mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-08-31 08:15:07 -04:00
2ae8e7afbc
Three small ownership-state cleanups land the transport in a state that lets future reviewers reason about each pointer locally rather than tracing the whole reply path: rpcrdma_rep_put() clears rep->rr_rqst before the rep enters rb_free_reps so that no rep on the free list still carries a stale rqst pointer. rpcrdma_reply_handler() and rpcrdma_unpin_rqst() are the only sites that set rr_rqst; rpcrdma_reply_handler() hands the rep through rpcrdma_rep_put(), and rpcrdma_unpin_rqst() NULLs rr_rqst directly because its error path abandons the rep for teardown cleanup rather than returning it to rb_free_reps. rpcrdma_reply_put() NULLs req->rl_reply before calling rpcrdma_rep_put(). The previous order placed the rep on rb_free_reps while req->rl_reply still pointed at it; the window was harmless because xprt_rdma_free_slot() holds the req exclusively across the pair, but closing it makes the invariant 'rep on rb_free_reps implies no req references it' strictly checkable. rpcrdma_sendctx_unmap() and rpcrdma_sendctx_cancel() clear req->rl_sendctx after dropping the sendctx pointer in the sendctx ring. Without this, req->rl_sendctx survives across Send completion and points at a sendctx that may already have been reassigned by rpcrdma_sendctx_get_locked() to a different req. No caller dereferences the stale pointer today -- rpcrdma_prepare_send_sges() overwrites it before the next Send -- but a NULL is a more honest representation of 'the Send is no longer outstanding' and lets the assertion patch that follows trip on any future regression. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <anna.schumaker@hammerspace.com>