* [PATCH] perf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus.
@ 2020-03-08 10:59 zhe.he
2020-03-18 10:32 ` Jiri Olsa
2020-05-08 13:05 ` [tip: perf/core] libperf: " tip-bot2 for He Zhe
0 siblings, 2 replies; 5+ messages in thread
From: zhe.he @ 2020-03-08 10:59 UTC (permalink / raw)
To: acme, jolsa, ak, meyerk, linux-kernel, zhe.he
From: He Zhe <zhe.he@windriver.com>
NULL pointer may be passed to perf_cpu_map__cpu and then cause crash,
such as the one commit cb71f7d43ece ("libperf: Setup initial evlist::all_cpus value")
fix.
Signed-off-by: He Zhe <zhe.he@windriver.com>
---
tools/perf/lib/cpumap.c | 2 +-
tools/perf/lib/evlist.c | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
index f93f4e7..ca02150 100644
--- a/tools/perf/lib/cpumap.c
+++ b/tools/perf/lib/cpumap.c
@@ -247,7 +247,7 @@ struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx)
{
- if (idx < cpus->nr)
+ if (cpus && idx < cpus->nr)
return cpus->map[idx];
return -1;
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 5b9f2ca..f87a239 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -127,6 +127,7 @@ void perf_evlist__exit(struct perf_evlist *evlist)
perf_cpu_map__put(evlist->cpus);
perf_thread_map__put(evlist->threads);
evlist->cpus = NULL;
+ evlist->all_cpus = NULL;
evlist->threads = NULL;
fdarray__exit(&evlist->pollfd);
}
--
2.7.4
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] perf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus.
2020-03-08 10:59 [PATCH] perf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus zhe.he
@ 2020-03-18 10:32 ` Jiri Olsa
2020-03-18 13:34 ` Arnaldo Carvalho de Melo
2020-05-08 13:05 ` [tip: perf/core] libperf: " tip-bot2 for He Zhe
1 sibling, 1 reply; 5+ messages in thread
From: Jiri Olsa @ 2020-03-18 10:32 UTC (permalink / raw)
To: zhe.he; +Cc: acme, jolsa, ak, meyerk, linux-kernel
On Sun, Mar 08, 2020 at 06:59:17PM +0800, zhe.he@windriver.com wrote:
> From: He Zhe <zhe.he@windriver.com>
>
> NULL pointer may be passed to perf_cpu_map__cpu and then cause crash,
> such as the one commit cb71f7d43ece ("libperf: Setup initial evlist::all_cpus value")
> fix.
>
> Signed-off-by: He Zhe <zhe.he@windriver.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
thanks,
jirka
> ---
> tools/perf/lib/cpumap.c | 2 +-
> tools/perf/lib/evlist.c | 1 +
> 2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
> index f93f4e7..ca02150 100644
> --- a/tools/perf/lib/cpumap.c
> +++ b/tools/perf/lib/cpumap.c
> @@ -247,7 +247,7 @@ struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
>
> int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx)
> {
> - if (idx < cpus->nr)
> + if (cpus && idx < cpus->nr)
> return cpus->map[idx];
>
> return -1;
> diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
> index 5b9f2ca..f87a239 100644
> --- a/tools/perf/lib/evlist.c
> +++ b/tools/perf/lib/evlist.c
> @@ -127,6 +127,7 @@ void perf_evlist__exit(struct perf_evlist *evlist)
> perf_cpu_map__put(evlist->cpus);
> perf_thread_map__put(evlist->threads);
> evlist->cpus = NULL;
> + evlist->all_cpus = NULL;
> evlist->threads = NULL;
> fdarray__exit(&evlist->pollfd);
> }
> --
> 2.7.4
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] perf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus.
2020-03-18 10:32 ` Jiri Olsa
@ 2020-03-18 13:34 ` Arnaldo Carvalho de Melo
2020-04-29 17:49 ` Arnaldo Carvalho de Melo
0 siblings, 1 reply; 5+ messages in thread
From: Arnaldo Carvalho de Melo @ 2020-03-18 13:34 UTC (permalink / raw)
To: Jiri Olsa; +Cc: zhe.he, jolsa, ak, meyerk, linux-kernel
Em Wed, Mar 18, 2020 at 11:32:24AM +0100, Jiri Olsa escreveu:
> On Sun, Mar 08, 2020 at 06:59:17PM +0800, zhe.he@windriver.com wrote:
> > From: He Zhe <zhe.he@windriver.com>
> >
> > NULL pointer may be passed to perf_cpu_map__cpu and then cause crash,
> > such as the one commit cb71f7d43ece ("libperf: Setup initial evlist::all_cpus value")
> > fix.
> >
> > Signed-off-by: He Zhe <zhe.he@windriver.com>
>
> Acked-by: Jiri Olsa <jolsa@redhat.com>
>
> thanks,
> jirka
>
> > ---
> > tools/perf/lib/cpumap.c | 2 +-
> > tools/perf/lib/evlist.c | 1 +
> > 2 files changed, 2 insertions(+), 1 deletion(-)
this is in tools/lib/perf/ for some time already, I'll do the changes
there, thanks,
- Arnaldo
> >
> > diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
> > index f93f4e7..ca02150 100644
> > --- a/tools/perf/lib/cpumap.c
> > +++ b/tools/perf/lib/cpumap.c
> > @@ -247,7 +247,7 @@ struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
> >
> > int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx)
> > {
> > - if (idx < cpus->nr)
> > + if (cpus && idx < cpus->nr)
> > return cpus->map[idx];
> >
> > return -1;
> > diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
> > index 5b9f2ca..f87a239 100644
> > --- a/tools/perf/lib/evlist.c
> > +++ b/tools/perf/lib/evlist.c
> > @@ -127,6 +127,7 @@ void perf_evlist__exit(struct perf_evlist *evlist)
> > perf_cpu_map__put(evlist->cpus);
> > perf_thread_map__put(evlist->threads);
> > evlist->cpus = NULL;
> > + evlist->all_cpus = NULL;
> > evlist->threads = NULL;
> > fdarray__exit(&evlist->pollfd);
> > }
> > --
> > 2.7.4
> >
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] perf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus.
2020-03-18 13:34 ` Arnaldo Carvalho de Melo
@ 2020-04-29 17:49 ` Arnaldo Carvalho de Melo
0 siblings, 0 replies; 5+ messages in thread
From: Arnaldo Carvalho de Melo @ 2020-04-29 17:49 UTC (permalink / raw)
To: Jiri Olsa; +Cc: zhe.he, jolsa, ak, meyerk, linux-kernel
Em Wed, Mar 18, 2020 at 10:34:35AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Wed, Mar 18, 2020 at 11:32:24AM +0100, Jiri Olsa escreveu:
> > On Sun, Mar 08, 2020 at 06:59:17PM +0800, zhe.he@windriver.com wrote:
> > > From: He Zhe <zhe.he@windriver.com>
> > >
> > > NULL pointer may be passed to perf_cpu_map__cpu and then cause crash,
> > > such as the one commit cb71f7d43ece ("libperf: Setup initial evlist::all_cpus value")
> > > fix.
> > >
> > > Signed-off-by: He Zhe <zhe.he@windriver.com>
> >
> > Acked-by: Jiri Olsa <jolsa@redhat.com>
> >
> > thanks,
> > jirka
> >
> > > ---
> > > tools/perf/lib/cpumap.c | 2 +-
> > > tools/perf/lib/evlist.c | 1 +
> > > 2 files changed, 2 insertions(+), 1 deletion(-)
>
> this is in tools/lib/perf/ for some time already, I'll do the changes
> there, thanks,
Fixed up from tools/perf/lib to tools/lib/perf and applied.
> - Arnaldo
>
> > >
> > > diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
> > > index f93f4e7..ca02150 100644
> > > --- a/tools/perf/lib/cpumap.c
> > > +++ b/tools/perf/lib/cpumap.c
> > > @@ -247,7 +247,7 @@ struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
> > >
> > > int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx)
> > > {
> > > - if (idx < cpus->nr)
> > > + if (cpus && idx < cpus->nr)
> > > return cpus->map[idx];
> > >
> > > return -1;
> > > diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
> > > index 5b9f2ca..f87a239 100644
> > > --- a/tools/perf/lib/evlist.c
> > > +++ b/tools/perf/lib/evlist.c
> > > @@ -127,6 +127,7 @@ void perf_evlist__exit(struct perf_evlist *evlist)
> > > perf_cpu_map__put(evlist->cpus);
> > > perf_thread_map__put(evlist->threads);
> > > evlist->cpus = NULL;
> > > + evlist->all_cpus = NULL;
> > > evlist->threads = NULL;
> > > fdarray__exit(&evlist->pollfd);
> > > }
> > > --
> > > 2.7.4
> > >
^ permalink raw reply [flat|nested] 5+ messages in thread
* [tip: perf/core] libperf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus.
2020-03-08 10:59 [PATCH] perf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus zhe.he
2020-03-18 10:32 ` Jiri Olsa
@ 2020-05-08 13:05 ` tip-bot2 for He Zhe
1 sibling, 0 replies; 5+ messages in thread
From: tip-bot2 for He Zhe @ 2020-05-08 13:05 UTC (permalink / raw)
To: linux-tip-commits
Cc: He Zhe, Jiri Olsa, Andi Kleen, Kyle Meyer,
Arnaldo Carvalho de Melo, x86, LKML
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 44d041b7b2c11b6739501fd3763cc6fed62cf0ed
Gitweb: https://git.kernel.org/tip/44d041b7b2c11b6739501fd3763cc6fed62cf0ed
Author: He Zhe <zhe.he@windriver.com>
AuthorDate: Sun, 08 Mar 2020 18:59:17 +08:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Tue, 05 May 2020 16:35:29 -03:00
libperf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus.
A NULL pointer may be passed to perf_cpu_map__cpu and then cause a
crash, such as the one commit cb71f7d43ece ("libperf: Setup initial
evlist::all_cpus value") fix.
Signed-off-by: He Zhe <zhe.he@windriver.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kyle Meyer <meyerk@hpe.com>
Link: http://lore.kernel.org/lkml/1583665157-349023-1-git-send-email-zhe.he@windriver.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/lib/perf/cpumap.c | 2 +-
tools/lib/perf/evlist.c | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c
index f93f4e7..ca02150 100644
--- a/tools/lib/perf/cpumap.c
+++ b/tools/lib/perf/cpumap.c
@@ -247,7 +247,7 @@ out:
int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx)
{
- if (idx < cpus->nr)
+ if (cpus && idx < cpus->nr)
return cpus->map[idx];
return -1;
diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
index def5505..c481b62 100644
--- a/tools/lib/perf/evlist.c
+++ b/tools/lib/perf/evlist.c
@@ -125,6 +125,7 @@ void perf_evlist__exit(struct perf_evlist *evlist)
perf_cpu_map__put(evlist->cpus);
perf_thread_map__put(evlist->threads);
evlist->cpus = NULL;
+ evlist->all_cpus = NULL;
evlist->threads = NULL;
fdarray__exit(&evlist->pollfd);
}
^ permalink raw reply related [flat|nested] 5+ messages in thread
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2020-03-08 10:59 [PATCH] perf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus zhe.he
2020-03-18 10:32 ` Jiri Olsa
2020-03-18 13:34 ` Arnaldo Carvalho de Melo
2020-04-29 17:49 ` Arnaldo Carvalho de Melo
2020-05-08 13:05 ` [tip: perf/core] libperf: " tip-bot2 for He Zhe
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