------------[ cut here ]------------ kobject: 'loop3' (00000000a51da33e): kobject_uevent_env kobject: 'loop3' (00000000a51da33e): fill_kobj_path: path = '/devices/virtual/block/loop3' ODEBUG: free active (active state 1) object type: rcu_head hint: (null) WARNING: CPU: 0 PID: 7263 at lib/debugobjects.c:325 debug_print_object+0x168/0x250 lib/debugobjects.c:325 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7263 Comm: syz-executor.4 Not tainted 4.19.75 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x263/0x507 kernel/panic.c:185 kobject: 'loop5' (00000000c855179d): kobject_uevent_env kobject: 'loop5' (00000000c855179d): fill_kobj_path: path = '/devices/virtual/block/loop5' __warn.cold+0x20/0x4a kernel/panic.c:540 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296 audit: type=1804 audit(1569724701.717:54): pid=7879 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir592333461/syzkaller.oWcpS6/19/bus" dev="sda1" ino=16608 res=1 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037 RIP: 0010:debug_print_object+0x168/0x250 lib/debugobjects.c:325 kobject: 'loop2' (00000000c2a24880): kobject_uevent_env Code: dd 20 56 82 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 20 56 82 87 48 c7 c7 60 4b 82 87 e8 d6 04 19 fe <0f> 0b 83 05 cb 83 17 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 RSP: 0018:ffff88805b1979d0 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8155dbd6 RDI: ffffed100b632f2c RBP: ffff88805b197a10 R08: ffff88805b18a300 R09: ffffed1015d03ee3 R10: ffffed1015d03ee2 R11: ffff8880ae81f717 R12: 0000000000000001 R13: ffffffff8879f200 R14: 0000000000000000 R15: ffff888087863320 kobject: 'loop2' (00000000c2a24880): fill_kobj_path: path = '/devices/virtual/block/loop2' __debug_check_no_obj_freed lib/debugobjects.c:785 [inline] debug_check_no_obj_freed+0x29f/0x464 lib/debugobjects.c:817 kmem_cache_free+0x18f/0x260 mm/slab.c:3764 kobject: 'loop5' (00000000c855179d): kobject_uevent_env free_task_struct kernel/fork.c:162 [inline] free_task+0xdd/0x120 kernel/fork.c:416 __put_task_struct+0x20f/0x4c0 kernel/fork.c:689 put_task_struct include/linux/sched/task.h:96 [inline] finish_task_switch+0x52b/0x780 kernel/sched/core.c:2710 context_switch kernel/sched/core.c:2829 [inline] __schedule+0x86e/0x1dc0 kernel/sched/core.c:3474 kobject: 'loop5' (00000000c855179d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (0000000063503cf4): kobject_uevent_env schedule+0x92/0x1c0 kernel/sched/core.c:3518 SELinux: truncated policydb string identifier freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x201/0x690 kernel/time/hrtimer.c:1688 kobject: 'loop0' (0000000063503cf4): fill_kobj_path: path = '/devices/virtual/block/loop0' hrtimer_nanosleep+0x2a6/0x570 kernel/time/hrtimer.c:1742 kobject: 'loop3' (00000000a51da33e): kobject_uevent_env SELinux: failed to load policy __do_sys_nanosleep kernel/time/hrtimer.c:1776 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1763 [inline] __x64_sys_nanosleep+0x1a6/0x220 kernel/time/hrtimer.c:1763 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'loop3' (00000000a51da33e): fill_kobj_path: path = '/devices/virtual/block/loop3' RIP: 0033:0x457ed0 Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d 81 e8 61 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 24 d3 fb ff c3 48 83 ec 08 e8 ea 46 00 00 RSP: 002b:00007ffff9003968 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 000000000003258e RCX: 0000000000457ed0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffff9003970 RBP: 000000000000003f R08: 0000000000000001 R09: 00005555555de940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffff90039c0 R14: 000000000003257b R15: 00007ffff90039d0 ======================================================