bpf: mark a NULL kfunc argument precisegrafted

check_kfunc_arg() allows bpf_register_is_null() for nullable arguments
w/o marking the underlying scalar register precise. Hence a checkpoint
created on such a path would prune against arbitrary scalar value.

Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)")
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
new file mode 100644
index 000000000..629c10916
--- /dev/null
+++ b/net/ethtool/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-y				+= ioctl.o common.o
+
+obj-$(CONFIG_ETHTOOL_NETLINK)	+= ethtool_nl.o
+
+ethtool_nl-y	:= netlink.o bitset.o strset.o linkinfo.o linkmodes.o rss.o \
+		   linkstate.o debug.o wol.o features.o privflags.o rings.o \
+		   channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \
+		   tunnels.o fec.o eeprom.o stats.o phc_vclocks.o mm.o \
+		   module.o cmis_fw_update.o cmis_cdb.o pse-pd.o plca.o \
+		   phy.o tsconfig.o mse.o