[Qemu-devel] [PULL 01/16] monitor: Fix return type of monitor_fdset_dup_fd_find

[Markus Armbruster <armbru@redhat.com>]

From: Yury Kotov <yury-kotov@yandex-team.ru>

monitor_fdset_dup_fd_find_remove() and monitor_fdset_dup_fd_find()
return mon_fdset->id which is int64_t. Downcasting from int64_t to int
leads to a bug with removing fd from fdset with id >= 2^32.
So, fix return types for these function.

Signed-off-by: Yury Kotov <yury-kotov@yandex-team.ru>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190523094433.30297-1-yury-kotov@yandex-team.ru>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 include/monitor/monitor.h | 2 +-
 monitor.c                 | 4 ++--
 stubs/fdset.c             | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index 06cfcd8f36..1e1d6d2269 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -44,6 +44,6 @@ AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id,
 int monitor_fdset_get_fd(int64_t fdset_id, int flags);
 int monitor_fdset_dup_fd_add(int64_t fdset_id, int dup_fd);
 void monitor_fdset_dup_fd_remove(int dup_fd);
-int monitor_fdset_dup_fd_find(int dup_fd);
+int64_t monitor_fdset_dup_fd_find(int dup_fd);
 
 #endif /* MONITOR_H */
diff --git a/monitor.c b/monitor.c
index 5c5cbe254a..dce3496920 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2604,7 +2604,7 @@ err:
     return -1;
 }
 
-static int monitor_fdset_dup_fd_find_remove(int dup_fd, bool remove)
+static int64_t monitor_fdset_dup_fd_find_remove(int dup_fd, bool remove)
 {
     MonFdset *mon_fdset;
     MonFdsetFd *mon_fdset_fd_dup;
@@ -2632,7 +2632,7 @@ err:
     return -1;
 }
 
-int monitor_fdset_dup_fd_find(int dup_fd)
+int64_t monitor_fdset_dup_fd_find(int dup_fd)
 {
     return monitor_fdset_dup_fd_find_remove(dup_fd, false);
 }
diff --git a/stubs/fdset.c b/stubs/fdset.c
index f3d9980b7e..67dd5e1d34 100644
--- a/stubs/fdset.c
+++ b/stubs/fdset.c
@@ -6,7 +6,7 @@ int monitor_fdset_dup_fd_add(int64_t fdset_id, int dup_fd)
     return -1;
 }
 
-int monitor_fdset_dup_fd_find(int dup_fd)
+int64_t monitor_fdset_dup_fd_find(int dup_fd)
 {
     return -1;
 }
-- 
2.21.0