From: Ilya Dryomov <idryomov@gmail.com>
Date: Tue, 8 Nov 2011 22:08:15 +0000 (+0200)
Subject: Btrfs: avoid null dereference and leaks when bailing from open_ctree()
X-Git-Tag: v3.2-rc2~22^2~9^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d34b2789538befa45a68a191dc12e0886a69f7d;p=pandora-kernel.git

Btrfs: avoid null dereference and leaks when bailing from open_ctree()

Fix bugs introduced by 6c41761f.  Firstly, after failing to allocate any
of the tree roots (first 'goto fail' in open_ctree()) we would
dereference a NULL fs_info pointer in free_fs_info().  Secondly, after
failures from init_srcu_struct(), setup_bdi() and new_inode() we would
leak all earlier allocated roots: fs_info fields haven't been
initialized yet so free_fs_info() is rendered useless.

Fix this by initializing fs_info pointer and fs_info fields before any
allocations happen.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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