Free swap = 0kB Total swap = 0kB 1965969 pages RAM 0 pages HighMem/MovableOnly 101371 pages reserved BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD 800000012a279067 P4D 800000012a279067 PUD 12a27c067 PMD 0 Oops: 0002 [#1] SMP PTI CPU: 1 PID: 8243 Comm: syz-executor3 Not tainted 4.18.0-rc8+ #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kmsan_vmap+0xd8/0x1e0 mm/kmsan/kmsan_hooks.c:177 Code: 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 45 RSP: 0018:ffff88012a51f4c0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff8801c6017780 RCX: ffffea0002ca4bc0 RDX: ffffea0002ca4b60 RSI: 0000000000024001 RDI: ffffea00003a7e20 RBP: ffff88012a51f520 R08: 0000000000480020 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff85031d70 R12: ffffc9007db94000 R13: ffff8801c6017ea0 R14: 0000000000000000 R15: ffff88000c800000 FS: 00007fd7024b2700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000012a284000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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+0x742/0x1730 kernel/relay.c:450 relay_open+0x9ee/0x1260 kernel/relay.c:597 do_blk_trace_setup+0x945/0x1360 kernel/trace/blktrace.c:544 __blk_trace_setup+0x1c8/0x320 kernel/trace/blktrace.c:589 blk_trace_ioctl+0x267/0x950 kernel/trace/blktrace.c:728 blkdev_ioctl+0x1d40/0x55c0 block/ioctl.c:587 block_ioctl+0x16f/0x1d0 fs/block_dev.c:1881 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0xc77/0x2670 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/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:00007fd7024b1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd7024b26d4 RCX: 0000000000457089 RDX: 00000000200007c0 RSI: 00000000c0481273 RDI: 0000000000000004 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cd5c0 R14: 00000000004c3ff9 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: 0000000000000000 ---[ end trace c29636f87b4df266 ]--- RIP: 0010:kmsan_vmap+0xd8/0x1e0 mm/kmsan/kmsan_hooks.c:177 Code: 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 45 RSP: 0018:ffff88012a51f4c0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff8801c6017780 RCX: ffffea0002ca4bc0 RDX: ffffea0002ca4b60 RSI: 0000000000024001 RDI: ffffea00003a7e20 RBP: ffff88012a51f520 R08: 0000000000480020 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff85031d70 R12: ffffc9007db94000 R13: ffff8801c6017ea0 R14: 0000000000000000 R15: ffff88000c800000 FS: 00007fd7024b2700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000012a284000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600