IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
hrtimer: interrupt took 24701 ns
kasan: CONFIG_KASAN_INLINE enabled
kobject: 'loop4' (ffff8880a4b1d460): kobject_uevent_env
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
kobject: 'loop4' (ffff8880a4b1d460): fill_kobj_path: path = '/devices/virtual/block/loop4'
CPU: 1 PID: 6787 Comm: syz-executor777 Not tainted 4.14.141 #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808fbf2180 task.stack: ffff888087d08000
RIP: 0010:loop_validate_file+0x206/0x2d0 drivers/block/loop.c:633
RSP: 0018:ffff888087d0fbc0 EFLAGS: 00010202
RAX: 0000000000000037 RBX: ffff8880a77b6218 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8880a77e0700 RDI: 00000000000001b8
RBP: ffff888087d0fbe0 R08: ffff88808fbf2180 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88808fbf2180 R12: 0000000000000000
R13: ffff8880a77e0700 R14: dffffc0000000000 R15: ffff888219561c90
FS:  00007f1c27602700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c27601db8 CR3: 0000000085fbb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 loop_set_fd drivers/block/loop.c:897 [inline]
 lo_ioctl+0xaa6/0x1ce0 drivers/block/loop.c:1407
 __blkdev_driver_ioctl block/ioctl.c:297 [inline]
 blkdev_ioctl+0x96b/0x1860 block/ioctl.c:594
 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: 0033:0x44dc49
RSP: 002b:00007f1c27601ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006e6a18 RCX: 000000000044dc49
RDX: 0000000000000006 RSI: 0000000000004c00 RDI: 0000000000000004
RBP: 00000000006e6a10 R08: 00007f1c27602700 R09: 0000000000000000
R10: 00007f1c27602700 R11: 0000000000000246 R12: 00000000006e6a1c
R13: 00007fff92f63faf R14: 00007f1c276029c0 R15: 0000000000000001
Code: 00 00 48 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 85 d4 00 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b8 01 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 a8 00 00 00 4d 8b a4 24 b8 01 00 00 4c 89 
RIP: loop_validate_file+0x206/0x2d0 drivers/block/loop.c:633 RSP: ffff888087d0fbc0
---[ end trace fa376e453dbfae2f ]---