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| author | Masami Hiramatsu <mhiramat@redhat.com> | 2010-03-12 18:22:17 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-03-13 08:32:22 +0100 |
| commit | 594087a04eea544356f9c52e83c1a9bc380ce80f (patch) | |
| tree | 30aef0f600edc6bb20d77974c9de2c923aabec8f | |
| parent | 9f591fd76afdc0e5192e9ed00a36f8efc0b4dfe6 (diff) | |
| download | op-kernel-dev-594087a04eea544356f9c52e83c1a9bc380ce80f.zip op-kernel-dev-594087a04eea544356f9c52e83c1a9bc380ce80f.tar.gz | |
perf probe: Fix probe_point buffer overrun
Fix probe_point array-size overrun problem. In some cases (e.g.
inline function), one user-specified probe-point can be
translated to many probe address, and it overruns pre-defined
array-size. This also removes redundant MAX_PROBES macro
definition.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: <stable@kernel.org>
LKML-Reference: <20100312232217.2017.45017.stgit@localhost6.localdomain6>
[ Note that only root can create new probes. Eventually we should remove
the MAX_PROBES limit, but that is a larger patch not eligible to
perf/urgent treatment. ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | tools/perf/builtin-probe.c | 1 | ||||
| -rw-r--r-- | tools/perf/util/probe-finder.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index c30a335..152d6c9 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -47,7 +47,6 @@ #include "util/probe-event.h" #define MAX_PATH_LEN 256 -#define MAX_PROBES 128 /* Session management structure */ static struct { diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index 1e6c65e..f9cbbf1 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -455,6 +455,9 @@ static void show_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf) /* *pf->fb_ops will be cached in libdw. Don't free it. */ pf->fb_ops = NULL; + if (pp->found == MAX_PROBES) + die("Too many( > %d) probe point found.\n", MAX_PROBES); + pp->probes[pp->found] = strdup(tmp); pp->found++; } |
