general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 22221 Comm: syz-executor.4 Not tainted 4.14.142 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88807fb8a080 task.stack: ffff888066738000
RIP: 0010:loop_validate_file+0x206/0x2d0 drivers/block/loop.c:633
RSP: 0018:ffff88806673fbc0 EFLAGS: 00010202
RAX: 0000000000000037 RBX: ffff8880891a8b18 RCX: ffffc90009c54000
RDX: 0000000000000095 RSI: ffffffff837339f5 RDI: 00000000000001b8
RBP: ffff88806673fbe0 R08: ffff88807fb8a080 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88807fb8a080 R12: 0000000000000000
R13: ffff88805f51a140 R14: dffffc0000000000 R15: ffff88808a7d4a50
FS:  00007f9d11f4d700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
netlink: 104 bytes leftover after parsing attributes in process `syz-executor.1'.
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002001d000 CR3: 0000000082eb7000 CR4: 00000000001426e0
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
netlink: 104 bytes leftover after parsing attributes in process `syz-executor.1'.
RIP: 0033:0x4598e9
RSP: 002b:00007f9d11f4cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9d11f4d6d4
R13: 00000000004c2fb9 R14: 00000000004d6738 R15: 00000000ffffffff
Code: 
kobject: 'loop3' (ffff8880a4aa8b20): kobject_uevent_env
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 
kobject: 'loop3' (ffff8880a4aa8b20): fill_kobj_path: path = '/devices/virtual/block/loop3'
00 4d 8b a4 24 b8 01 00 00 4c 89 
kobject: 'loop3' (ffff8880a4aa8b20): kobject_uevent_env
RIP: loop_validate_file+0x206/0x2d0 drivers/block/loop.c:633 RSP: ffff88806673fbc0
kobject: 'loop3' (ffff8880a4aa8b20): fill_kobj_path: path = '/devices/virtual/block/loop3'
---[ end trace cae4c90e5b44479b ]---
kobject: 'loop2' (ffff8880a4a46aa0): kobject_uevent_env