INFO: rcu detected stall in sys_mmap (3)

Status: upstream: reported C repro on 2024/11/25 13:27
Subsystems: mm
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+4c456547958bb6d24648@syzkaller.appspotmail.com
First crash: 888d, last: 13d
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
✨ AI-generated root cause summary:

The taprio packet scheduler (net/sched/sch_taprio.c) uses an hrtimer (advance_timer) with callback advance_sched() to advance schedule entries. When configured with a clock that can be stepped (such as CLOCK_REALTIME), advancing the system time forward (e.g., via clock_settime()) causes the hrtimer clock base current time to jump far ahead of the timer's expiration time. In advance_sched(), the timer's next expiration (end_time) is only incremented by one schedule entry interval or cycle at a time before returning HRTIMER_RESTART. Because the new expiration remains far in the past relative to the current time, __hrtimer_run_queues() immediately runs the callback again in a tight, unbounded loop in hardirq context with interrupts disabled, leading to a CPU hard lockup and RCU stall.

▶ ▼ ✨ Full AI root cause analysis
Based on kernel commit 9f16d5e6f220:

Root Cause Analysis

1. Involved Components

  • Source File: net/sched/sch_taprio.c (called via kernel/time/hrtimer.c)
  • Functions: advance_sched(), taprio_change(), taprio_parse_clockid(), __run_hrtimer(), __hrtimer_run_queues(), hrtimer_interrupt()
  • Structures and Fields:
    • struct taprio_sched: advance_timer, clockid, current_entry, oper_sched
    • struct sched_gate_list: cycle_time, cycle_end_time, entries
    • struct sched_entry: interval, end_time
    • struct hrtimer_cpu_base / struct hrtimer_clock_base: lock, active, offset

2. Technical Mechanism

  1. Taprio Clock Configuration: The taprio (Time Aware Priority) qdisc allows userspace to configure a clock source for traffic gate scheduling via the TCA_TAPRIO_ATTR_SCHED_CLOCKID netlink attribute (taprio_parse_clockid() in net/sched/sch_taprio.c). Supported clocks include steppable clocks such as CLOCK_REALTIME. In software mode, taprio initializes an hrtimer (q->advance_timer) tied to this clock with callback function advance_sched().

  2. System Clock Step: When the chosen clock is stepped forward (e.g., by userspace executing clock_settime(CLOCK_REALTIME, ...) or an NTP/PTP step), the clock offset in the corresponding hrtimer base (HRTIMER_BASE_REALTIME) jumps forward by the stepped delta (in the syzkaller reproducer, jumping by several years).

  3. Timer Expiration in hrtimer_interrupt(): On the next local APIC timer interrupt, hrtimer_interrupt() invokes __hrtimer_run_queues(), computing the base's current time:

    basenow = ktime_add(now, base->offset);

    Because base->offset jumped into the future, basenow is now far ahead of q->advance_timer's programmed expiration time.

  4. Flawed Periodic Expiration Advancement: __hrtimer_run_queues() pops q->advance_timer from base->active and calls __run_hrtimer(), which executes the callback advance_sched():

    static enum hrtimer_restart advance_sched(struct hrtimer *timer)
{
    ...
    if (should_restart_cycle(oper, entry)) {
        next = list_first_entry(&oper->entries, struct sched_entry, list);
        oper->cycle_end_time = ktime_add_ns(oper->cycle_end_time, oper->cycle_time);
    } else {
        next = list_next_entry(entry, list);
    }

    end_time = ktime_add_ns(entry->end_time, next->interval);
    end_time = min_t(ktime_t, end_time, oper->cycle_end_time);
    ...
    next->end_time = end_time;
    ...
    hrtimer_set_expires(&q->advance_timer, end_time);
    ...
    return HRTIMER_RESTART;
}

    Unlike standard periodic hrtimer callbacks that use hrtimer_forward() or hrtimer_forward_now() to fast-forward past the current time in $O(1)$ time via division, advance_sched() unconditionally advances the schedule by only a single entry's interval (next->interval) or cycle at a time before returning HRTIMER_RESTART.

  5. Unbounded Loop in Hardirq Context: Upon returning HRTIMER_RESTART, __run_hrtimer() re-enqueues q->advance_timer at the newly set end_time. Control returns to the while ((node = timerqueue_getnext(&base->active))) loop in __hrtimer_run_queues():

    if (basenow < hrtimer_get_softexpires_tv64(timer))
    break;

__run_hrtimer(cpu_base, base, timer, &basenow, flags);

    Because end_time is still in the past relative to basenow, basenow < hrtimer_get_softexpires_tv64(timer) evaluates to false. The loop immediately runs advance_sched() again.

    This results in an unbounded loop inside hardirq context with local interrupts disabled, stepping through millions or billions of cycles to catch up to basenow. The CPU remains trapped in hrtimer_interrupt() (repeatedly unlocking, running advance_sched(), and relocking cpu_base->lock in __run_hrtimer()), preventing all other interrupt handling and task scheduling until an RCU CPU stall / watchdog NMI is triggered.

▶ ▼ ✨ AI Jobs (10)
ID Workflow Result Correct Bug Created Started Finished Revision
77c0a03e assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ FuzzingArtifact: ❌ MemoryCorruption: ❌ NetworkNeedsSetup: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: rcu detected stall in sys_mmap (3) 2026/11/05 14:35 2026/11/05 14:35 2026/11/05 15:41 5cecaf1f
e154ba1c assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/10/05 16:37 2026/10/05 16:37 2026/10/05 16:54 1995e6c7
073bda42 assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/09/04 11:50 2026/09/04 11:50 2026/09/04 12:13 801f0966
33cf5fe8 assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/08/05 00:07 2026/08/05 00:07 2026/08/05 00:07 d4abbeac
76e0a206 assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/07/05 09:16 2026/07/05 09:16 2026/07/05 09:46 93f57954
768dd728 assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/06/18 08:52 2026/06/18 08:52 2026/06/18 09:17 b62b3ded
cdfd782c assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/06/10 04:37 2026/06/10 04:37 2026/06/10 05:08 c36c07f6
4514cb0b assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/06/04 08:01 2026/06/04 08:01 2026/06/04 08:18 62fe1528
7e1b3d1f assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/06/02 06:02 2026/06/02 06:02 2026/06/02 06:33 1095583b
6d7920e9 assessment-security 💥 INFO: rcu detected stall in sys_mmap (3) 2026/05/22 18:55 2026/05/22 18:55 2026/05/22 19:13 df8ac09c
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [mm?] INFO: rcu detected stall in sys_mmap (3) 0 (1) 2024/11/25 13:27
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 INFO: rcu detected stall in sys_mmap 1 1 779d 779d 0/3 auto-obsoleted due to no activity on 2025/01/02 00:33
upstream INFO: rcu detected stall in sys_mmap (2) mm kasan 1 4 1074d 1177d 0/29 auto-obsoleted due to no activity on 2024/03/03 09:59
upstream INFO: rcu detected stall in sys_mmap mm 1 1 2535d 2535d 0/29 closed as invalid on 2019/12/04 14:04
linux-5.15 BUG: soft lockup in sys_mmap 1 1 444d 444d 0/3 auto-obsoleted due to no activity on 2025/12/03 05:34
▶ ▼ Last patch testing requests (7)
Created Duration User Patch Repo Result
2026/10/10 05:24 2h32m retest repro upstream report job log log
2026/07/27 03:31 1h05m retest repro upstream log
2026/05/12 05:50 44m retest repro upstream report log
2026/05/12 05:42 42m retest repro upstream report log
2026/01/31 08:55 19m retest repro upstream report log
2025/03/05 10:25 35m retest repro upstream report log
2024/12/25 09:42 25m retest repro upstream report log
▶ ▼ Fix bisection attempts (6)
Created Duration User Patch Repo Result
2026/03/03 04:58 2m bisect fix upstream error job log
2025/09/26 00:55 3h39m bisect fix upstream OK (0) job log log
2025/08/14 00:54 3h45m bisect fix upstream OK (0) job log log
2025/06/23 19:34 2h19m bisect fix upstream OK (0) job log log
2025/05/20 05:09 3h57m bisect fix upstream OK (0) job log log
2025/03/23 10:05 2h23m bisect fix upstream OK (0) job log log

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (1 GPs behind) idle=61ac/1/0x4000000000000000 softirq=11463/11464 fqs=2100
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0            0   ==> 52500(ms)
rcu: 	(detected by 1, t=10505 jiffies, g=4921, q=654 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5856 Comm: syz-executor211 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:107 [inline]
RIP: 0010:raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2170 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock+0x131/0x2c0 kernel/locking/spinlock_debug.c:116
Code: 00 00 48 89 df be 04 00 00 00 c7 44 24 28 00 00 00 00 e8 d2 be 85 00 be 04 00 00 00 48 8d 7c 24 28 e8 c3 be 85 00 8b 44 24 28 <ba> 01 00 00 00 89 44 24 04 f0 0f b1 13 0f 85 95 00 00 00 65 44 8b
RSP: 0018:ffffc90000007d98 EFLAGS: 00000097
RAX: 0000000000000000 RBX: ffff8880b862ca00 RCX: ffffffff816be07d
RDX: fffff52000000fb8 RSI: 0000000000000004 RDI: ffffc90000007dc0
RBP: 1ffff92000000fb4 R08: 0000000000000001 R09: fffff52000000fb8
R10: 0000000000000003 R11: 0000000000000005 R12: ffff8880b862ca08
R13: ffff8880b862ca10 R14: ffff8880b862ca00 R15: ffffffff8931b920
FS:  00007fd30f46c6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd30f46cd58 CR3: 000000007b330000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1743 [inline]
 __hrtimer_run_queues+0x2be/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire.part.0+0x155/0x380 kernel/locking/lockdep.c:5814
Code: b8 ff ff ff ff 65 0f c1 05 d0 16 97 7e 83 f8 01 0f 85 d0 01 00 00 9c 58 f6 c4 02 0f 85 e5 01 00 00 48 85 ed 0f 85 b6 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7
RSP: 0018:ffffc9000362f510 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 1ffff920006c5ea3 RCX: ffffffff816a7e9e
RDX: 0000000000000001 RSI: ffffffff8b6ce1e0 RDI: ffffffff8bd0e980
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff2dc9398
R10: ffffffff96e49cc7 R11: 0000000000000004 R12: 0000000000000000
R13: ffff888074629b58 R14: 0000000000000000 R15: 0000000000000000
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 __pte_offset_map_lock+0xf1/0x300 mm/pgtable-generic.c:402
 pte_offset_map_lock include/linux/mm.h:3025 [inline]
 filemap_map_pages+0x35c/0x16b0 mm/filemap.c:3656
 do_fault_around mm/memory.c:5280 [inline]
 do_read_fault mm/memory.c:5313 [inline]
 do_fault mm/memory.c:5456 [inline]
 do_pte_missing+0xdab/0x3e70 mm/memory.c:3979
 handle_pte_fault mm/memory.c:5801 [inline]
 __handle_mm_fault+0x103c/0x2a40 mm/memory.c:5944
 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6112
 faultin_page mm/gup.c:1187 [inline]
 __get_user_pages+0x8d9/0x3b50 mm/gup.c:1485
 populate_vma_page_range+0x27f/0x3a0 mm/gup.c:1923
 __mm_populate+0x1d6/0x380 mm/gup.c:2026
 mm_populate include/linux/mm.h:3385 [inline]
 vm_mmap_pgoff+0x293/0x360 mm/util.c:593
 ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:542
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd30f4d6e89
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 1a 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd30f46c208 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fd30f561418 RCX: 00007fd30f4d6e89
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007fd30f561410 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 00007fd30f56141c
R13: 00007fd30f52d87c R14: 0000000800000003 R15: b635773f06ebbeee
 </TASK>

Crashes (71):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/25 08:01 upstream 9f16d5e6f220 68da6d95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/10/29 22:05 upstream c339f4010dea b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/08/24 01:35 upstream 4352b8aee980 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/07/29 22:58 upstream fc02acf6ac0c cb1587ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/07/27 15:27 upstream f5098b6bae76 4cb2b096 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/07/13 00:20 upstream 44696aa3a489 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/07/12 22:53 upstream 44696aa3a489 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/07/10 08:50 upstream 2c7c88a412aa 4167ee25 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/07/03 00:20 upstream 4a50a141f05a 2b70b115 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/04/27 23:56 upstream 254f49634ee1 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/04/15 04:52 upstream 883af1f8e878 e2e976a8 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/04/05 10:43 upstream 3aae9383f42f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/04/05 05:53 upstream 3aae9383f42f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/03/22 05:06 upstream 113ae7b4decc 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/03/19 21:38 upstream 8a30aeb0d1b4 bd6dcb30 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/03/12 02:40 upstream b29fb8829bff 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/03/07 21:17 upstream 03dcad79eec3 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/03/03 21:37 upstream af4e9ef3d784 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/03/03 13:21 upstream af4e9ef3d784 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/02/01 04:57 upstream 162b42445b58 6b8752f2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/01/17 01:38 upstream 983d014aafb1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/01/13 16:07 upstream b71e635feefc d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/01/07 17:42 upstream f0b9d8eb98df d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/01/05 13:15 upstream 3609fa95fb0f d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/01/02 05:56 upstream b69053dd3ffb d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2026/01/01 18:43 upstream b69053dd3ffb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/31 18:41 upstream c8ebd433459b d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/26 20:05 upstream ccd1cdca5cd4 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/26 13:25 upstream ccd1cdca5cd4 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/16 02:19 upstream 8f0b4cce4481 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/12 02:13 upstream d358e5254674 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/10 21:18 upstream 0048fbb4011e d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/12/08 14:53 upstream c2f2b01b74be d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/08 07:02 upstream 67a454e6b1c6 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/07 16:20 upstream 37bb2e7217b0 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/12/03 18:45 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/11/30 03:15 upstream 6bda50f4333f d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/11/29 07:07 upstream 19eef1d98eed d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/11/23 03:17 upstream 89edd36fd801 4fb8ef37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/11/18 01:54 upstream e7c375b18160 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/11/17 05:59 upstream 6a23ae0a96a6 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/11/16 05:30 upstream f824272b6e3f f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/11/07 19:07 upstream 4a0c9b339199 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/10/22 15:04 upstream 552c50713f27 252fbbad .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/10/12 05:38 upstream 98906f9d850e ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/10/10 08:20 upstream 5472d60c129f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/08/21 11:30 upstream 41cd3fd15263 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/07/12 03:42 upstream 40f92e79b0aa 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_mmap
2025/04/19 16:08 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/02/18 23:28 upstream 6537cfb395f3 9a14138f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/02/08 02:40 upstream 7ee983c850b4 a4f327c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2025/01/19 11:42 upstream fda5e3f28400 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/12/27 07:36 upstream d6ef8b40d075 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/12/26 11:50 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/12/11 06:04 upstream f92f4749861b cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/12/04 13:23 upstream ceb8bf2ceaa7 b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/12/02 00:08 upstream bcc8eda6d349 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/11/29 23:36 upstream 509f806f7f70 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/11/25 09:42 upstream 9f16d5e6f220 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/11/24 02:36 upstream 228a1157fb9f 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/11/17 18:49 upstream 4a5df3796467 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/08/24 18:55 upstream d2bafcf224f3 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/08/15 02:39 upstream 9d5906799f7d e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/08/14 07:02 upstream 6b0f8db921ab bde81f6f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/07/27 07:36 upstream 2f8c4f506285 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/06/30 07:50 upstream 8282d5af7be8 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/06/10 06:17 upstream b8481381d4e2 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2024/06/06 18:49 upstream 2df0193e62cf 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_mmap
2026/08/16 04:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: rcu detected stall in sys_mmap
2026/05/13 00:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5cbb61bf4168 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: rcu detected stall in sys_mmap
2025/05/22 05:19 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 187899f4124a 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: rcu detected stall in sys_mmap
* Struck through repros no longer work on HEAD.