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b=H8fv3xtDT7tjw5iv3k/GNuPafrfnFiiOAqetDtbjGxVhpFHySLhIR8+Bf1Xpo3KFX 22Usof6ZP7wLrZx+h4OcXK4sWw93jX+EixGG9zzXiUmmBJ/HwjYgefshaG38HcFgjm RfsUaD8sC5Jch6+TKj84bojgo2iOA7C8RPDvEdnY2BjZvs1w0wZt6l3Uw5YFpVEccP JZwhV8ym1Kuscx2J+5NaTxd/xf5/mGKbtzOsvx02hMmoVht148UtFeuc3pt5wj3ubF oT/LC49IKNvKTfdmCRDVqmdVLefzHW8g80ktCT38wjGT3FHPkLQhQoHf+RaNSUdvXD D6A+dETil113Q== Date: Wed, 30 Sep 2026 10:07:46 +0100 From: "Lorenzo Stoakes (ARM)" To: Nikola Ciprich Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, david@kernel.org, Mike Rapoport , Dave Hansen , Pedro Falcato , Kiryl Shutsemau , luizcap@redhat.com Subject: Re: hunting memory corruption bug in 6.18.x Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: dc5sn3jzfa9g5ua5a4tmr6gqx1eh4soy X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: DEBC040005 X-HE-Tag: 1790759272-935610 X-HE-Meta: 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 vln8nLQu Z55i40/qvlzPb/Y5+dJI0333jFbsGGqHkoTYlWB5FXkI1DlFGjkRj2170KJoKH8jpsc/EHIRAt61sQSlG7R/8XTQoU+VSqVmlZRdrT1LudTGOB+mdZaVikC4UiCVWwBeGSxatIdGkdJRvPc0pbhU/sUnIUvzPa9E1ssG6/aljDKkhcWXBRRDcoV/MvsuT5V1171olh2QK62b5SO11k7y2VyJwD1tQ+IrT2YErh14TTnndYoRCB3LlERCmdpM+ohDwTNnwznsrgaiJMwxyGJwCmOqiYQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Sep 29, 2026 at 09:11:53PM +0200, Nikola Ciprich wrote: > so he reverted back to 6.18.15 > > then he got crash of another node (to which he was migrating VMs from the first updated node), that one > was still running 6.18.15 > > pretty unfortunate planned work outcome :-/ > > but it confirms that both 6.18.15 and unfortunately also 6.18.54 are affected Yeah 6.18.15 is expected, I'd not say reverting is really worthwhile honestly, given what you've observed previously. Maybe worth checking if commit 26505e1b5b54 ("KVM: SVM: make svm_flush_tlb_gva do a full asid flush if NPT enabled") helps in that case? -- Cheers, Lorenzo