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author | Eric Sandeen <sandeen@sandeen.net> | 2009-05-23 14:30:12 -0500 |
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committer | Felix Blyakher <felixb@sgi.com> | 2009-05-26 17:46:37 -0500 |
commit | 096324873f9c7172a17aff9db1356f4f01b77afe (patch) | |
tree | 676a1a98cd00c9c7ad1736930c5dc28acce8a192 /fs/xfs/linux-2.6 | |
parent | ec91d1335f478c5cd089d82ffbf936075c5f24c8 (diff) |
xfs: fix overflow in xfs_growfs_data_private
In the case where growing a filesystem would leave the last AG
too small, the fixup code has an overflow in the calculation
of the new size with one fewer ag, because "nagcount" is a 32
bit number. If the new filesystem has > 2^32 blocks in it
this causes a problem resulting in an EINVAL return from growfs:
# xfs_io -f -c "truncate 19998630180864" fsfile
# mkfs.xfs -f -bsize=4096 -dagsize=76288719b,size=3905982455b fsfile
# mount -o loop fsfile /mnt
# xfs_growfs /mnt
meta-data=/dev/loop0 isize=256 agcount=52,
agsize=76288719 blks
= sectsz=512 attr=2
data = bsize=4096 blocks=3905982455, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=32768, version=2
= sectsz=512 sunit=0 blks, lazy-count=0
realtime =none extsz=4096 blocks=0, rtextents=0
xfs_growfs: XFS_IOC_FSGROWFSDATA xfsctl failed: Invalid argument
Reported-by: richard.ems@cape-horn-eng.com
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6')
0 files changed, 0 insertions, 0 deletions