MINIX-fs: mounting unchecked file system, running fsck is recommended
minix_free_inode: bit 1 already cleared
minix_free_inode: bit 1 already cleared
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
Modules linked in:
CPU: 0 PID: 16875 Comm: syz-executor.0 Not tainted 4.14.174-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88800c7d8480 task.stack: ffff88800d1a0000
RIP: 0010:kobject_uevent_env+0xa3/0xc50 lib/kobject_uevent.c:355
RSP: 0018:ffff88800d1a7c48 EFLAGS: 00010206
RAX: 0000000000000018 RBX: 0000000000000002 RCX: 1ffff110018fb19e
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000000000c0
RBP: ffff8880a42998d0 R08: 0000000000000001 R09: 0000000000000003
R10: ffff88800c7d8d78 R11: ffff88800c7d8480 R12: 00000000000000a0
R13: dffffc0000000000 R14: ffff8880a42997c8 R15: 00000000000000a0
FS:  0000000001180940(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c434613ab4 CR3: 00000000538a0000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 loop_clr_fd+0x49e/0xad0 drivers/block/loop.c:1069
 __lo_release drivers/block/loop.c:1660 [inline]
 lo_release+0xff/0x190 drivers/block/loop.c:1678
 __blkdev_put+0x4ec/0x6a0 fs/block_dev.c:1791
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 deactivate_super fs/super.c:350 [inline]
 deactivate_super+0x7f/0xa0 fs/super.c:346
 cleanup_mnt+0xad/0x140 fs/namespace.c:1183
 task_work_run+0x113/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1d6/0x220 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45f277
RSP: 002b:00007fff18e586a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00000000000fe5dc RCX: 000000000045f277
RDX: 0000000000402f28 RSI: 0000000000000002 RDI: 00007fff18e58750
RBP: 000000000000014a R08: 0000000000000000 R09: 000000000000000b
R10: 0000000000000005 R11: 0000000000000246 R12: 00007fff18e597e0
R13: 0000000001181940 R14: 0000000000000000 R15: 00007fff18e597e0
Code: 03 42 80 3c 28 00 0f 85 2e 0a 00 00 4d 8b 64 24 18 4d 85 e4 0f 84 1e 02 00 00 e8 19 b4 1f fb 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 fa 09 00 00 49 8b 6c 24 20 48 85 ed 74 b0 
RIP: kobject_uevent_env+0xa3/0xc50 lib/kobject_uevent.c:355 RSP: ffff88800d1a7c48
---[ end trace 4734470b8b7d2951 ]---