Description
In the Linux kernel, the following vulnerability has been resolved: riscv: Sync efi page table's kernel mappings before switching The EFI page table is initially created as a copy of the kernel page table. With VMAP_STACK enabled, kernel stacks are allocated in the vmalloc area: if the stack is allocated in a new PGD (one that was not present at the moment of the efi page table creation or not synced in a previous vmalloc fault), the kernel will take a trap when switching to the efi page table when the vmalloc kernel stack is accessed, resulting in a kernel panic. Fix that by updating the efi kernel mappings before switching to the efi page table.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b91540d52a08b65eb6a2b09132e1bd54fa82754c to < fa7a7d185ef380546b4b1fed6f84f31dbae8cec7affectedb91540d52a08b65eb6a2b09132e1bd54fa82754c to < 96f479383d92944406d4b3f2bc03c2f640def9f1affectedb91540d52a08b65eb6a2b09132e1bd54fa82754c to < 3f105a742725a1b78766a55169f1d827732e62b8affected
Linux Linux
Default version status: affected
5.10affected0 to < 5.10unaffected5.15.82 to ≤ 5.15.*unaffected6.0.12 to ≤ 6.0.*unaffected6.1 to ≤ *unaffected