Messages in this thread Patch in this message | | | Date | Wed, 29 Nov 2017 15:22:01 +0000 | From | "Maciej W. Rozycki" <> | Subject | [PATCH 5/5] MIPS: Disallow outsized PTRACE_SETREGSET NT_PRFPREG regset accesses |
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Complement commit c23b3d1a5311 ("MIPS: ptrace: Change GP regset to use correct core dump register layout") and also reject outsized PTRACE_SETREGSET requests to the NT_PRFPREG regset, like with the NT_PRSTATUS regset.
Cc: stable@vger.kernel.org # v3.17+ Fixes: c23b3d1a5311 ("MIPS: ptrace: Change GP regset to use correct core dump register layout") Signed-off-by: Maciej W. Rozycki <macro@mips.com> --- arch/mips/kernel/ptrace.c | 3 +++ 1 file changed, 3 insertions(+)
linux-mips-nt-prfpreg-size.diff Index: linux-sfr-test/arch/mips/kernel/ptrace.c =================================================================== --- linux-sfr-test.orig/arch/mips/kernel/ptrace.c 2017-11-28 23:52:40.373594000 +0000 +++ linux-sfr-test/arch/mips/kernel/ptrace.c 2017-11-28 23:52:47.058649000 +0000 @@ -533,6 +533,9 @@ static int fpr_set(struct task_struct *t u32 fcr31; int err; + if (pos + count > sizeof(elf_fpregset_t)) + return -EIO; + init_fp_ctx(target); if (sizeof(target->thread.fpu.fpr[0]) == sizeof(elf_fpreg_t))
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