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authorJiri Olsa <jolsa@redhat.com>2012-04-04 22:21:31 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-04-05 18:58:45 -0300
commit8493fe1daf15324eb13a4cc2f94e258716daa568 (patch)
tree31cdd2296154a6288b643cda10af61b78235f4a1 /tools/perf/util/ui/browser.h
parentperf hists: Catch and handle out-of-date hist entry maps. (diff)
downloadlinux-dev-8493fe1daf15324eb13a4cc2f94e258716daa568.tar.xz
linux-dev-8493fe1daf15324eb13a4cc2f94e258716daa568.zip
perf hists browser: Fix NULL deref in hists browsing code
If there's an event with no samples in data file, the perf report command can segfault after entering the event details menu. Following steps reproduce the issue: # ./perf record -e syscalls:sys_enter_kexec_load,syscalls:sys_enter_mmap ls # ./perf report # enter '0 syscalls:sys_enter_kexec_load' menu # pres ENTER twice Above steps are valid assuming ls wont run kexec.. ;) The check for sellection to be NULL is missing. The fix makes sure it's being check. Above steps now endup with menu being displayed allowing 'Exit' as the only option. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1333570898-10505-2-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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