btrfs: check if there is space for chunk item when validating sys chunk array

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We checked if have enough remaining space for a key before dereferencing a
key, but we then dereference a chunk item, to get the number of stripes,
without checking if there is space for the item. So add a check to see if
there is enough space for a chunk item before dereferencing the item to
extract the stripe count.

Fixes: 2a9bb78cfd ("btrfs: validate system chunk array at btrfs_validate_super()")
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 2026-09-16 16:49:37 +01:00 • committed by David Sterba

parent 97fcd34aa9

commit aeab4c6287

1 changed files with 4 additions and 0 deletions

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fs/btrfs/disk-io.c

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