liveupdate: Use refcount_t for FLB reference counts

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Use refcount_t instead of a raw integer to keep track of references on
incoming and outgoing FLBs. Using refcount_t provides protection from
overflow, underflow, and other issues.

Fixes: cab056f2aa ("liveupdate: luo_flb: introduce File-Lifecycle-Bound global state")
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Samiullah Khawaja <skhawaja@google.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Link: https://lore.kernel.org/r/20260423174032.3140399-2-dmatlack@google.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

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David Matlack 2026-04-23 17:40:28 +00:00 • committed by Mike Rapoport (Microsoft)

parent a1f8ed3451

commit d2850ff2f8

2 changed files with 12 additions and 13 deletions

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3

include/linux/liveupdate.h

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22

kernel/liveupdate/luo_flb.c

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