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arm64: ptrace: Remove redundant overrun check from compat_vfp_set() 

compat_vfp_set() checks for userspace trying to write an excessive
amount of data to the regset.  However this check is conspicuous
for its absence from every other _set() in the arm64 ptrace
implementation.  In fact, the core ptrace_regset() already clamps
userspace's iov_len to the regset size before the individual regset
.{get,set}() methods get called.

This patch removes the redundant check.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Dave Martin 2017-06-29 15:25:48 +01:00 committed by Will Deacon
parent 53b1a742ed
commit 16d38acb12
1 changed files with 0 additions and 3 deletions
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3
arch/arm64/kernel/ptrace.c
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@ -937,9 +937,6 @@ static int compat_vfp_set(struct task_struct *target,
compat_ulong_t fpscr;
int ret;
if (pos + count > VFP_STATE_SIZE)
return -EIO;
uregs = &target->thread.fpsimd_state.user_fpsimd;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0,