On Wed, 6 Sep 2023 19:56:52 +0530 Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote: > [my two cents] > > I do see similar kernel panic while running ftrace testing on today's > Linux next-20230906 tag. This crash is from qemu-arm64. > > Here I am providing steps to reproduced link and scripts by using tuxrun tool. > - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2V0OqxEZUXIPNqWhQnnsuFOGYxR/reproducer > [..] > Log details, > ------------- > # ok 45 ftrace - test tracing error log support > <47>[ 1373.662292] systemd-journald[90]: Sent WATCHDOG=1 notification. > # ok 46 Test creation and deletion of trace instances while setting an event It's definitely a race with the creation and deletion of instances. I'm going to run it on my laptop VM and see if that reproduces it. My other VM is on a pretty powerful machine, and perhaps that's keeping it from hitting the race. -- Steve > <1>[ 1382.873224] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030 > <1>[ 1382.873223] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030 > <1>[ 1382.873426] Mem abort info:
