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| author | Wufei <fei.wu@windriver.com> | 2010-04-28 17:42:32 -0400 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2010-04-29 21:41:44 -0500 |
| commit | 56151e753468e34aeb322af4b0309ab727c97d2e (patch) | |
| tree | dd2b28d468e3c5fda711df1c0a3a6a3356772be9 | |
| parent | 79dba2eaa771c3173957eccfd288e0e0d12e4d3f (diff) | |
| download | linux-stable-56151e753468e34aeb322af4b0309ab727c97d2e.tar.gz linux-stable-56151e753468e34aeb322af4b0309ab727c97d2e.tar.bz2 linux-stable-56151e753468e34aeb322af4b0309ab727c97d2e.zip | |
kgdb: don't needlessly skip PAGE_USER test for Fsl booke
The bypassing of this test is a leftover from 2.4 vintage
kernels, and is no longer appropriate, or even used by KGDB.
Currently KGDB uses probe_kernel_write() for all access to
memory via the KGDB core, so it can simply be deleted.
This fixes CVE-2010-1446.
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Wufei <fei.wu@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
| -rw-r--r-- | arch/powerpc/mm/fsl_booke_mmu.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c index c5394728bf2e..1ce9dd51a2f6 100644 --- a/arch/powerpc/mm/fsl_booke_mmu.c +++ b/arch/powerpc/mm/fsl_booke_mmu.c @@ -155,15 +155,10 @@ static void settlbcam(int index, unsigned long virt, phys_addr_t phys, if (cur_cpu_spec->cpu_features & MMU_FTR_BIG_PHYS) TLBCAM[index].MAS7 = (u64)phys >> 32; -#ifndef CONFIG_KGDB /* want user access for breakpoints */ if (flags & _PAGE_USER) { TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR; TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0); } -#else - TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR; - TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0); -#endif tlbcam_addrs[index].start = virt; tlbcam_addrs[index].limit = virt + size - 1; |