Date: Fri, 07 Apr 2023 17:31:41 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 270632] [ext2fs] files <4096 bytes are corrupted on ext4 filesystems Message-ID: <bug-270632-3630-S1QHzgWDwe@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-270632-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-270632-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D270632 --- Comment #2 from Fedor Uporov <fsu@FreeBSD.org> --- Hi, Rajeev. Thanks a lot for bug report and detailed reproducer. The problem is, that I did not managed to reproduce the issue locally. I've tried VMWare and qemu VMs, but failed in both cases (see below). Could you please provide the dmesg description of your USB thumb drive. Also, it would be great if you will be able to reproduce it on main kernel = and check the same reproducer on ufs. =3D=3D=3D VMWare player FreeBSD guest: root@fb:~ # mdconfig -s 1G md0 root@fb:~ # mkfs.ext4 /dev/md0 mke2fs 1.47.0 (5-Feb-2023) Creating filesystem with 262144 4k blocks and 65536 inodes Filesystem UUID: 6431b66c-ddaa-466c-abbe-add74f0465d4 Superblock backups stored on blocks: 32768, 98304, 163840, 229376 Allocating group tables: done Writing inode tables: done Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done root@fb:~ # mount -t ext2fs /dev/md0 /mnt root@fb:~ # echo 'hello world' >/mnt/a.txt root@fb:~ # ed -s /mnt/a.txt <<\EoF > 1s/./&/ > wq > EoF root@fb:~ # cat /mnt/a.txt hello world root@fb:~ # umount /mnt root@fb:~ # mount -r -t ext2fs /dev/da0p1 /mnt mount: /dev/da0p1: Invalid fstype: Invalid argument root@fb:~ # mount -r -t ext2fs /dev/md0 /mnt root@fb:~ # hexdump -C /mnt/a.txt 00000000 68 65 6c 6c 6f 20 77 6f 72 6c 64 0a |hello world.| 0000000c root@fb:~ # cat /mnt/a.txt hello world =3D=3D=3D Flash drive, connected to VMWare player FreeBSD guest: ugen1.2: <Samsung Flash Drive FIT> at usbus1 umass0 on uhub1 umass0: <Samsung Flash Drive FIT, class 0/0, rev 3.10/11.00, addr 2> on usb= us1 umass0: SCSI over Bulk-Only; quirks =3D 0x4000 umass0:3:0: Attached to scbus3 da1 at umass-sim0 bus 0 scbus3 target 0 lun 0 da1: <Samsung Flash Drive FIT 1100> Removable Direct Access SPC-4 SCSI devi= ce da1: Serial Number 0321821010021934 da1: 40.000MB/s transfers da1: 122376MB (250626566 512 byte sectors) da1: quirks=3D0x2<NO_6_BYTE> root@fb:~ # ls /dev | grep da da0 da0s1 da0s1a da0s1b da1 da1p1 da1p2 root@fb:~ # mount -t ext2fs /dev/da1p1 /mnt root@fb:~ # echo 'hello world' >/mnt/a.txt root@fb:~ # ed -s /mnt/a.txt <<\EoF > 1s/./&/ > wq > EoF root@fb:~ # cat /mnt/a.txt hello world root@fb:~ # umount /mnt root@fb:~ # mount -r -t ext2fs /dev/da1p1 /mnt root@fb:~ # hexdump -C /mnt/a.txt 00000000 68 65 6c 6c 6f 20 77 6f 72 6c 64 0a |hello world.| 0000000c root@fb:~ # umount /mnt =3D=3D=3D qemu emulated usb drive: root@fb:~ # mke2fs -L thumbdrive -t ext4 /dev/da0 mke2fs 1.47.0 (5-Feb-2023) Creating filesystem with 1048576 4k blocks and 262144 inodes Filesystem UUID: 203eaac3-f303-42e7-976c-6e12138e2b1f Superblock backups stored on blocks:=20 32768, 98304, 163840, 229376, 294912, 819200, 884736 Allocating group tables: done=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20 Writing inode tables: done=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20 Creating journal (16384 blocks): done Writing superblocks and filesystem accounting information: done=20 root@fb:~ # mount -t ext2fs /dev/da0p1 /mnt mount: /dev/da0p1: Invalid fstype: Invalid argument root@fb:~ # mount -t ext2fs /dev/da0 /mnt root@fb:~ # echo 'hello world' >/mnt/a.txt root@fb:~ # ed -s /mnt/a.txt <<\EoF > 1s/./&/ > wq > EoF root@fb:~ # cat /mnt/a.txt hello world root@fb:~ # umount /mnt root@fb:~ # mount -r -t ext2fs /dev/da0 /mnt root@fb:~ # hexdump -C /mnt/a.txt 00000000 68 65 6c 6c 6f 20 77 6f 72 6c 64 0a |hello world.| 0000000c For all cases: root@fb:~ # uname -a FreeBSD fb 14.0-CURRENT FreeBSD 14.0-CURRENT #0 main-n261872-1fb7d2cf999e: = Thu Mar 30 10:18:47 UTC 2023=20=20=20=20 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 --=20 You are receiving this mail because: You are the assignee for the bug.=
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