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From: Jarkko Sakkinen <jarkko@kernel.org>
To: linux-sgx@vger.kernel.org
Cc: dave.hansen@linux.intel.com, reinette.chatre@intel.com
Subject: Odd looking #PF fault code
Date: Mon, 4 Apr 2022 02:50:21 +0300	[thread overview]
Message-ID: <YkoyvdqIqkaOk8NL@kernel.org> (raw)

I get this when trying to get EAUG-EACCEPTCOPY to run on Enarx and I get:

Unexpected PF: address: 0x007f7fff910000, error code 0x15

I'm using patches from:

https://github.com/rchatre/linux/tree/sgx/sgx2_submitted_v2_plus_rwx

Fault code is in other words PROT|WRITE|USER|RSVD.

According to arch/x86/kernel/fault.c:

	/*
	 * Reserved bits are never expected to be set on
	 * entries in the user portion of the page tables.
	 */
	if (unlikely(error_code & X86_PF_RSVD))
		pgtable_bad(regs, error_code, address);

Any clue how this fault code could emit?

[*] https://github.com/enarx/enarx/pull/1608

BR, Jarkko

             reply	other threads:[~2022-04-03 23:49 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-03 23:50 Jarkko Sakkinen [this message]
2022-04-04 16:27 ` Odd looking #PF fault code Reinette Chatre
2022-04-05  5:59   ` Jarkko Sakkinen
2022-04-04 21:32 ` Jarkko Sakkinen

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