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treewide: use get_random_u32_inclusive() when possible

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These cases were done with this Coccinelle:

@@
expression H;
expression L;
@@
- (get_random_u32_below(H) + L)
+ get_random_u32_inclusive(L, H + L - 1)

@@
expression H;
expression L;
expression E;
@@
  get_random_u32_inclusive(L,
  H
- + E
- - E
  )

@@
expression H;
expression L;
expression E;
@@
  get_random_u32_inclusive(L,
  H
- - E
- + E
  )

@@
expression H;
expression L;
expression E;
expression F;
@@
  get_random_u32_inclusive(L,
  H
- - E
  + F
- + E
  )

@@
expression H;
expression L;
expression E;
expression F;
@@
  get_random_u32_inclusive(L,
  H
- + E
  + F
- - E
  )

And then subsequently cleaned up by hand, with several automatic cases
rejected if it didn't make sense contextually.

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> # for infiniband
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
2022-10-09 20:44:02 -06:00
parent d247aabd39
commit e8a533cbeb
24 changed files with 54 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
lib/test_vmalloc.c
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@@ -151,7 +151,7 @@ static int random_size_alloc_test(void)
int i;
for (i = 0; i < test_loop_count; i++) {
n = get_random_u32_below(100) + 1;
n = get_random_u32_inclusive(1, 100);
p = vmalloc(n * PAGE_SIZE);
if (!p)
@@ -291,12 +291,12 @@ pcpu_alloc_test(void)
return -1;
for (i = 0; i < 35000; i++) {
size = get_random_u32_below(PAGE_SIZE / 4) + 1;
size = get_random_u32_inclusive(1, PAGE_SIZE / 4);
/*
* Maximum PAGE_SIZE
*/
align = 1 << (get_random_u32_below(11) + 1);
align = 1 << get_random_u32_inclusive(1, 11);
pcpu[i] = __alloc_percpu(size, align);
if (!pcpu[i])