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Re: [PATCH 1/1] broken perf tool on 4.4-rc1

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On 2016/1/31 5:02, Tong Zhang wrote:
> reproduce:
>    lzto@objd ~ $ ~/linux/tools/perf/perf record -I -e intel_pt/tsc=1,noretcomp=1/u /bin/ls
>    lzto@objd ~ $ ~/linux/tools/perf/perf script  -F event,comm,pid,tid,time,addr,ip,sym,dso,iregs
>    Segmentation fault
>    lzto@objd ~ $
>
> Upon further investigation, it seems that
> commit 747a9b0a08ae ("Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")
> breaks perf tool.
>
> __list_del(): tools/include/linux/list.h does not check null pointer dereference

I don't have a Boradwell system, unable to reproduce the fault.

Could you please give the output of gdb's bt command?

We should try to fix the inappropriate list operation.

Thank you.

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[PATCH 1/1] broken perf tool on 4.4-rc1 Tong Zhang <ztong@vt.edu> - 2016-01-30 22:10 +0100
  Re: [PATCH 1/1] broken perf tool on 4.4-rc1 TongZhang <ztong@vt.edu> - 2016-01-30 22:30 +0100
  Re: [PATCH 1/1] broken perf tool on 4.4-rc1 "Wangnan (F)" <wangnan0@huawei.com> - 2016-02-01 03:20 +0100
    Re: [PATCH 1/1] broken perf tool on 4.4-rc1 "Wangnan (F)" <wangnan0@huawei.com> - 2016-02-01 04:30 +0100

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