Free swap  = 0kB
Total swap = 0kB
1965969 pages RAM
0 pages HighMem/MovableOnly
106560 pages reserved
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 800000019e38a067 P4D 800000019e38a067 PUD 191792067 PMD 0 
Oops: 0002 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 8009 Comm: syz-executor6 Not tainted 4.17.0+ #19
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_vmap+0xd8/0x1e0 mm/kmsan/kmsan.c:906
RSP: 0018:ffff88012a85f4c0 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff880123e60a20 RCX: ffffea0009c546c0
RDX: ffffea0009c54660 RSI: 0000000000046eb8 RDI: ffffea0000421320
RBP: ffff88012a85f520 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff86577860 R12: ffffc90011ced000
R13: ffff880123e60ae0 R14: 0000000000000000 R15: ffff88000e400000
FS:  00007f9c0b7ea700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001bcaa8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vmap+0x3b2/0x4b0 mm/vmalloc.c:1661
 relay_alloc_buf kernel/relay.c:141 [inline]
 relay_create_buf kernel/relay.c:176 [inline]
 relay_open_buf+0x8a1/0x1760 kernel/relay.c:449
 relay_open+0xa2f/0x1290 kernel/relay.c:596
 do_blk_trace_setup+0x950/0x1410 kernel/trace/blktrace.c:544
 __blk_trace_setup+0x1cc/0x320 kernel/trace/blktrace.c:589
 blk_trace_ioctl+0x276/0x960 kernel/trace/blktrace.c:728
 blkdev_ioctl+0x193d/0x4f80 block/ioctl.c:587
 block_ioctl+0x16f/0x1d0 fs/block_dev.c:1877
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xcbd/0x24b0 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:287
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x455ab9
RSP: 002b:00007f9c0b7e9c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9c0b7ea6d4 RCX: 0000000000455ab9
RDX: 0000000020000140 RSI: 00000000c0481273 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bc7be R14: 00000000004ca980 R15: 0000000000000000
Code: c0 48 8b 5d b8 74 2f 89 c6 31 c0 0f 1f 84 00 00 00 00 00 48 98 49 8b 0c c4 80 79 50 00 74 6f 48 8b 51 40 49 89 14 c7 48 8b 49 48 <49> 89 0c c6 83 c0 01 39 f0 72 dd 48 c7 45 b0 00 00 00 00 9c 8f 
RIP: kmsan_vmap+0xd8/0x1e0 mm/kmsan/kmsan.c:906 RSP: ffff88012a85f4c0
CR2: 0000000000000000
---[ end trace 29d2f74ced47b52e ]---