Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:  perf: RISC-V: store available counter mask as bitmap  The available-counter mask was a single unsigned long, but iteration uses RISCV_MAX_COUNTERS, which is 64. On RV32 that reads past the object. Filling with an unsigned-long bit at index 32 and above is also wrong.  Use DECLARE_BITMAP and set_bit/bitmap helpers. Walk each bitmap word into CFG_MATCH when checking events, when allocating an index, and when stopping all counters. Set the counter base to i times BITS_PER_LONG. Share the CFG_MATCH ecall through a small helper so the 32-bit argument split is not duplicated. On qemu-system-riscv32 the probe bitmap has bits above XLEN set, so the first word alone is not enough.  [pjw@kernel.org: updated to apply; fixed checkpatch.pl issues]
Data source: kernel.org (416baaa9-dc9f-4396-8d5f-8c081fb06d67)