tree 2e92d122733505590c5df7906ac2590477b5806b
parent 955eff5acc8b8cd1c7d4eec0229c35eaabe013db
author Nick Piggin <npiggin@suse.de> 1172008689 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1172020215 -0800

[PATCH] fs: fix nobh data leak

nobh_prepare_write leaks data similarly to how simple_prepare_write did. Fix
by not marking the page uptodate until nobh_commit_write time. Again, this
could break weird use-cases, but none appear to exist in the tree.

We can safely remove the set_page_dirty, because as the comment says,
nobh_commit_write does set_page_dirty. If a filesystem wants to allocate
backing store for a page dirtied via mmap, page_mkwrite is the suggested
approach.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>