Make qio_channel_tls_shutdown thread-safe by using atomics when accessing tioc->shutdown.
Signed-off-by: Lukas Straub <lukasstra...@web.de> Acked-by: Stefan Hajnoczi <stefa...@redhat.com> Reviewed-by: Daniel P. Berrangé <berra...@redhat.com> --- io/channel-tls.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/io/channel-tls.c b/io/channel-tls.c index 388f019977..2ae1b92fc0 100644 --- a/io/channel-tls.c +++ b/io/channel-tls.c @@ -23,6 +23,7 @@ #include "qemu/module.h" #include "io/channel-tls.h" #include "trace.h" +#include "qemu/atomic.h" static ssize_t qio_channel_tls_write_handler(const char *buf, @@ -277,7 +278,8 @@ static ssize_t qio_channel_tls_readv(QIOChannel *ioc, return QIO_CHANNEL_ERR_BLOCK; } } else if (errno == ECONNABORTED && - (tioc->shutdown & QIO_CHANNEL_SHUTDOWN_READ)) { + (qatomic_load_acquire(&tioc->shutdown) & + QIO_CHANNEL_SHUTDOWN_READ)) { return 0; } @@ -361,7 +363,7 @@ static int qio_channel_tls_shutdown(QIOChannel *ioc, { QIOChannelTLS *tioc = QIO_CHANNEL_TLS(ioc); - tioc->shutdown |= how; + qatomic_or(&tioc->shutdown, how); return qio_channel_shutdown(tioc->master, how, errp); } -- 2.20.1
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