From 2b97956af60810cd382b86b9ce9aea421b889861 Mon Sep 17 00:00:00 2001 From: Nuoqi Gui Date: Fri, 4 Sep 2026 12:41:55 +0200 Subject: selftests/bpf: Test rhtab kptr cancellation semantics Resizable hash-map updates and deletions must not perform full special-field destruction in their caller context. In particular, a referenced kptr must remain attached to the allocation until the memory allocator destructor can release it safely. Add separate coverage for both affected paths. The update test stores a task kptr, replaces the ordinary value bytes with BPF_EXIST, and verifies that the kptr survived. The delete test removes an element and exchanges its kptr through the still-valid map-value pointer before the allocation is reclaimed. Both cases observe a NULL kptr when rhtab uses bpf_obj_free_fields(). They recover and release the reference after rhtab switches to cancellation semantics. Signed-off-by: Nuoqi Gui [ kkd: Split update and delete coverage and rewrote the commit log ] Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904104203.345917-5-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/net/netdevsim/Makefile | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 drivers/net/netdevsim/Makefile (limited to 'drivers/net/netdevsim/Makefile') diff --git a/drivers/net/netdevsim/Makefile b/drivers/net/netdevsim/Makefile new file mode 100644 index 000000000..87718204f --- /dev/null +++ b/drivers/net/netdevsim/Makefile @@ -0,0 +1,27 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_NETDEVSIM) += netdevsim.o + +netdevsim-objs := \ + netdev.o dev.o ethtool.o fib.o bus.o health.o hwstats.o udp_tunnels.o tc.o + +ifeq ($(CONFIG_BPF_SYSCALL),y) +netdevsim-objs += \ + bpf.o +endif + +ifneq ($(CONFIG_XFRM_OFFLOAD),) +netdevsim-objs += ipsec.o +endif + +ifneq ($(CONFIG_PSAMPLE),) +netdevsim-objs += psample.o +endif + +ifneq ($(CONFIG_INET_PSP),) +netdevsim-objs += psp.o +endif + +ifneq ($(CONFIG_MACSEC),) +netdevsim-objs += macsec.o +endif -- cgit v1.3.1