diff options
| author | Dennis Zhou <dennis@kernel.org> | 2019-02-21 15:54:11 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-15 11:54:11 +0200 |
| commit | 526972e95ef96cd55313686dbf14202815671f6f (patch) | |
| tree | 29742869e53df3f2592d6634a0e6b072d790b831 /include | |
| parent | d4d5dce6d32961a0a2f86352a91b643bb2365d6f (diff) | |
percpu: do not search past bitmap when allocating an area
[ Upstream commit 8c43004af01635cc9fbb11031d070e5e0d327ef2 ]
pcpu_find_block_fit() guarantees that a fit is found within
PCPU_BITMAP_BLOCK_BITS. Iteration is used to determine the first fit as
it compares against the block's contig_hint. This can lead to
incorrectly scanning past the end of the bitmap. The behavior was okay
given the check after for bit_off >= end and the correctness of the
hints from pcpu_find_block_fit().
This patch fixes this by bounding the end offset by the number of bits
in a chunk.
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions