virtio_fs: read the vring size under virtio_fs_mutex in ->get_tree - #2663
Open
vfsci-bot[bot] wants to merge 1 commit into
Open
vfsci-bot[bot] wants to merge 1 commit into
vfsci-bot[bot] wants to merge 1 commit into
Conversation
The vring size was read after virtio_fs_find_instance() had dropped virtio_fs_mutex, so a concurrent virtio_fs_remove() could free the virtqueue first. The reference from the lookup keeps the virtio_fs alive, but not its virtqueues. Hold the mutex across the lookup and the read. This issue was found by an in-house static analysis tool. Fixes: a7f0d7a ("virtiofs: split requests that exceed virtqueue size") Cc: stable@vger.kernel.org Assisted-by: Codex:gpt-5.6 Co-developed-by: Song Li <songl@zju.edu.cn> Signed-off-by: Song Li <songl@zju.edu.cn> Signed-off-by: Fan Wu <fanwu01@zju.edu.cn>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Series: https://patchwork.kernel.org/project/linux-fsdevel/list/?series=1171101
Submitter: Fan Wu
Version: 1
Patches: 1/1
Message-ID:
<20260922081318.321686-1-fanwu01@zju.edu.cn>Base: vfs.base.ci
Lore: https://lore.kernel.org/linux-fsdevel/20260922081318.321686-1-fanwu01@zju.edu.cn
Automated by ml2pr