 e6 49 81 e6 00 f0 ff ff 49 39 c6 72 70 e8 4e 8b c1 ff 4c 39 f3 74 73 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:ffffc900166b7880 EFLAGS: 00050287 RAX: ffffffff81ca4872 RBX: 0000000020078000 RCX: 0000000000040000 RDX: ffffc9000e662000 RSI: 0000000000019e0b RDI: 0000000000019e0c RBP: ffffc900166b7938 R08: ffffffff81ca480a R09: ffffffff84374c09 R10: 0000000000000002 R11: ffff88801dad3a80 R12: 0000000000001000 R13: dffffc0000000000 R14: 0000000020079000 R15: 1ffff92002cd6f18 fault_in_iov_iter_readable+0xdf/0x280 lib/iov_iter.c:356 generic_perform_write+0x20b/0x5e0 mm/filemap.c:3762 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285 ext4_file_write_iter+0x1d6/0x1910 call_write_iter include/linux/fs.h:2189 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7b2/0xbb0 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5937a8c0f9 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:00007f593886f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f5937babf80 RCX: 00007f5937a8c0f9 RDX: 000000006db6e571 RSI: 0000000020000400 RDI: 0000000000000005 RBP: 00007f5937ae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9b0dd9cf R14: 00007f593886f300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x42c/0x450 mm/memory.c:2181 Code: ff 89 de e8 06 ec bf ff 45 84 e4 74 2b e8 6c e9 bf ff e9 54 fd ff ff e8 62 e9 bf ff 0f 0b e8 5b e9 bf ff 0f 0b e8 54 e9 bf ff <0f> 0b e8 3d 74 da 08 e8 48 e9 bf ff 0f 0b e8 41 e9 bf ff 0f 0b 66 RSP: 0018:ffffc900166b7320 EFLAGS: 00010287 RAX: ffffffff81cbea6c RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc9000e662000 RSI: 000000000001b31c RDI: 000000000001b31d RBP: ffffc900166b73e0 R08: ffffffff81cbe744 R09: ffffffff81cbe718 R10: 0000000000000002 R11: ffff88801dad3a80 R12: 000000000c040471 R13: ffff888020b7d540 R14: ffffc900166b7360 R15: 000000000001ef76 FS: 00007f593886f700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fadb23ad988 CR3: 0000000022177000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 24 08 and $0x8,%al 2: 4c 8d b0 ff 0f 00 00 lea 0xfff(%rax),%r14 9: 48 89 c3 mov %rax,%rbx 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 70 jb 0x8b 1b: e8 4e 8b c1 ff callq 0xffc18b6e 20: 4c 39 f3 cmp %r14,%rbx 23: 74 73 je 0x98 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 retq 3e: 00 10 add %dl,(%rax)