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Merge "mm/usercopy: Use memory range to be accessed for wraparound check"

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qctecmdr Service 2019-01-11 21:02:38 -08:00 committed by Gerrit - the friendly Code Review server
commit fab1a14a60
1 changed files with 1 additions and 1 deletions
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mm/usercopy.c
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@ -151,7 +151,7 @@ static inline void check_bogus_address(const unsigned long ptr, unsigned long n,
bool to_user)
{
/* Reject if object wraps past end of memory. */
if (ptr + n < ptr)
if (ptr + (n - 1) < ptr)
usercopy_abort("wrapped address", NULL, to_user, 0, ptr + n);
/* Reject if NULL or ZERO-allocation. */