Messages in this thread | | | Date | Mon, 1 Sep 2014 12:47:51 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH v6 2/6] arm64: ptrace: allow tracer to skip a system call |
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On Wed, Aug 27, 2014 at 02:55:46PM +0900, AKASHI Takahiro wrote: > 1) > setting x0 to -ENOSYS is necessary because, otherwise, user-issued syscall(-1) will > return a bogus value when audit tracing is on. > > Please note that, on arm, > not traced traced > ------ ------ > syscall(-1) aborted OOPs(BUG_ON) > syscall(-3000) aborted aborted > syscall(1000) ENOSYS ENOSYS
Two points here:
1. You've found a case which causes a BUG_ON(). Where is the bug report for this, so the problem can be investigated and resolved?
2. What do you mean by "aborted" ?
Please, if you find a problem with 32-bit ARM, report it. Don't hide it, because hiding it can be a security issue or in the case of BUG_ON(), it could be a denial of service issue.
As you're part of Linaro, I would have thought you'd be more responsible in this regard - after all, Linaro is supposed to be about improving the ARM kernel... Maybe I got that wrong, and Linaro is actually about ensuring that the ARM kernel is stuffed full of broken features?
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