ftrace: Synchronize the initialization of ftrace_opsgrafted

There's some internal state that ftrace_ops needs to have set, but since
it can be declared outside of the ftrace.c code, it calls
ftrace_ops_init() on the ops in every global function. The issue is that
if two tasks call it on the same ops at the same time it is possible to
have the initialization of one corrupt the initialization of the other
call.

Create a ops_mutex to use to synchronize every initialization of the
ftrace_ops. The mutex is taken within checking the ftrace_ops flag that
states it was initializied but the flag is checked again after the mutex
has been taken. Checking first outside the mutex allows it to shortcut
having to take the mutex. But then the check needs to be done again after
the mute is taken in case of races.

Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home
Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock")
Reported-by: sashiko-bot@kernel.org
Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/drivers/crypto/marvell/Kconfig b/drivers/crypto/marvell/Kconfig
new file mode 100644
index 000000000..aa269abb0
--- /dev/null
+++ b/drivers/crypto/marvell/Kconfig
@@ -0,0 +1,55 @@
+#
+# Marvell crypto drivers configuration
+#
+
+config CRYPTO_DEV_MARVELL
+	tristate
+
+config CRYPTO_DEV_MARVELL_CESA
+	tristate "Marvell's Cryptographic Engine driver"
+	depends on PLAT_ORION || ARCH_MVEBU || COMPILE_TEST
+	select CRYPTO_LIB_AES
+	select CRYPTO_LIB_DES
+	select CRYPTO_SKCIPHER
+	select CRYPTO_HASH
+	select SRAM
+	select CRYPTO_DEV_MARVELL
+	help
+	  This driver allows you to utilize the Cryptographic Engines and
+	  Security Accelerator (CESA) which can be found on MVEBU and ORION
+	  platforms.
+	  This driver supports CPU offload through DMA transfers.
+
+config CRYPTO_DEV_OCTEONTX_CPT
+	tristate "Support for Marvell OcteonTX CPT driver"
+	depends on ARCH_THUNDER || COMPILE_TEST
+	depends on PCI_MSI && 64BIT
+	select CRYPTO_LIB_AES
+	select CRYPTO_SKCIPHER
+	select CRYPTO_HASH
+	select CRYPTO_AEAD
+	select CRYPTO_AUTHENC
+	select CRYPTO_DEV_MARVELL
+	help
+		This driver allows you to utilize the Marvell Cryptographic
+		Accelerator Unit(CPT) found in OcteonTX series of processors.
+
+		To compile this driver as module, choose M here:
+		the modules will be called octeontx-cpt and octeontx-cptvf
+
+config CRYPTO_DEV_OCTEONTX2_CPT
+	tristate "Marvell OcteonTX2 CPT driver"
+	depends on ARCH_THUNDER2 || COMPILE_TEST
+	depends on PCI_MSI && 64BIT
+	depends on NET_VENDOR_MARVELL
+	select OCTEONTX2_MBOX
+	select CRYPTO_DEV_MARVELL
+	select CRYPTO_LIB_AES
+	select CRYPTO_SKCIPHER
+	select CRYPTO_HASH
+	select CRYPTO_AEAD
+	select CRYPTO_AUTHENC
+	select NET_DEVLINK
+	help
+		This driver allows you to utilize the Marvell Cryptographic
+		Accelerator Unit(CPT) found in OcteonTX2 series of processors.