Public bug reported:
I just noticed the following in the kern.log, at the time the Acronis
backup started (assumption):
Aug 14 18:17:16 theater kernel: UBSAN: array-index-out-of-bounds in
snapapi26.c:802:20
Aug 14 18:17:16 theater kernel: index 1 is out of range for type
'pending_read_request [1]'
Aug 14 18:17:16 theater kernel: Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
Aug 14 18:17:16 theater kernel: Hardware name: To Be Filled By O.E.M. To Be
Filled By O.E.M./X470D4U, BIOS L3.41b 12/15/2020
Aug 14 18:17:16 theater kernel: Call Trace:
Aug 14 18:17:16 theater kernel: <TASK>
Aug 14 18:17:16 theater kernel: dump_stack_lvl+0x76/0xa0
Aug 14 18:17:16 theater kernel: dump_stack+0x10/0x20
Aug 14 18:17:16 theater kernel: __ubsan_handle_out_of_bounds+0xcb/0x110
Aug 14 18:17:16 theater kernel: destroy_pending_request+0x18f/0x1b0 [snapapi26]
Aug 14 18:17:16 theater kernel: ? srso_return_thunk+0x5/0x5f
Aug 14 18:17:16 theater kernel: pending_req_handler_thread+0x187/0x2e0
[snapapi26]
Aug 14 18:17:16 theater kernel: ? _raw_spin_lock_irqsave+0xe/0x20
Aug 14 18:17:16 theater kernel: ? __pfx_pending_req_handler_thread+0x10/0x10
[snapapi26]
Aug 14 18:17:16 theater kernel: kthread+0xfe/0x230
Aug 14 18:17:16 theater kernel: ? __pfx_kthread+0x10/0x10
Aug 14 18:17:16 theater kernel: ret_from_fork+0x47/0x70
Aug 14 18:17:16 theater kernel: ? __pfx_kthread+0x10/0x10
Aug 14 18:17:16 theater kernel: ret_from_fork_asm+0x1a/0x30
Aug 14 18:17:16 theater kernel: </TASK>
Aug 14 18:17:16 theater kernel: ---[ end trace ]---
(see attachment)
current kernel is
6.14.0-27-generic #27~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 22 17:38:49
UTC 2 x86_64 x86_64 x86_64 GNU/Linux
root@theater:/var/log# snap --version
snap 2.70
snapd 2.70
series 16
ubuntu 24.04
kernel 6.14.0-27-generic
root@theater:/etc/Acronis# cat /var/lib/Acronis/BackupAndRecovery_version.txt
MAJOR_VERSION=25
MINOR_VERSION=7
PATCH_VERSION=1
BUILD_NUMBER=40497
** Affects: ubuntu
Importance: Undecided
Status: New
** Attachment added: "kern.log logfile including the dump information"
https://bugs.launchpad.net/bugs/2120671/+attachment/5899188/+files/kern.log
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https://bugs.launchpad.net/bugs/2120671
Title:
UBSAN: array-index-out-of-bounds in snapapi26
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