From 78004e9a87f240df03e2f73120d291763c32e0a7 Mon Sep 17 00:00:00 2001 From: Ali Ahmet Memis Date: Fri, 21 Aug 2026 01:45:27 +0000 Subject: openrisc: fix arbitrary kernel memory access via or1k_atomic syscall sys_or1k_atomic() (syscall 244 in the "or1k" ABI) takes two user pointers, v1 and v2, and swaps the words they point to in hand-written assembly. l.lwz r29,0(r4) l.lwz r27,0(r5) l.sw 0(r4),r27 l.sw 0(r5),r29 The pointers are not checked with access_ok(). The four memory accesses also have no exception table entries. A caller passes a kernel address as either pointer, and the syscall reads from and writes to it directly. This gives an unprivileged process a kernel read/write primitive. It overwrites kernel data such as the sys_call_table, gaining code execution in kernel context. Check both pointers before entering the critical section. Add fixups for the four memory accesses so faults on valid but unmapped user addresses return -EFAULT. [shorne@gmail.com: fix comment style] Fixes: 9d02a4283e9c ("OpenRISC: Boot code") Cc: stable@vger.kernel.org Signed-off-by: Ali Ahmet Memis Signed-off-by: Stafford Horne --- drivers/crypto/starfive/Kconfig | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 drivers/crypto/starfive/Kconfig (limited to 'drivers/crypto/starfive/Kconfig') diff --git a/drivers/crypto/starfive/Kconfig b/drivers/crypto/starfive/Kconfig new file mode 100644 index 000000000..11518ca3e --- /dev/null +++ b/drivers/crypto/starfive/Kconfig @@ -0,0 +1,26 @@ +# +# StarFive crypto drivers configuration +# + +config CRYPTO_DEV_JH7110 + tristate "StarFive JH7110 cryptographic engine driver" + depends on (SOC_STARFIVE && AMBA_PL08X) || COMPILE_TEST + depends on HAS_DMA + select CRYPTO_ENGINE + select CRYPTO_HMAC + select CRYPTO_SHA256 + select CRYPTO_SHA512 + select CRYPTO_SM3 + select CRYPTO_RSA + select CRYPTO_AES + select CRYPTO_CCM + select CRYPTO_GCM + select CRYPTO_ECB + select CRYPTO_CBC + select CRYPTO_CTR + help + Support for StarFive JH7110 crypto hardware acceleration engine. + This module provides acceleration for public key algo, + skciphers, AEAD and hash functions. + + If you choose 'M' here, this module will be called jh7110-crypto. -- cgit v1.3.1