[sr-dev] git:master:9560e973: tls_wolfssl: fix possible uninitialised variable

Module: kamailio Branch: master Commit: 9560e973807bc454dab84bdfd5ac0e300c847864 URL: https://github.com/kamailio/kamailio/commit/9560e973807bc454dab84bdfd5ac0e3… Author: S-P Chan &lt;shihping.chan(a)gmail.com&gt; Committer: S-P Chan &lt;shihping.chan(a)gmail.com&gt; Date: 2024-01-29T20:36:43+08:00 tls_wolfssl: fix possible uninitialised variable --- Modified: src/modules/tls_wolfssl/tls_server.c --- Diff: https://github.com/kamailio/kamailio/commit/9560e973807bc454dab84bdfd5ac0e3… Patch: https://github.com/kamailio/kamailio/commit/9560e973807bc454dab84bdfd5ac0e3… --- diff --git a/src/modules/tls_wolfssl/tls_server.c b/src/modules/tls_wolfssl/tls_server.c index 82145377335..f3c69839e28 100644 --- a/src/modules/tls_wolfssl/tls_server.c +++ b/src/modules/tls_wolfssl/tls_server.c @@ -669,8 +669,8 @@ void tls_h_tcpconn_close_f(struct tcp_connection *c, int fd) * Since this is a close, we don't want to queue the write * (if it can't write immediately, just fail silently) */ - wr_used = wolfSSL_BIO_pending(rwbio); /* use 2-pass read for wolfSSL ring buffer */ + wr_used = wolfSSL_BIO_pending(rwbio); if(wr_used) { for(nr = 0; nr < wr_used;) { npos = wolfSSL_BIO_read(rwbio, wr_buf + nr, wr_used - nr); @@ -728,7 +728,7 @@ int tls_h_encode_f(struct tcp_connection *c, const char **pbuf, WOLFSSL_BIO *rwbio; struct tls_extra_data *tls_c; static unsigned char wr_buf[TLS_WR_MBUF_SZ]; - size_t wr_used, nr, npos; + size_t wr_used = 0, nr, npos; int ssl_error; char *err_src; @@ -918,6 +918,7 @@ int tls_h_encode_f(struct tcp_connection *c, const char **pbuf, } end: /* use 2-pass read for wolfSSL ring buffer */ + wr_used = wolfSSL_BIO_pending(rwbio); for(nr = 0; nr < wr_used;) { npos = wolfSSL_BIO_read(rwbio, wr_buf + nr, wr_used - nr); if(npos <= 0) @@ -941,6 +942,7 @@ int tls_h_encode_f(struct tcp_connection *c, const char **pbuf, c->state = S_CONN_EOF; c->flags |= F_CONN_FORCE_EOF; /* use 2-pass read for wolfSSL ring buffer */ + wr_used = wolfSSL_BIO_pending(rwbio); for(nr = 0; nr < wr_used;) { npos = wolfSSL_BIO_read(rwbio, wr_buf + nr, wr_used - nr); if(npos <= 0) @@ -991,7 +993,7 @@ int tls_h_read_f(struct tcp_connection *c, rd_conn_flags_t *flags) WOLFSSL_BIO *rwbio; unsigned char rd_buf[TLS_RD_MBUF_SZ]; unsigned char wr_buf[TLS_WR_MBUF_SZ]; - size_t wr_used, rd_pending, rd_unused; + size_t wr_used, rd_unused; size_t nr, npos, nw; struct tls_extra_data *tls_c; int n, flush_flags; @@ -1040,18 +1042,18 @@ int tls_h_read_f(struct tcp_connection *c, rd_conn_flags_t *flags) if(unlikely(bytes_read < 0)) { goto error; } - rd_pending = bytes_read; + /* * use 2-pass write for wolfSSL ring buffer * fixed in 4f1d777090, post-v5.6.6-stable */ - for(nw = 0; nw < rd_pending;) { - npos = wolfSSL_BIO_write(rwbio, rd_buf + nw, rd_pending - nw); + for(nw = 0; nw < bytes_read;) { + npos = wolfSSL_BIO_write(rwbio, rd_buf + nw, bytes_read - nw); if(npos <= 0) break; nw += npos; } - assert(nw == rd_pending); + assert(nw == bytes_read); } continue_ssl_read: ssl_error = WOLFSSL_ERROR_NONE; @@ -1213,11 +1215,6 @@ int tls_h_read_f(struct tcp_connection *c, rd_conn_flags_t *flags) } /* quickly catch bugs: segfault if accessed and not set */ lock_release(&c->write_lock); - rd_unused = wolfSSL_BIO_wpending(rwbio); - if(rd_unused) { - LM_WARN("==== SSL unconsumed encrypted data rd_unused = %d\n", - (int)rd_unused); - } switch(ssl_error) { case WOLFSSL_ERROR_NONE: if(unlikely(n < 0)) { @@ -1233,12 +1230,11 @@ int tls_h_read_f(struct tcp_connection *c, rd_conn_flags_t *flags) TLS_RD_TRACE("(%p, %p) SSL_ERROR_WANT_READ *flags=%d\n", c, flags, *flags); /* needs to read more data */ - //if(unlikely(rd.pos != rd.used)) { - if(unlikely(wolfSSL_BIO_wpending(rwbio) > 0)) { + if(unlikely((rd_unused = wolfSSL_BIO_wpending(rwbio)))) { /* data still in the read buffer */ BUG("SSL_ERROR_WANT_READ but data still in" - " the rbio (%p, %d bytes at %d)\n", - rd_buf, (int)rd_unused, (int)(rd_pending - rd_unused)); + " the rbio (%d bytes)\n", + (int)rd_unused); goto bug; } if(unlikely((*flags & (RD_CONN_EOF | RD_CONN_SHORT_READ)) == 0)