Messages in this thread Patch in this message | | | From | Jiri Slaby <> | Subject | [PATCH 3.12 106/142] metag/ptrace: Preserve previous registers for short regset write | Date | Mon, 10 Apr 2017 17:33:07 +0200 |
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From: Dave Martin <Dave.Martin@arm.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit a78ce80d2c9178351b34d78fec805140c29c193e upstream.
Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET to fill all the registers, the thread's old registers are preserved.
Signed-off-by: Dave Martin <Dave.Martin@arm.com> Acked-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- arch/metag/kernel/ptrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/metag/kernel/ptrace.c b/arch/metag/kernel/ptrace.c index 7563628822bd..ae659ba61948 100644 --- a/arch/metag/kernel/ptrace.c +++ b/arch/metag/kernel/ptrace.c @@ -303,7 +303,7 @@ static int metag_tls_set(struct task_struct *target, const void *kbuf, const void __user *ubuf) { int ret; - void __user *tls; + void __user *tls = target->thread.tls_ptr; ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1); if (ret) -- 2.12.2
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