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author | Dave Martin <Dave.Martin@arm.com> | 2017-03-27 15:10:55 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-03-29 08:54:17 -0700 |
commit | a78ce80d2c9178351b34d78fec805140c29c193e (patch) | |
tree | 8eaa65759d128a6fb2ff25847fa1ff3170a7938e /arch | |
parent | 502585c7555083d4a949c08350306b9ec196779e (diff) | |
download | linux-stable-a78ce80d2c9178351b34d78fec805140c29c193e.tar.gz linux-stable-a78ce80d2c9178351b34d78fec805140c29c193e.tar.bz2 linux-stable-a78ce80d2c9178351b34d78fec805140c29c193e.zip |
metag/ptrace: Preserve previous registers for short regset write
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>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/metag/kernel/ptrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
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) |