btrfs: deal with missing root in sample_block_group_extent_item()

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In case the root does not exists, which is unexpected, btrfs_extent_root()
returns NULL, but we ignore that and so if it happens we can trigger a
NULL pointer dereference later. So verify if we found the root and log an
error message in case it's missing.

Reviewed-by: Boris Burkov <boris@bur.io>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Filipe Manana 2026-01-21 20:48:35 +00:00 • committed by David Sterba

parent 79d51b5c7a

commit a8bec25e01

1 changed files with 6 additions and 0 deletions

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fs/btrfs/block-group.c

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