Hi, This is regarding the squashfs mount failure that I am getting on my device during boot time. I just wanted to know if someone else has come across this issue, or this issue is already fixed, or this is altogether a different issue? Here are more details: Kernel: 4.14.170 ; Qualcomm chipset (arm32 bit) Platform: busybox Storage: NAND 512MB Filesystem: ubifs + squashfs ubi0 : with 5 volumes (rootfs, usrfs, others) Kernel command line: ro rootwait console=ttyMSM0,115200,n8 rootfstype=squashfs root=/dev/mtdblock34 ubi.mtd=30,0,30 .... Background: We are using ubifs filesystem with squashfs for rootfs (as ready only). First we tried to flash "usrfs" (data) volume (ubi0_1) and it worked fine (with device booting successfully). Next we are trying to flash "rootfs" volume (ubi0_0) now. The volume flashing is successful but after that when we reboot the system we are getting below errors. Logs: [....] [ 4.589340] vreg_conn_pa: dis▒[ 4.602779] squashfs: SQUASHFS error: unable to read xattr id index table [...] [ 4.964083] No filesystem could mount root, tried: [ 4.964087] squashfs [ 4.966255] [ 4.973443] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,34) ----------- [ 4.246861] ubi0: attaching mtd30 [ 4.453241] ubi0: scanning is finished [ 4.460655] ubi0: attached mtd30 (name "system", size 216 MiB) [ 4.460704] ubi0: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes [ 4.465562] ubi0: min./max. I/O unit sizes: 4096/4096, sub-page size 4096 [ 4.472483] ubi0: VID header offset: 4096 (aligned 4096), data offset: 8192 [ 4.479295] ubi0: good PEBs: 864, bad PEBs: 0, corrupted PEBs: 0 [ 4.486067] ubi0: user volume: 5, internal volumes: 1, max. volumes count: 128 [ 4.492311] ubi0: max/mean erase counter: 4/0, WL threshold: 4096, image sequence number: 1 [ 4.499333] ubi0: available PEBs: 0, total reserved PEBs: 864, PEBs reserved for bad PEB handling: 60 So, we just wanted to know if this issue is related to squashfs or if there is some issue with our volume flashing. Note: We are using fastboot mechanism to support UBI volume flashing. Observation: Recently I have seen some squashfs changes related to similar issues (xattr) so I wanted to understand if these changes are relevant to our issue or not ? Age Commit message(Expand) Author 2021-03-30 squashfs: fix xattr id and id lookup sanity checks Phillip Lougher 2021-03-30 squashfs: fix inode lookup sanity checks Sean Nyekjaer 2021-02-23 squashfs: add more sanity checks in xattr id lookup Phillip Lougher 2021-02-23 squashfs: add more sanity checks in inode lookup Phillip Lougher 2021-02-23 squashfs: add more sanity checks in id lookup Phillip Lougher Please let us know your opinion about this issue... It will help us to decide whether the issue is related to squashfs or not. Thanks, Pintu
