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fs/namespace: reject bufsize < sizeof(struct statmount) in prepare_kstatmount() - #2618
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…tatmount() In prepare_kstatmount(), kstatmount.buf_size is initialized from the caller's bufsize argument without rejecting buffers smaller than sizeof(struct statmount), allowing string offset calculations relative to sizeof(struct statmount) to underflow or write past the user buffer. Reject bufsize < sizeof(struct statmount) in prepare_kstatmount(). Fixes: 68385d7 ("statmount: simplify string option retrieval") Assisted-by: LLM Signed-off-by: Hui Peng <benquike@gmail.com>
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Series: https://patchwork.kernel.org/project/linux-fsdevel/list/?series=1169454
Submitter: Hui Peng
Version: 1
Patches: 1/1
Message-ID:
<20260919221732.3707664-1-benquike@gmail.com>Base: vfs.base.ci
Lore: https://lore.kernel.org/linux-fsdevel/20260919221732.3707664-1-benquike@gmail.com
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