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bpf: Fix off-by-one error in bpf_mem_cache_idx()

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[ Upstream commit 36024d023d ]

According to the definition of sizes[NUM_CACHES], when the size passed
to bpf_mem_cache_size() is 256, it should return 6 instead 7.

Fixes: 7c8199e24f ("bpf: Introduce any context BPF specific memory allocator.")
Signed-off-by: Hou Tao <houtao1@huawei.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20230118084630.3750680-1-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hou Tao
2023-01-18 16:46:30 +08:00
committed by Greg Kroah-Hartman
parent ba32923bce
commit c32efcf9ff
1 changed files with 1 additions and 1 deletions
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2
kernel/bpf/memalloc.c
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@@ -71,7 +71,7 @@ static int bpf_mem_cache_idx(size_t size)
if (size <= 192)
return size_index[(size - 1) / 8] - 1;
return fls(size - 1) - 1;
return fls(size - 1) - 2;
}
#define NUM_CACHES 11