072d916c1cf078f88c1beae2d24aba34ff259de4
. vfs read_only() assumes vnode->v_vmnt is non-NULL, but it can be NULL sometimes . e.g. fchmod() on UDS triggered NULL deref; add a check and add REQ_CHMOD to pfs so unix domain sockets can be fchmod()ded . add to test56 Change-Id: I83c840f101b647516897cc99fcf472116d762012
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