This is a note to let you know that I've just added the patch titled
MIPS: Also verify sizeof `elf_fpreg_t' with PTRACE_SETREGSET
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mips-also-verify-sizeof-elf_fpreg_t-with-ptrace_setregset.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 006501e039eec411842bb3150c41358867d320c2 Mon Sep 17 00:00:00 2001
From: "Maciej W. Rozycki" <macro@xxxxxxxx>
Date: Mon, 11 Dec 2017 22:55:40 +0000
Subject: MIPS: Also verify sizeof `elf_fpreg_t' with PTRACE_SETREGSET
From: Maciej W. Rozycki <macro@xxxxxxxx>
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@xxxxxxxx>
Fixes: d614fd58a283 ("mips/ptrace: Preserve previous registers for short regset write")
Cc: James Hogan <james.hogan@xxxxxxxx>
Cc: Paul Burton <Paul.Burton@xxxxxxxx>
Cc: Alex Smith <alex@xxxxxxxxxxxxxxxx>
Cc: Dave Martin <Dave.Martin@xxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/17929/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/kernel/ptrace.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -467,6 +467,7 @@ static int fpr_get_msa(struct task_struc
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,
Patches currently in stable-queue which might be from macro@xxxxxxxx are
queue-4.4/mips-consistently-handle-buffer-counter-with-ptrace_setregset.patch
queue-4.4/mips-disallow-outsized-ptrace_setregset-nt_prfpreg-regset-accesses.patch
queue-4.4/mips-guard-against-any-partial-write-attempt-with-ptrace_setregset.patch
queue-4.4/mips-also-verify-sizeof-elf_fpreg_t-with-ptrace_setregset.patch
queue-4.4/mips-factor-out-nt_prfpreg-regset-access-helpers.patch
queue-4.4/mips-validate-pr_set_fp_mode-prctl-2-requests-against-the-abi-of-the-task.patch
queue-4.4/mips-fix-an-fcsr-access-api-regression-with-nt_prfpreg-and-msa.patch