syzbot


INFO: rcu detected stall in security_file_ioctl

Status: closed as invalid on 2019/12/04 14:04
Subsystems: kernel
[Documentation on labels]
First crash: 1693d, last: 1691d
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in security_file_ioctl (2) kernel 6 1657d 1657d 0/27 closed as invalid on 2020/01/08 05:23
upstream INFO: rcu detected stall in security_file_ioctl (7) mm 1 245d 245d 0/27 auto-obsoleted due to no activity on 2024/02/17 10:34
upstream INFO: rcu detected stall in security_file_ioctl (4) tomoyo 1 1467d 1467d 0/27 auto-closed as invalid on 2020/10/13 12:41
linux-5.15 INFO: rcu detected stall in security_file_ioctl 1 26d 26d 0/3 upstream: reported on 2024/06/25 09:44
upstream INFO: rcu detected stall in security_file_ioctl (8) tomoyo C error 8 20d 59d 0/27 upstream: reported C repro on 2024/05/23 11:49
upstream INFO: rcu detected stall in security_file_ioctl (6) kernel 1 818d 818d 0/27 auto-closed as invalid on 2022/06/24 22:52
linux-6.1 INFO: rcu detected stall in security_file_ioctl origin:upstream C 1 15d 152d 0/3 upstream: reported C repro on 2024/02/20 18:28
upstream INFO: rcu detected stall in security_file_ioctl (3) kernel 4 1656d 1656d 0/27 closed as invalid on 2020/01/09 08:13
upstream INFO: rcu detected stall in security_file_ioctl (5) tomoyo 9 914d 1153d 0/27 closed as invalid on 2022/02/08 10:00

Sample crash report:
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=4b2/1/0x4000000000000002 softirq=10716/10721 fqs=21 
	(t=10501 jiffies g=5957 q=527)
rcu: rcu_preempt kthread starved for 10460 jiffies! g5957 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29032    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3385 [inline]
 __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081
 schedule+0x181/0x210 kernel/sched/core.c:4155
 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
 rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 8112 Comm: syz-executor.5 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq+0xe25/0x1ad0 kernel/rcu/tree.c:2271
 update_process_times+0x12d/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:167 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:free_thread_stack+0x13d/0x590 kernel/fork.c:280
Code: 00 00 e8 f6 9e 60 00 e9 5d 04 00 00 e8 dc 2a 2e 00 48 89 df 31 f6 e8 a2 a1 6e 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 43 a0 69 00 <49> 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08
RSP: 0018:ffffc900021b7a48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffffea00027fa280 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00027fa280
RBP: ffffc900021b7a80 R08: 000000000003a728 R09: ffffed1012a652d7
R10: ffffed1012a652d7 R11: 0000000000000000 R12: ffff88806c470920
R13: dffffc0000000000 R14: 1ffff1100d88e124 R15: ffff8880953296a8
 release_task_stack kernel/fork.c:440 [inline]
 put_task_stack+0xa3/0x130 kernel/fork.c:451
 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256
 context_switch kernel/sched/core.c:3388 [inline]
 __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081
 preempt_schedule_irq+0xc1/0x140 kernel/sched/core.c:4338
 retint_kernel+0x1b/0x2b
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:kfree+0x1a3/0x200 mm/slab.c:3758
Code: 48 83 3d 77 1b 59 07 00 74 68 4c 89 f7 57 9d 0f 1f 44 00 00 eb 19 e8 2c b9 ca ff 48 83 3d 5c 1b 59 07 00 74 51 4c 89 f7 57 9d <0f> 1f 44 00 00 5b 41 5c 41 5e 41 5f 5d c3 48 ff c9 48 89 c8 e9 c8
RSP: 0018:ffffc900021b7c90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02
RAX: ffff888097758894 RBX: ffff8880aa800380 RCX: ffff888097758000
RDX: 0000000000000000 RSI: ffffffff83554d91 RDI: 0000000000000286
RBP: ffffc900021b7cb0 R08: ffff888097758858 R09: ffffc900021b7a7c
R10: 0000000000000009 R11: 0000000000000000 R12: ffff8880a700b400
R13: dffffc0000000000 R14: 0000000000000286 R15: ffffffff83554d91
 tomoyo_path_number_perm+0x4e1/0x640 security/tomoyo/file.c:736
 tomoyo_file_ioctl+0x23/0x30 security/tomoyo/tomoyo.c:335
 security_file_ioctl+0x6d/0xd0 security/security.c:1409
 ksys_ioctl fs/ioctl.c:747 [inline]
 __do_sys_ioctl fs/ioctl.c:756 [inline]
 __se_sys_ioctl fs/ioctl.c:754 [inline]
 __x64_sys_ioctl+0xa3/0x120 fs/ioctl.c:754
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a4e7
Code: 48 83 c4 08 48 89 d8 5b 5d c3 66 0f 1f 84 00 00 00 00 00 48 89 e8 48 f7 d8 48 39 c3 0f 92 c0 eb 92 66 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff30893008 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045a4e7
RDX: 00007fff30893010 RSI: 0000000000008933 RDI: 0000000000000004
RBP: 00007fff30893460 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff30893460
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/12/04 09:53 upstream 63de37476ebd 0ecb9746 .config console log report ci-upstream-kasan-gce-smack-root
2019/12/04 08:20 upstream 63de37476ebd 0ecb9746 .config console log report ci-upstream-kasan-gce-smack-root
2019/12/04 05:58 upstream 76bb8b05960c ae13a849 .config console log report ci-upstream-kasan-gce-smack-root
2019/12/04 05:27 upstream 76bb8b05960c ae13a849 .config console log report ci-upstream-kasan-gce-smack-root
2019/12/03 12:49 upstream 76bb8b05960c ab342da3 .config console log report ci-upstream-kasan-gce-smack-root
2019/12/03 05:53 upstream 596cf45cbf6e ab342da3 .config console log report ci-upstream-kasan-gce-smack-root
2019/12/02 23:27 upstream 596cf45cbf6e ab342da3 .config console log report ci-upstream-kasan-gce-smack-root
* Struck through repros no longer work on HEAD.