relay: one or more items not logged [item size (56) > sub-buffer size (9)]
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
devpts: called with bogus options
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 18666 Comm: syz-executor.5 Not tainted 4.14.160-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808cf82380 task.stack: ffff88802ba68000
RIP: 0010:relay_switch_subbuf+0x1f3/0x8e0 kernel/relay.c:754
RSP: 0018:ffff88802ba6fa88 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8880a6f41dc0 RCX: ffffc9000682b000
RDX: 000000000000000a RSI: ffffffff815dcb4b RDI: 0000000000000050
RBP: ffff88802ba6fad8 R08: dffffc0000000000 R09: ffffffff8958dc98
R10: ffff88802ba6fad8 R11: ffff88808cf82380 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880527f43c0 R15: 0000000000000000
FS:  00007f787cf47700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 000000009fe8c000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 relay_flush kernel/relay.c:882 [inline]
 relay_flush+0x1ae/0x270 kernel/relay.c:866
 blk_trace_startstop+0x203/0x5c0 kernel/trace/blktrace.c:657
kobject: 'loop1' (ffff8880a401b4e0): kobject_uevent_env
 blk_trace_ioctl+0x1b1/0x270 kernel/trace/blktrace.c:705
kobject: 'loop1' (ffff8880a401b4e0): fill_kobj_path: path = '/devices/virtual/block/loop1'
 blkdev_ioctl+0x100/0x1860 block/ioctl.c:580
 block_ioctl+0xde/0x120 fs/block_dev.c:1881
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a919
RSP: 002b:00007f787cf46c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a919
RDX: 0000000000000000 RSI: 0000000000001275 RDI: 0000000000000003
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f787cf476d4
R13: 00000000004c2301 R14: 00000000004d74d8 R15: 00000000ffffffff
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 9d 06 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 7b 58 49 8d 7f 50 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5e 06 00 00 48 ba 00 00 00 00 00 fc ff df 49 
RIP: relay_switch_subbuf+0x1f3/0x8e0 kernel/relay.c:754 RSP: ffff88802ba6fa88
kobject: 'loop0' (ffff888050efb4e0): kobject_uevent_env
kobject: 'loop0' (ffff888050efb4e0): fill_kobj_path: path = '/devices/virtual/block/loop0'
---[ end trace 4630b2e189ddcda9 ]---