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, 55 insertions, 0 deletions

diff --git a/drivers/memstick/host/Kconfig b/drivers/memstick/host/Kconfig
new file mode 100644
index 000000000..fcd2c2cc3
--- /dev/null
+++ b/drivers/memstick/host/Kconfig
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# MemoryStick host controller drivers
+#
+
+comment "MemoryStick Host Controller Drivers"
+
+config MEMSTICK_TIFM_MS
+	tristate "TI Flash Media MemoryStick Interface support "
+	depends on PCI
+	select TIFM_CORE
+	help
+	  Say Y here if you want to be able to access MemoryStick cards with
+	  the Texas Instruments(R) Flash Media card reader, found in many
+	  laptops.
+	  This option 'selects' (turns on, enables) 'TIFM_CORE', but you
+	  probably also need appropriate card reader host adapter, such as
+	  'Misc devices: TI Flash Media PCI74xx/PCI76xx host adapter support
+	  (TIFM_7XX1)'.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called tifm_ms.
+
+config MEMSTICK_JMICRON_38X
+	tristate "JMicron JMB38X MemoryStick interface support"
+	depends on PCI
+
+	help
+	  Say Y here if you want to be able to access MemoryStick cards with
+	  the JMicron(R) JMB38X MemoryStick card reader.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called jmb38x_ms.
+
+config MEMSTICK_R592
+	tristate "Ricoh R5C592 MemoryStick interface support"
+	depends on PCI
+
+	help
+	  Say Y here if you want to be able to access MemoryStick cards with
+	  the Ricoh R5C592 MemoryStick card reader (which is part of 5 in one
+		multifunction reader)
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called r592.
+
+config MEMSTICK_REALTEK_USB
+	tristate "Realtek USB Memstick Card Interface Driver"
+	depends on MISC_RTSX_USB
+	help
+	  Say Y here to include driver code to support Memstick card interface
+	  of Realtek RTS5129/39 series USB card reader
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called rts5139_ms.