CRED: Fix commit_creds() on a process that has no mm
Fix commit_creds()'s handling of a process that has no mm (such as one that is calling or has called daemonize()). commit_creds() should check to see if task->mm is not NULL before calling set_dumpable() on it. Reported-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
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@ -372,7 +372,8 @@ int commit_creds(struct cred *new)
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old->fsuid != new->fsuid ||
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old->fsgid != new->fsgid ||
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!cap_issubset(new->cap_permitted, old->cap_permitted)) {
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set_dumpable(task->mm, suid_dumpable);
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if (task->mm)
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set_dumpable(task->mm, suid_dumpable);
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task->pdeath_signal = 0;
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smp_wmb();
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}
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