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authorLinus Torvalds <torvalds@linux-foundation.org>2018-11-30 18:36:30 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-11-30 18:36:30 -0800
commit1f817429b2ddc08f5c92a5b83d0f303f1e0d1bd4 (patch)
tree43d5a324441994e29132fe5252c21bf08a757884 /kernel
parentfd3b3e0ec59db813d3ff665e158b1390ecdcfd14 (diff)
parentef1a8409348966f0b25ff97a170d6d0367710ea9 (diff)
Merge tag 'gcc-plugins-v4.20-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull stackleak plugin fix from Kees Cook: "Fix crash by not allowing kprobing of stackleak_erase() (Alexander Popov)" * tag 'gcc-plugins-v4.20-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: stackleak: Disable function tracing and kprobes for stackleak_erase()
Diffstat (limited to 'kernel')
-rw-r--r--kernel/stackleak.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/stackleak.c b/kernel/stackleak.c
index e42892926244..08cb57eed389 100644
--- a/kernel/stackleak.c
+++ b/kernel/stackleak.c
@@ -11,6 +11,7 @@
*/
#include <linux/stackleak.h>
+#include <linux/kprobes.h>
#ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
#include <linux/jump_label.h>
@@ -47,7 +48,7 @@ int stack_erasing_sysctl(struct ctl_table *table, int write,
#define skip_erasing() false
#endif /* CONFIG_STACKLEAK_RUNTIME_DISABLE */
-asmlinkage void stackleak_erase(void)
+asmlinkage void notrace stackleak_erase(void)
{
/* It would be nice not to have 'kstack_ptr' and 'boundary' on stack */
unsigned long kstack_ptr = current->lowest_stack;
@@ -101,6 +102,7 @@ asmlinkage void stackleak_erase(void)
/* Reset the 'lowest_stack' value for the next syscall */
current->lowest_stack = current_top_of_stack() - THREAD_SIZE/64;
}
+NOKPROBE_SYMBOL(stackleak_erase);
void __used stackleak_track_stack(void)
{