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Make sure aligned_alloc size is a multiply of alignment

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Fix a ASan complaint.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2020-05-21 14:36:00 +01:00
parent 6a765fd085
commit f3fdbbfa92
1 changed files with 4 additions and 2 deletions
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6
include/linux/slab.h
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@ -20,9 +20,11 @@ static inline void *kmalloc(size_t size, gfp_t flags)
run_shrinkers(); run_shrinkers();
size_t alignment = min(rounddown_pow_of_two(size),
(size_t)PAGE_SIZE);
size = roundup(size, alignment);
p = size p = size
? aligned_alloc(min(rounddown_pow_of_two(size), ? aligned_alloc(alignment, size)
(size_t)PAGE_SIZE), size)
: malloc(0); : malloc(0);
if (p && (flags & __GFP_ZERO)) if (p && (flags & __GFP_ZERO))
memset(p, 0, size); memset(p, 0, size);