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b=Oj5zpxoGgdzmeIog+7KO1QLrI4HUFkQNtnMsz/Sf/iwRjmXaISNO5VFNexwDOfA7I QLiRzOMZyLuAs0cGPMstdgayiiW91bVrnPRgVfDxA9f45B1BQKQ9Sgcl3vWBYynlem 9eFhgaA4Z7w3AHx2qx192F+EVD8bM8OD2lg7BcxAX3RJCu4AEjGD+/ajUMxe/+F0lU vAUsbFr/Gr22WvlIBVGbtqHob5Fevhl6bJtrxBAtC9YFcaDUeubtmBEl3k1SWaU16P wOPAnsesfWb+rpki9Z4AUpY3luNT5svEsOgbs3aNHBuDM0iTMVRSnTo5Z6/YR5f3Xg YheZMVbSKLEoQ== Date: Mon, 12 Oct 2026 20:40:22 -0700 From: Kees Cook To: "Vlastimil Babka (SUSE)" Cc: Andrew Morton , Harry Yoo , Christian Brauner , Jan Kara , Roman Gushchin , Johannes Weiner , Michal Hocko , Shakeel Butt , Muchun Song , cgroups@vger.kernel.org, linux-mm@kvack.org, Pedro Falcato , Kuniyuki Iwashima , linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net-next v6 2/8] ipc, msg: Account msg_msg allocations with GFP_KERNEL_ACCOUNT again Message-ID: <202610122032.A63BB70@keescook> References: <20261006092030.got.500-kees@kernel.org> <20261006092035.166776-2-kees@kernel.org> <202610092010.934197B@keescook> <20261010153714.b9e91801ea93675da099e903@linux-foundation.org> <4866a382-42d9-44da-b68b-377d36642528@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4866a382-42d9-44da-b68b-377d36642528@kernel.org> X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: DFCCB1C0004 X-Rspam-User: X-Stat-Signature: gks8h6xfkkaurggdrkfmgabuuuk67t7q X-HE-Tag: 1791862823-408812 X-HE-Meta: U2FsdGVkX1+NSZxA9FRFNeAQRx4HhJSIXR6PFIzJUgwranNNRYUWDtNHtuVqCGvbfk5R4lTzUHwbiwE9gX/3lbVQtiNIOsAnUSFqyvzqs0eWPSsY0AjY2IryGDs/DCADhXOC1Z6lkOVf3K63bDUErtchNMC9HenxoJ95qvEraBmL91EDW6SO4WTYC93BLM/cDbRZB0XEQl7f92aonEd3T95y/0y0AIblCZPA9xLqKt97iUhVEaf3Yle2O3LyxKdrWdvmQxm9bFuHFovqndIjenkqUWPlKTMsfpvcBTuNxRJQ8wIjW92/MdvBCjn2CuKyiNsijNlgfuX29YXm56Z1t51IL+NDPIZFWo8BR5mEz/0thfd00DrnFWUSUt9tSWdmRV/xSHLjaBAzO0XCRPe8TCYp2/C6AGfVZPNPZztFvxLEK/L8IKc3PEu7VjT/rdPMpBkrm6rDyuHjgnpAK8lGWcaUP8x8vYFuD7fqj7hf25neuUTL0of37cWcPTBA5aaQV7cGFLXSsn7H6iLgoYJ7WqY7PTfm27bmrDH5gMgBKPHJ6t2Edp1tZUMnco2IQFujnpKrguGDVvMhWFSOaA/xrKtU/WLaMcb6ieTtvNdtJ9EZwoU43wkMBk5h0cQRw7lNzNm/df+A+V+ftRJNCC0Svuvj5pWY2sPonSV6hRY2HNS882zQet1DzLANTRb6laKmBW53IoVJjjzW8KSLQbVXzq+tDFdXbl0YZesIcpvmMo0yNC4wAhdLLigQLkwTYGmdvZQ74S405fryiO6atY9sN+6uki113oCAjMORGd1ZFg5KtTeQq1IJCiPxlnPUHJ8Rf96pLdy2nflYTgo30Vy7qi20H99I7wCMK87l6gmFSluYu0TprDbKQj2K1iktQAaCaTEYhtJlEUfec0kiD5fkSUAN7OXjgqBsB5cT8irBHLjC9c4PYIdFCRLEqJgtcFAvvOgw995Bf0mSAQQAdVj rHrxvT8b XD1wCOHIc2BQTTuZ9MbEhOuBEEvMhS1ez5rFXckX0LkAQyGJLBDM5OatoHB6JPMgEooNcjJ3BMscKdgl40Q+yOX53hmfL1j2+J1b53u0bAn/XsCEyf1aLPf14Mdw15dbhkVIF9n6KwBahPQlLT7FovA3Vpn6ngfvvYgVmG2aAHbe1EmND+q1sKD7C61KSJl38L1lgKFsKbIixcL0igdpkkv/niwWifEFdBbzmIzIjF/0e+I5kZdFCf1lVw5bKrvYoxt+TbIfsweLS9NfC/AWmHOAPLUbAQ3ZcOOHVyVTR+LcfPAJccuaOlVg1LUkdQrIeJ8CmoNYhg9M17fUGTN28suCkPkxnBCFx48+naiJok1k9PkLbKx/Kizan3zDv9SCnJeoWrq8w6FzOMFI8979c6Z72dQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Oct 12, 2026 at 06:46:48PM +0200, Vlastimil Babka (SUSE) wrote: > On 10/11/26 00:37, Andrew Morton wrote: > > On Fri, 9 Oct 2026 20:14:20 -0700 Kees Cook wrote: > > > >> Anything with Fixes: will end up in stable, so I just leave off the > >> stable CC these days. > > > > -stable maintainers have been asked to Not Do That for mm patches. > > Other subsystems are doing the same. > > > > I don't know how they determine whether something is an mm patch. A > > patch which covers do-do-that and dont-do-that parts of the tree is > > likely to be mishandled. > > > > So yeah, add that cc:stable to reduce the possibility of mistakes. > > There's also this from the list of pain points at > https://lwn.net/Articles/1099594/ > > Kroah-Hartman: subsystems that do not add CC: stable@vger.kernel.org > tags to patches, but which still expect the stable team to pick up the > important fixes anyway. The stable maintainers are overwhelmed as it is and > are not doing that. tl;dr: yup, sorry. I will add CC:stable in the future. I went to go figure out where I had gotten this misunderstanding. netdev dropped their special handling in 2021 in commit dbbe7c962c3a ("docs: networking: drop special stable handling"). But I really thought I had Greg tell me (in person somewhere?) that "Cc: stable" was redundant, and I think what I misread in current docs was, "... such tagging is unnecessary if the stable team can derive the appropriate versions from Fixes: tags." in https://docs.kernel.org/process/stable-kernel-rules.html#stable-kernel-rules but that, on closer reading, is about the _versioning_ syntax of the "Cc: stable" trailer. -- Kees Cook