Re: [uclibc-ng-devel] Race condition in LinuxThread's sigaction wrapper

Hi I got report about race condition in LinuxThread's sigaction wrapper located in libpthread/linuxthreads/signals.c In sigaction wrapper A.1) override handler for new action to point at pthread_sighandler A.2) __libc_sigaction A.3) update global array (sighandler) used by pthread_sighandler with real action (from new) pthread_sighandler B.1) find real action (indexed by signal number) B.2) unconditionally execute action IIUC, if we receive signal in a window between A.2 and A.3 we are missing executing real action (likely we try to execute NULL). Does that make sense? Cheers Vladimir _______________________________________________ devel mailing list devel(a)uclibc-ng.org https://mailman.uclibc-ng.org/cgi-bin/mailman/listinfo/devel