------------[ cut here ]------------ kernel BUG at mm/memory.c:2103! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3606 Comm: syz-executor294 Not tainted 5.16.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vmf_insert_pfn_prot+0x248/0x450 mm/memory.c:2103 Code: 0f 0b e8 eb 70 ca ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 67 73 ca ff 49 83 ff 20 0f 85 a5 fe ff ff e8 c8 70 ca ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 b7 70 ca ff 4d 21 ee 4c 89 RSP: 0018:ffffc90001abf8d0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff92000357f1c RCX: 0000000000000000 RDX: ffff88801a7a0000 RSI: ffffffff81ad2168 RDI: 0000000000000003 RBP: ffff888018da3210 R08: 0000000000000020 R09: ffffc90001abf8b7 R10: ffffffff81ad2159 R11: 0000000000000000 R12: 0000000020000000 R13: 0000000000018a59 R14: 0000000008040475 R15: 0000000000000020 FS: 00005555571ad3c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 0000000019180000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_gem_shmem_fault+0x1e3/0x290 drivers/gpu/drm/drm_gem_shmem_helper.c:567 __do_fault+0x10d/0x4d0 mm/memory.c:3849 do_read_fault mm/memory.c:4164 [inline] do_fault mm/memory.c:4293 [inline] handle_pte_fault mm/memory.c:4551 [inline] __handle_mm_fault+0x28e8/0x5120 mm/memory.c:4686 handle_mm_fault+0x1c8/0x790 mm/memory.c:4784 do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568 RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline] RIP: 0010:strncpy_from_user+0x1dc/0x3e0 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 66 57 7a fd 48 83 fd 07 0f 86 bd 01 00 00 e8 c7 54 7a fd 45 31 ff <4d> 8b 34 1c 31 ff 44 89 fe e8 d6 56 7a fd 45 85 ff 0f 84 55 ff ff RSP: 0018:ffffc90001abfd08 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801a7a0000 RSI: ffffffff83fd3d69 RDI: 0000000000000003 RBP: 0000000000000fe0 R08: 0000000000000007 R09: 0000000000000001 R10: ffffffff83fd3cc9 R11: 0000000000000000 R12: 0000000020000000 R13: ffff88801cfa9120 R14: 0000000020000fe0 R15: 0000000000000000 getname_flags.part.0+0x95/0x4f0 fs/namei.c:149 getname_flags include/linux/audit.h:323 [inline] getname+0x8e/0xd0 fs/namei.c:217 do_sys_openat2+0xf5/0x4d0 fs/open.c:1206 do_sys_open fs/open.c:1228 [inline] __do_sys_openat fs/open.c:1244 [inline] __se_sys_openat fs/open.c:1239 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1239 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4b4c51c3b9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 c4 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffce435a308 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffce435a318 RCX: 00007f4b4c51c3b9 RDX: 0000000000000040 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007ffce435a310 R08: 00007ffce435a310 R09: 00007f4b4c4df030 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 84f9f0375fb4d94d ]--- RIP: 0010:vmf_insert_pfn_prot+0x248/0x450 mm/memory.c:2103 Code: 0f 0b e8 eb 70 ca ff 4d 89 f7 bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 67 73 ca ff 49 83 ff 20 0f 85 a5 fe ff ff e8 c8 70 ca ff <0f> 0b 49 be ff ff ff ff ff ff 0f 00 e8 b7 70 ca ff 4d 21 ee 4c 89 RSP: 0018:ffffc90001abf8d0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff92000357f1c RCX: 0000000000000000 RDX: ffff88801a7a0000 RSI: ffffffff81ad2168 RDI: 0000000000000003 RBP: ffff888018da3210 R08: 0000000000000020 R09: ffffc90001abf8b7 R10: ffffffff81ad2159 R11: 0000000000000000 R12: 0000000020000000 R13: 0000000000018a59 R14: 0000000008040475 R15: 0000000000000020 FS: 00005555571ad3c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563f738b5dc0 CR3: 0000000019180000 CR4: 00000000003506f0 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 66 57 7a fd callq 0xfd7a577e 18: 48 83 fd 07 cmp $0x7,%rbp 1c: 0f 86 bd 01 00 00 jbe 0x1df 22: e8 c7 54 7a fd callq 0xfd7a54ee 27: 45 31 ff xor %r15d,%r15d * 2a: 4d 8b 34 1c mov (%r12,%rbx,1),%r14 <-- trapping instruction 2e: 31 ff xor %edi,%edi 30: 44 89 fe mov %r15d,%esi 33: e8 d6 56 7a fd callq 0xfd7a570e 38: 45 85 ff test %r15d,%r15d 3b: 0f .byte 0xf 3c: 84 55 ff test %dl,-0x1(%rbp) 3f: ff .byte 0xff