INFO: rcu detected stall in sys_creat

Status: auto-obsoleted due to no activity on 2023/11/30 18:44
Reported-by: syzbot+ee51aa0ec51dd5807eba@syzkaller.appspotmail.com
First crash: 1130d, last: 1130d
▶ ▼ Similar bugs (9)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in sys_creat exfat 1 98 2805d 2896d 0/29 closed as dup on 2019/01/20 01:52
upstream INFO: rcu detected stall in sys_creat (7) fs 1 1 505d 505d 0/29 auto-obsoleted due to no activity on 2025/08/06 22:34
upstream INFO: rcu detected stall in sys_creat (6) cgroups mm 1 1 599d 599d 0/29 auto-obsoleted due to no activity on 2025/05/04 14:13
upstream INFO: rcu detected stall in sys_creat (5) cgroups mm fs 1 2 825d 871d 0/29 auto-obsoleted due to no activity on 2024/08/22 00:53
upstream INFO: rcu detected stall in sys_creat (4) mm cgroups 1 1 1817d 1817d 0/29 auto-closed as invalid on 2021/12/03 06:38
upstream INFO: rcu detected stall in sys_creat (2) mm 1 1 2489d 2488d 0/29 closed as invalid on 2019/12/04 14:04
upstream INFO: rcu detected stall in sys_creat (3) fs 1 1 2259d 2259d 0/29 auto-closed as invalid on 2020/10/17 06:02
linux-5.15 INFO: rcu detected stall in sys_creat 1 1 733d 733d 0/3 auto-obsoleted due to no activity on 2024/12/31 15:05
android-5-15 BUG: soft lockup in sys_creat 1 4 852d 882d 0/2 auto-obsoleted due to no activity on 2024/08/25 01:26

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4087/1:b..l P5768/1:b..l
	(detected by 1, t=10502 jiffies, g=191981, q=21 ncpus=2)
task:syz-executor.4  state:R  running task     stack:24552 pid:5768  ppid:3557   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x132c/0x4330 kernel/sched/core.c:6554
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6866
 irqentry_exit+0x53/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_is_held include/linux/lockdep.h:283 [inline]
RIP: 0010:rcu_read_lock_held+0x2a/0x40 kernel/rcu/update.c:311
Code: 53 e8 0a 3a 13 09 85 c0 74 26 31 db e8 bf 3a 01 00 84 c0 74 20 e8 26 3c 01 00 84 c0 74 17 48 c7 c7 e0 9e 12 8d be ff ff ff ff <5b> e9 70 36 13 09 bb 01 00 00 00 89 d8 5b c3 0f 1f 80 00 00 00 00
RSP: 0018:ffffc9000478f130 EFLAGS: 00000202
RAX: 1ffffffff1a25d01 RBX: 0000000000000000 RCX: 0000000080000000
RDX: ffffc9000b293000 RSI: 00000000ffffffff RDI: ffffffff8d129ee0
RBP: 0000000000000220 R08: ffffffff81eb0a35 R09: fffffbfff2093445
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffea0002227540 R14: ffff8880155c0000 R15: 00000000000889d5
 lookup_page_ext mm/page_ext.c:277 [inline]
 page_ext_get+0x169/0x270 mm/page_ext.c:158
 __page_table_check_zero+0x139/0x4a0 mm/page_table_check.c:140
 page_table_check_free include/linux/page_table_check.h:46 [inline]
 free_pages_prepare mm/page_alloc.c:1461 [inline]
 free_pcp_prepare mm/page_alloc.c:1510 [inline]
 free_unref_page_prepare+0xf73/0x1120 mm/page_alloc.c:3388
 free_unref_page_list+0x107/0x810 mm/page_alloc.c:3530
 release_pages+0x2836/0x2b40 mm/swap.c:1055
 __pagevec_release+0x80/0xf0 mm/swap.c:1075
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 truncate_inode_pages_range+0x48a/0x1340 mm/truncate.c:373
 truncate_inode_pages mm/truncate.c:452 [inline]
 truncate_pagecache+0x68/0x80 mm/truncate.c:753
 ext4_setattr+0xfb2/0x1a00 fs/ext4/inode.c:5566
 notify_change+0xdcd/0x1080 fs/attr.c:482
 do_truncate+0x21c/0x300 fs/open.c:65
 handle_truncate fs/namei.c:3216 [inline]
 do_open fs/namei.c:3561 [inline]
 path_openat+0x27e2/0x2e60 fs/namei.c:3714
 do_filp_open+0x230/0x480 fs/namei.c:3741
 do_sys_openat2+0x13b/0x500 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_creat fs/open.c:1410 [inline]
 __se_sys_creat fs/open.c:1404 [inline]
 __x64_sys_creat+0x11f/0x160 fs/open.c:1404
 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+0x63/0xcd
RIP: 0033:0x7f285167cae9
RSP: 002b:00007f285233b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f285179c050 RCX: 00007f285167cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f28516c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f285179c050 R15: 00007ffeadd88918
 </TASK>
task:kworker/u4:17   state:R  running task     stack:22200 pid:4087  ppid:2      flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x132c/0x4330 kernel/sched/core.c:6554
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6866
 irqentry_exit+0x53/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5673
Code: 2b 00 74 08 4c 89 f7 e8 df a2 76 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000ac9f8e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001593f28 RCX: 1ffff92001593ec8
RDX: dffffc0000000000 RSI: ffffffff8aebf3a0 RDI: ffffffff8b3ceae0
RBP: ffffc9000ac9fa40 R08: dffffc0000000000 R09: fffffbfff2093445
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001593f24
R13: dffffc0000000000 R14: ffffc9000ac9f940 R15: 0000000000000246
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:306
 rcu_read_lock include/linux/rcupdate.h:747 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:755 [inline]
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:826 [inline]
 batadv_iv_ogm_schedule+0x425/0x1000 net/batman-adv/bat_iv_ogm.c:869
 batadv_iv_send_outstanding_bat_ogm_packet+0x6fa/0x800 net/batman-adv/bat_iv_ogm.c:1713
 process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2292
 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2439
 kthread+0x26e/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g191981 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=183509
rcu: rcu_preempt kthread starved for 10502 jiffies! g191981 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:26008 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x132c/0x4330 kernel/sched/core.c:6554
 schedule+0xbf/0x180 kernel/sched/core.c:6630
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
 kthread+0x26e/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4810 Comm: kworker/u4:6 Not tainted 6.1.46-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: netns cleanup_net
RIP: 0010:advance_sched+0x3c2/0x940 net/sched/sch_taprio.c:734
Code: 28 8b 03 48 01 c5 48 8b 44 24 08 48 8d 58 28 48 89 d8 48 c1 e8 03 42 80 3c 30 00 4c 8b 64 24 20 74 08 48 89 df e8 ee 19 2a f9 <4c> 8b 3b 4c 39 fd 4c 0f 4c fd 4d 85 e4 0f 84 88 00 00 00 4c 89 f0
RSP: 0018:ffffc90000007cc0 EFLAGS: 00000046
RAX: 1ffff1100fba91a5 RBX: ffff88807dd48d28 RCX: dffffc0000000000
RDX: 0000000080010001 RSI: 0000000000000000 RDI: 188fb626096661c8
RBP: 188fb6268818a710 R08: ffffffff88b6755a R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff11003f2bd95 R14: dffffc0000000000 R15: ffff88807dd48d10
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002029d000 CR3: 0000000032163000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:unwind_next_frame+0x7/0x2220 arch/x86/kernel/unwind_orc.c:423
Code: 41 5f c3 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 95 4c 89 f7 e8 6b 1b a4 00 eb 8b 66 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 <41> 54 53 48 81 ec a8 00 00 00 48 89 fb 49 be 00 00 00 00 00 fc ff
RSP: 0018:ffffc900051bf498 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc900051bf4c0 RCX: ffffffff8fb13000
RDX: dffffc0000000000 RSI: ffffffff810058ef RDI: ffffc900051bf4c0
RBP: ffffc900051bf550 R08: 000000000000000e R09: ffffc900051bf5b0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888073dd3b80
R13: ffffffff8177e6c0 R14: ffffc900051bf5a0 R15: 0000000000000000
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674
 kernfs_put+0x1c1/0x4a0 fs/kernfs/dir.c:553
 kernfs_remove_by_name_ns+0xdc/0x150 fs/kernfs/dir.c:1639
 kernfs_remove_by_name include/linux/kernfs.h:618 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xfa/0x2a0 fs/sysfs/group.c:288
 sysfs_remove_groups+0x50/0xa0 fs/sysfs/group.c:312
 destroy_port drivers/infiniband/core/sysfs.c:1285 [inline]
 ib_free_port_attrs+0x266/0x3d0 drivers/infiniband/core/sysfs.c:1415
 remove_one_compat_dev drivers/infiniband/core/device.c:1002 [inline]
 rdma_dev_exit_net+0x1ef/0x350 drivers/infiniband/core/device.c:1140
 ops_exit_list net/core/net_namespace.c:169 [inline]
 cleanup_net+0x6ce/0xb60 net/core/net_namespace.c:601
 process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2292
 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2439
 kthread+0x26e/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/22 18:43 linux-6.1.y 6c44e13dc284 b81ca3f6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_creat
* Struck through repros no longer work on HEAD.