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authorOleg Nesterov <oleg@redhat.com>2009-06-23 15:25:32 -0400
committerJames Morris <jmorris@namei.org>2009-06-24 10:20:58 -0400
commita893a84e8799270fbec5c3708d001650aab47138 (patch)
tree84669cc7ea99ba8510bbf2c3c0dd0823520f2daa /security
parent9e48858f7d36a6a3849f1d1b40c3bf5624b4ee7c (diff)
mm_for_maps: simplify, use ptrace_may_access()
It would be nice to kill __ptrace_may_access(). It requires task_lock(), but this lock is only needed to read mm->flags in the middle. Convert mm_for_maps() to use ptrace_may_access(), this also simplifies the code a little bit. Also, we do not need to take ->mmap_sem in advance. In fact I think mm_for_maps() should not play with ->mmap_sem at all, the caller should take this lock. With or without this patch, without ->cred_guard_mutex held we can race with exec() and get the new ->mm but check old creds. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions