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 --- .../features/debug/KASAN/arch-support.txt | 30 ++++++++++++++++++++++ .../debug/debug-vm-pgtable/arch-support.txt | 30 ++++++++++++++++++++++ .../debug/gcov-profile-all/arch-support.txt | 30 ++++++++++++++++++++++ Documentation/features/debug/kcov/arch-support.txt | 30 ++++++++++++++++++++++ Documentation/features/debug/kgdb/arch-support.txt | 30 ++++++++++++++++++++++ .../features/debug/kmemleak/arch-support.txt | 30 ++++++++++++++++++++++ .../debug/kprobes-on-ftrace/arch-support.txt | 30 ++++++++++++++++++++++ .../features/debug/kprobes/arch-support.txt | 30 ++++++++++++++++++++++ .../features/debug/kretprobes/arch-support.txt | 30 ++++++++++++++++++++++ .../features/debug/optprobes/arch-support.txt | 30 ++++++++++++++++++++++ .../features/debug/stackprotector/arch-support.txt | 30 ++++++++++++++++++++++ .../features/debug/uprobes/arch-support.txt | 30 ++++++++++++++++++++++ .../debug/user-ret-profiler/arch-support.txt | 30 ++++++++++++++++++++++ 13 files changed, 390 insertions(+) create mode 100644 Documentation/features/debug/KASAN/arch-support.txt create mode 100644 Documentation/features/debug/debug-vm-pgtable/arch-support.txt create mode 100644 Documentation/features/debug/gcov-profile-all/arch-support.txt create mode 100644 Documentation/features/debug/kcov/arch-support.txt create mode 100644 Documentation/features/debug/kgdb/arch-support.txt create mode 100644 Documentation/features/debug/kmemleak/arch-support.txt create mode 100644 Documentation/features/debug/kprobes-on-ftrace/arch-support.txt create mode 100644 Documentation/features/debug/kprobes/arch-support.txt create mode 100644 Documentation/features/debug/kretprobes/arch-support.txt create mode 100644 Documentation/features/debug/optprobes/arch-support.txt create mode 100644 Documentation/features/debug/stackprotector/arch-support.txt create mode 100644 Documentation/features/debug/uprobes/arch-support.txt create mode 100644 Documentation/features/debug/user-ret-profiler/arch-support.txt (limited to 'Documentation/features/debug') diff --git a/Documentation/features/debug/KASAN/arch-support.txt b/Documentation/features/debug/KASAN/arch-support.txt new file mode 100644 index 000000000..39c6e78c0 --- /dev/null +++ b/Documentation/features/debug/KASAN/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: KASAN +# Kconfig: HAVE_ARCH_KASAN +# description: arch supports the KASAN runtime memory checker +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | TODO | + | arm: | ok | + | arm64: | ok | + | csky: | TODO | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | TODO | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | TODO | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | TODO | + | sparc: | TODO | + | um: | ok | + | x86: | ok | + | xtensa: | ok | + ----------------------- diff --git a/Documentation/features/debug/debug-vm-pgtable/arch-support.txt b/Documentation/features/debug/debug-vm-pgtable/arch-support.txt new file mode 100644 index 000000000..156687a74 --- /dev/null +++ b/Documentation/features/debug/debug-vm-pgtable/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: debug-vm-pgtable +# Kconfig: ARCH_HAS_DEBUG_VM_PGTABLE +# description: arch supports pgtable tests for semantics compliance +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | ok | + | arm: | TODO | + | arm64: | ok | + | csky: | TODO | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | TODO | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | ok | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | TODO | + | sparc: | TODO | + | um: | TODO | + | x86: | ok | + | xtensa: | ok | + ----------------------- diff --git a/Documentation/features/debug/gcov-profile-all/arch-support.txt b/Documentation/features/debug/gcov-profile-all/arch-support.txt new file mode 100644 index 000000000..63494bddc --- /dev/null +++ b/Documentation/features/debug/gcov-profile-all/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: gcov-profile-all +# Kconfig: ARCH_HAS_GCOV_PROFILE_ALL +# description: arch supports whole-kernel GCOV code coverage profiling +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | TODO | + | arm: | ok | + | arm64: | ok | + | csky: | ok | + | hexagon: | TODO | + | loongarch: | TODO | + | m68k: | TODO | + | microblaze: | ok | + | mips: | ok | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | TODO | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | ok | + | sparc: | TODO | + | um: | ok | + | x86: | ok | + | xtensa: | ok | + ----------------------- diff --git a/Documentation/features/debug/kcov/arch-support.txt b/Documentation/features/debug/kcov/arch-support.txt new file mode 100644 index 000000000..4449e1f55 --- /dev/null +++ b/Documentation/features/debug/kcov/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: kcov +# Kconfig: ARCH_HAS_KCOV +# description: arch supports kcov for coverage-guided fuzzing +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | TODO | + | arm: | ok | + | arm64: | ok | + | csky: | TODO | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | ok | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | TODO | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | TODO | + | sparc: | TODO | + | um: | ok | + | x86: | ok | + | xtensa: | ok | + ----------------------- diff --git a/Documentation/features/debug/kgdb/arch-support.txt b/Documentation/features/debug/kgdb/arch-support.txt new file mode 100644 index 000000000..f287f16ce --- /dev/null +++ b/Documentation/features/debug/kgdb/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: kgdb +# Kconfig: HAVE_ARCH_KGDB +# description: arch supports the kGDB kernel debugger +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | ok | + | arm: | ok | + | arm64: | ok | + | csky: | TODO | + | hexagon: | ok | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | ok | + | mips: | ok | + | nios2: | ok | + | openrisc: | TODO | + | parisc: | ok | + | powerpc: | ok | + | riscv: | ok | + | s390: | TODO | + | sh: | ok | + | sparc: | ok | + | um: | TODO | + | x86: | ok | + | xtensa: | TODO | + ----------------------- diff --git a/Documentation/features/debug/kmemleak/arch-support.txt b/Documentation/features/debug/kmemleak/arch-support.txt new file mode 100644 index 000000000..f45149cfa --- /dev/null +++ b/Documentation/features/debug/kmemleak/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: kmemleak +# Kconfig: HAVE_DEBUG_KMEMLEAK +# description: arch supports the kernel memory leak detector +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | ok | + | arm: | ok | + | arm64: | ok | + | csky: | ok | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | ok | + | mips: | ok | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | TODO | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | ok | + | sparc: | ok | + | um: | ok | + | x86: | ok | + | xtensa: | ok | + ----------------------- diff --git a/Documentation/features/debug/kprobes-on-ftrace/arch-support.txt b/Documentation/features/debug/kprobes-on-ftrace/arch-support.txt new file mode 100644 index 000000000..d937b7a03 --- /dev/null +++ b/Documentation/features/debug/kprobes-on-ftrace/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: kprobes-on-ftrace +# Kconfig: HAVE_KPROBES_ON_FTRACE +# description: arch supports combined kprobes and ftrace live patching +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | TODO | + | arm: | TODO | + | arm64: | TODO | + | csky: | ok | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | TODO | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | ok | + | powerpc: | ok | + | riscv: | TODO | + | s390: | ok | + | sh: | TODO | + | sparc: | TODO | + | um: | TODO | + | x86: | ok | + | xtensa: | TODO | + ----------------------- diff --git a/Documentation/features/debug/kprobes/arch-support.txt b/Documentation/features/debug/kprobes/arch-support.txt new file mode 100644 index 000000000..1ea27aedd --- /dev/null +++ b/Documentation/features/debug/kprobes/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: kprobes +# Kconfig: HAVE_KPROBES +# description: arch supports live patched kernel probe +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | ok | + | arm: | ok | + | arm64: | ok | + | csky: | ok | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | ok | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | ok | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | ok | + | sparc: | ok | + | um: | TODO | + | x86: | ok | + | xtensa: | TODO | + ----------------------- diff --git a/Documentation/features/debug/kretprobes/arch-support.txt b/Documentation/features/debug/kretprobes/arch-support.txt new file mode 100644 index 000000000..022be42e6 --- /dev/null +++ b/Documentation/features/debug/kretprobes/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: kretprobes +# Kconfig: HAVE_KRETPROBES +# description: arch supports kernel function-return probes +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | ok | + | arm: | ok | + | arm64: | ok | + | csky: | ok | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | ok | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | ok | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | ok | + | sparc: | ok | + | um: | TODO | + | x86: | ok | + | xtensa: | TODO | + ----------------------- diff --git a/Documentation/features/debug/optprobes/arch-support.txt b/Documentation/features/debug/optprobes/arch-support.txt new file mode 100644 index 000000000..92f5d0f44 --- /dev/null +++ b/Documentation/features/debug/optprobes/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: optprobes +# Kconfig: HAVE_OPTPROBES +# description: arch supports live patched optprobes +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | TODO | + | arm: | ok | + | arm64: | TODO | + | csky: | TODO | + | hexagon: | TODO | + | loongarch: | TODO | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | TODO | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | TODO | + | powerpc: | ok | + | riscv: | TODO | + | s390: | TODO | + | sh: | TODO | + | sparc: | TODO | + | um: | TODO | + | x86: | ok | + | xtensa: | TODO | + ----------------------- diff --git a/Documentation/features/debug/stackprotector/arch-support.txt b/Documentation/features/debug/stackprotector/arch-support.txt new file mode 100644 index 000000000..43e49c716 --- /dev/null +++ b/Documentation/features/debug/stackprotector/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: stackprotector +# Kconfig: HAVE_STACKPROTECTOR +# description: arch supports compiler driven stack overflow protection +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | TODO | + | arm: | ok | + | arm64: | ok | + | csky: | ok | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | ok | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | TODO | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | ok | + | sparc: | TODO | + | um: | TODO | + | x86: | ok | + | xtensa: | ok | + ----------------------- diff --git a/Documentation/features/debug/uprobes/arch-support.txt b/Documentation/features/debug/uprobes/arch-support.txt new file mode 100644 index 000000000..0c698003c --- /dev/null +++ b/Documentation/features/debug/uprobes/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: uprobes +# Kconfig: ARCH_SUPPORTS_UPROBES +# description: arch supports live patched user probes +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | TODO | + | arm: | ok | + | arm64: | ok | + | csky: | ok | + | hexagon: | TODO | + | loongarch: | ok | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | ok | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | TODO | + | powerpc: | ok | + | riscv: | ok | + | s390: | ok | + | sh: | TODO | + | sparc: | ok | + | um: | TODO | + | x86: | ok | + | xtensa: | TODO | + ----------------------- diff --git a/Documentation/features/debug/user-ret-profiler/arch-support.txt b/Documentation/features/debug/user-ret-profiler/arch-support.txt new file mode 100644 index 000000000..3e4317675 --- /dev/null +++ b/Documentation/features/debug/user-ret-profiler/arch-support.txt @@ -0,0 +1,30 @@ +# +# Feature name: user-ret-profiler +# Kconfig: HAVE_USER_RETURN_NOTIFIER +# description: arch supports user-space return from system call profiler +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | TODO | + | arc: | TODO | + | arm: | TODO | + | arm64: | TODO | + | csky: | TODO | + | hexagon: | TODO | + | loongarch: | TODO | + | m68k: | TODO | + | microblaze: | TODO | + | mips: | TODO | + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | TODO | + | powerpc: | TODO | + | riscv: | TODO | + | s390: | TODO | + | sh: | TODO | + | sparc: | TODO | + | um: | TODO | + | x86: | ok | + | xtensa: | TODO | + ----------------------- -- cgit v1.3.1