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Red Hat Bugzilla – Attachment 311421 Details for
Bug 454494
oops in free_uid when using smbd
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[patch]
proposed patch
linux-kernel-test.patch (text/plain), 709 bytes, created by
Anton Arapov
on 2008-07-09 21:00:07 UTC
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Description:
proposed patch
Filename:
MIME Type:
Creator:
Anton Arapov
Created:
2008-07-09 21:00:07 UTC
Size:
709 bytes
patch
obsolete
> kernel/user.c | 11 +++++++++++ > 1 files changed, 11 insertions(+), 0 deletions(-) > >diff --git a/kernel/user.c b/kernel/user.c >index 6408c04..220e586 100644 >--- a/kernel/user.c >+++ b/kernel/user.c >@@ -187,6 +187,17 @@ void switch_uid(struct user_struct *new_user) > atomic_dec(&old_user->processes); > switch_uid_keyring(new_user); > current->user = new_user; >+ >+ /* >+ * We need to synchronize with __sigqueue_alloc() >+ * doing a get_uid(p->user).. If that saw the old >+ * user value, we need to wait until it has exited >+ * its critical region before we can free the old >+ * structure. >+ */ >+ smp_mb(); >+ spin_unlock_wait(¤t->sighand->siglock); >+ > free_uid(old_user); > suid_keys(current); > }
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bug 454494
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