From 79efa8e7ab4282c8c5e3a917531d5c42452377a5 Mon Sep 17 00:00:00 2001
From: Evgeny Vereshchagin <evvers@ya.ru>
Date: Tue, 31 Jan 2017 19:04:20 +0300
Subject: [PATCH] coredump: really extract container cmdline (#5167)

Fixes:
```
root# systemd-nspawn -D ./cont/ --register=no /bin/sh -c '/bin/sh -c "kill -ABRT \$\$"'
...
Container cont failed with error code 134.

root# journalctl MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1 -o verbose | grep -i container_cmdline
...prints nothing...
...should be COREDUMP_CONTAINER_CMDLINE=systemd-nspawn -D ./cont/ --register=no /bin/sh -c /bin/sh -c "kill -ABRT \$\$"
```

Also, fixes CID #1368263
```
==352== 130 bytes in 1 blocks are definitely lost in loss record 1 of 2
==352==    at 0x4C2ED5F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==352==    by 0x4ED8581: greedy_realloc (alloc-util.c:57)
==352==    by 0x4ECAAD5: get_process_cmdline (process-util.c:147)
==352==    by 0x10E385: get_process_container_parent_cmdline (coredump.c:645)
==352==    by 0x112949: process_kernel (coredump.c:1240)
==352==    by 0x113003: main (coredump.c:1297)
==352==
```
(cherry picked from commit d3cba4eaf618ced1935a96e721b2fbcbad7694bb)
---
 src/coredump/coredump.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/coredump/coredump.c b/src/coredump/coredump.c
index 6bd0e925eb..1c5e72c835 100644
--- a/src/coredump/coredump.c
+++ b/src/coredump/coredump.c
@@ -642,7 +642,11 @@ static int get_process_container_parent_cmdline(pid_t pid, char** cmdline) {
         if (r < 0)
                 return r;
 
-        return get_process_cmdline(container_pid, 0, false, cmdline);
+        r = get_process_cmdline(container_pid, 0, false, cmdline);
+        if (r < 0)
+                return r;
+
+        return 1;
 }
 
 static int change_uid_gid(const char *context[]) {