Btrfs: Don't trust the superblock label and simply printk("%s") it

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Someone who is root or capable(CAP_SYS_ADMIN) could corrupt the
superblock and make Btrfs printk("%s") crash while holding the
uuid_mutex since nobody forces a limit on the string. Since the
uuid_mutex is significant, the system would be unusable
afterwards.

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

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Stefan Behrens 2012-11-05 13:10:49 +00:00 • committed by Josef Bacik

parent 109f2365f1

commit d03f918ab9

1 changed files with 5 additions and 2 deletions

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7

fs/btrfs/volumes.c

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