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authorIngo Molnar <mingo@elte.hu>2009-06-18 08:00:17 +0200
committerIngo Molnar <mingo@elte.hu>2009-06-18 08:15:47 +0200
commit7522060c95395f479ee4a6af3bbf9e097e92e48f (patch)
tree3530611cfd45c75c5a1952210edb2953598a9afe /include/linux/perf_counter.h
parentb25bcf2f133b1e6216c3d40be394756107d3880f (diff)
downloadop-kernel-dev-7522060c95395f479ee4a6af3bbf9e097e92e48f.zip
op-kernel-dev-7522060c95395f479ee4a6af3bbf9e097e92e48f.tar.gz
perf report: Add validation of call-chain entries
Add boundary checks for call-chain events. In case of corrupted entries we could crash otherwise. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_counter.h')
-rw-r--r--include/linux/perf_counter.h20
1 files changed, 10 insertions, 10 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index eccae43..a7d3a61 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -337,6 +337,16 @@ enum perf_event_type {
*/
};
+#define MAX_STACK_DEPTH 255
+
+struct perf_callchain_entry {
+ __u16 nr;
+ __u16 hv;
+ __u16 kernel;
+ __u16 user;
+ __u64 ip[MAX_STACK_DEPTH];
+};
+
#ifdef __KERNEL__
/*
* Kernel-internal data types and definitions:
@@ -652,16 +662,6 @@ extern void perf_counter_fork(struct task_struct *tsk);
extern void perf_counter_task_migration(struct task_struct *task, int cpu);
-#define MAX_STACK_DEPTH 255
-
-struct perf_callchain_entry {
- u16 nr;
- u16 hv;
- u16 kernel;
- u16 user;
- u64 ip[MAX_STACK_DEPTH];
-};
-
extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
extern int sysctl_perf_counter_paranoid;
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