From bb5b56af4c3b9e43a698f01b70732c62d3642583 Mon Sep 17 00:00:00 2001 From: Andrea Grandi Date: Fri, 3 Feb 2017 05:46:17 +0000 Subject: Remove fd from the list when the engine clears the wait context before pause This fixes the num of fds added/removed returned by ASYNC_WAIT_CTX_get_changed_fds Previously, the numbers were not consistent with the fds actually written in the buffers since the fds that have been both added and removed are explicitly ignored in the loop. Reviewed-by: Rich Salz Reviewed-by: Matt Caswell (Merged from https://github.com/openssl/openssl/pull/2581) (cherry picked from commit f89dd6738a0ec2b6cfb05a3cc5fa38843dc27d2f) --- crypto/async/async_wait.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'crypto/async') diff --git a/crypto/async/async_wait.c b/crypto/async/async_wait.c index e5ecaeb5ee..50c150e8c5 100644 --- a/crypto/async/async_wait.c +++ b/crypto/async/async_wait.c @@ -148,6 +148,33 @@ int ASYNC_WAIT_CTX_clear_fd(ASYNC_WAIT_CTX *ctx, const void *key) continue; } if (curr->key == key) { + /* If fd has just been added, remove it from the list */ + if (curr->add == 1) { + if (ctx->fds == curr) { + ctx->fds = curr->next; + } + else { + struct fd_lookup_st *prev = ctx->fds; + while (prev->next != curr && prev->next != NULL) { + prev = prev->next; + } + if (prev->next == NULL) { + return 1; + } + prev->next = curr->next; + } + + /* + * The fd has just been added so it can't be used externally + * and it is safe to call the cleanup function here + */ + if (curr->cleanup != NULL) + curr->cleanup(ctx, curr->key, curr->fd, curr->custom_data); + OPENSSL_free(curr); + ctx->numadd--; + return 1; + } + /* * Mark it as deleted. We don't call cleanup if explicitly asked * to clear an fd. We assume the caller is going to do that (if -- cgit v1.2.3