Re: [PATCH 16/53 v2] perf tools: Fix mmap2 event allocation in synthesize code

From: Wangnan (F)
Date: Tue Jan 12 2016 - 05:51:54 EST




On 2016/1/12 18:49, åæéå / HIRAMATUïMASAMI wrote:
From: Wang Nan [mailto:wangnan0@xxxxxxxxxx]

perf_event__synthesize_mmap_events() issues mmap2 events, but the
memory of that event is allocated using:

mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);

If path of mmap source file is long (near PATH_MAX), random crash
would happen. Should use sizeof(mmap_event->mmap2).

Fix two memory allocations.
Looks good to me. But hope to have another rename patch soon after this...

According to Arnaldo, we don't need rename patch. He think mmap_event
is okay. Right?

Thank you.