As discussed, Linux 3.2.y needs a backport of the fixes for this, which I think are: 968dee7 ext4: fix hole punch failure when depth is greater than 0 89a4e48 ext4: fix kernel BUG on large-scale rm -rf commands Ben. On Sun, 2012-08-26 at 00:56 +0400, hrayr@infotech.am wrote: > > On Fri, 2012-08-24 at 03:30 +0400, Hrayr Grigoryan wrote: > >> Package: src:linux > >> Version: 3.2.23-1 > >> Severity: critical > >> Tags: lfs > >> Justification: causes serious data loss > >> > >> Dear Maintainer, > >> > >> When I'm trying to format file image with the command "mkfs -t ext4 > >> file.img", it returns the following errors > >> [ 142.328065] EXT4-fs error (device sdb1): ext4_ext_map_blocks:3769: > >> inode #12: comm mkfs.ext4: bad extent address lblock: 1022, depth: 2 > >> pblock 0 > >> [ 142.328387] EXT4-fs error (device sdb1): ext4_ext_map_blocks:3769: > >> inode #12: comm mkfs.ext4: bad extent address lblock: 1023, depth: 2 > >> pblock 0 > >> [ 142.328699] EXT4-fs error (device sdb1): ext4_ext_map_blocks:3769: > >> inode #12: comm mkfs.ext4: bad extent address lblock: 9254, depth: 2 > >> pblock 0 > >> [ 142.329018] EXT4-fs error (device sdb1): ext4_ext_map_blocks:3769: > >> inode #12: comm mkfs.ext4: bad extent address lblock: 1057, depth: 2 > >> pblock 0 > > > > So you have an ext4 filesystem in file.img, on top of an ext4 filesystem > > on /dev/sdb1? > yes, all are ext4, no other file systems I have on that machine. > > > > > >> The problem visible only for big images f.x. 160Gb and more. > >> I did the tests on different hardwares, but result the same. > > [...] > > > > How is test.img created, before you run mkfs? Is it a sparse file or > > does it have all data blocks allocated? > No it is not sparse file, test.img was created with the following command > dd if=/dev/zero of=test.img bs=1M count=160k > > > > Have you tested this on any other kernel versions (earlier or later)? > Yes, I have tested with the earlier versions, all earlier versions of > 3.x.x kernels have this bug. > > Hrayr. > > > > > > > Ben. > > > > -- > > Ben Hutchings > > Experience is what causes a person to make new mistakes instead of old > > ones. > > > > -- Ben Hutchings Quantity is no substitute for quality, but it's the only one we've got.
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