next ffff8880a97e5e70 prev ffff88809eaacc60 mm ffff88809f93b600 prot 25 anon_vma 0000000000000000 vm_ops ffffffff8871e3a0 pgoff 0 file ffff8880b2ad7000 private_data 0000000000000000 flags: 0x20fe(write|exec|shared|mayread|maywrite|mayexec|mayshare|locked) ------------[ cut here ]------------ kernel BUG at mm/memory.c:4081! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8140 Comm: syz-executor375 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:wp_huge_pmd mm/memory.c:4081 [inline] RIP: 0010:__handle_mm_fault+0x2888/0x41c0 mm/memory.c:4289 Code: aa d5 ff 84 db 0f 84 35 e3 ff ff e8 92 a9 d5 ff 48 89 ef e8 8a ce f4 ff e9 23 e3 ff ff e8 80 a9 d5 ff 48 89 ef e8 07 b9 67 06 <0f> 0b e8 71 a9 d5 ff 4c 8d 4c 24 60 4c 89 cf e8 04 c0 0d 00 41 89 RSP: 0018:ffff888094c17778 EFLAGS: 00010283 RAX: 0000000000000140 RBX: 0000000000000008 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012982eca RBP: ffff8880b4c25880 R08: 0000000000000140 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 000000008b4000e5 R13: 1ffff11012982ef5 R14: 0000000000000001 R15: ffff88809f93b600 FS: 00007f55c58ba700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc154211010 CR3: 00000000a8e3d000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: handle_mm_fault+0x436/0xb10 mm/memory.c:4336 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0010:ep_send_events_proc+0x5c1/0xb50 fs/eventpoll.c:1670 Code: 0f 85 d6 04 00 00 48 81 c4 b0 00 00 00 31 c0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 2a a2 ad ff 0f 01 cb 45 31 f6 48 8b 44 24 30 <44> 89 38 0f 01 ca 31 ff 44 89 f6 e8 7f a3 ad ff 45 85 f6 0f 85 22 RSP: 0018:ffff888094c17a98 EFLAGS: 00050246 RAX: 0000000020000100 RBX: ffff8880a0da4798 RCX: ffffffff81b4df7d RDX: 0000000000000000 RSI: ffffffff81b4e346 RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000074071 R12: ffff8880a0da47a0 R13: ffff888094c17d38 R14: 0000000000000000 R15: 0000000000000004 ep_scan_ready_list+0x285/0x9a0 fs/eventpoll.c:706 ep_send_events fs/eventpoll.c:1711 [inline] ep_poll+0x36f/0xcb0 fs/eventpoll.c:1838 do_epoll_wait+0x1aa/0x200 fs/eventpoll.c:2190 __do_sys_epoll_pwait fs/eventpoll.c:2227 [inline] __se_sys_epoll_pwait+0x252/0x290 fs/eventpoll.c:2207 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f55c592df89 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 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:00007f55c58ba268 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 RAX: ffffffffffffffda RBX: 00007f55c59b2430 RCX: 00007f55c592df89 RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000008 RBP: 00007f55c597f190 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000fffeffff R11: 0000000000000246 R12: 776c613d65677568 R13: 00007ffda6ba01cf R14: 65725f7261656c63 R15: 00007f55c59b2438 Modules linked in: ---[ end trace aca321c0a905ed68 ]--- RIP: 0010:wp_huge_pmd mm/memory.c:4081 [inline] RIP: 0010:__handle_mm_fault+0x2888/0x41c0 mm/memory.c:4289 Code: aa d5 ff 84 db 0f 84 35 e3 ff ff e8 92 a9 d5 ff 48 89 ef e8 8a ce f4 ff e9 23 e3 ff ff e8 80 a9 d5 ff 48 89 ef e8 07 b9 67 06 <0f> 0b e8 71 a9 d5 ff 4c 8d 4c 24 60 4c 89 cf e8 04 c0 0d 00 41 89 RSP: 0018:ffff888094c17778 EFLAGS: 00010283 RAX: 0000000000000140 RBX: 0000000000000008 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012982eca RBP: ffff8880b4c25880 R08: 0000000000000140 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 000000008b4000e5 R13: 1ffff11012982ef5 R14: 0000000000000001 R15: ffff88809f93b600 FS: 00007f55c58ba700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000100 CR3: 00000000a8e3d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 85 d6 04 00 00 jne 0x4dc 6: 48 81 c4 b0 00 00 00 add $0xb0,%rsp d: 31 c0 xor %eax,%eax f: 5b pop %rbx 10: 5d pop %rbp 11: 41 5c pop %r12 13: 41 5d pop %r13 15: 41 5e pop %r14 17: 41 5f pop %r15 19: c3 retq 1a: e8 2a a2 ad ff callq 0xffada249 1f: 0f 01 cb stac 22: 45 31 f6 xor %r14d,%r14d 25: 48 8b 44 24 30 mov 0x30(%rsp),%rax * 2a: 44 89 38 mov %r15d,(%rax) <-- trapping instruction 2d: 0f 01 ca clac 30: 31 ff xor %edi,%edi 32: 44 89 f6 mov %r14d,%esi 35: e8 7f a3 ad ff callq 0xffada3b9 3a: 45 85 f6 test %r14d,%r14d 3d: 0f .byte 0xf 3e: 85 22 test %esp,(%rdx)