Not allocated shadow for addr ffff880100000000 (page ffffea0006000000)
Attempted to access 128 bytes
------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan.c:1140!
invalid opcode: 0000 [#1] SMP PTI
CPU: 1 PID: 30205 Comm: syz-executor6 Not tainted 4.18.0-rc8+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_get_shadow_address+0x306/0x3d0 mm/kmsan/kmsan.c:1139
Code: 89 31 c0 4c 89 ee 48 89 ca e8 76 15 81 ff 80 3c 25 38 f5 15 8a 00 75 12 48 c7 c7 31 98 49 89 31 c0 48 8b 75 d0 e8 5a 15 81 ff <0f> 0b 0f 1f 84 00 00 00 00 00 eb fe 48 3d ff ff ff 1f 0f 87 70 fd 
RSP: 0018:ffff880111d6f8f0 EFLAGS: 00010082
RAX: 000000000000001d RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000002123 RDI: 0000000000002124
RBP: ffff880111d6f920 R08: 0000000000000000 R09: ffff88021fd39090
R10: 0000000000000000 R11: ffffffff85031d70 R12: 0000000000000001
R13: ffff880100000000 R14: 0000000000000001 R15: 0000000000000080
FS:  00007f44ad419700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44ad418db8 CR3: 0000000102c94000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 kmsan_internal_memset_shadow mm/kmsan/kmsan.c:164 [inline]
 kmsan_internal_poison_shadow+0x6c/0x1b0 mm/kmsan/kmsan.c:180
 kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91
 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2720 [inline]
 slab_alloc mm/slub.c:2728 [inline]
 kmem_cache_alloc+0xaca/0xb90 mm/slub.c:2733
 ep_insert fs/eventpoll.c:1428 [inline]
 __do_sys_epoll_ctl fs/eventpoll.c:2113 [inline]
 __se_sys_epoll_ctl+0x16e4/0x56d0 fs/eventpoll.c:1999
 __x64_sys_epoll_ctl+0x11e/0x170 fs/eventpoll.c:1999
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457089
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f44ad418c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9
RAX: ffffffffffffffda RBX: 00007f44ad4196d4 RCX: 0000000000457089
RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cb730 R14: 00000000004c3218 R15: 0000000000000002
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 7584b772a24d47df ]---
RIP: 0010:kmsan_get_shadow_address+0x306/0x3d0 mm/kmsan/kmsan.c:1139
Code: 89 31 c0 4c 89 ee 48 89 ca e8 76 15 81 ff 80 3c 25 38 f5 15 8a 00 75 12 48 c7 c7 31 98 49 89 31 c0 48 8b 75 d0 e8 5a 15 81 ff <0f> 0b 0f 1f 84 00 00 00 00 00 eb fe 48 3d ff ff ff 1f 0f 87 70 fd 
RSP: 0018:ffff880111d6f8f0 EFLAGS: 00010082
RAX: 000000000000001d RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000002123 RDI: 0000000000002124
RBP: ffff880111d6f920 R08: 0000000000000000 R09: ffff88021fd39090
R10: 0000000000000000 R11: ffffffff85031d70 R12: 0000000000000001
R13: ffff880100000000 R14: 0000000000000001 R15: 0000000000000080
FS:  00007f44ad419700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44ad418db8 CR3: 0000000102c94000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600