In sbi_domain.h, when checking if a memory region is a subset of
another, an undefined behavior arithmetic operation was caught
when sanitizing with UBSan (shift exponent __riscv_xlen).
This patch adds a check to handle the case where the region order
is __riscv_xlen, avoiding the illegal shift and ensuring the operation
remains defined.
Please let me know if there’s any other most suitable solution for
this bug.
Signed-off-by: Marcos Oduardo <marcos.oduardo@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260222235219.276432-1-marcos.oduardo@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>
3baca10015