btree: catch NULL value before it does harm
authorJoern Engel <joern@logfs.org>
Thu, 7 Jun 2012 21:21:14 +0000 (14:21 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 7 Jun 2012 21:43:55 +0000 (14:43 -0700)
commit39caa0916ef27cf1da5026eb708a2b8413156f75
tree8cabf096e8a485ac623883ad57064ca1d18f253b
parentcbf8ae32f66a9ceb8907ad9e16663c2a29e48990
btree: catch NULL value before it does harm

Storing NULL values in the btree is illegal and can lead to memory
corruption and possible other fun as well.  Catch it on insert, instead
of waiting for the inevitable.

Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/btree.c