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Message-ID: <4e7d0354-0d5c-3f7b-a316-f34171fcbfa9@iogearbox.net> Date: Wed, 23 Jan 2019 02:55:40 +0100 From: Daniel Borkmann <daniel@...earbox.net> To: David Miller <davem@...emloft.net>, jannh@...gle.com Cc: alexei.starovoitov@...il.com, ast@...nel.org, jakub.kicinski@...ronome.com, netdev@...r.kernel.org, gregkh@...uxfoundation.org Subject: Re: stable backport for the BPF speculation series? On 01/22/2019 05:44 PM, David Miller wrote: > From: Jann Horn <jannh@...gle.com> > Date: Tue, 22 Jan 2019 15:36:54 +0100 > >> On Thu, Jan 3, 2019 at 1:08 AM Alexei Starovoitov >> <alexei.starovoitov@...il.com> wrote: >>> On Thu, Jan 03, 2019 at 12:58:26AM +0100, Daniel Borkmann wrote: >>>> This set fixes an out of bounds case under speculative execution >>>> by implementing masking of pointer alu into the verifier. For >>>> details please see the individual patches. >>>> >>>> Thanks! >>>> >>>> v2 -> v3: >>>> - 8/9: change states_equal condition into old->speculative && >>>> !cur->speculative, thanks Jakub! >>>> - 8/9: remove incorrect speculative state test in >>>> propagate_liveness(), thanks Jakub! >>>> v1 -> v2: >>>> - Typo fixes in commit msg and a comment, thanks David! >>> >>> Applied, Thanks >> >> This series and the followup fix ("bpf: fix sanitation of alu op with >> pointer / scalar type from different paths") have been in Linus' tree >> for six days, but from what I can tell, they aren't queued up for >> stable yet. >> >> @davem: Are you going to send this through stable, or is this only >> going to be in 5.0? > > The BPF developers handle their -stable submissions. Will get this to stable towards end of week. We wanted to let this sit for a while in Linus' tree given the complexity of the fix to get some more coverage. We also need 9d5564ddcf2a ("bpf: fix inner map masking to prevent oob under speculation") in addition. Thanks, Daniel
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