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usercopy: use unsigned long instead of uintptr_t 

A recent commit factored out a series of annoying (unsigned long) casts
into a single variable declaration, but made the pointer type a
`uintptr_t` rather than the usual `unsigned long`. This patch changes it
to be the integer type more typically used by the kernel to represent
addresses.

Fixes: 35fb9ae4aa ("usercopy: Cast pointer to an integer once")
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Uladzislau Rezki <urezki@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220616143617.449094-1-Jason@zx2c4.com
This commit is contained in:
Jason A. Donenfeld 2022-06-16 16:36:17 +02:00 committed by Kees Cook
parent a111daf0c5
commit 170b2c350c
1 changed files with 1 additions and 1 deletions
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mm/usercopy.c
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@ -161,7 +161,7 @@ static inline void check_bogus_address(const unsigned long ptr, unsigned long n,
static inline void check_heap_object(const void *ptr, unsigned long n,
bool to_user)
{
uintptr_t addr = (uintptr_t)ptr;
unsigned long addr = (unsigned long)ptr;
unsigned long offset;
struct folio *folio;