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(parent: 0814c3a) | patch
ext4: fix overflow caused by missing cast in ext4_resize_fs()
authorJerry Lee <jerrylee@qnap.com>
Sun, 6 Aug 2017 05:18:31 +0000 (01:18 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 11 Aug 2017 15:49:30 +0000 (08:49 -0700)
commit12353a00df25d5c8da8de8c60b705e5ccc436cfe
tree1d3a5931bea5019931cf99fff6c53a9c108ff211tree | snapshot
parent0814c3a9447ba284ef91b2d27755bf5a4514ca64commit | diff
ext4: fix overflow caused by missing cast in ext4_resize_fs()

commit aec51758ce10a9c847a62a48a168f8c804c6e053 upstream.

On a 32-bit platform, the value of n_blcoks_count may be wrong during
the file system is resized to size larger than 2^32 blocks.  This may
caused the superblock being corrupted with zero blocks count.

Fixes: 1c6bd7173d66
Signed-off-by: Jerry Lee <jerrylee@qnap.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/ext4/resize.c diff | blob | history
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