Yunseong Kim yskzalloc
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yskzalloc
/ PREEMPT_RT-hardlockup.log
Created
July 25, 2025 00:05
https://lore.kernel.org/linux-rt-devel/20250610080307.LMm1hleC@linutronix.de/ ``` $ git remote add rt-devel git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git $ git checkout v6.16-rc1-rt1 ``` Arm64 Server - RADXA Orion6 - Armv9.2 Architecture
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| 📃 coverage | |
| 🤖 syscalls | |
| 🛒 corpus | |
| 💻 VMs | |
| 🔧 config | |
| Kernel panic - not syncing: Hard LOCKUP | |
| CPU: 1 UID: 0 PID: 9003 Comm: systemd-rfkill Tainted: G W 6.16.0-rc1-rt1 #11 PREEMPT_RT | |
| Tainted: [W]=WARN |
yskzalloc
/ PREEMPT_RT-perf-soft-lockup.log
Created
July 25, 2025 00:00
https://lore.kernel.org/linux-rt-devel/20250610080307.LMm1hleC@linutronix.de/ ``` $ git remote add rt-devel git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git $ git checkout v6.16-rc1-rt1 ``` Arm64 Server - RADXA Orion6 - Armv9.2 Architecture - Quad Big Cortex®-A720 Up to 2.6GHz - Quad Medium Cortex®-A720 Up to 2.4GHz - Quad Lit…
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| perf lockup | |
| watchdog: BUG: soft lockup - CPU#2 stuck for 23s! [syz.1.915:10188] | |
| CPU#2 Utilization every 4s during lockup: | |
| #1: 100% system, 0% softirq, 0% hardirq, 0% idle | |
| #2: 100% system, 0% softirq, 0% hardirq, 0% idle | |
| #3: 100% system, 0% softirq, 1% hardirq, 0% idle | |
| #4: 100% system, 0% softirq, 0% hardirq, 0% idle | |
| #5: 100% system, 0% softirq, 0% hardirq, 0% idle | |
| Modules linked in: |
yskzalloc
/ perf-disabled-child.c
Last active
July 24, 2025 18:48
Triggers kernel WARN and UBSAN by creating a disabled child perf event in a hardware event group. Link: https://lore.kernel.org/lkml/aIIT7fq3xG9qtRD8@J2N7QTR9R3/
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| /* | |
| * Reproducer by Mark Rutland <mark.rutland@arm.com> | |
| * Triggers kernel WARN and UBSAN with disabled child perf event. | |
| */ | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <unistd.h> | |
| #include <sys/syscall.h> |
yskzalloc
/ kprobe_insn_boundary-stall.txt
Created
June 27, 2024 03:48
scripts/decode_stacktrace.sh /usr/lib/debug/boot/vmlinux-6.8.0-36-generic $HOME/linux-source-6.8.0 < kprobe_insn_boundary-stall.txt
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| rcu: INFO: rcu_sched detected stalls on CPUs/tasks:s: | |
| rcu: | |
| (detected by 0, t=6002 jiffies, g=24353, q=1 ncpus=1)1) | |
| rcu: All QSes seen, last rcu_sched kthread activity 6002 (4294978930-4294972928), jiffies_till_next_fqs=1, root ->qsmask 0x0x0 | |
| rcu: rcu_sched kthread starved for 6002 jiffies! g24353 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0=0 | |
| rcu: | |
| Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior.r. | |
| rcu: RCU grace-period kthread stack dump:p: | |
| task:rcu_sched state:R running task stack:0 pid:16 tgid:16 ppid:2 flags:0x0000000000 | |
| Call Trace:e: |
yskzalloc
/ qdisc-null-ptr-deref.c
Last active
June 21, 2024 16:06
Yun Levi and I submit the Linux kernel patch for fixing the NULL pointer dereference that can occur in perf trace events when using the veth and Bluetooth device. It's twice as fun working on it together! 💪 😎 😎 👍 kernel mailing list: https://lore.kernel.org/all/20240621114551.2061-3-yskelg@gmail.com/ bugzilla: https://bugzilla.redhat.com/show_bu…
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| // autogenerated by syzkaller (https://github.com/google/syzkaller) | |
| #define _GNU_SOURCE | |
| #include <endian.h> | |
| #include <stdint.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <sys/syscall.h> |
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