Messages in this thread Patch in this message | | | Date | Tue, 17 Jul 2001 13:21:43 +0900 | From | Tachino Nobuhiro <> | Subject | [BUG 2.4.6] PPID of a process is set to itself |
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Hi,
When I am playing with clone system call, I found the case the cloned process becomes the zombie which is not reaped because the PPID of the process is set to itself. The test program are following.
#include <sched.h> #include <stdio.h> #include <unistd.h> #include <stdlib.h>
int stack[2048];
int func(void *p) { exit(0); }
int main(int argc, char *argv[]) { clone(func, &stack[2048], CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD, NULL);
sleep(1); exit(0); }
Following patch fixes the bug, but I don't know this is correct. Can someone please explain me why in forget_original_parent(), the parent of processes in a thread group is set to another process in the thread group?
diff -u -r linux.org/kernel/exit.c linux/kernel/exit.c --- linux.org/kernel/exit.c Sat May 5 06:44:06 2001 +++ linux/kernel/exit.c Tue Jul 17 11:06:59 2001 @@ -168,7 +168,7 @@ /* We dont want people slaying init */ p->exit_signal = SIGCHLD; p->self_exec_id++; - p->p_opptr = reaper; + p->p_opptr = p == reaper ? child_reaper : reaper; if (p->pdeath_signal) send_sig(p->pdeath_signal, p, 0); } } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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