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kprobes/x86: Check for invalid ftrace location in __recover_probed_insn()
[deliverable/linux.git]
/
arch
/
x86
/
kernel
/
kprobes
/
opt.c
diff --git
a/arch/x86/kernel/kprobes/opt.c
b/arch/x86/kernel/kprobes/opt.c
index 7c523bbf3dc8fc3f95acf0a374e9f6f1164c3f47..3aef248ec1ee1d0df58174a8af74eb986249d2e2 100644
(file)
--- a/
arch/x86/kernel/kprobes/opt.c
+++ b/
arch/x86/kernel/kprobes/opt.c
@@
-259,6
+259,8
@@
static int can_optimize(unsigned long paddr)
*/
return 0;
recovered_insn = recover_probed_instruction(buf, addr);
+ if (!recovered_insn)
+ return 0;
kernel_insn_init(&insn, (void *)recovered_insn, MAX_INSN_SIZE);
insn_get_length(&insn);
/* Another subsystem puts a breakpoint */
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