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Fri, 31 May 2024 00:04:57 +0200 Message-ID: <76911b13-e26b-44d0-bace-ff4c13e96b5b@gmx.com> Date: Fri, 31 May 2024 07:34:49 +0930 Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: BUG: kernel NULL pointer dereference, address: 000000000000002c - RIP: 0010:alloc_extent_buffer To: Naresh Kamboju , open list , Linux btrfs , lkft-triage@lists.linaro.org, Linux Regressions Cc: Arnd Bergmann , Chris Mason , David Sterba , Josef Bacik References: 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+qAUCY00iVQUJDToH pgAKCRDCPZHzoSX+qNKACACkjDLzCvcFuDlgqCiS4ajHAo6twGra3uGgY2klo3S4JespWifr BLPPak74oOShqNZ8yWzB1Bkz1u93Ifx3c3H0r2vLWrImoP5eQdymVqMWmDAq+sV1Koyt8gXQ XPD2jQCrfR9nUuV1F3Z4Lgo+6I5LjuXBVEayFdz/VYK63+YLEAlSowCF72Lkz06TmaI0XMyj jgRNGM2MRgfxbprCcsgUypaDfmhY2nrhIzPUICURfp9t/65+/PLlV4nYs+DtSwPyNjkPX72+ LdyIdY+BqS8cZbPG5spCyJIlZonADojLDYQq4QnufARU51zyVjzTXMg5gAttDZwTH+8LbNI4 mm2YzsBNBFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcga CbPEwhLj1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj /IrRUUka68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fN GSsRb+pKEKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0 q1eW4Jrv0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEv ABEBAAHCwHwEGAEIACYCGwwWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCY00ibgUJDToHvwAK CRDCPZHzoSX+qK6vB/9yyZlsS+ijtsvwYDjGA2WhVhN07Xa5SBBvGCAycyGGzSMkOJcOtUUf tD+ADyrLbLuVSfRN1ke738UojphwkSFj4t9scG5A+U8GgOZtrlYOsY2+cG3R5vjoXUgXMP37 INfWh0KbJodf0G48xouesn08cbfUdlphSMXujCA8y5TcNyRuNv2q5Nizl8sKhUZzh4BascoK DChBuznBsucCTAGrwPgG4/ul6HnWE8DipMKvkV9ob1xJS2W4WJRPp6QdVrBWJ9cCdtpR6GbL iQi22uZXoSPv/0oUrGU+U5X4IvdnvT+8viPzszL5wXswJZfqfy8tmHM85yjObVdIG6AlnrrD In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:1tZQ7V1MYLYvcZuA1GUDuuKMAj1kTGsVoMQ4oZki6llKE/W2ypw zhj7jIOG2oKV2kMHrQ9JKp8Qzpz+RpEIpNXZTDoohxJCi70r4P23rWJYf5j7RN6joFubevi EtvzSZZBrBMKN79kpcdAVSLKC3Xw3BuVv81tpWJu73we6vEaQzDYuqx2gBcEdBXbGAxb5r6 vFPYFNPTE+OV5u0TS/Oew== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:W15UJ07y8Tk=;EKsBkmUWtVwMBDei7ahi21x+4uP lCAhybJVGf5Q0iG6PZhOdfNqWNerDjXJybh6Lx8hc4ZV2kFgyIi5SapPHQxRAUNmyHEL9C3lV li/RX7zNO9G7lQohckrrMBDrV+GmhEDSy3uSSK7oN/CdjQiSCmHep2wi9OKFPoZIxWCWwxedJ gTAMGqVbZd3mLSctnsLDB6pCf81Wi3JNHZkXilBTgGV+EL+ICOoui/UmCTRl/St3yDr+KLsoH 4pn9riluzfP8V8hBaDeqfU3azn17cvqlZtgSobmZozQ7tSq8d8bwvN48f257Yntc9HDs4YkxG XS+RNQq9QFF4HyG2mCktFt3x9iw2tp4+W13hqrq6jzOPHv4T2orH86ICyAILkEyX/JRHFsYML kDp0xMk6g1OfOJjV85Dp8czx0/oI+V87yBy1isQV8vV9kFI52VOHL5WYBLQLMSnymVxUpiCot WiIepYqTl4m7+UQHASwsY6Y1Ob07tgFJX6Viihz030G+T5XjBeHr7jEGmVpJpWqvv710a+bbn Y0z/HQVu3btAW6bmV0BN/W7XyIExvVU0aq/KhzbkAEjb60KsDtRe+0AOa7Au/AVSKsvsBa6TX 5jEDgbUvLcm400gFah5IgiTUi6JMn0tss8Cg17WPITUHghyjML0GYLJlowMzug/LTWjQddGJf lAw9otF3OkqwByGFKshBFlAhYgF2l0do/TgfLGNQF+ZnR/PoUoKziCS9cnDAmjxPKlGyzp9sJ WNHTpZMWJLOKRo3ZmZFlkKK2nL0GgFZE4eLC/dw3NV9YV14lH4E4wodMBJcXdeG5KvraxE025 PGUfcqJ730/Vxlu6rAn0LEnSSpCpZyM/sZTcuYriX2Iy4= =E5=9C=A8 2024/5/30 23:26, Naresh Kamboju =E5=86=99=E9=81=93: > The following kernel BUG: and kernel crash noticed while running xfstest= s btfs > filesystem testing on qemu-x86_64 with loop back. > > Steps to reproduce link provided. > > Test details: > ---- > Tests: xfstests-btrfs btrfs/232 > SKIP_INSTALL=3D'true' > TEST_DEV=3D'/dev/loop0' > SCRATCH_DEV=3D'/dev/loop1' > TEST_DIR=3D'/mnt/test' > SCRATCH_DIR=3D'/mnt/scratch' > FILESYSTEM=3D'btrfs' > T_SIZE=3D'5G' > S_SIZE=3D'8G' That's a pretty common setup, and unable to reproduce it here. > > Reported-by: Linux Kernel Functional Testing > > Test log: > ------- > <12>[ 6457.571628] run fstests btrfs/232 at 2024-05-29 16:31:29 > > <6>[ 6464.685165] BTRFS: device fsid > 50147eec-0761-4d75-8e77-df9c50ac385e devid 1 transid 6 /dev/loop1 > (7:1) scanned by mount (152729) > <6>[ 6464.715051] BTRFS info (device loop1): first mount of filesystem > 50147eec-0761-4d75-8e77-df9c50ac385e > <6>[ 6464.719266] BTRFS info (device loop1): using crc32c > (crc32c-generic) checksum algorithm > <6>[ 6464.724996] BTRFS info (device loop1): using free-space-tree > <6>[ 6464.789867] BTRFS info (device loop1): checking UUID tree > <6>[ 6499.694309] BTRFS info (device loop1): qgroup scan completed > (inconsistency flag cleared) > <6>[ 6499.766172] BTRFS info (device loop1): qgroup scan completed > (inconsistency flag cleared) > <1>[ 6572.421678] BUG: kernel NULL pointer dereference, address: > 000000000000002c > <1>[ 6572.423036] #PF: supervisor read access in kernel mode > <1>[ 6572.423070] #PF: error_code(0x0000) - not-present page > <6>[ 6572.423143] PGD 0 P4D 0 > <4>[ 6572.424555] Oops: Oops: 0000 [#1] PREEMPT SMP PTI > <4>[ 6572.424814] CPU: 0 PID: 152772 Comm: fsstress Not tainted > 6.10.0-rc1-next-20240529 #1 > <4>[ 6572.424946] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), > BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 > <4>[ 6572.425062] RIP: 0010:alloc_extent_buffer+0x253/0x820 Any line number and code context for it? It may be a clue for the recent bug of various bad page status. Thanks, Qu > -- > Linaro LKFT > https://lkft.linaro.org >