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ext4: add sanity checking to count_overhead()
authorTheodore Ts'o <tytso@mit.edu>
Fri, 18 Nov 2016 18:37:47 +0000 (13:37 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 6 Jan 2017 10:16:22 +0000 (11:16 +0100)
commit1bfcffbb88017c09c1a469507616c88a27037757
tree1ea4592d58076efc740efaf2945e520113dbcdb5tree | snapshot
parent9689eb99ce0f2ea904f7959022e6c1fdee158db1commit | diff
ext4: add sanity checking to count_overhead()

commit c48ae41bafe31e9a66d8be2ced4e42a6b57fa814 upstream.

The commit "ext4: sanity check the block and cluster size at mount
time" should prevent any problems, but in case the superblock is
modified while the file system is mounted, add an extra safety check
to make sure we won't overrun the allocated buffer.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/ext4/super.c diff | blob | blame | history
Arne's tree of linux kernel.