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Commit cfcd1705 authored by David Woodhouse's avatar David Woodhouse Committed by Paul Mackerras
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[POWERPC] Mask 32-bit system call arguments to 32 bits on PPC64 in audit code 



The system call entry code will clear the high bits of argument
registers before invoking the system call; don't report whatever noise
happens to be in the high bits of the register before that happens.

Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 0e47e3cc

arch/powerpc/kernel/ptrace.c

+15 −9
Original line number Original line Diff line number Diff line
@@ -532,16 +532,22 @@ void do_syscall_trace_enter(struct pt_regs *regs) 
	    && (current->ptrace & PT_PTRACED))

	    && (current->ptrace & PT_PTRACED))

		do_syscall_trace();

		do_syscall_trace();





	if (unlikely(current->audit_context))

	if (unlikely(current->audit_context)) {

		audit_syscall_entry(

#ifdef CONFIG_PPC64

#ifdef CONFIG_PPC32

		if (!test_thread_flag(TIF_32BIT))

				    AUDIT_ARCH_PPC,

			audit_syscall_entry(AUDIT_ARCH_PPC64,

#else

				    test_thread_flag(TIF_32BIT)?AUDIT_ARCH_PPC:AUDIT_ARCH_PPC64,

#endif

					    regs->gpr[0],

					    regs->gpr[0],

					    regs->gpr[3], regs->gpr[4],

					    regs->gpr[3], regs->gpr[4],

					    regs->gpr[5], regs->gpr[6]);

					    regs->gpr[5], regs->gpr[6]);

		else

#endif

			audit_syscall_entry(AUDIT_ARCH_PPC,

					    regs->gpr[0],

					    regs->gpr[3] & 0xffffffff,

					    regs->gpr[4] & 0xffffffff,

					    regs->gpr[5] & 0xffffffff,

					    regs->gpr[6] & 0xffffffff);

	}

}

}





void do_syscall_trace_leave(struct pt_regs *regs)

void do_syscall_trace_leave(struct pt_regs *regs)