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ext4: Fix the NULL reference in double_down_write_data_sem()
authorAkira Fujita <a-fujita@rs.jp.nec.com>
Thu, 4 Mar 2010 05:34:58 +0000 (00:34 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Thu, 4 Mar 2010 05:34:58 +0000 (00:34 -0500)
commit7247c0caa23d94a1cb6b307edba9dc45fb0798d4
tree435dd65425ea98ce4e10396f27c7a2f02dde15c8tree | snapshot (tar.gz zip)
parent5fd5249aa36fad98c9fd5edced352939e54f9324commit | diff
ext4: Fix the NULL reference in double_down_write_data_sem()

If EXT4_IOC_MOVE_EXT ioctl is called with NULL donor_fd, fget() in
ext4_ioctl() gets inappropriate file structure for donor; so we need
to do this check earlier, before calling double_down_write_data_sem().

Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
fs/ext4/move_extent.c diff | blob | blame | history