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authorDavidlohr Bueso <davidlohr@hp.com>2014-06-07 01:38:10 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-07 03:08:16 +0400
commitb951242a4f633462b9766171bc5be8a8dc3f3e12 (patch)
tree3e8dc9383920eb2c92c1820bfcebe1823cd8899e /fs/reiserfs
parentcccad5b983d2b0aa453879591ac4ab1c54ff9db6 (diff)
downloadlinux-b951242a4f633462b9766171bc5be8a8dc3f3e12.tar.xz
blackfin/ptrace: call find_vma with the mmap_sem held
Performing vma lookups without taking the mm->mmap_sem is asking for trouble. While doing the search, the vma in question can be modified or even removed before returning to the caller. Take the lock (shared) in order to avoid races while iterating through the vmacache and/or rbtree. Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Cc: Steven Miao <realmz6@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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