------------[ cut here ]------------ kernel BUG at mm/memory.c:2163! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 19883 Comm: syz-executor.2 Not tainted 6.3.0-rc5-syzkaller-00153-gaa318c48808c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 RIP: 0010:vmf_insert_pfn_prot+0x42c/0x450 mm/memory.c:2163 Code: ff 89 de e8 56 3d bf ff 45 84 e4 74 2b e8 bc 3a bf ff e9 54 fd ff ff e8 b2 3a bf ff 0f 0b e8 ab 3a bf ff 0f 0b e8 a4 3a bf ff <0f> 0b e8 8d f6 d2 08 e8 98 3a bf ff 0f 0b e8 91 3a bf ff 0f 0b 66 RSP: 0018:ffffc9000a047900 EFLAGS: 00010287 RAX: ffffffff81cb27dc RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc90010186000 RSI: 000000000000077d RDI: 000000000000077e RBP: ffffc9000a0479c0 R08: ffffffff81cb24b4 R09: ffffffff81cb2488 R10: 0000000000000002 R11: ffff88801eea3a80 R12: 000000000c040471 R13: ffff88802ba1b2a0 R14: ffffc9000a047940 R15: 000000000001d771 FS: 00007f3b42d9b700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 000000002838f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> drm_gem_shmem_fault+0x1dd/0x240 drivers/gpu/drm/drm_gem_shmem_helper.c:559 __do_fault+0x136/0x500 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 mm/memory.c:5051 [inline] handle_mm_fault+0x3357/0x51c0 mm/memory.c:5197 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline] RIP: 0010:strncpy_from_user+0x15d/0x370 lib/strncpy_from_user.c:139 Code: 21 fd 48 83 fd 07 0f 86 af 00 00 00 4c 89 64 24 08 4c 89 7c 24 10 48 c7 44 24 18 f8 ff ff ff 45 31 ed 4d 89 f4 48 8b 44 24 08 <4e> 8b 3c 28 48 b8 ff fe fe fe fe fe fe fe 49 8d 1c 07 4d 89 fe 49 RSP: 0018:ffffc9000a047e60 EFLAGS: 00050246 RAX: 0000000020000000 RBX: 00007fffffffe020 RCX: ffff88801eea3a80 RDX: ffffc90010186000 RSI: 0000000000000fe0 RDI: 0000000000000007 RBP: 0000000000000fe0 R08: ffffffff8468a075 R09: fffff9400015ff41 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88802bfea220 R13: 0000000000000000 R14: ffff88802bfea220 R15: 0000000000000fe0 getname_flags+0xf9/0x4e0 fs/namei.c:151 getname fs/namei.c:219 [inline] __do_sys_mkdir fs/namei.c:4081 [inline] __se_sys_mkdir fs/namei.c:4079 [inline] __x64_sys_mkdir+0x5f/0x80 fs/namei.c:4079 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: 0033:0x7f3b4208c169 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:00007f3b42d9b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f3b421abf80 RCX: 00007f3b4208c169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f3b420e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd420c601f R14: 00007f3b42d9b300 R15: 0000000000022000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x42c/0x450 mm/memory.c:2163 Code: ff 89 de e8 56 3d bf ff 45 84 e4 74 2b e8 bc 3a bf ff e9 54 fd ff ff e8 b2 3a bf ff 0f 0b e8 ab 3a bf ff 0f 0b e8 a4 3a bf ff <0f> 0b e8 8d f6 d2 08 e8 98 3a bf ff 0f 0b e8 91 3a bf ff 0f 0b 66 RSP: 0018:ffffc9000a047900 EFLAGS: 00010287 RAX: ffffffff81cb27dc RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc90010186000 RSI: 000000000000077d RDI: 000000000000077e RBP: ffffc9000a0479c0 R08: ffffffff81cb24b4 R09: ffffffff81cb2488 R10: 0000000000000002 R11: ffff88801eea3a80 R12: 000000000c040471 R13: ffff88802ba1b2a0 R14: ffffc9000a047940 R15: 000000000001d771 FS: 00007f3b42d9b700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff2096dee8 CR3: 000000002838f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 21 fd and %edi,%ebp 2: 48 83 fd 07 cmp $0x7,%rbp 6: 0f 86 af 00 00 00 jbe 0xbb c: 4c 89 64 24 08 mov %r12,0x8(%rsp) 11: 4c 89 7c 24 10 mov %r15,0x10(%rsp) 16: 48 c7 44 24 18 f8 ff movq $0xfffffffffffffff8,0x18(%rsp) 1d: ff ff 1f: 45 31 ed xor %r13d,%r13d 22: 4d 89 f4 mov %r14,%r12 25: 48 8b 44 24 08 mov 0x8(%rsp),%rax * 2a: 4e 8b 3c 28 mov (%rax,%r13,1),%r15 <-- trapping instruction 2e: 48 b8 ff fe fe fe fe movabs $0xfefefefefefefeff,%rax 35: fe fe fe 38: 49 8d 1c 07 lea (%r15,%rax,1),%rbx 3c: 4d 89 fe mov %r15,%r14 3f: 49 rex.WB