Hi Jarkko, On 4/3/2022 4:50 PM, Jarkko Sakkinen wrote: > I get this when trying to get EAUG-EACCEPTCOPY to run on Enarx and I get: > There seems a difference in the error codes described: > Unexpected PF: address: 0x007f7fff910000, error code 0x15 Error code 0x15 translates to binary 10101 which is: BIT 0: Present BIT 2: User BIT 4: Instruction fetch > > 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. PROT|WRITE|USER|RSVD is bits 0,1,2,3 which is 0xF Did you obtain 0x15 or 0xF as error code? If EAUG/EACCEPTCOPY was followed by an attempt to execute that page then 0x15 error could be explained since the page would only support RW permissions at that time. > 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 Reinette
