aboutsummaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2010-08-27 20:39:12 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-09-08 11:47:19 -0300
commitda34634fd39958725310d2c30c9b4543945f968b (patch)
tree034fa85a0f8ca36fe0e3caa8803b4a6fbe3b9319 /kernel
parentaba91595cfcebd193425e20aabc407531526a1c5 (diff)
downloadmrst-s0i3-test-da34634fd39958725310d2c30c9b4543945f968b.tar.gz
mrst-s0i3-test-da34634fd39958725310d2c30c9b4543945f968b.tar.xz
mrst-s0i3-test-da34634fd39958725310d2c30c9b4543945f968b.zip
tracing/kprobe: Fix handling of C-unlike argument names
Check the argument name whether it is invalid (not C-like symbol name). This makes event format simple. Reported-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20100827113912.22882.62313.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace_kprobe.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index a39251ef1a7..544301d29de 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -514,8 +514,8 @@ static int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs);
static int kretprobe_dispatcher(struct kretprobe_instance *ri,
struct pt_regs *regs);
-/* Check the name is good for event/group */
-static int check_event_name(const char *name)
+/* Check the name is good for event/group/fields */
+static int is_good_name(const char *name)
{
if (!isalpha(*name) && *name != '_')
return 0;
@@ -557,7 +557,7 @@ static struct trace_probe *alloc_trace_probe(const char *group,
else
tp->rp.kp.pre_handler = kprobe_dispatcher;
- if (!event || !check_event_name(event)) {
+ if (!event || !is_good_name(event)) {
ret = -EINVAL;
goto error;
}
@@ -567,7 +567,7 @@ static struct trace_probe *alloc_trace_probe(const char *group,
if (!tp->call.name)
goto error;
- if (!group || !check_event_name(group)) {
+ if (!group || !is_good_name(group)) {
ret = -EINVAL;
goto error;
}
@@ -883,7 +883,7 @@ static int create_trace_probe(int argc, char **argv)
int i, ret = 0;
int is_return = 0, is_delete = 0;
char *symbol = NULL, *event = NULL, *group = NULL;
- char *arg, *tmp;
+ char *arg;
unsigned long offset = 0;
void *addr = NULL;
char buf[MAX_EVENT_NAME_LEN];
@@ -1012,9 +1012,13 @@ static int create_trace_probe(int argc, char **argv)
ret = -ENOMEM;
goto error;
}
- tmp = strchr(tp->args[i].name, ':');
- if (tmp)
- *tmp = '_'; /* convert : to _ */
+
+ if (!is_good_name(tp->args[i].name)) {
+ pr_info("Invalid argument[%d] name: %s\n",
+ i, tp->args[i].name);
+ ret = -EINVAL;
+ goto error;
+ }
if (conflict_field_name(tp->args[i].name, tp->args, i)) {
pr_info("Argument[%d] name '%s' conflicts with "