On Tue, Dec 03, 2019 at 07:40:52AM +0100, Greg KH wrote: > On Tue, Dec 03, 2019 at 11:55:03AM +0530, Amol Grover wrote: > > Compiled, Booted, however I'm getting the following errors when running > > "make kselftest" > > > > sudo dmesg -l alert > > > > [34381.903893] BUG: kernel NULL pointer dereference, address: 0000000000000008 > > [34381.903904] #PF: supervisor read access in kernel mode > > [34381.903908] #PF: error_code(0x0000) - not-present page > > Which test causes this problem? IIRC I didn't run make kselftest with summary=1 option. Is there any other way to get that information? The logs that kselftest generated also don't seem to help in this. > > ANd is it new in 5.3.13? > I previously ran kselftest on 5.4-rc7 and 5.3.9 (default kernel shipped by openSUSE), both were fine. However, a bit of backstory: A day ago I used kselftest from the linux/next branch and ran it (w/o sudo). It showed me the exact same error. However, I was running a modified version of 5.3.13, but those modifications were actually trivial (5 lines changed) and shouldn't have resulted in this kernel error. So, I switched to the vanilla 5.3.13 and ran kselftest (w/o sudo) again. I ran it 3 times (w/o any errors), switched back to the modified kernel and ran kselftest (w/o root) 2 more times and everything was fine. Then I decided to test the vanilla one again for the 4th time, but this time I ran kselftest as root where this BUG popped again. Thanks Amol > thanks, > > greg k-h
