diff options
| -rw-r--r-- | nptl/pthread_create.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index 5680687..b7073a8 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -83,9 +83,12 @@ late_init (void) (void) __libc_sigaction (SIGCANCEL, &sa, NULL); } - /* Install the handle to change the threads' uid/gid. */ + /* Install the handle to change the threads' uid/gid. Use + SA_ONSTACK because the signal may be sent to threads that are + running with custom stacks. (This is less likely for + SIGCANCEL.) */ sa.sa_sigaction = __nptl_setxid_sighandler; - sa.sa_flags = SA_SIGINFO | SA_RESTART; + sa.sa_flags = SA_ONSTACK | SA_SIGINFO | SA_RESTART; (void) __libc_sigaction (SIGSETXID, &sa, NULL); /* The parent process might have left the signals blocked. Just in |