Re: [PATCH v2] perf c2c: Fix memory leaks on output fields

[Dmitry Ilvokhin]

On Thu, Oct 15, 2026 at 04:32:37PM -0700, Namhyung Kim wrote:
> The perf_hpp_list was not freed after use.  Let's add it for the main
> c2c hists list in perf c2c report and a local list in print_pareto().
> 
> Previously it was detected by ASAN like below.
> 
>   =================================================================
>   ==42183==ERROR: LeakSanitizer: detected memory leaks
> 
>   Indirect leak of 1064 byte(s) in 7 object(s) allocated from:
>       #0 0x7f17334ef24f in calloc (/lib64/libasan.so.8+0xef24f) (BuildId: 61e8165ca90f7a4f06b73f064a938c76deaae079)
>       #1 0x0000005fa099 in zalloc  ../../lib/zalloc.c:8
>       #2 0x0000004faf6d in get_format  tools/perf/builtin-c2c.c:1978
>       #3 0x0000004fb45e in c2c_hists__init_output  tools/perf/builtin-c2c.c:2004
>       #4 0x0000004fb7de in __hpp_list__parse  tools/perf/builtin-c2c.c:2047
>       #5 0x0000004fbae9 in hpp_list__parse  tools/perf/builtin-c2c.c:2085
>       #6 0x0000004fee13 in print_pareto  tools/perf/builtin-c2c.c:2563
>       #7 0x0000004ffcd7 in perf_c2c__hists_fprintf  tools/perf/builtin-c2c.c:2708
>       #8 0x000000500ab5 in perf_c2c_display  tools/perf/builtin-c2c.c:2949
>       #9 0x0000005045c3 in perf_c2c__report  tools/perf/builtin-c2c.c:3522
>       #10 0x000000505caa in cmd_c2c  tools/perf/builtin-c2c.c:3676
>       #11 0x0000005df50e in run_builtin  tools/perf/perf.c:383
>       #12 0x0000005df9b1 in handle_internal_command  tools/perf/perf.c:436
>       #13 0x0000005dfd7f in run_argv  tools/perf/perf.c:480
>       #14 0x0000005e02d6 in main  tools/perf/perf.c:581
>       #15 0x7f1729450680 in __libc_start_call_main (/lib64/libc.so.6+0x3680) (BuildId: 85075e2ae2e13352a1413d41c327dacf6461526c)
>       #16 0x7f1729450797 in __libc_start_main@GLIBC_2.2.5 (/lib64/libc.so.6+0x3797) (BuildId: 85075e2ae2e13352a1413d41c327dacf6461526c)
>       #17 0x000000409c34 in _start (tools/perf/perf+0x409c34) (BuildId: 36a64600776d92e4ab7dfd5ca20c92280d72a645)
> 
>   SUMMARY: AddressSanitizer: 1064 byte(s) leaked in 7 allocation(s).
> 
> Fixes: c75540e3160f ("perf c2c report: Add dimension support")
> Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>

Reviewed-by: Dmitry Ilvokhin <d@xxxxxxxxxxxx>