Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH 4/4] make apply_to_page_range() more robust. | Date | Sat, 23 Jan 2016 17:05:43 +0200 |
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From: Mika Penttilä <mika.penttila@nextfour.com>
Now the arm/arm64 don't trigger this BUG_ON() any more, but WARN_ON() is here enough to catch buggy callers but still let potential other !size callers pass with warning.
Signed-off-by: Mika Penttilä mika.penttila@nextfour.com
--- mm/memory.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/memory.c b/mm/memory.c index 30991f8..9178ee6 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1871,7 +1871,9 @@ 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); -- 1.9.1
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