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Commit f65cb45c authored by Ingo Molnar's avatar Ingo Molnar
Browse files

perfcounters: flush on setuid exec 



Pavel Machek pointed out that performance counters should be flushed
when crossing protection domains on setuid execution.

Reported-by: default avatarPavel Machek <pavel@suse.cz>
Acked-by: default avatarPavel Machek <pavel@suse.cz>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 0cc0c027

fs/exec.c

+8 −0
Original line number Diff line number Diff line
@@ -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 */