diff options
| author | Maciej W. Rozycki <macro@mips.com> | 2017-12-12 01:55:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-17 11:29:28 +0300 |
| commit | c3b291e7fb8d9256c56d932dfbb1fc847a5f8a2c (patch) | |
| tree | 7197c07902cab5080d10a926642b88bd18450611 /arch | |
| parent | 1eaff733141a52dce42b2bcce8db7643843ba121 (diff) | |
| download | linux-c3b291e7fb8d9256c56d932dfbb1fc847a5f8a2c.tar.xz | |
MIPS: Also verify sizeof `elf_fpreg_t' with PTRACE_SETREGSET
commit 006501e039eec411842bb3150c41358867d320c2 upstream.
Complement commit d614fd58a283 ("mips/ptrace: Preserve previous
registers for short regset write") and like with the PTRACE_GETREGSET
ptrace(2) request also apply a BUILD_BUG_ON check for the size of the
`elf_fpreg_t' type in the PTRACE_SETREGSET request handler.
Signed-off-by: Maciej W. Rozycki <macro@mips.com>
Fixes: d614fd58a283 ("mips/ptrace: Preserve previous registers for short regset write")
Cc: James Hogan <james.hogan@mips.com>
Cc: Paul Burton <Paul.Burton@mips.com>
Cc: Alex Smith <alex@alex-smith.me.uk>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17929/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/ptrace.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c index ae02cd1a038e..8b19ef037253 100644 --- a/arch/mips/kernel/ptrace.c +++ b/arch/mips/kernel/ptrace.c @@ -428,6 +428,7 @@ static int fpr_get_msa(struct task_struct *target, u64 fpr_val; int err; + BUILD_BUG_ON(sizeof(fpr_val) != sizeof(elf_fpreg_t)); for (i = 0; i < NUM_FPU_REGS; i++) { fpr_val = get_fpr64(&target->thread.fpu.fpr[i], 0); err = user_regset_copyout(pos, count, kbuf, ubuf, |