Em Fri, Apr 24, 2015 at 11:35:29PM +0000, Wang Nan escreveu: > Perf top raise a warning if a kernel sample is collected but kernel map > is restricted. The warning message needs to dereference al.map->dso... > However, previous perf_event__preprocess_sample() doesn't always > guarantee al.map != NULL, for example, when kernel map is restricted. > > This patch validates al.map before dereferencing, avoid the segfault. > > Before this patch: > > $ cat /proc/sys/kernel/kptr_restrict > 1 > $ perf top -p 120183
Thanks, applied. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
