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Mon, 13 Oct 2025 08:02:27 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id Gq0FIhOy7GjQEwAAD6G6ig (envelope-from ); Mon, 13 Oct 2025 08:02:27 +0000 Date: Mon, 13 Oct 2025 10:02:25 +0200 From: Oscar Salvador To: Alexei Starovoitov Cc: Andrew Morton , syzbot , Johannes Weiner , Brendan Jackman , LKML , linux-mm , Michal Hocko , Network Development , Suren Baghdasaryan , syzkaller-bugs , Vlastimil Babka , ziy@nvidia.com, bpf Subject: Re: [syzbot] [mm?] WARNING: locking bug in __set_page_owner (2) Message-ID: References: <68e7e6ad.a70a0220.126b66.0043.GAE@google.com> <20251009165241.4d78dc5d9fa5525d988806b5@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Action: no action X-Rspam-User: X-Rspamd-Queue-Id: 918CEC0009 X-Rspamd-Server: rspam02 X-Stat-Signature: dz9se8dwc8nh8e6d5t3o4a8zs4fj9ymt X-HE-Tag: 1760342552-430766 X-HE-Meta: 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 UjXLbEmC 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 fV2MuypW xdZNVK3Etpq2s6jXDOA4iDm6XCOqBEQW5r9c7xHG7u4uBmAcWpFE0wZ2WgwYHVi8 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, 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 Thu, Oct 09, 2025 at 05:26:21PM -0700, Alexei Starovoitov wrote: > On Thu, Oct 9, 2025 at 4:52 PM Andrew Morton wrote: > > > > On Thu, 09 Oct 2025 09:45:33 -0700 syzbot wrote: > > > > > Hello, > > > > > > syzbot found the following issue on: > > > > > > HEAD commit: 2c95a756e0cf net: pse-pd: tps23881: Fix current measuremen.. > > > git tree: net > > > console output: https://syzkaller.appspot.com/x/log.txt?x=16e1852f980000 > > > kernel config: https://syzkaller.appspot.com/x/.config?x=5bcbbf19237350b5 > > > dashboard link: https://syzkaller.appspot.com/bug?extid=8259e1d0e3ae8ed0c490 > > > compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 > > > > > > Unfortunately, I don't have any reproducer for this issue yet. > > > > > > Downloadable assets: > > > disk image: https://storage.googleapis.com/syzbot-assets/8272657e4298/disk-2c95a756.raw.xz > > > vmlinux: https://storage.googleapis.com/syzbot-assets/4e53ba690f28/vmlinux-2c95a756.xz > > > kernel image: https://storage.googleapis.com/syzbot-assets/6112d620d6fc/bzImage-2c95a756.xz > > > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > > Reported-by: syzbot+8259e1d0e3ae8ed0c490@syzkaller.appspotmail.com > > > > At 2c95a756e0cf, page_owner.c hasn't been modified in a couple of years. > > > > How can add_stack_record_to_list()'s spin_lock_irqsave() be "invalid > > wait context"? In NMI, yes, but the trace doesn't indicate that we're > > in an NMI. > > > > Confused. I'm suspecting BPF involvement. Cc'ed for help, please. > > The attached patch should fix it. > There are different options, but this one is the simplest. Seems quite trivial to backport, so: Reviewed-by: Oscar Salvador -- Oscar Salvador SUSE Labs