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Thu, 27 Mar 2025 22:04:47 +0100 Message-ID: Date: Fri, 28 Mar 2025 07:34:42 +1030 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [btrfs?] kernel BUG in write_all_supers To: dsterba@suse.cz, syzbot Cc: clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <67e5799e.050a0220.2f068f.0032.GAE@google.com> <20250327162525.GU32661@twin.jikos.cz> Content-Language: en-US From: Qu Wenruo Autocrypt: addr=quwenruo.btrfs@gmx.com; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNIlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT7CwJQEEwEIAD4CGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCZxF1YAUJEP5a sQAKCRDCPZHzoSX+qF+mB/9gXu9C3BV0omDZBDWevJHxpWpOwQ8DxZEbk9b9LcrQlWdhFhyn xi+l5lRziV9ZGyYXp7N35a9t7GQJndMCFUWYoEa+1NCuxDs6bslfrCaGEGG/+wd6oIPb85xo naxnQ+SQtYLUFbU77WkUPaaIU8hH2BAfn9ZSDX9lIxheQE8ZYGGmo4wYpnN7/hSXALD7+oun tZljjGNT1o+/B8WVZtw/YZuCuHgZeaFdhcV2jsz7+iGb+LsqzHuznrXqbyUQgQT9kn8ZYFNW 7tf+LNxXuwedzRag4fxtR+5GVvJ41Oh/eygp8VqiMAtnFYaSlb9sjia1Mh+m+OBFeuXjgGlG VvQFzsBNBFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcga CbPEwhLj1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj /IrRUUka68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fN GSsRb+pKEKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0 q1eW4Jrv0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEv ABEBAAHCwHwEGAEIACYCGwwWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCZxF1gQUJEP5a0gAK CRDCPZHzoSX+qHGpB/kB8A7M7KGL5qzat+jBRoLwB0Y3Zax0QWuANVdZM3eJDlKJKJ4HKzjo B2Pcn4JXL2apSan2uJftaMbNQbwotvabLXkE7cPpnppnBq7iovmBw++/d8zQjLQLWInQ5kNq Vmi36kmq8o5c0f97QVjMryHlmSlEZ2Wwc1kURAe4lsRG2dNeAd4CAqmTw0cMIrR6R/Dpt3ma +8oGXJOmwWuDFKNV4G2XLKcghqrtcRf2zAGNogg3KulCykHHripG3kPKsb7fYVcSQtlt5R6v HZStaZBzw4PcDiaAF3pPDBd+0fIKS6BlpeNRSFG94RYrt84Qw77JWDOAZsyNfEIEE0J6LSR/ In-Reply-To: <20250327162525.GU32661@twin.jikos.cz> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:BfyImzBfWpTI0hKdexisgGy9Gggga+AuJxpIOwwCNnxUmHC32KN nXHrSceuP/6uK6EMz2bsO+5HKt5+MhwxI6RomXuEybVglrY9ZFa3KNpNsk8QbpebRr/5PLF 7lPC4Tkoi2cs2/rgEntyWjs/XpCcycNUoQxJQF2xoHiT528N4n+kNSkGDUHQ1l/nAinw1uJ orckCNIX4sg6W2jarp4kA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:op/kzATTi+0=;p+Oy6YnvArC/tnKPC0VVgmp6Y7G 8l+In+vm55/yFxzdX+mDVKls+mdaXKlFDFefbrTB9sCN4p80+GJkIqbs5PP5/CJNDI/jEOa7N NQb49JG7GH9O4J2ps8VMA0u4ochNRsycx1+UyJKuHpntl1j5YJ4/D9TukMnaQTLXzUajaDE7O GuaY4YtXZP10RXPWaIKDiaeZYFvoDDtWOC01ql3sJ8OGiv5xepCSbCw3TlMM53SZeYk4F36dv NIFU0uOgYiX+xELcFQbX3iNUsf4G8qjuL/v322+0wDIYP2rNw42qRVKWesmaWVSlw2nO6Ddx8 H9s71rSM0FLXfANIm+LpOV5Yg5z4+tW4C7fnqOy1PFWsUH/tNsUESk3Lc3hbqhsknbX456LVJ NZ8RyV+DeSK0S8MIrOv1Pf3Q6ybJ3l+HX+0cbY1AgCTIZy2SRwrB0wRNqZVCSF4Ua+HzEWIef SFsUynXTAORfAx5ALhrHyZq0/yUn/PjZojvrtih9lJVllWpixdxvEmlQierb1R5D1NF75Zw6E a/goh8lM2g/LWIAnuCYfoXYAsZkiOyA/iWqPEq9Mx/yNOPvkXLqrI5I0R7QjEPcs8kvbLAEhM dcVGFhahalnAFB20S0w+Ahvi5IAZwHt8hpJ16nBRj7PAFzBHAR6oX0zdthJezPSId+tyftGX9 MY2DeoYPzqwIFI6R8tH2WBnbzWU1lV0W6x3dkArvZfChDeEvn2HwDVaLT+0ZFsiL5R9hsaIBl kdwo/E7u6h2obWMAA9f3lPerxetzdrn1fUwpophCnstnv9X8PsCw9r+glYsdZPbiDAa8DWb9C +m1xv0FqT6mzHKucdzHEQ6GIIQ4t8ny/SJl0y3nQBu/0G00IQSfuktRv0EZT1iFIvuYLqk/Tn 4tTSJcKKYEQJKvdVrkdkOMF3tdhjvtI2KZh8FOaD1Z7ZSK2yjFPkkQHJFOU5SRE3MTMh9xBoy EFTj7AN5lyxFGW448EykJQ/G9iwhfx6KFOAL2XYubDtzrF3jQMUzpsscN4xZQ6iI0MaxmxneN teYFdrhDG0K9xtRVGncZ0gKHeEx8OaMglF2w5Gri31vzXzs0fMDDnv6eBJQXwx6BSqpHHLnZx akiI5RSUKpjEE8M5VU0JRwNsDKoBw71bkbzRlh/WKL9Iju0JlOJWKusaRmYpwEA82FZ2USS6w A9GvGuk//pU6pp2+mFKkuIXNxa7pJ6/asRNkCJlJbu3uhnR3lwBIDgI9al2YZfYhmfvy2muWp 3omSG2vFnSjhF1Jn0Q+s1IHT6SC2w3C/9C6JzVtz32zF2YC8JwU2xnK+GEP7oWE3uNSf2uikj fVNyhPKDLBwNIfGkNNry5l8vM+VEizkAFMWIGKJRYUuirbFWL+8Vhc6OPLiMNMAGElouBUE+K wMtySAImnHqdUeQADu++kAkk7ga5lBzT1U5QI6f0x96RoegKfoQrKjWWP3HhHiYF53PV8bioU lFWkTBkOylTP265brMl6juObBKg8= =E5=9C=A8 2025/3/28 02:55, David Sterba =E5=86=99=E9=81=93: > On Thu, Mar 27, 2025 at 09:15:26AM -0700, syzbot wrote: >> Hello, >> >> syzbot found the following issue on: >> >> HEAD commit: f6e0150b2003 Merge tag 'mtd/for-6.15' of git://git.kern= el... >> git tree: upstream >> console output: https://syzkaller.appspot.com/x/log.txt?x=3D1405d804580= 000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=3D46a07195688= b794b >> dashboard link: https://syzkaller.appspot.com/bug?extid=3D34122898a11ab= 689518a >> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for D= ebian) 2.40 >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D10d7abb05= 80000 >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=3D15d76198580= 000 >> >> Downloadable assets: >> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets= /7feb34a89c2a/non_bootable_disk-f6e0150b.raw.xz >> vmlinux: https://storage.googleapis.com/syzbot-assets/7ade4c34c9b1/vmli= nux-f6e0150b.xz >> kernel image: https://storage.googleapis.com/syzbot-assets/1fe37b97ec9d= /bzImage-f6e0150b.xz >> mounted in repro: https://storage.googleapis.com/syzbot-assets/1f4c759f= e772/mount_0.gz >> fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=3D1= 757abb0580000) >> >> IMPORTANT: if you fix the issue, please add the following tag to the co= mmit: >> Reported-by: syzbot+34122898a11ab689518a@syzkaller.appspotmail.com >> >> BTRFS info (device loop0): using sha256 (sha256-avx2) checksum algorith= m >> BTRFS info (device loop0): using free-space-tree >> assertion failed: folio_order(folio) =3D=3D 0, in fs/btrfs/disk-io.c:38= 58 > > This is > > ASSERT(folio_order(folio) =3D=3D 0); > > and the folio is from device->bdev->bd_mapping. > And the bdev folios are out of our control, so it's possible the bdev mapping is utilizing larger folios. I'll give it a check on the involved function and if everything else supports large folios, just remove that ASSERT() line. Thanks, Qu