RAX: ffffffffffffffda RBX: 00007f8e7eb1a6d4 RCX: 0000000000455ba9
RDX: 00000000200014c0 RSI: 000000003208f98a RDI: 000000000000000b
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 0000000000000013
R13: 00000000004c00ba R14: 00000000004cf610 R15: 0000000000000006
BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
PGD 800000007591c067 P4D 800000007591c067 PUD 7288a067 PMD 0 
Oops: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 16445 Comm: syz-executor7 Not tainted 4.17.0+ #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:map_vm_area+0x69/0x1f0 mm/vmalloc.c:1353
RSP: 0018:ffff88007730f920 EFLAGS: 00010046
RAX: ffffffff81af394c RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900037a8000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffff88007730f998 R08: 00000000010000c0 R09: ffff88021fd39050
R10: 0000000000000002 R11: ffffffff81351e50 R12: ffff88021fd39050
R13: 0000000000000000 R14: 0000000000000008 R15: 0000000000000000
FS:  00007f8e7eb1a700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 00000000726c4000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 kmsan_vmap+0x124/0x1e0 mm/kmsan/kmsan_hooks.c:181
 vmap+0x3b2/0x4b0 mm/vmalloc.c:1661
 big_key_alloc_buffer+0x638/0xa30 security/keys/big_key.c:188
 big_key_read+0x1e7/0xa70 security/keys/big_key.c:373
 keyctl_read_key+0x47b/0x500 security/keys/keyctl.c:799
 __do_sys_keyctl security/keys/keyctl.c:1679 [inline]
 __se_sys_keyctl+0xc2a/0x1930 security/keys/keyctl.c:1637
 __x64_sys_keyctl+0x15d/0x1b0 security/keys/keyctl.c:1637
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x455ba9
RSP: 002b:00007f8e7eb19c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00007f8e7eb1a6d4 RCX: 0000000000455ba9
RDX: 00000000200014c0 RSI: 000000003208f98a RDI: 000000000000000b
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 0000000000000013
R13: 00000000004c00ba R14: 00000000004cf610 R15: 0000000000000006
Code: 24 08 48 89 45 a0 41 8b 84 24 90 0c 00 00 89 45 cc 45 8b bc 24 88 0c 00 00 e8 34 16 b6 ff 4d 8d 75 08 48 85 db 0f 85 5b 01 00 00 <49> 8b 45 08 48 89 45 a8 4c 89 f7 e8 d7 aa 0e 00 4d 8d 75 18 48 
RIP: map_vm_area+0x69/0x1f0 mm/vmalloc.c:1353 RSP: ffff88007730f920
CR2: 0000000000000008
---[ end trace 5ff5e3b08eb57efc ]---
BUG: unable to handle kernel NULL pointer dereference at 0000000000000008