Hi Frederic Weisbecker, On 2023-03-17 at 15:09:44 +0100, Frederic Weisbecker wrote: > On Fri, Mar 17, 2023 at 03:48:33PM +0800, Pengfei Xu wrote: > > Hi Frederic Weisbecker and kernel experts, > > > > Platform: x86 platforms > > There is "sys_perf_event_open" soft lockup BUG in v6.3-rc2 kernel in guest. > > I can reproduce with you tests which is based on v6.2-rc5. However when > I forward port your .config to a v6.3-rc2, the issue doesn't trigger anymore. > > Did you manage to reproduce on v6.3-rc2? And if so do you still have the related > .config ? > Ah, I fogot to say: kconfig_origin will be changed after "make olddefconfig", there were many items changed in .config after "make olddefconfig" in v6.3-rc2. I used below way to make the .config. 1. Copy the kconfig origin to .config: https://github.com/xupengfe/syzkaller_logs/blob/main/230316_062127_sys_perf_event_open/kconfig_origin 2. Fogort that the bisect script will change .config: CONFIG_LOCALVERSION="-kvm" -> CONFIG_LOCALVERSION="-eeac8ede1755", seems to have little effect. 3. make olddefconfig // Then .config will be changed in v6.3-rc2 kernel code. Put .config after make olddefconfig in link: https://github.com/xupengfe/syzkaller_logs/blob/main/230316_062127_sys_perf_event_open/kconfig_v6.3-rc2_after_make_olddefconfig 4. make -jx bzImage //x should equal or less than cpu num your pc has Put v6.3-rc2 bzImage in link: https://github.com/xupengfe/syzkaller_logs/blob/main/230316_062127_sys_perf_event_open/bzImage_eeac8ede17557680855031c6f305ece2378af326 And it could be reproduced after maunally test in 150s. v6.3-rc2 reproduced dmesg: https://github.com/xupengfe/syzkaller_logs/blob/main/230316_062127_sys_perf_event_open/v6.3-rc2_perf_related_problem_dmesg.log And it could be reproduced on our ADL-N client x86 PC in guest. Thanks! BR. -Pengfei > Thanks.
