diff options
| -rw-r--r-- | Documentation/features/seccomp/seccomp-filter/arch-support.txt | 2 | ||||
| -rw-r--r-- | arch/m68k/Kconfig | 2 | ||||
| -rw-r--r-- | arch/m68k/include/asm/seccomp.h | 11 | ||||
| -rw-r--r-- | arch/m68k/include/asm/syscall.h | 57 | ||||
| -rw-r--r-- | arch/m68k/include/asm/thread_info.h | 2 | ||||
| -rw-r--r-- | arch/m68k/kernel/entry.S | 3 | ||||
| -rw-r--r-- | arch/m68k/kernel/ptrace.c | 6 |
7 files changed, 81 insertions, 2 deletions
diff --git a/Documentation/features/seccomp/seccomp-filter/arch-support.txt b/Documentation/features/seccomp/seccomp-filter/arch-support.txt index dc71bf7b1a7e..3a7237b989cd 100644 --- a/Documentation/features/seccomp/seccomp-filter/arch-support.txt +++ b/Documentation/features/seccomp/seccomp-filter/arch-support.txt @@ -14,7 +14,7 @@ | hexagon: | TODO | | ia64: | TODO | | loongarch: | ok | - | m68k: | TODO | + | m68k: | ok | | microblaze: | TODO | | mips: | ok | | nios2: | TODO | diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 7bff88118507..82154952e574 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -18,6 +18,8 @@ config M68K select GENERIC_CPU_DEVICES select GENERIC_IOMAP select GENERIC_IRQ_SHOW + select HAVE_ARCH_SECCOMP + select HAVE_ARCH_SECCOMP_FILTER select HAVE_ASM_MODVERSIONS select HAVE_DEBUG_BUGVERBOSE select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_HAS_NO_UNALIGNED diff --git a/arch/m68k/include/asm/seccomp.h b/arch/m68k/include/asm/seccomp.h new file mode 100644 index 000000000000..de8a94e1fb3f --- /dev/null +++ b/arch/m68k/include/asm/seccomp.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _ASM_SECCOMP_H +#define _ASM_SECCOMP_H + +#include <asm-generic/seccomp.h> + +#define SECCOMP_ARCH_NATIVE AUDIT_ARCH_M68K +#define SECCOMP_ARCH_NATIVE_NR NR_syscalls +#define SECCOMP_ARCH_NATIVE_NAME "m68k" + +#endif /* _ASM_SECCOMP_H */ diff --git a/arch/m68k/include/asm/syscall.h b/arch/m68k/include/asm/syscall.h index 465ac039be09..d1453e850cdd 100644 --- a/arch/m68k/include/asm/syscall.h +++ b/arch/m68k/include/asm/syscall.h @@ -4,6 +4,63 @@ #include <uapi/linux/audit.h> +#include <asm/unistd.h> + +extern const unsigned long sys_call_table[]; + +static inline int syscall_get_nr(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->orig_d0; +} + +static inline void syscall_rollback(struct task_struct *task, + struct pt_regs *regs) +{ + regs->d0 = regs->orig_d0; +} + +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) +{ + unsigned long error = regs->d0; + + return IS_ERR_VALUE(error) ? error : 0; +} + +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->d0; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + regs->d0 = (long)error ?: val; +} + +static inline void syscall_get_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned long *args) +{ + args[0] = regs->orig_d0; + args++; + + memcpy(args, ®s->d1, 5 * sizeof(args[0])); +} + +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned long *args) +{ + regs->orig_d0 = args[0]; + args++; + + memcpy(®s->d1, args, 5 * sizeof(args[0])); +} + static inline int syscall_get_arch(struct task_struct *task) { return AUDIT_ARCH_M68K; diff --git a/arch/m68k/include/asm/thread_info.h b/arch/m68k/include/asm/thread_info.h index c952658ba792..31be2ad999ca 100644 --- a/arch/m68k/include/asm/thread_info.h +++ b/arch/m68k/include/asm/thread_info.h @@ -61,6 +61,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ #define TIF_SIGPENDING 6 /* signal pending */ #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ +#define TIF_SECCOMP 13 /* seccomp syscall filtering active */ #define TIF_DELAYED_TRACE 14 /* single step a syscall */ #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ @@ -69,6 +70,7 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) +#define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_DELAYED_TRACE (1 << TIF_DELAYED_TRACE) #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_MEMDIE (1 << TIF_MEMDIE) diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S index 42879e6eb651..4dd2fd7acba9 100644 --- a/arch/m68k/kernel/entry.S +++ b/arch/m68k/kernel/entry.S @@ -214,6 +214,9 @@ ENTRY(system_call) | syscall trace? tstb %a1@(TINFO_FLAGS+2) jmi do_trace_entry + | seccomp filter active? + btst #5,%a1@(TINFO_FLAGS+2) + bnes do_trace_entry cmpl #NR_syscalls,%d0 jcc badsys syscall: diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c index 0a4184a37461..cd0172d29430 100644 --- a/arch/m68k/kernel/ptrace.c +++ b/arch/m68k/kernel/ptrace.c @@ -21,7 +21,7 @@ #include <linux/signal.h> #include <linux/regset.h> #include <linux/elf.h> - +#include <linux/seccomp.h> #include <linux/uaccess.h> #include <asm/page.h> #include <asm/processor.h> @@ -278,6 +278,10 @@ asmlinkage int syscall_trace_enter(void) if (test_thread_flag(TIF_SYSCALL_TRACE)) ret = ptrace_report_syscall_entry(task_pt_regs(current)); + + if (secure_computing() == -1) + return -1; + return ret; } |