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[2403:580d:fda1::299]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-215478976e3sm17340845ad.58.2024.11.29.20.28.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 29 Nov 2024 20:28:04 -0800 (PST) Message-ID: <15a3a0ec-78fa-4992-a98f-6b82b5a387a5@suse.com> Date: Sat, 30 Nov 2024 14:57:59 +1030 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [btrfs?] kernel BUG in __folio_start_writeback To: syzbot , akpm@linux-foundation.org, clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, willy@infradead.org References: <674a6f87.050a0220.253251.00d5.GAE@google.com> Content-Language: en-US From: Qu Wenruo Autocrypt: addr=wqu@suse.com; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNGFF1IFdlbnJ1byA8d3F1QHN1c2UuY29tPsLAlAQTAQgAPgIbAwULCQgHAgYVCAkKCwIE FgIDAQIeAQIXgBYhBC3fcuWlpVuonapC4cI9kfOhJf6oBQJnEXVgBQkQ/lqxAAoJEMI9kfOh Jf6o+jIH/2KhFmyOw4XWAYbnnijuYqb/obGae8HhcJO2KIGcxbsinK+KQFTSZnkFxnbsQ+VY fvtWBHGt8WfHcNmfjdejmy9si2jyy8smQV2jiB60a8iqQXGmsrkuR+AM2V360oEbMF3gVvim 2VSX2IiW9KERuhifjseNV1HLk0SHw5NnXiWh1THTqtvFFY+CwnLN2GqiMaSLF6gATW05/sEd V17MdI1z4+WSk7D57FlLjp50F3ow2WJtXwG8yG8d6S40dytZpH9iFuk12Sbg7lrtQxPPOIEU rpmZLfCNJJoZj603613w/M8EiZw6MohzikTWcFc55RLYJPBWQ+9puZtx1DopW2jOwE0EWdWB rwEIAKpT62HgSzL9zwGe+WIUCMB+nOEjXAfvoUPUwk+YCEDcOdfkkM5FyBoJs8TCEuPXGXBO Cl5P5B8OYYnkHkGWutAVlUTV8KESOIm/KJIA7jJA+Ss9VhMjtePfgWexw+P8itFRSRrrwyUf E+0WcAevblUi45LjWWZgpg3A80tHP0iToOZ5MbdYk7YFBE29cDSleskfV80ZKxFv6koQocq0 vXzTfHvXNDELAuH7Ms/WJcdUzmPyBf3Oq6mKBBH8J6XZc9LjjNZwNbyvsHSrV5bgmu/THX2n g/3be+iqf6OggCiy3I1NSMJ5KtR0q2H2Nx2Vqb1fYPOID8McMV9Ll6rh8S8AEQEAAcLAfAQY AQgAJgIbDBYhBC3fcuWlpVuonapC4cI9kfOhJf6oBQJnEXWBBQkQ/lrSAAoJEMI9kfOhJf6o cakH+QHwDszsoYvmrNq36MFGgvAHRjdlrHRBa4A1V1kzd4kOUokongcrOOgHY9yfglcvZqlJ qfa4l+1oxs1BvCi29psteQTtw+memmcGruKi+YHD7793zNCMtAtYidDmQ2pWaLfqSaryjlzR /3tBWMyvIeWZKURnZbBzWRREB7iWxEbZ014B3gICqZPDRwwitHpH8Om3eZr7ygZck6bBa4MU o1XgbZcspyCGqu1xF/bMAY2iCDcq6ULKQceuKkbeQ8qxvt9hVxJC2W3lHq8dlK1pkHPDg9wO JoAXek8MF37R8gpLoGWl41FIUb3hFiu3zhDDvslYM4BmzI18QgQTQnotJH8= In-Reply-To: <674a6f87.050a0220.253251.00d5.GAE@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Stat-Signature: zwgixju16ryf5z5fpbwuwna88f5pnntg X-Rspamd-Queue-Id: 36A841C0007 X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1732940877-183863 X-HE-Meta: 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 C0h+Sji+ 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.002102, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 在 2024/11/30 12:21, syzbot 写道: > Hello, > > syzbot has tested the proposed patch but the reproducer is still triggering an issue: > BUG: MAX_LOCKDEP_KEYS too low! > > BUG: MAX_LOCKDEP_KEYS too low! Hi Syzbot guys, Syzbot is great, but I'm wondering if it's possible to disable lockdep for this particular test? Or just let it re-run the test again? If the test doesn't crash with my fix, but only lockdep warnings on certain too low values, I'd call it fixed. BTW, I'm not seeing where I can changed the MAX_LCKDEP_KEYS values in the kernel... Thanks, Qu > turning off the locking correctness validator. > CPU: 1 UID: 0 PID: 11728 Comm: kworker/u8:10 Not tainted 6.12.0-rc7-syzkaller-00133-g17a4e91a431b #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 > Workqueue: btrfs-cache btrfs_work_helper > Call Trace: > > __dump_stack lib/dump_stack.c:94 [inline] > dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 > register_lock_class+0x827/0x980 kernel/locking/lockdep.c:1328 > __lock_acquire+0xf3/0x2100 kernel/locking/lockdep.c:5077 > lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 > process_one_work kernel/workqueue.c:3204 [inline] > process_scheduled_works+0x950/0x1850 kernel/workqueue.c:3310 > worker_thread+0x870/0xd30 kernel/workqueue.c:3391 > kthread+0x2f0/0x390 kernel/kthread.c:389 > ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 > > > > Tested on: > > commit: 17a4e91a btrfs: test if we need to wait the writeback .. > git tree: https://github.com/adam900710/linux.git writeback_fix > console output: https://syzkaller.appspot.com/x/log.txt?x=12c5ad30580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=fa4954ad2c62b915 > dashboard link: https://syzkaller.appspot.com/bug?extid=aac7bff85be224de5156 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > Note: no patches were applied.