btrfs: zoned: clone zoned device info when cloning a device

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When cloning a btrfs_device, we're not cloning the associated
btrfs_zoned_device_info structure of the device in case of a zoned
filesystem.

Later on this leads to a NULL pointer dereference when accessing the
device's zone_info for instance when setting a zone as active.

This was uncovered by fstests' testcase btrfs/161.

CC: stable@vger.kernel.org # 5.15+
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Johannes Thumshirn 2022-11-04 07:12:33 -07:00 • committed by David Sterba

parent b75b51f886

commit 21e61ec6d0

3 changed files with 63 additions and 0 deletions

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12

fs/btrfs/volumes.c

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40

fs/btrfs/zoned.c

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11

fs/btrfs/zoned.h

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