Re: [PATCH] block/copy-before-write: wait for conflicts when read locking to avoid assertion failure

On 11.07.24 16:36, Fiona Ebner wrote: There is no protection against two callers of cbw_snapshot_read_lock() calling reqlist_init_req() with overlapping ranges, and reqlist_init_req() asserts that there are no conflicting requests. In particular, two cbw_co_snapshot_block_status() callers can

[PATCH] block/copy-before-write: wait for conflicts when read locking to avoid assertion failure

There is no protection against two callers of cbw_snapshot_read_lock() calling reqlist_init_req() with overlapping ranges, and reqlist_init_req() asserts that there are no conflicting requests. In particular, two cbw_co_snapshot_block_status() callers can race, with the second calling