From: Hou Tao <houtao1@xxxxxxxxxx>
Hi,
The patch set fixes some issues for bits iterator. Patch #1 fixes the
kmemleak problem of bits iterator. Patch #2~#3 fix the overflow problem
of nr_bits. Patch #4 fixes the potential stack corruption when bits
iterator is used on 32-bit host. Patch #5 adds more test cases for bits
iterator.
Please see the individual patches for more details. And comments are
always welcome.
---
v3:
* split the bits-iterator related patches from "Misc fixes for bpf"
patch set
* patch #1: use "!nr_bits || bits >= nr_bits" to stop the iteration
* patch #2: add a new helper for the overflow problem
* patch #3: decrease the limitation from 512 to 511 and check whether
nr_bytes is too large for bpf memory allocator explicitly
* patch #5: add two more test cases for bit iterator
v2: http://lore.kernel.org/bpf/d49fa2f4-f743-c763-7579-c3cab4dd88cb@xxxxxxxxxxxxxxx
Hou Tao (5):
bpf: Free dynamically allocated bits in bpf_iter_bits_destroy()
bpf: Add bpf_mem_alloc_check_size() helper
bpf: Check the validity of nr_words in bpf_iter_bits_new()
bpf: Use __u64 to save the bits in bits iterator
selftests/bpf: Add three test cases for bits_iter
include/linux/bpf_mem_alloc.h | 3 +
kernel/bpf/helpers.c | 62 +++++++++++++++----
kernel/bpf/memalloc.c | 14 ++++-
.../selftests/bpf/progs/verifier_bits_iter.c | 61 +++++++++++++++++-
4 files changed, 123 insertions(+), 17 deletions(-)
--
2.29.2
