mirror-linux/tools/testing
Fernando Fernandez Mancera dde1a6084c selftests: nft_queue.sh: add a parallel stress test
Introduce a new stress test to check for race conditions in the
nfnetlink_queue subsystem, where an entry is freed while another CPU is
concurrently walking the global rhashtable.

To trigger this, `nf_queue.c` is extended with two new flags:
  * -O (out-of-order): Buffers packet IDs and flushes them in reverse.
  * -b (bogus verdicts): Floods the kernel with non-existent packet IDs.

The bogus verdict loop forces the kernel's lookup function to perform
full rhashtable bucket traversals (-ENOENT). Combined with reverse-order
flushing and heavy parallel UDP/ping flooding across 8 queues, this puts
the nfnetlink_queue code under pressure.

Joint work with Florian Westphal.

Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
Signed-off-by: Florian Westphal <fw@strlen.de>
2026-04-08 13:34:51 +02:00
..
crypto/chacha20-s390
cxl cxl changes for v7.0 2026-02-12 16:33:05 -08:00
fault-injection
ktest
kunit kunit: tool: copy caller args in run_kernel to prevent mutation 2026-03-02 10:02:06 -07:00
memblock
nvdimm
radix-tree
rbtree
scatterlist
selftests selftests: nft_queue.sh: add a parallel stress test 2026-04-08 13:34:51 +02:00
shared tools: Update context analysis macros in compiler_types.h 2026-01-28 09:25:45 +01:00
vma tools/testing/vma: add VMA userland tests for VMA flag functions 2026-02-12 15:42:59 -08:00
vsock vsock/test: fix send_buf()/recv_buf() EINTR handling 2026-04-06 18:46:03 -07:00