[Bug 25352] resizing ext4 will corrupt filesystem

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https://bugzilla.kernel.org/show_bug.cgi?id=25352





--- Comment #4 from Kees Cook <kees@xxxxxxxxxxx>  2010-12-21 04:26:12 ---
Thanks for tracking it down! After a fsck, I'm still seeing fs corruption,
unfortunately:

[177266.375628] EXT4-fs error (device dm-1): htree_dirblock_to_tree:586: inode
#12255304: block 88074025: comm rm: bad entry in directory: rec_len is smaller
than minimal - offset=0(4096), inode=0, rec_len=0, name_len=0
[177266.375872] EXT4-fs error (device dm-1): htree_dirblock_to_tree:586: inode
#12255304: block 88074026: comm rm: bad entry in directory: rec_len is smaller
than minimal - offset=0(8192), inode=0, rec_len=0, name_len=0
[177266.376135] EXT4-fs error (device dm-1): empty_dir:1922: inode #12255304:
block 88074025: comm rm: bad entry in directory: rec_len is smaller than
minimal - offset=0(4096), inode=0, rec_len=0, name_len=0
[177266.376360] EXT4-fs error (device dm-1): empty_dir:1922: inode #12255304:
block 88074026: comm rm: bad entry in directory: rec_len is smaller than
minimal - offset=0(8192), inode=0, rec_len=0, name_len=0

fsck didn't notice this problem, but walking the tree seems to trigger it. I've
been trying to clean it up by just removing the offending directory, but it I
figured I'd mention it since it seems to be a problem that fsck -f didn't see.

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