CVE-2024-46847 mm: vmalloc: ensure vmap_block is initialised before adding to queue

In the Linux kernel, the following vulnerability has been resolved: mm: vmalloc: ensure vmapblock is initialised before adding to queue Commit 8c61291fd850 "mm: fix incorrect vbq reference in purgefragmentedblock" extended the 'vmapblock' structure to contain a 'cpu' field which is set at...

CVE-2024-39474 mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL

In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: fix vmalloc which may return null if called with GFPNOFAIL commit a421ef303008 "mm: allow !GFPKERNEL allocations for kvmalloc" includes support for GFPNOFAIL, but it presents a conflict with commit dd544141b9eb...

CVE-2024-39474

CVE-2024-39474 involves a Linux kernel vmalloc regression where __GFP_NOFAIL allocations may return NULL, due to a race with OOM-killer flow and GFP_KERNEL handling. The fix updates vm_area_alloc_pages() to not check fatal_signal_pending() when __GFP_NOFAIL is set, preventing a NULL vmalloc() ret...