diff options
| author | Mika Penttilä <mika.penttila@nextfour.com> | 2016-03-15 21:56:45 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-15 23:55:16 (GMT) |
| commit | 9cb65bc3b1114004e2ccee5939031325c7bf16e8 (patch) | |
| tree | 9bf1f9abfb604f6d98bf9b8a641a5b8d6733fc53 | |
| parent | 4355c018c2ba8017592520573e76ad376ad656db (diff) | |
| download | linux-9cb65bc3b1114004e2ccee5939031325c7bf16e8.tar.xz | |
mm/memory.c: make apply_to_page_range() more robust
Arm and arm64 used to trigger this BUG_ON() - this has now been fixed.
But a WARN_ON() here is sufficient to catch future buggy callers.
Signed-off-by: Mika Penttilä <mika.penttila@nextfour.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memory.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index 8132787..8adb5b7 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1876,7 +1876,9 @@ int apply_to_page_range(struct mm_struct *mm, unsigned long addr, unsigned long end = addr + size; int err; - BUG_ON(addr >= end); + if (WARN_ON(addr >= end)) + return -EINVAL; + pgd = pgd_offset(mm, addr); do { next = pgd_addr_end(addr, end); |