tree d1bb3671fed7746110175a480b72a543bfd3d271
parent 82023bb7f75b0052f40d3e74169d191c3e4e6286
author Al Viro <viro@ZenIV.linux.org.uk> 1384985796 +0000
committer Linus Torvalds <torvalds@linux-foundation.org> 1384986134 -0800

Wrong page freed on preallocate_pmds() failure exit

Note that pmds[i] is simply uninitialized at that point...

Granted, it's very hard to hit (you need split page locks *and*
kmalloc(sizeof(spinlock_t), GFP_KERNEL) failing), but the code is
obviously bogus.

Introduced by commit 09ef4939850a ("x86: add missed
pgtable_pmd_page_ctor/dtor calls for preallocated pmds")

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>