From: Hou Tao <houtao1@xxxxxxxxxx> Hi, The patch set tries to fix the problems found when testing ringbuf by using 4KB and 2GB size. Patch 1 fixes the probe of ring buffer map on host with 64KB page (e.g., an ARM64 host). Patch 2 & 3 fix the overflow of length when mmaping 2GB kernel ringbuf or user ringbuf on libbpf. Patch 4 just reject the reservation with invalid size. Please see individual patch for details. And comments are always welcome. Change Log: v2: * patch 1: use page size instead of adjust_ringbuf_sz(4096) as main_entries (suggested by Stanislav) * patch 2 & 3: use "mmap_sz" instead of "ro_size/wr_size" as name of mmap length (From Andrii) v1: https://lore.kernel.org/bpf/20221111092642.2333724-1-houtao@xxxxxxxxxxxxxxx Hou Tao (4): libbpf: Use page size as max_entries when probing ring buffer map libbpf: Handle size overflow for ringbuf mmap libbpf: Handle size overflow for user ringbuf mmap libbpf: Check the validity of size in user_ring_buffer__reserve() tools/lib/bpf/libbpf_probes.c | 2 +- tools/lib/bpf/ringbuf.c | 26 ++++++++++++++++++++++---- 2 files changed, 23 insertions(+), 5 deletions(-) -- 2.29.2
