dm: don't call report zones for more than the user requested

Don't call report zones for more zones than the user actually requested,
otherwise this can lead to out-of-bounds accesses in the callback
functions.

Such a situation can happen if the target's ->report_zones() callback
function returns 0 because we've reached the end of the target and then
restart the report zones on the second target.

We're again calling into ->report_zones() and ultimately into the user
supplied callback function but when we're not subtracting the number of
zones already processed this may lead to out-of-bounds accesses in the
user callbacks.

Signed-off-by: Johannes Thumshirn <[email protected]>
Reviewed-by: Damien Le Moal <[email protected]>
Fixes: d41003513e61 ("block: rework zone reporting")
Cc: [email protected] # v5.5+
Signed-off-by: Mike Snitzer <[email protected]>

0 files changed, 0 insertions, 0 deletions