Yunseong Kim kzall0c
🏠
kzall0c
/ kcov-usb-invalid-sleeping.log
Created
July 25, 2025 19:33
PREEPT_RT have BUG from f85d39dd7ed8 ("kcov, usb: disable interrupts in kcov_remote_start_usb_softirq")
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| [ 114.639440][ C1] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 | |
| [ 114.639474][ C1] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 30, name: ksoftirqd/1 | |
| [ 114.639483][ C1] preempt_count: 0, expected: 0 | |
| [ 114.639488][ C1] RCU nest depth: 2, expected: 2 | |
| [ 114.639501][ C1] CPU: 1 UID: 0 PID: 30 Comm: ksoftirqd/1 Tainted: G W 6.16.0-rc1-rt1 #11 PREEMPT_RT | |
| [ 114.639516][ C1] Tainted: [W]=WARN | |
| [ 114.639519][ C1] Hardware name: QEMU KVM Virtual Machine, BIOS 2025.02-8 05/13/2025 | |
| [ 114.639525][ C1] Call trace: | |
| [ 114.639529][ C1] show_stack+0x2c/0x3c (C) | |
| [ 114.639561][ C1] __dump_stack+0x30/0x40 |
kzall0c
/ PREEMPT_RT-hardlockup.log
Created
July 25, 2025 00:05
https://lore.kernel.org/linux-rt-devel/[email protected]/ ``` $ 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
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 📃 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 |
kzall0c
/ PREEMPT_RT-perf-soft-lockup.log
Created
July 25, 2025 00:00
https://lore.kernel.org/linux-rt-devel/[email protected]/ ``` $ 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…
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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: |
kzall0c
/ 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/
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /* | |
| * Reproducer by Mark Rutland <[email protected]> | |
| * Triggers kernel WARN and UBSAN with disabled child perf event. | |
| */ | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <unistd.h> | |
| #include <sys/syscall.h> |
kzall0c
/ 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
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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: |
kzall0c
/ 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/[email protected]/ bugzilla: https://bugzilla.redhat.com/show_bu…
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // 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> |