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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-08 12:17:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-08 12:17:25 -0700 |
| commit | 09b56d5a418b7ced4ca427c7cf8faf11df72364c (patch) | |
| tree | 88ad1fe20f8fd7df89131cef5c7f8ef96f15406d /mm/mmap.c | |
| parent | fe1b518075d86976db3a93e7e8b640d24d477519 (diff) | |
| parent | 98becb781e3e27d74efe5f3653b948d39f694cfb (diff) | |
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King:
- add support for ftrace-with-registers, which is needed for kgraft and
other ftrace tools
- support for mremap() for the sigpage/vDSO so that checkpoint/restore
can work
- add timestamps to each line of the register dump output
- remove the unused KTHREAD_SIZE from nommu
- align the ARM bitops APIs with the generic API (using unsigned long
pointers rather than void pointers)
- make the configuration of userspace Thumb support an expert option so
that we can default it on, and avoid some hard to debug userspace
crashes
* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8684/1: NOMMU: Remove unused KTHREAD_SIZE definition
ARM: 8683/1: ARM32: Support mremap() for sigpage/vDSO
ARM: 8679/1: bitops: Align prototypes to generic API
ARM: 8678/1: ftrace: Adds support for CONFIG_DYNAMIC_FTRACE_WITH_REGS
ARM: make configuration of userspace Thumb support an expert option
ARM: 8673/1: Fix __show_regs output timestamps
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 5a0ba9788cdd..7f8cfe9d9b4d 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3186,8 +3186,12 @@ static int special_mapping_mremap(struct vm_area_struct *new_vma) { struct vm_special_mapping *sm = new_vma->vm_private_data; + if (WARN_ON_ONCE(current->mm != new_vma->vm_mm)) + return -EFAULT; + if (sm->mremap) return sm->mremap(sm, new_vma); + return 0; } |