Re: possible deadlock in __perf_install_in_context

On Mon, Aug 22, 2022 at 09:12:40PM +0800, 王海弛 wrote:

Dear Linux maintainers and reviewers:
We would like to report a linux kernel bug, found by a modified version of syzkaller.
May affected file: arch/x86/events/core.c, include/linux/perf_event.h
Kernel Version: 8fe31e0995f048d16b378b90926793a0aa4af1e5
Kernel Config: see attach, linux.config
Syzkaller Version: 3666edfeb55080ebe138d77417fa96fe2555d6bb
reproducing program: see attach, reproducing.txt (There are syz-reproducing program, C reproducing program and crash report created by syzkaller, both of which can replay the crash)
Feel free to  email us if any other infomations are needed. Hope the provided materials will help finding and fixing the bug.
The full log crash log are as follows:(also in the attach, crash.report)
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unchecked MSR access error: WRMSR to 0x188 (tried to write 0x0000000300530000) at rIP: 0xffffffff810287de (__wrmsr arch/x86/include/asm/msr.h:103 [inline])
unchecked MSR access error: WRMSR to 0x188 (tried to write 0x0000000300530000) at rIP: 0xffffffff810287de (native_write_msr arch/x86/include/asm/msr.h:160 [inline])
unchecked MSR access error: WRMSR to 0x188 (tried to write 0x0000000300530000) at rIP: 0xffffffff810287de (wrmsrl arch/x86/include/asm/msr.h:281 [inline])
unchecked MSR access error: WRMSR to 0x188 (tried to write 0x0000000300530000) at rIP: 0xffffffff810287de (__x86_pmu_enable_event arch/x86/events/intel/../perf_event.h:1120 [inline])
unchecked MSR access error: WRMSR to 0x188 (tried to write 0x0000000300530000) at rIP: 0xffffffff810287de (intel_pmu_enable_event+0x3ce/0xfe0 arch/x86/events/intel/core.c:2693)

I'm guess this is some sort of broken virt setup?