diff options
Diffstat (limited to 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/ptrace.h | 12 | ||||
| -rw-r--r-- | arch/arm64/include/asm/stacktrace.h | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/syscall.h | 19 |
3 files changed, 22 insertions, 11 deletions
diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index e58bca832dff..41b332c054ab 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -320,7 +320,17 @@ static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) static inline unsigned long regs_return_value(struct pt_regs *regs) { - return regs->regs[0]; + unsigned long val = regs->regs[0]; + + /* + * Audit currently uses regs_return_value() instead of + * syscall_get_return_value(). Apply the same sign-extension here until + * audit is updated to use syscall_get_return_value(). + */ + if (compat_user_mode(regs)) + val = sign_extend64(val, 31); + + return val; } static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc) diff --git a/arch/arm64/include/asm/stacktrace.h b/arch/arm64/include/asm/stacktrace.h index 1801399204d7..8aebc00c1718 100644 --- a/arch/arm64/include/asm/stacktrace.h +++ b/arch/arm64/include/asm/stacktrace.h @@ -35,7 +35,7 @@ struct stack_info { * accounting information necessary for robust unwinding. * * @fp: The fp value in the frame record (or the real fp) - * @pc: The fp value in the frame record (or the real lr) + * @pc: The lr value in the frame record (or the real lr) * * @stacks_done: Stacks which have been entirely unwound, for which it is no * longer valid to unwind to. diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index cfc0672013f6..03e20895453a 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -29,22 +29,23 @@ static inline void syscall_rollback(struct task_struct *task, regs->regs[0] = regs->orig_x0; } - -static inline long syscall_get_error(struct task_struct *task, - struct pt_regs *regs) +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) { - unsigned long error = regs->regs[0]; + unsigned long val = regs->regs[0]; if (is_compat_thread(task_thread_info(task))) - error = sign_extend64(error, 31); + val = sign_extend64(val, 31); - return IS_ERR_VALUE(error) ? error : 0; + return val; } -static inline long syscall_get_return_value(struct task_struct *task, - struct pt_regs *regs) +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) { - return regs->regs[0]; + unsigned long error = syscall_get_return_value(task, regs); + + return IS_ERR_VALUE(error) ? error : 0; } static inline void syscall_set_return_value(struct task_struct *task, |