Files
linux/fs
Utako Kusaka 29ae07b702 ext4: Fix overflow caused by missing cast in ext4_fallocate()
The logical block number in map.l_blk is a __u32, and so before we
shift it left, by the block size, we neeed cast it to a 64-bit size.

Otherwise i_size can be corrupted on an ENOSPC.

# df -T /mnt/mp1
Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/sda6     ext4     9843276    153056   9190200   2% /mnt/mp1
# fallocate -o 0 -l 2199023251456 /mnt/mp1/testfile
fallocate: /mnt/mp1/testfile: fallocate failed: No space left on device
# stat /mnt/mp1/testfile
  File: `/mnt/mp1/testfile'
  Size: 4293656576	Blocks: 19380440   IO Block: 4096   regular file
Device: 806h/2054d	Inode: 12          Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2011-07-25 13:01:31.414490496 +0900
Modify: 2011-07-25 13:01:31.414490496 +0900
Change: 2011-07-25 13:01:31.454490495 +0900

Signed-off-by: Utako Kusaka <u-kusaka@wm.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
--
 fs/ext4/extents.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
2011-07-27 22:11:20 -04:00
..
2011-03-31 11:26:23 -03:00
2011-03-31 11:26:23 -03:00
2011-03-31 11:26:23 -03:00
2011-06-07 21:36:45 -07:00
2011-05-19 16:55:28 +09:30
2011-03-10 08:52:07 +01:00
2011-06-03 18:24:58 -04:00
2011-06-07 08:50:59 -04:00
2011-03-31 11:26:23 -03:00
…
2011-03-31 11:26:23 -03:00
2011-06-03 18:24:58 -04:00
2011-03-10 08:52:07 +01:00
2011-04-14 16:06:56 -07:00
2011-03-31 11:26:23 -03:00
2011-05-27 09:43:00 -04:00
2011-03-21 00:16:08 -04:00
…
2011-05-26 07:26:50 -04:00
2011-05-26 10:01:43 -06:00
2011-06-20 10:45:56 -04:00
2011-03-21 01:10:41 -04:00
…
…
…
2011-05-23 19:58:53 +02:00
…
2011-03-14 09:15:28 -04:00
2011-06-03 18:24:58 -04:00