From: Jaegeuk Kim Date: Wed, 15 Oct 2014 17:24:34 +0000 (-0700) Subject: f2fs: fix race conditon on truncation with inline_data X-Git-Tag: omap-for-v3.19/fixes-rc1~146^2~84 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ce86bf6f882381013e12b16bbb3921608c0f238;p=pandora-kernel.git f2fs: fix race conditon on truncation with inline_data Let's consider the following scenario. blkaddr[0] inline_data i_size i_blocks writepage truncate NEW X 4096 2 dirty page #0 NEW X 0 change i_size NEW X 0 2 f2fs_write_inline_data NEW X 0 2 get_dnode_of_data NEW X 0 2 truncate_data_blocks_range NULL O 0 1 memcpy(inline_data) NULL O 0 1 f2fs_put_dnode NULL O 0 1 f2fs_truncate NULL O 0 1 get_dnode_of_data NULL O 0 1 *invalid block addr* This patch adds checking inline_data flag during f2fs_truncate not to refer corrupted block indices. Signed-off-by: Jaegeuk Kim --- Reading git-diff-tree failed