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authorIngo Molnar <mingo@elte.hu>2008-12-16 13:40:44 +0100
committerIngo Molnar <mingo@elte.hu>2008-12-16 14:00:15 +0100
commitf65cb45cba63f249458b669aa67069eabc37b2f5 (patch)
tree5ebb0ec9a74704e8059e23625179e5e55c4ce016 /fs/exec.c
parent0cc0c027d4e028632933f1be2dc4cd730358183b (diff)
downloadop-kernel-dev-f65cb45cba63f249458b669aa67069eabc37b2f5.zip
op-kernel-dev-f65cb45cba63f249458b669aa67069eabc37b2f5.tar.gz
perfcounters: flush on setuid exec
Pavel Machek pointed out that performance counters should be flushed when crossing protection domains on setuid execution. Reported-by: Pavel Machek <pavel@suse.cz> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index ec5df9a..d5165d8 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -33,6 +33,7 @@
#include <linux/string.h>
#include <linux/init.h>
#include <linux/pagemap.h>
+#include <linux/perf_counter.h>
#include <linux/highmem.h>
#include <linux/spinlock.h>
#include <linux/key.h>
@@ -1017,6 +1018,13 @@ int flush_old_exec(struct linux_binprm * bprm)
set_dumpable(current->mm, suid_dumpable);
}
+ /*
+ * Flush performance counters when crossing a
+ * security domain:
+ */
+ if (!get_dumpable(current->mm))
+ perf_counter_exit_task(current);
+
/* An exec changes our domain. We are no longer part of the thread
group */
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