[Bug 1906476] Re: PANIC at zfs_znode.c:335:zfs_znode_sa_init() // VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED, &zp->z_sa_hdl)) failed

[Andrew Paglusch]

@Colin Would the package in your PPA be a better source of information
for trying to reproduce this bug?

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Title:
  PANIC at zfs_znode.c:335:zfs_znode_sa_init() // VERIFY(0 ==
  sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED,
  &zp->z_sa_hdl)) failed

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[Bug 1906476] Re: PANIC at zfs_znode.c:335:zfs_znode_sa_init() // VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED, &zp->z_sa_hdl)) failed

[Andrew Paglusch]

I just upgraded to the latest ZoL release and am still having the same
problem. I also upgrade my pool (after creating a checkpoint).

$ modinfo zfs | head -12
filename:   /lib/modules/5.4.0-66-generic/updates/dkms/zfs.ko
version:2.0.3-0york0~20.04
license:CDDL
author: OpenZFS
description:ZFS
alias:  devname:zfs
alias:  char-major-10-249
srcversion: DCE77834FDF1B30075B1328
depends:spl,znvpair,icp,zlua,zzstd,zunicode,zcommon,zavl
retpoline:  Y
name:   zfs
vermagic:   5.4.0-66-generic SMP mod_unload

$ dpkg -l | grep zfs
ii  libzfs2linux 2.0.3-0york0~20.04
amd64OpenZFS filesystem library for Linux
ii  zfs-dkms 2.0.3-0york0~20.04all  
OpenZFS filesystem kernel modules for Linux
ii  zfs-zed  0.8.3-1ubuntu12.6 
amd64OpenZFS Event Daemon
ii  zfsutils-linux   2.0.3-0york0~20.04
amd64command-line tools to manage OpenZFS filesystems

$ zfs --version
zfs-2.0.3-0york0~20.04
zfs-kmod-0.8.3-1ubuntu12.6


Panic:
```
Mar  7 20:29:28 home-nas kernel: [  181.778239] VERIFY(0 == 
sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED, &zp->z_sa_hdl)) 
failed
Mar  7 20:29:28 home-nas kernel: [  181.778605] PANIC at 
zfs_znode.c:339:zfs_znode_sa_init()
Mar  7 20:29:28 home-nas kernel: [  181.778778] Showing stack for process 2854
Mar  7 20:29:28 home-nas kernel: [  181.778793] CPU: 0 PID: 2854 Comm: ls 
Tainted: P   OE 5.4.0-66-generic #74-Ubuntu
Mar  7 20:29:28 home-nas kernel: [  181.778796] Hardware name: QEMU Standard PC 
(i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 
04/01/2014
Mar  7 20:29:28 home-nas kernel: [  181.778798] Call Trace:
Mar  7 20:29:28 home-nas kernel: [  181.778948]  dump_stack+0x6d/0x9a
Mar  7 20:29:28 home-nas kernel: [  181.779068]  spl_dumpstack+0x29/0x2b [spl]
Mar  7 20:29:28 home-nas kernel: [  181.779081]  spl_panic+0xd4/0xfc [spl]
Mar  7 20:29:28 home-nas kernel: [  181.779491]  ? __zfs_dbgmsg+0xe0/0x110 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.779624]  ? 
sa_cache_constructor+0x27/0x50 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.779643]  ? _cond_resched+0x19/0x30
Mar  7 20:29:28 home-nas kernel: [  181.779657]  ? mutex_lock+0x13/0x40
Mar  7 20:29:28 home-nas kernel: [  181.779760]  ? 
dmu_buf_replace_user+0x60/0x80 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.779863]  ? 
dmu_buf_set_user_ie+0x1a/0x20 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.78]  
zfs_znode_sa_init.isra.0+0xdf/0xf0 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780138]  zfs_znode_alloc+0x102/0x6d0 
[zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780249]  ? aggsum_add+0x196/0x1b0 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780343]  ? 
dmu_buf_unlock_parent+0x38/0x80 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780429]  ? 
dbuf_read_impl.constprop.0+0x614/0x700 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780442]  ? 
spl_kmem_cache_alloc+0xc1/0x7d0 [spl]
Mar  7 20:29:28 home-nas kernel: [  181.780447]  ? _cond_resched+0x19/0x30
Mar  7 20:29:28 home-nas kernel: [  181.780452]  ? mutex_lock+0x13/0x40
Mar  7 20:29:28 home-nas kernel: [  181.780537]  ? aggsum_add+0x196/0x1b0 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780541]  ? _cond_resched+0x19/0x30
Mar  7 20:29:28 home-nas kernel: [  181.780546]  ? _cond_resched+0x19/0x30
Mar  7 20:29:28 home-nas kernel: [  181.780551]  ? down_read+0x13/0xa0
Mar  7 20:29:28 home-nas kernel: [  181.780638]  ? dbuf_read+0x1d0/0x520 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780643]  ? _cond_resched+0x19/0x30
Mar  7 20:29:28 home-nas kernel: [  181.780647]  ? mutex_lock+0x13/0x40
Mar  7 20:29:28 home-nas kernel: [  181.780746]  ? 
dnode_rele_and_unlock+0x6c/0xe0 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780751]  ? _cond_resched+0x19/0x30
Mar  7 20:29:28 home-nas kernel: [  181.780755]  ? mutex_lock+0x13/0x40
Mar  7 20:29:28 home-nas kernel: [  181.780847]  ? 
dmu_object_info_from_dnode+0x84/0xb0 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.780975]  zfs_zget+0x1c3/0x270 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.781104]  zfs_dirent_lock+0x34b/0x680 
[zfs]
Mar  7 20:29:28 home-nas kernel: [  181.781232]  zfs_dirlook+0x90/0x2b0 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.781358]  ? zfs_zaccess+0x153/0x410 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.781484]  zfs_lookup+0x1fd/0x3f0 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.781608]  zpl_lookup+0xc9/0x1e0 [zfs]
Mar  7 20:29:28 home-nas kernel: [  181.781662]  ? security_capable+0x3d/0x60
Mar  7 20:29:28 home-nas kernel: [  181.781697]  __lookup_slow+0x92/0x160
Mar  7 20:29:28 home-nas kernel: [  181.781703]  lookup_slow+0x3b/0x60
Mar  7 20:29:28 home-nas kernel: [  181.781709]  walk_component+0x1da/0x360
Mar  7 20:29:28 home-nas kernel: [  181.781714]  ? 
link_path_walk.part.0+0x6d/0x550
Mar  7 20:29:28 home-n