Messages in this thread | | | Subject | Re: [PATCH 2/2] arm64: Fix watchpoint recursion when single-step is wrongly triggered in irq | From | "Wangnan (F)" <> | Date | Mon, 21 Mar 2016 18:38:31 +0800 |
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On 2016/3/21 18:24, Pratyush Anand wrote: > On 21/03/2016:08:37:50 AM, He Kuang wrote: >> On arm64, watchpoint handler enables single-step to bypass the next >> instruction for not recursive enter. If an irq is triggered right >> after the watchpoint, a single-step will be wrongly triggered in irq >> handler, which causes the watchpoint address not stepped over and >> system hang. > Does patch [1] resolves this issue as well? I hope it should. Patch[1] has still > not been sent for review. Your test result will be helpful. > > ~Pratyush > > [1] https://github.com/pratyushanand/linux/commit/7623c8099ac22eaa00e7e0f52430f7a4bd154652
Could you please provide a test program for your case so we can test it on our devices? I guess setting breakpoint on a "copy_from_user()" accessing an invalid address can trigger this problem?
Thank you.
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