RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 00000000004bc7c4 R14: 00000000004caea0 R15: 0000000000000011
BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
PGD 80000000b3cb6067 P4D 80000000b3cb6067 PUD b39c5067 PMD 0 
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 32109 Comm: syz-executor3 Not tainted 4.18.0-rc4+ #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:map_vm_area+0x69/0x1f0 mm/vmalloc.c:1340
Code: 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 a4 4a b3 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 47 ef 0e 00 4d 8d 75 18 48 8b 
RSP: 0018:ffff8800af0df410 EFLAGS: 00010046
RAX: ffffffff81b4e06c RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90003dab000 RSI: 0000000000039746 RDI: 0000000000039747
RBP: ffff8800af0df488 R08: 00000000004000c0 R09: ffff88021fc39090
R10: 0000000000000002 R11: 0000000000000000 R12: ffff88021fc39090
R13: 0000000000000000 R14: 0000000000000008 R15: 0000000000000000
FS:  00007f0ecc801700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 00000000af198000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 kmsan_vmap+0x134/0x200 mm/kmsan/kmsan_hooks.c:181
 vmap+0x3b2/0x540 mm/vmalloc.c:1648
 relay_alloc_buf kernel/relay.c:141 [inline]
 relay_create_buf kernel/relay.c:177 [inline]
 relay_open_buf+0x8ed/0x17f0 kernel/relay.c:450
 relay_open+0xa72/0x12d0 kernel/relay.c:597
 do_blk_trace_setup+0x950/0x1410 kernel/trace/blktrace.c:544
 __blk_trace_setup+0x20f/0x380 kernel/trace/blktrace.c:589
 blk_trace_ioctl+0x283/0x980 kernel/trace/blktrace.c:728
 blkdev_ioctl+0x1702/0x4fb0 block/ioctl.c:587
 block_ioctl+0x16f/0x1d0 fs/block_dev.c:1880
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xdef/0x2740 fs/ioctl.c:686
 ksys_ioctl fs/ioctl.c:701 [inline]
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x280/0x320 fs/ioctl.c:706
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x455ab9
Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f0ecc800c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0ecc8016d4 RCX: 0000000000455ab9
RDX: 0000000020000140 RSI: 00000000c0481273 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 00000000004bc7c4 R14: 00000000004caea0 R15: 0000000000000011
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 0000000000000008
---[ end trace 1cb3e0e05ec194ee ]---
RIP: 0010:map_vm_area+0x69/0x1f0 mm/vmalloc.c:1340
Code: 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 a4 4a b3 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 47 ef 0e 00 4d 8d 75 18 48 8b 
RSP: 0018:ffff8800af0df410 EFLAGS: 00010046
RAX: ffffffff81b4e06c RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90003dab000 RSI: 0000000000039746 RDI: 0000000000039747
RBP: ffff8800af0df488 R08: 00000000004000c0 R09: ffff88021fc39090
R10: 0000000000000002 R11: 0000000000000000 R12: ffff88021fc39090
R13: 0000000000000000 R14: 0000000000000008 R15: 0000000000000000
FS:  00007f0ecc801700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 00000000af198000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600