On Wed, 6 Sep 2023 19:56:52 +0530 Naresh Kamboju naresh.kamboju@linaro.org 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.
[..]
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: