LTP's zram02.sh script can be used to crah your kernel pretty badly. cd testcases/kernel/device-drivers/zram while true; do PATH=$PATH:$PWD:$PWD/../../../lib/ ./zram02.sh; done
This won't do much, however if you run this in two separate windows you'll see the kernel become unhappy quite fast. The crux of this issue was mishandling of cpu hotplug multistate on the zram driver in consideration for driver unload. However there was still another long lasting bug present: races with sysfs attributes and driver unload. This series fixes these issues. [0] https://github.com/linux-test-project/ltp.git Luis Chamberlain (2): zram: fix crashes due to use of cpu hotplug multistate zram: fix races of sysfs attribute removal and usage drivers/block/zram/zram_drv.c | 82 +++++++++++++++++++++++++++++++---- 1 file changed, 74 insertions(+), 8 deletions(-) -- 2.30.1
