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authorAkira Fujita <a-fujita@rs.jp.nec.com>2009-09-16 14:25:39 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-09-16 14:25:39 -0400
commitc40ce3c9ea97425a12d7e44031a98fe50add6fc1 (patch)
tree2150e1dbbcbf42c8293a887976a648fceaf8da73 /fs/ext4/ext4.h
parent347fa6f1c7cb5df2b38d3c9167cfe242ce0cd1da (diff)
ext4: Fix different block exchange issue in EXT4_IOC_MOVE_EXT
If logical block offset of original file which is passed to EXT4_IOC_MOVE_EXT is different from donor file's, a calculation error occurs in ext4_calc_swap_extents(), therefore wrong block is exchanged between original file and donor file. As a result, we hit ext4_error() in check_block_validity(). To detect the logical offset difference in EXT4_IOC_MOVE_EXT, add checks to mext_calc_swap_extents() and handle it as error, since data exchange must be done between the same blocks in EXT4_IOC_MOVE_EXT. Reported-by: Peng Tao <bergwolf@gmail.com> Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
0 files changed, 0 insertions, 0 deletions