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Fri, 07 Feb 2025 02:43:21 -0800 (PST) MIME-Version: 1.0 References: <2f681f48-00f5-4e09-8431-2b3dbfaa881e@heusel.eu> <03eb13ad-03a2-4982-9545-0a5506e043d0@suse.cz> In-Reply-To: <03eb13ad-03a2-4982-9545-0a5506e043d0@suse.cz> From: Miklos Szeredi Date: Fri, 7 Feb 2025 11:43:11 +0100 X-Gm-Features: AWEUYZlIBtfn2RHJWB88UL-DRtlyctc8WdFktH0eXJTCByl5CkmXjOsWS504hvk Message-ID: Subject: Re: [REGRESSION][BISECTED] Crash with Bad page state for FUSE/Flatpak related applications since v6.13 To: Vlastimil Babka Cc: Matthew Wilcox , Christian Heusel , Josef Bacik , Miklos Szeredi , regressions@lists.linux.dev, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Joanne Koong , linux-mm Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 6BD7540007 X-Stat-Signature: t8xpkyqmwcd6yjcsebfw5j5k854md5rw X-HE-Tag: 1738925002-938859 X-HE-Meta: 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 MIXZOHnI CbHUzOHXb5dJ6diAukVWgezy3l+/i1BwUNIepkbQYdEH0fTTAVyNE7VIZUX+4TdS0oJVd+2mAHjXoAICfhwWRKWA+E1L3/3UMY42WS0is6HjPWrSgZYfKs2TiMP20OVama4YVpyBTi4blwTGgEbcboM9i2P9Y+tjwCEL5nYmWyuxvqfGjqRZh6hkpPakaY2ePCKLr X-Bogosity: Ham, tests=bogofilter, spamicity=0.000029, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, 7 Feb 2025 at 11:25, Vlastimil Babka wrote: > Could be a use-after free of the page, which sets PG_lru again. The list > corruptions in __rmqueue_pcplist also suggest some page manipulation after > free. The -1 refcount suggests somebody was using the page while it was > freed due to refcount dropping to 0 and then did a put_page()? Can you suggest any debug options that could help pinpoint the offender? Thanks, Miklos