nbd: denial of service

ID ASA-201505-15
Type archlinux
Reporter Arch Linux
Modified 2015-05-26T00:00:00


Signal handlers themselves were entered only once, but they called posixly unsafe, non-reentrant functions, such as syslog(). If a signal was caught in the middle of the execution of such function, consequences were undefined. In practice, nbd-server was observed to deadlock during the execution of sigchld_handler().