------------[ cut here ]------------ kernel BUG at mm/memory.c:2163! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 14253 Comm: syz-executor.1 Not tainted 6.3.0-rc6-syzkaller-00168-g95abc817ab3a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2163 Code: 0f 0b e8 d7 57 c2 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 33 54 c2 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 b4 57 c2 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 a3 57 c2 ff 4d 21 ee 4c 89 RSP: 0018:ffffc90004d4f8e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff920009a9f1e RCX: 0000000000000000 RDX: ffff88802a593a80 RSI: ffffffff81c093ac RDI: 0000000000000007 RBP: ffff88802711a1c0 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 000000000000005d R12: 0000000020000000 R13: 000000000001d158 R14: 000000000ca40471 R15: 0000000000000020 FS: 00007f7f731c1700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556605708 CR3: 00000000770f4000 CR4: 00000000003506e0 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:4155 do_read_fault mm/memory.c:4506 [inline] do_fault mm/memory.c:4635 [inline] handle_pte_fault mm/memory.c:4923 [inline] __handle_mm_fault+0x24f3/0x3e60 mm/memory.c:5065 handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5211 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:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline] RIP: 0010:strncpy_from_user+0x1c1/0x3c0 lib/strncpy_from_user.c:139 Code: ed 08 4d 89 74 1d 00 bf 07 00 00 00 48 83 c3 08 48 89 ee e8 a1 36 44 fd 48 83 fd 07 0f 86 c0 01 00 00 e8 22 3a 44 fd 45 31 ff <49> 8b 04 1c 31 ff 44 89 fe 49 89 c6 e8 5e 36 44 fd 45 85 ff 0f 84 RSP: 0018:ffffc90004d4fd08 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88802a593a80 RSI: ffffffff843eb13e RDI: 0000000000000007 RBP: 0000000000000fe0 R08: 0000000000000007 R09: 0000000000000007 R10: 0000000000000fe0 R11: 0000000000000000 R12: 0000000020000000 R13: ffff88802de05520 R14: ffff88802de05520 R15: 0000000000000000 getname_flags.part.0+0x95/0x4f0 fs/namei.c:151 getname_flags include/linux/audit.h:321 [inline] getname+0x92/0xd0 fs/namei.c:219 do_sys_openat2+0xf5/0x4c0 fs/open.c:1342 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1375 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: 0033:0x7f7f7248c169 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:00007f7f731c1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f7f725abf80 RCX: 00007f7f7248c169 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007f7f724e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7f726cfb1f R14: 00007f7f731c1300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x24c/0x460 mm/memory.c:2163 Code: 0f 0b e8 d7 57 c2 ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 33 54 c2 ff 49 83 ff 20 0f 85 a5 fe ff ff e8 b4 57 c2 ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 a3 57 c2 ff 4d 21 ee 4c 89 RSP: 0018:ffffc90004d4f8e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff920009a9f1e RCX: 0000000000000000 RDX: ffff88802a593a80 RSI: ffffffff81c093ac RDI: 0000000000000007 RBP: ffff88802711a1c0 R08: 0000000000000007 R09: 0000000000000020 R10: 0000000000000020 R11: 000000000000005d R12: 0000000020000000 R13: 000000000001d158 R14: 000000000ca40471 R15: 0000000000000020 FS: 00007f7f731c1700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c01254b000 CR3: 00000000770f4000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ed in (%dx),%eax 1: 08 4d 89 or %cl,-0x77(%rbp) 4: 74 1d je 0x23 6: 00 bf 07 00 00 00 add %bh,0x7(%rdi) c: 48 83 c3 08 add $0x8,%rbx 10: 48 89 ee mov %rbp,%rsi 13: e8 a1 36 44 fd callq 0xfd4436b9 18: 48 83 fd 07 cmp $0x7,%rbp 1c: 0f 86 c0 01 00 00 jbe 0x1e2 22: e8 22 3a 44 fd callq 0xfd443a49 27: 45 31 ff xor %r15d,%r15d * 2a: 49 8b 04 1c mov (%r12,%rbx,1),%rax <-- trapping instruction 2e: 31 ff xor %edi,%edi 30: 44 89 fe mov %r15d,%esi 33: 49 89 c6 mov %rax,%r14 36: e8 5e 36 44 fd callq 0xfd443699 3b: 45 85 ff test %r15d,%r15d 3e: 0f .byte 0xf 3f: 84 .byte 0x84