From: Tyson Smith <[email protected]>
Added 50/50 chance of skipping 64bit modifications code block. This should
likely be closer to 1 in 4 odds of entering this branch, perhaps less if
these values haven't been triggering issues in the past.
---
interesting-numbers.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/interesting-numbers.c b/interesting-numbers.c
index 4b4e785..aeb0335 100644
--- a/interesting-numbers.c
+++ b/interesting-numbers.c
@@ -95,20 +95,20 @@ unsigned long get_interesting_value(void)
low = (rand() & 0xf) ? low : plus_minus_two(low); // 1 in 16 call
plus_minus_two
#if __WORDSIZE != 32
- switch (rand() % 13) {
- case 0: return 0;
- case 1: return low;
- case 2: return 0x0000000100000000UL | low;
- case 3: return 0x7fffffff00000000UL | low;
- case 4: return 0x8000000000000000UL | low;
- case 5: return 0xffffffff00000000UL | low;
- case 6: return 0xffffffffffffff00UL | (rand() % 256);
- case 7: return 0xffffffffffffffffUL - page_size;
- case 8: return PAGE_OFFSET | (low << 4);
- case 9: return KERNEL_ADDR | (low & 0xffffff);
- case 10: return MODULE_ADDR | (low & 0xffffff);
- case 11: return per_arch_interesting_addr(low);
- case 12: return (low << 32);
+ if (rand_bool()) { // FIXME: This should likely be less aggressive
than 50/50
+ switch (rand() % 11) {
+ case 0: return 0x0000000100000000UL | low;
+ case 1: return 0x7fffffff00000000UL | low;
+ case 2: return 0x8000000000000000UL | low;
+ case 3: return 0xffffffff00000000UL | low;
+ case 4: return 0xffffffffffffff00UL | (rand() & 0xff);
+ case 5: return 0xffffffffffffffffUL - page_size;
+ case 6: return PAGE_OFFSET | (low << 4);
+ case 7: return KERNEL_ADDR | (low & 0xffffff);
+ case 8: return MODULE_ADDR | (low & 0xffffff);
+ case 9: return per_arch_interesting_addr(low);
+ case 10: return (low << 32);
+ }
}
#endif /* __WORDSIZE */
--
1.9.1
--
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