Commit 92f14518 authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas

arm64/signal: Don't redundantly verify FPSIMD magic

We validate that the magic in the struct fpsimd_context is correct in
restore_fpsimd_context() but this is redundant since parse_user_sigframe()
uses this magic to decide to call the function in the first place. Remove
the extra validation.
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221212-arm64-signal-cleanup-v3-1-4545c94b20ff@kernel.orgSigned-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent ea776e49
...@@ -191,15 +191,14 @@ static int preserve_fpsimd_context(struct fpsimd_context __user *ctx) ...@@ -191,15 +191,14 @@ static int preserve_fpsimd_context(struct fpsimd_context __user *ctx)
static int restore_fpsimd_context(struct fpsimd_context __user *ctx) static int restore_fpsimd_context(struct fpsimd_context __user *ctx)
{ {
struct user_fpsimd_state fpsimd; struct user_fpsimd_state fpsimd;
__u32 magic, size; __u32 size;
int err = 0; int err = 0;
/* check the magic/size information */ /* check the size information */
__get_user_error(magic, &ctx->head.magic, err);
__get_user_error(size, &ctx->head.size, err); __get_user_error(size, &ctx->head.size, err);
if (err) if (err)
return -EFAULT; return -EFAULT;
if (magic != FPSIMD_MAGIC || size != sizeof(struct fpsimd_context)) if (size != sizeof(struct fpsimd_context))
return -EINVAL; return -EINVAL;
/* copy the FP and status/control registers */ /* copy the FP and status/control registers */
......
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