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authorMichael S. Tsirkin <mst@redhat.com>2014-08-17 11:45:17 +0200
committerLuiz Capitulino <lcapitulino@redhat.com>2014-08-18 14:39:10 -0400
commitb3dd1b8c295636e64ceb14cdc4db6420d7319e38 (patch)
treee8455dfc57b74258a99088394bf2c6ba9a57ed40 /monitor.c
parent2928207ac1bb2751a1554ea0f9a9641179f51488 (diff)
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monitor: fix use after free
The function monitor_fdset_dup_fd_find_remove() references member of 'mon_fdset' which - when remove flag is set - may be freed in function monitor_fdset_cleanup(). remove is set by monitor_fdset_dup_fd_remove which in practice does not need the returned value, so make it void, and return -1 from monitor_fdset_dup_fd_find_remove. Reported-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Diffstat (limited to 'monitor.c')
-rw-r--r--monitor.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/monitor.c b/monitor.c
index 48f0fdc..34cee74 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2542,8 +2542,10 @@ static int monitor_fdset_dup_fd_find_remove(int dup_fd, bool remove)
if (QLIST_EMPTY(&mon_fdset->dup_fds)) {
monitor_fdset_cleanup(mon_fdset);
}
+ return -1;
+ } else {
+ return mon_fdset->id;
}
- return mon_fdset->id;
}
}
}
@@ -2555,9 +2557,9 @@ int monitor_fdset_dup_fd_find(int dup_fd)
return monitor_fdset_dup_fd_find_remove(dup_fd, false);
}
-int monitor_fdset_dup_fd_remove(int dup_fd)
+void monitor_fdset_dup_fd_remove(int dup_fd)
{
- return monitor_fdset_dup_fd_find_remove(dup_fd, true);
+ monitor_fdset_dup_fd_find_remove(dup_fd, true);
}
int monitor_handle_fd_param(Monitor *mon, const char *fdname)