syzbot


WARNING in rcu_core

Status: auto-closed as invalid on 2021/12/26 12:35
Reported-by: syzbot+f2ceae48bb0c0ab08b9d@syzkaller.appspotmail.com
First crash: 465d, last: 465d

Sample crash report:
------------[ cut here ]------------
ODEBUG: active_state not available (active state 0) object type: rcu_head hint: 0x0
WARNING: CPU: 0 PID: 8442 at lib/debugobjects.c:508 debug_print_object lib/debugobjects.c:505 [inline]
WARNING: CPU: 0 PID: 8442 at lib/debugobjects.c:508 debug_object_active_state+0x28a/0x410 lib/debugobjects.c:946
Modules linked in:
CPU: 0 PID: 8442 Comm: syz-executor.2 Not tainted 5.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_print_object lib/debugobjects.c:505 [inline]
RIP: 0010:debug_object_active_state+0x28a/0x410 lib/debugobjects.c:946
Code: e8 fb c6 be fd 4c 8b 45 00 48 c7 c7 c0 a2 93 8a 48 c7 c6 60 9f 93 8a 48 c7 c2 00 a5 93 8a 31 c9 49 89 d9 31 c0 e8 16 58 41 fd <0f> 0b e9 9f 00 00 00 45 31 f6 ff 05 66 bd 9d 0c 43 8a 04 2f 84 c0
RSP: 0018:ffffc90000007ba0 EFLAGS: 00010246
RAX: b9c220867f01ad00 RBX: 0000000000000000 RCX: ffff88801b5b0000
RDX: 0000000080000101 RSI: 0000000080000101 RDI: 0000000000000000
RBP: ffffffff8a304d00 R08: ffffffff81664f72 R09: ffffed1017383f2c
R10: ffffed1017383f2c R11: 0000000000000000 R12: ffff888000137e18
R13: dffffc0000000000 R14: 1ffff11000026fc3 R15: ffff88805ec97ba0
FS:  0000000002131400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000001ffffc00 CR3: 00000000505bb000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 debug_rcu_head_unqueue kernel/rcu/rcu.h:185 [inline]
 rcu_do_batch kernel/rcu/tree.c:2543 [inline]
 rcu_core+0x8a6/0x14b0 kernel/rcu/tree.c:2785
 __do_softirq+0x372/0x783 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x21b/0x260 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:finish_lock_switch+0xf0/0x1c0 kernel/sched/core.c:4436
Code: 61 0c 00 74 11 48 89 df be ff ff ff ff e8 18 33 80 08 85 c0 74 27 4d 85 ff 75 44 4c 89 f7 e8 a7 dd 82 08 e8 f2 40 2d 00 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 4d 85 ff 75 92 eb a8 0f 0b 4d
RSP: 0018:ffffc9000167fa30 EFLAGS: 00000282
RAX: b9c220867f01ad00 RBX: ffff8880902a54f4 RCX: ffffffff9070c703
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff1101738a400 R08: ffffffff8186a520 R09: ffffed101738a2a9
R10: ffffed101738a2a9 R11: 0000000000000000 R12: ffff8880b9c52000
R13: dffffc0000000000 R14: ffff8880b9c51540 R15: 0000000000000000
 finish_task_switch+0x140/0x630 kernel/sched/core.c:4553
 context_switch kernel/sched/core.c:4684 [inline]
 __schedule+0xc0f/0x11f0 kernel/sched/core.c:5938
 schedule+0x14b/0x210 kernel/sched/core.c:6017
 freezable_schedule include/linux/freezer.h:172 [inline]
 do_nanosleep+0x1b6/0x7b0 kernel/time/hrtimer.c:1896
 hrtimer_nanosleep+0x239/0x470 kernel/time/hrtimer.c:1949
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline]
 __x64_sys_clock_nanosleep+0x344/0x3d0 kernel/time/posix-timers.c:1245
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x48a7c1
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffe3a1cf3e0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00000000000019ce RCX: 000000000048a7c1
RDX: 00007ffe3a1cf420 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe3a1cf4bc R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000001f8f0a R14: 000000000000000b R15: 00007ffe3a1cf520
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	0c 00                	or     $0x0,%al
   2:	74 11                	je     0x15
   4:	48 89 df             	mov    %rbx,%rdi
   7:	be ff ff ff ff       	mov    $0xffffffff,%esi
   c:	e8 18 33 80 08       	callq  0x8803329
  11:	85 c0                	test   %eax,%eax
  13:	74 27                	je     0x3c
  15:	4d 85 ff             	test   %r15,%r15
  18:	75 44                	jne    0x5e
  1a:	4c 89 f7             	mov    %r14,%rdi
  1d:	e8 a7 dd 82 08       	callq  0x882ddc9
  22:	e8 f2 40 2d 00       	callq  0x2d4119
  27:	fb                   	sti
  28:	5b                   	pop    %rbx
* 29:	41 5c                	pop    %r12 <-- trapping instruction
  2b:	41 5d                	pop    %r13
  2d:	41 5e                	pop    %r14
  2f:	41 5f                	pop    %r15
  31:	5d                   	pop    %rbp
  32:	c3                   	retq
  33:	0f 0b                	ud2
  35:	4d 85 ff             	test   %r15,%r15
  38:	75 92                	jne    0xffffffcc
  3a:	eb a8                	jmp    0xffffffe4
  3c:	0f 0b                	ud2
  3e:	4d                   	rex.WRB

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2021/08/28 12:34 upstream 77dd11439b86 be2c130d .config log report info WARNING in rcu_core
* Struck through repros no longer work on HEAD.