🛡️ AZL-50809 — kernel

CVE-2024-47739 affecting package kernel for versions less than 5.15.173.1-1

In the Linux kernel, the following vulnerability has been resolved:

padata: use integer wrap around to prevent deadlock on seq_nr overflow

When submitting more than 2^32 padata objects to padata_do_serial, the

current sorting implementation incorrectly sorts padata objects with

overflowed seq_nr, causing them to be placed before existing objects in

the reorder list. This leads to a deadlock in the serialization process

as padata_find_next cannot match padata->seq_nr and pd->processed

because the padata instance with overflowed seq_nr will be selected

next.

To fix this, we use an unsigned integer wrap around to correctly sort

padata objects in scenarios with integer overflow.