core dump: real_parent ppid

The pr_ppid field reported in core dumps should match what
getppid() would have returned to that process, regardless of
whether a debugger is attached.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index ba8de7c..f0b3171 100644 (file)
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1384,7 +1384,7 @@ static void fill_prstatus(struct elf_prstatus *prstatus,
        prstatus->pr_sigpend = p->pending.signal.sig[0];
        prstatus->pr_sighold = p->blocked.sig[0];
        prstatus->pr_pid = task_pid_vnr(p);
-       prstatus->pr_ppid = task_pid_vnr(p->parent);
+       prstatus->pr_ppid = task_pid_vnr(p->real_parent);
        prstatus->pr_pgrp = task_pgrp_vnr(p);
        prstatus->pr_sid = task_session_vnr(p);
        if (thread_group_leader(p)) {
@@ -1430,7 +1430,7 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
        psinfo->pr_psargs[len] = 0;
 
        psinfo->pr_pid = task_pid_vnr(p);
-       psinfo->pr_ppid = task_pid_vnr(p->parent);
+       psinfo->pr_ppid = task_pid_vnr(p->real_parent);
        psinfo->pr_pgrp = task_pgrp_vnr(p);
        psinfo->pr_sid = task_session_vnr(p);