bpf: Set uattr->batch.count as zero before batched update or deletion

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[ Upstream commit 06e5c999f1 ]

generic_map_{delete,update}_batch() doesn't set uattr->batch.count as
zero before it tries to allocate memory for key. If the memory
allocation fails, the value of uattr->batch.count will be incorrect.

Fix it by setting uattr->batch.count as zero beore batched update or
deletion.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20231208102355.2628918-6-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Hou Tao 2023-12-08 18:23:53 +08:00 • committed by Greg Kroah-Hartman

parent 7719e56b20

commit 5a44a664ab

1 changed files with 6 additions and 0 deletions

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kernel/bpf/syscall.c

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