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| author | Ingo Molnar <mingo@kernel.org> | 2013-12-16 14:51:32 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-12-16 14:51:32 +0100 |
| commit | fe361cfcf40ad4612226347573a8669cd0d44799 (patch) | |
| tree | e874ef5a29c3bfe3dd67dc2d8962562c00fc8e3a /arch/s390/lib/uaccess_pt.c | |
| parent | perf: Optimize ring-buffer write by depending on control dependencies (diff) | |
| parent | Linux 3.13-rc4 (diff) | |
| download | linux-fe361cfcf40ad4612226347573a8669cd0d44799.tar.xz linux-fe361cfcf40ad4612226347573a8669cd0d44799.zip | |
Merge tag 'v3.13-rc4' into perf/core
Merge Linux 3.13-rc4, to refresh this branch with the latest fixes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/s390/lib/uaccess_pt.c')
| -rw-r--r-- | arch/s390/lib/uaccess_pt.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/lib/uaccess_pt.c b/arch/s390/lib/uaccess_pt.c index 97e03caf7825..dbdab3e7a1a6 100644 --- a/arch/s390/lib/uaccess_pt.c +++ b/arch/s390/lib/uaccess_pt.c @@ -78,11 +78,14 @@ static size_t copy_in_kernel(size_t count, void __user *to, * contains the (negative) exception code. */ #ifdef CONFIG_64BIT + static unsigned long follow_table(struct mm_struct *mm, unsigned long address, int write) { unsigned long *table = (unsigned long *)__pa(mm->pgd); + if (unlikely(address > mm->context.asce_limit - 1)) + return -0x38UL; switch (mm->context.asce_bits & _ASCE_TYPE_MASK) { case _ASCE_TYPE_REGION1: table = table + ((address >> 53) & 0x7ff); |