kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 23463 Comm: syz-executor0 Not tainted 5.0.0-rc4-next-20190131 #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:relay_set_buf_dentry kernel/relay.c:412 [inline]
RIP: 0010:relay_open_buf.part.0+0x7cb/0xb40 kernel/relay.c:458
Code: c1 ea 03 80 3c 02 00 0f 85 4c 03 00 00 49 8d 7d 58 4d 89 ac 24 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1b 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffff88805425f958 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff88808dd695c0 RCX: ffffc90012a99000
RDX: 0000000000000008 RSI: ffffffff8170edb0 RDI: 0000000000000047
RBP: ffff88805425f9d0 R08: ffff88808cd62600 R09: ffff88808cd62ec8
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805eb26780
R13: ffffffffffffffef R14: 0000000000000000 R15: 0000000000000003
FS:  00007fb1d6a3d700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004effc4 CR3: 000000008d8b8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 relay_open_buf kernel/relay.c:447 [inline]
 relay_open kernel/relay.c:597 [inline]
 relay_open+0x523/0x980 kernel/relay.c:561
 do_blk_trace_setup+0x414/0xb90 kernel/trace/blktrace.c:532
 __blk_trace_setup+0xe3/0x190 kernel/trace/blktrace.c:577
 blk_trace_setup+0x4f/0x70 kernel/trace/blktrace.c:595
 sg_ioctl+0x369/0x2a00 drivers/scsi/sg.c:1117
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e39
Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb1d6a3cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e39
RDX: 00000000200001c0 RSI: 00000000c0481273 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb1d6a3d6d4
R13: 00000000004bf2e7 R14: 00000000004d0bd8 R15: 00000000ffffffff
Modules linked in:
---[ end trace e3e6e1881cb7a0ce ]---
RIP: 0010:relay_set_buf_dentry kernel/relay.c:412 [inline]
RIP: 0010:relay_open_buf.part.0+0x7cb/0xb40 kernel/relay.c:458
Code: c1 ea 03 80 3c 02 00 0f 85 4c 03 00 00 49 8d 7d 58 4d 89 ac 24 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1b 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffff88805425f958 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff88808dd695c0 RCX: ffffc90012a99000
RDX: 0000000000000008 RSI: ffffffff8170edb0 RDI: 0000000000000047
RBP: ffff88805425f9d0 R08: ffff88808cd62600 R09: ffff88808cd62ec8
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805eb26780
R13: ffffffffffffffef R14: 0000000000000000 R15: 0000000000000003
FS:  00007fb1d6a3d700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff04005fb8 CR3: 000000008d8b8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400