Title | Replies (including bot) | Last reply |
---|---|---|
[syzbot] [mm?] INFO: rcu detected stall in kcompactd (2) | 2 (5) | 2024/06/01 09:34 |
syzbot |
sign-in | mailing list | source | docs |
🐞 Open [1269] ≡ Subsystems 🐞 Fixed [5427] 🐞 Invalid [12861] ⬇ Missing Backports [106] 📈 Kernel Health 📈 Bugs/Month 📈 Bug Lifetimes 📈 Fuzzing 📈 Crashes 📈 Coverage | 💬 Send us feedback |
Title | Replies (including bot) | Last reply |
---|---|---|
[syzbot] [mm?] INFO: rcu detected stall in kcompactd (2) | 2 (5) | 2024/06/01 09:34 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | INFO: rcu detected stall in kcompactd mm | 1 | 318d | 318d | 0/27 | auto-obsoleted due to no activity on 2023/11/10 08:17 | |||
linux-6.1 | INFO: rcu detected stall in kcompactd | 1 | 14d | 14d | 0/3 | upstream: reported on 2024/06/11 19:09 | |||
upstream | BUG: soft lockup in kcompactd kvm | 1 | 966d | 962d | 0/27 | auto-closed as invalid on 2022/01/31 12:36 |
Created | Duration | User | Patch | Repo | Result |
---|---|---|---|---|---|
2024/06/11 18:32 | 23m | retest repro | upstream | report log | |
2024/06/01 09:07 | 22m | hdanton@sina.com | patch | https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master | report log |
2024/06/01 07:01 | 25m | hdanton@sina.com | patch | https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master | error OK |
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=9993, q=77 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 1800 (4294972632-4294970832), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 1800 jiffies! g9993 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 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:R running task stack:27680 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6924 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194 rcu_gp_fqs_loop+0x217/0xb00 kernel/rcu/tree.c:2000 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> rcu: Stack dump where RCU GP kthread last ran: CPU: 1 PID: 34 Comm: kcompactd0 Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 26 68 80 f6 48 89 df e8 0e e5 80 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 25 27 72 f6 65 8b 05 b6 86 18 75 85 c0 74 16 5b RSP: 0018:ffffc90000a18248 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffffffff94ca7948 RCX: 1ffffffff2857134 RDX: 0000000000000000 RSI: ffffffff8b2cade0 RDI: ffffffff8b8fffc0 RBP: 0000000000000286 R08: 0000000000000001 R09: fffffbfff284d670 R10: ffffffff9426b387 R11: 0000000000000002 R12: ffffffff94ca7940 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888059c72800 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff8f455d78 CR3: 0000000049512000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> __debug_check_no_obj_freed lib/debugobjects.c:998 [inline] debug_check_no_obj_freed+0x328/0x600 lib/debugobjects.c:1019 slab_free_hook mm/slub.c:2162 [inline] slab_free mm/slub.c:4436 [inline] kfree+0x284/0x3b0 mm/slub.c:4557 ieee80211_inform_bss+0x76e/0x1140 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0x893/0x1f70 net/wireless/scan.c:2277 cfg80211_inform_bss_data+0x205/0x39d0 net/wireless/scan.c:3101 cfg80211_inform_bss_frame_data+0x271/0x7c0 net/wireless/scan.c:3191 ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x47c/0xad0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5222 [inline] ieee80211_rx_list+0x1be1/0x2e90 net/mac80211/rx.c:5459 ieee80211_rx_napi+0xdd/0x400 net/mac80211/rx.c:5482 ieee80211_rx include/net/mac80211.h:5093 [inline] ieee80211_tasklet_handler+0xd6/0x130 net/mac80211/main.c:438 tasklet_action_common.constprop.0+0x24c/0x3e0 kernel/softirq.c:785 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:free_object lib/debugobjects.c:423 [inline] RIP: 0010:debug_object_free+0x294/0x500 lib/debugobjects.c:866 Code: 4d 89 6c 24 08 48 8b 7c 24 10 48 89 ce 48 b8 00 01 00 00 00 00 ad de 48 89 03 48 83 c0 22 48 89 43 08 e8 ff 6b 61 06 48 89 df <e8> e7 d0 ff ff 0f b6 05 e0 df 3f 10 84 c0 0f 85 13 fe ff ff 8b 05 RSP: 0018:ffffc90000aa7bb0 EFLAGS: 00000286 RAX: 0000000080000000 RBX: ffff88805aa2d070 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff8b2cade0 RDI: ffff88805aa2d070 RBP: ffffc90000aa7ca0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8fe45e57 R11: 0000000000000000 R12: ffff888021d9be00 R13: ffffffff94d302d8 R14: ffffc90000aa7cd0 R15: 1ffff92000154f7a destroy_timer_on_stack kernel/time/timer.c:866 [inline] schedule_timeout+0x14f/0x2a0 kernel/time/timer.c:2585 kcompactd+0xad3/0xde0 mm/compaction.c:3199 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/05/28 03:05 | upstream | 2bfcfd584ff5 | f550015e | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: rcu detected stall in kcompactd | |
2024/05/28 17:14 | upstream | 2bfcfd584ff5 | 34889ee3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: rcu detected stall in kcompactd | ||
2024/05/23 01:00 | linux-next | 124cfbcd6d18 | 4d098039 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: rcu detected stall in kcompactd |