!!!! css_killed_ref_fn enqueue(ffff88810fa85c00) !!!! css_release enqueue(ffff88810fa85c00) list_add corruption. prev->next should be next (ffff8881f725c060), but was ffff88810fa85c70. (prev=ffff88810fa85c70). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:28! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 160 Comm: udevd Tainted: G W 5.10.110-syzkaller-00001-g3e2849f855c8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_add_valid+0xc6/0xd0 lib/list_debug.c:26 Code: 48 c7 c7 40 de 43 85 4c 89 e6 4c 89 f1 31 c0 e8 8d 10 40 02 0f 0b 48 c7 c7 00 df 43 85 4c 89 f6 4c 89 e1 31 c0 e8 77 10 40 02 <0f> 0b 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 54 53 49 RSP: 0018:ffffc90000007a00 EFLAGS: 00010046 RAX: 0000000000000075 RBX: ffff8881f725c068 RCX: bb7b7fc54d456a00 RDX: 0000000000000101 RSI: 0000000000000101 RDI: 0000000000000000 RBP: ffffc90000007a28 R08: ffffffff8153b2f8 R09: ffffed103ee44e83 R10: ffffed103ee44e83 R11: 1ffff1103ee44e82 R12: ffff88810fa85c70 R13: dffffc0000000000 R14: ffff8881f725c060 R15: ffff88810fa85c70 FS: 00007f5034e8d840(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00077b000 CR3: 000000010cca9000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:67 [inline] list_add_tail include/linux/list.h:100 [inline] insert_work+0x107/0x330 kernel/workqueue.c:1352 __queue_work+0x971/0xd30 kernel/workqueue.c:1514 queue_work_on+0xf2/0x150 kernel/workqueue.c:1541 queue_work include/linux/workqueue.h:513 [inline] css_release+0xc0/0xd0 kernel/cgroup/cgroup.c:5158 percpu_ref_put_many include/linux/percpu-refcount.h:322 [inline] percpu_ref_put include/linux/percpu-refcount.h:338 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:162 [inline] percpu_ref_switch_to_atomic_rcu+0x5a2/0x5b0 lib/percpu-refcount.c:199 rcu_do_batch+0x4f8/0xbc0 kernel/rcu/tree.c:2485 rcu_core+0x59b/0xe30 kernel/rcu/tree.c:2722 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2735 __do_softirq+0x27e/0x596 kernel/softirq.c:305 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:402 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:432 irq_exit_rcu+0x9/0x10 kernel/softirq.c:444 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:dput+0x1/0x320 fs/dcache.c:860 Code: 08 4c 89 ff e8 40 4f f2 ff 41 80 4f 02 01 4c 89 f7 e8 73 d3 de 02 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 50 49 89 fc e8 da 88 b8 ff 4d RSP: 0018:ffffc90000bc75b0 EFLAGS: 00000246 RAX: 1ffff92000178f41 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88810c85e2c0 RSI: 0000000000000000 RDI: ffff88810e866880 RBP: ffffc90000bc76f0 R08: ffffffff81b24966 R09: fffffbfff0c0d461 R10: fffffbfff0c0d461 R11: 1ffffffff0c0d460 R12: ffffc90000bc7670 R13: ffffc90000bc7a00 R14: dffffc0000000000 R15: 1ffff92000178ec8 walk_component+0x33b/0x5a0 fs/namei.c:1946 link_path_walk+0x5e7/0xc40 fs/namei.c:2259 path_lookupat+0xab/0x460 fs/namei.c:2412 filename_lookup+0x23f/0x6c0 fs/namei.c:2446 user_path_at_empty+0x40/0x50 fs/namei.c:2726 user_path_at include/linux/namei.h:59 [inline] vfs_statx+0x116/0x3f0 fs/stat.c:193 vfs_fstatat fs/stat.c:215 [inline] __do_sys_newfstatat fs/stat.c:384 [inline] __se_sys_newfstatat+0xc8/0x780 fs/stat.c:378 __x64_sys_newfstatat+0x9b/0xb0 fs/stat.c:378 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f5034fe41da Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 69 fc 0c 00 f7 RSP: 002b:00007fff45f4b2b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 0000559eedfe8850 RCX: 00007f5034fe41da RDX: 00007fff45f4b2c8 RSI: 00007fff45f4b758 RDI: 00000000ffffff9c RBP: 00007fff45f4b358 R08: 0000000000000000 R09: 0000559eedfda1d0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff45f4b758 R13: 00007fff45f4b2c8 R14: 0000559eedfaf2c0 R15: 0000000000000000 Modules linked in: ---[ end trace 676ba25a5c410be4 ]--- RIP: 0010:__list_add_valid+0xc6/0xd0 lib/list_debug.c:26 Code: 48 c7 c7 40 de 43 85 4c 89 e6 4c 89 f1 31 c0 e8 8d 10 40 02 0f 0b 48 c7 c7 00 df 43 85 4c 89 f6 4c 89 e1 31 c0 e8 77 10 40 02 <0f> 0b 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 54 53 49 RSP: 0018:ffffc90000007a00 EFLAGS: 00010046 RAX: 0000000000000075 RBX: ffff8881f725c068 RCX: bb7b7fc54d456a00 RDX: 0000000000000101 RSI: 0000000000000101 RDI: 0000000000000000 RBP: ffffc90000007a28 R08: ffffffff8153b2f8 R09: ffffed103ee44e83 R10: ffffed103ee44e83 R11: 1ffff1103ee44e82 R12: ffff88810fa85c70 R13: dffffc0000000000 R14: ffff8881f725c060 R15: ffff88810fa85c70 FS: 00007f5034e8d840(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00077b000 CR3: 000000010cca9000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 08 4c 89 ff or %cl,-0x1(%rcx,%rcx,4) 4: e8 40 4f f2 ff callq 0xfff24f49 9: 41 80 4f 02 01 orb $0x1,0x2(%r15) e: 4c 89 f7 mov %r14,%rdi 11: e8 73 d3 de 02 callq 0x2ded389 16: 5b pop %rbx 17: 41 5c pop %r12 19: 41 5d pop %r13 1b: 41 5e pop %r14 1d: 41 5f pop %r15 1f: 5d pop %rbp 20: c3 retq 21: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 28: 00 29: 55 push %rbp * 2a: 48 89 e5 mov %rsp,%rbp <-- trapping instruction 2d: 41 57 push %r15 2f: 41 56 push %r14 31: 41 55 push %r13 33: 41 54 push %r12 35: 53 push %rbx 36: 50 push %rax 37: 49 89 fc mov %rdi,%r12 3a: e8 da 88 b8 ff callq 0xffb88919 3f: 4d rex.WRB