linux-kernel - RE: [PATCH v2] arm/stacktrace: stop unwinding after an invalid address.

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Message-ID: <1166142499.594566.1522760284362.JavaMail.jboss@ep1ml501>
Date:   Tue, 03 Apr 2018 18:28:04 +0530
From:   Vaneet Narang <v.narang@...sung.com>
To:     Maninder Singh <maninder1.s@...sung.com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "dustinb@...eaurora.org" <dustinb@...eaurora.org>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        AMIT SAHRAWAT <a.sahrawat@...sung.com>,
        PANKAJ MISHRA <pankaj.m@...sung.com>
Subject: RE: [PATCH v2] arm/stacktrace: stop unwinding after an invalid
 address.

 
Hi Russell,


>__dabt_usr+0x44/0x60
>0xb6748ea4
>^^^^^^^^

>--- a/arch/arm/kernel/stacktrace.c
>+++ b/arch/arm/kernel/stacktrace.c
>@@ -92,6 +92,9 @@ static int save_trace(struct stackframe *frame, void *d)
> 
> 	regs = (struct pt_regs *)frame->sp;
>
>+	if (!__kernel_text_address(regs->ARM_pc))
>+		return 1;
>+
> 	trace->entries[trace->nr_entries++] = regs->ARM_pc;
 
 
Any Inputs or Comments on this patch to avoid storing user space entries 
during unwind.
 
Regards,
Vaneet Narang
Download attachment "rcptInfo.txt" of type "application/octet-stream" (1636 bytes)