9070c9f2f3
getpidcon() might set con to NULL, even when it returned a 0 return
code[0]. The subsequent strlen(con) will then cause a segfault.
Alternatively the behaviour could also be changed in getpidcon. I
don't know whether the libselinux folks are comitted to the current
behaviour, but the getpidcon man page doesn't really make it obvious
this case could happen.
[0] fb7f35495f/libselinux/src/procattr.c (L155-L158)
(cherry picked from commit ff868eaadecde2568d1e08a375ec8a3b327984fa)
(cherry picked from commit 4119d25e621b5e5b7860e971092239379768081c)
System and Service Manager
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