** Also affects: zfs-linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: zfs-linux (Ubuntu Hirsute)
Importance: Medium
Assignee: Colin Ian King (colin-king)
Status: In Progress
** Also affects: zfs-linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: zfs-linux (Ubuntu Hirsute)
Status: In Progress => Fix Released
** Changed in: zfs-linux (Ubuntu Groovy)
Status: New => Fix Released
** Changed in: zfs-linux (Ubuntu Groovy)
Importance: Undecided => Medium
** Changed in: zfs-linux (Ubuntu Groovy)
Assignee: (unassigned) => Colin Ian King (colin-king)
** Changed in: zfs-linux (Ubuntu Focal)
Status: New => In Progress
** Changed in: zfs-linux (Ubuntu Focal)
Importance: Undecided => High
** Changed in: zfs-linux (Ubuntu Focal)
Assignee: (unassigned) => Colin Ian King (colin-king)
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to zfs-linux in Ubuntu.
https://bugs.launchpad.net/bugs/1904589
Title:
zfs PANIC: accessing past end of object in 0.8.3-1ubuntu12.4
Status in zfs-linux package in Ubuntu:
Fix Released
Status in zfs-linux source package in Focal:
In Progress
Status in zfs-linux source package in Groovy:
Fix Released
Status in zfs-linux source package in Hirsute:
Fix Released
Bug description:
Using latest zfs 0.8.3-1ubuntu12.4 on latest Ubuntu 20.04.1, I observe
a rare zfs panics that seem to be workload-specific which render a
server mostly unresponsive besides ssh still working. Attempting to
reboot the server in this state makes the shutdown hang forever.
You may want to consider backporting the fix released in zfs 0.8.4
into 20.04: https://github.com/openzfs/zfs/pull/10148
Log sample of panic:
```
Nov 17 16:06:15 hostname kernel: [3385134.716024] PANIC: zfs: accessing past
end of object c1c/2db52f (size=17408 access=7492+16428)
Nov 17 16:06:15 hostname kernel: [3385134.716072] Showing stack for process
3166846
Nov 17 16:06:15 hostname kernel: [3385134.716074] CPU: 25 PID: 3166846 Comm:
node Tainted: P O 5.4.0-48-generic #52-Ubuntu
Nov 17 16:06:15 hostname kernel: [3385134.716075] Hardware name: <hardware>
Nov 17 16:06:15 hostname kernel: [3385134.716076] Call Trace:
Nov 17 16:06:15 hostname kernel: [3385134.716085] dump_stack+0x6d/0x9a
Nov 17 16:06:15 hostname kernel: [3385134.716097] spl_dumpstack+0x29/0x2b
[spl]
Nov 17 16:06:15 hostname kernel: [3385134.716102] vcmn_err.cold+0x60/0x99
[spl]
Nov 17 16:06:15 hostname kernel: [3385134.716106] ? _cond_resched+0x19/0x30
Nov 17 16:06:15 hostname kernel: [3385134.716108] ?
__kmalloc_node+0x20e/0x330
Nov 17 16:06:15 hostname kernel: [3385134.716113] ?
spl_kmem_alloc_impl+0xa8/0x100 [spl]
Nov 17 16:06:15 hostname kernel: [3385134.716190] ? __list_add+0x17/0x40
[zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716235]
zfs_panic_recover+0x6f/0x90 [zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716272] ?
dsl_dir_tempreserve_impl.isra.0.constprop.0+0xed/0x330 [zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716305]
dmu_buf_hold_array_by_dnode+0x3a0/0x490 [zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716338]
dmu_write_uio_dnode+0x4c/0x140 [zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716370]
dmu_write_uio_dbuf+0x4f/0x70 [zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716416] zfs_write+0xa1f/0xd40 [zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716419] ? d_absolute_path+0x74/0xb0
Nov 17 16:06:15 hostname kernel: [3385134.716421] ? __switch_to_asm+0x34/0x70
Nov 17 16:06:15 hostname kernel: [3385134.716423] ? __switch_to_asm+0x40/0x70
Nov 17 16:06:15 hostname kernel: [3385134.716424] ? __switch_to_asm+0x40/0x70
Nov 17 16:06:15 hostname kernel: [3385134.716425] ? __switch_to_asm+0x34/0x70
Nov 17 16:06:15 hostname kernel: [3385134.716427] ? __switch_to_asm+0x34/0x70
Nov 17 16:06:15 hostname kernel: [3385134.716474]
zpl_write_common_iovec+0xad/0x120 [zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716567] zpl_iter_write+0x56/0x90
[zfs]
Nov 17 16:06:15 hostname kernel: [3385134.716570] do_iter_write+0x84/0x1a0
Nov 17 16:06:15 hostname kernel: [3385134.716574] ? futex_wake+0x8b/0x180
Nov 17 16:06:15 hostname kernel: [3385134.716577] do_writev+0x71/0x120
Nov 17 16:06:15 hostname kernel: [3385134.716581] do_syscall_64+0x57/0x190
Nov 17 16:06:15 hostname kernel: [3385134.716584] RIP: 0033:0x7fa366eee0cd
Nov 17 16:06:15 hostname kernel: [3385134.716587] RSP: 002b:00007fa35e7fbde0
EFLAGS: 00000293 ORIG_RAX: 0000000000000014
Nov 17 16:06:15 hostname kernel: [3385134.716590] RDX: 000000000000000c RSI:
000000000651c7b0 RDI: 000000000000001d
```
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