1e2cc9b200
This bug was introduced with the change to use softdep_bp_to_mp() in January 2018 changes -r327723 and -r327821. The softdep_bp_to_mp() function failed to include VSOCK as one of the valid cases. Although local-domain sockets do not allocate blocks in the filesystem, they will allocate blocks if they use extended attributes (such as ACLs). Thus, softdep_bp_to_mp() needs to return a non-NULL mount pointer when presented with a socket vnode so that the soft updates write complete will properly process the soft updates structures associated with the extended attribute blocks. It was the failure to process these soft updates structures, thus leaving them hanging off the buffer, which lead to the "panic: softdep_deallocate_dependencies: dangling deps" when trying to clean up the buffer after it was written. PR: 230962 Reported by: 2t8mr7kx9f@protonmail.com Reviewed by: kib Tested by: Peter Holm MFC after: 1 week Sponsored by: Netflix |
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