WARNING: ODEBUG bug in process_one

WARNING: ODEBUG bug in process_one_work (2)
Status: upstream: reported syz repro on 2020/09/02 18:18
Reported-by: syzbot+91923aae0b157bd6c0c5@syzkaller.appspotmail.com
First crash: 516d, last: 516d

Cause bisection: failed (bisect log)

Fix bisection: failed (bisect log)

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING: ODEBUG bug in process_one_work				1	728d	727d	0/22	auto-closed as invalid on 2020/05/29 06:58

Sample crash report:

------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: xprt_init_autodisconnect+0x0/0x150 include/linux/refcount.h:274
WARNING: CPU: 1 PID: 8854 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 lib/debugobjects.c:485
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8854 Comm: kworker/1:10 Not tainted 5.9.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events kfree_rcu_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x4a kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:debug_print_object+0x160/0x250 lib/debugobjects.c:485
Code: dd a0 26 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd a0 26 94 88 48 c7 c7 00 1c 94 88 e8 52 38 a6 fd <0f> 0b 83 05 53 4f 13 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89
RSP: 0018:ffffc9000b68fb28 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffff8880a216c300 RSI: ffffffff815dafc7 RDI: fffff520016d1f57
RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ae720f8b
R10: 0000000000000000 R11: 0000000035383854 R12: ffffffff89be2ea0
R13: ffffffff81638450 R14: dead000000000100 R15: dffffc0000000000
 __debug_check_no_obj_freed lib/debugobjects.c:967 [inline]
 debug_check_no_obj_freed+0x301/0x41c lib/debugobjects.c:998
 kmem_cache_free_bulk+0x9e/0x190 mm/slab.c:3718
 kfree_bulk include/linux/slab.h:411 [inline]
 kfree_rcu_work+0x506/0x8c0 kernel/rcu/tree.c:3150
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce-root	2020/08/29 18:15	upstream	4d41ead6ead9	d5a3ae1f	.config	log	report	syz