From: David Sterba <dsterba@suse.cz>
Date: Mon, 19 Jan 2015 13:21:02 +0000 (+0100)
Subject: btrfs: sync ioctl, handle errors after transaction start
X-Git-Tag: fixes-v4.0-rc1~254^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98bd5c547ef2300f915fc1adce5b6f25c195d4d4;p=pandora-kernel.git

btrfs: sync ioctl, handle errors after transaction start

The version merged to 3.19 did not handle errors from start_trancaction
and could pass an invalid pointer to commit_transaction.

Fixes: 6b5fe46dfa52441f ("btrfs: do commit in sync_fs if there are pending changes")
Reported-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
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