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SubjectRe: Deadlock on the mm->mmap_sem
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Andrea Arcangeli <andrea@suse.de> wrote:
> the process doesn't need to lock multiple mm_structs at the same time.

fork, ptrace, /proc/pid/mem, /proc/pid/maps

All have to be able to lock two process's mm_structs simultaneously, even if
it's indirectly through copy_to_user() or copy_from_user().

David
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