This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1990236
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1990236
Title:
5.19.0-17.17: kernel NULL pointer dereference, address:
0000000000000084
Status in linux package in Ubuntu:
Incomplete
Bug description:
After upgrading to 5.19.0-17.17 from 5.19.0-16.16, system began to lock up
unexpectedly.
Log inspection showed this:
Sep 20 09:05:20 zeus kernel: BUG: kernel NULL pointer dereference, address:
0000000000000084
Sep 20 09:05:20 zeus kernel: #PF: supervisor read access in kernel mode
Sep 20 09:05:20 zeus kernel: #PF: error_code(0x0000) - not-present page
Sep 20 09:05:20 zeus kernel: PGD 0 P4D 0
Sep 20 09:05:20 zeus kernel: Oops: 0000 [#1] PREEMPT SMP PTI
Sep 20 09:05:20 zeus kernel: CPU: 6 PID: 4291 Comm: slack Tainted: P
OE 5.19.0-17-generic #17-Ubuntu
Sep 20 09:05:20 zeus kernel: Hardware name: HP HP ZBook Studio G5/8427, BIOS
Q71 Ver. 01.20.00 03/22/2022
Sep 20 09:05:20 zeus kernel: RIP: 0010:unix_fs_perm.part.0+0x50/0x1e0
Sep 20 09:05:20 zeus kernel: Code: 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8b
81 08 03 00 00 89 75 8c 48 85 c0 0f 85 b0 00 00 00 48 8b 91 70 02 00 00 48 8d
7d a0 <8b> 8a 84 00 00 00 0f b7 92 80 00 00 00 48 c7 45 9c 00 00 00 00 48
Sep 20 09:05:20 zeus kernel: RSP: 0018:ffffb014c7eb3ce0 EFLAGS: 00010246
Sep 20 09:05:20 zeus kernel: RAX: 0000000000000000 RBX: ffff94c0e0c7adb0 RCX:
ffff94be5003ac00
Sep 20 09:05:20 zeus kernel: RDX: 0000000000000000 RSI: 0000000000000004 RDI:
ffffb014c7eb3cf8
Sep 20 09:05:20 zeus kernel: RBP: ffffb014c7eb3d58 R08: 0000000000000002 R09:
0000000000000000
Sep 20 09:05:20 zeus kernel: R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000004
Sep 20 09:05:20 zeus kernel: R13: 0000000000000002 R14: ffffffffa044fe92 R15:
ffff94be5003ac00
Sep 20 09:05:20 zeus kernel: FS: 00007f6b47927c00(0000)
GS:ffff94c47bd80000(0000) knlGS:0000000000000000
Sep 20 09:05:20 zeus kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Sep 20 09:05:20 zeus kernel: CR2: 0000000000000084 CR3: 000000013e1b4003 CR4:
00000000003706e0
Sep 20 09:05:20 zeus kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
Sep 20 09:05:20 zeus kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
Sep 20 09:05:20 zeus kernel: Call Trace:
Sep 20 09:05:20 zeus kernel: <TASK>
Sep 20 09:05:20 zeus kernel: aa_unix_file_perm+0x2f2/0x400
Sep 20 09:05:20 zeus kernel: aa_sock_file_perm+0x5c/0x80
Sep 20 09:05:20 zeus kernel: aa_file_perm+0x288/0x2e0
Sep 20 09:05:20 zeus kernel: apparmor_file_permission+0x71/0x1a0
Sep 20 09:05:20 zeus kernel: security_file_permission+0x36/0x70
Sep 20 09:05:20 zeus kernel: rw_verify_area+0x35/0x80
Sep 20 09:05:20 zeus kernel: vfs_read+0x6c/0x1b0
Sep 20 09:05:20 zeus kernel: ksys_read+0xc9/0x100
Sep 20 09:05:20 zeus kernel: __x64_sys_read+0x19/0x30
Sep 20 09:05:20 zeus kernel: do_syscall_64+0x58/0x90
Sep 20 09:05:20 zeus kernel: entry_SYSCALL_64_after_hwframe+0x63/0xcd
Sep 20 09:05:20 zeus kernel: RIP: 0033:0x7f6b46c68474
Sep 20 09:05:20 zeus kernel: Code: 84 00 00 00 00 00 41 54 55 49 89 d4 53 48
89 f5 89 fb 48 83 ec 10 e8 8b fc ff ff 4c 89 e2 41 89 c0 48 89 ee 89 df 31 c0
0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 48 89 44 24 08 e8 c7 fc ff ff 48
Sep 20 09:05:20 zeus kernel: RSP: 002b:00007ffc54391700 EFLAGS: 00000246
ORIG_RAX: 0000000000000000
Sep 20 09:05:20 zeus kernel: RAX: ffffffffffffffda RBX: 0000000000000028 RCX:
00007f6b46c68474
Sep 20 09:05:20 zeus kernel: RDX: 0000000000000008 RSI: 00007ffc54391800 RDI:
0000000000000028
Sep 20 09:05:20 zeus kernel: RBP: 00007ffc54391800 R08: 0000000000000000 R09:
0000000000000000
Sep 20 09:05:20 zeus kernel: R10: 0000000000000000 R11: 0000000000000246 R12:
0000000000000008
Sep 20 09:05:20 zeus kernel: R13: 0000000000000028 R14: 00007ffc54391800 R15:
0000000000000000
I'll attach the full log.
The presence apparmor in the trace correlates with the ton of permission
problem that this kernel introduced (Chrome and Slack no longer starting, see
https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1990064).
---
ProblemType: Bug
ApportVersion: 2.23.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
DistroRelease: Ubuntu 22.10
InstallationDate: Installed on 2017-09-26 (1819 days ago)
InstallationMedia: Ubuntu-Server 17.10 "Artful Aardvark" - Alpha amd64
(20170924)
NonfreeKernelModules: nvidia_modeset nvidia
Package: linux (not installed)
Tags: kinetic
Uname: Linux 5.18.8-051808-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: Upgraded to kinetic on 2022-05-22 (120 days ago)
UserGroups: cdrom dialout dip docker libvirt lpadmin lxd plugdev render
sambashare src sudo tss tty uucp video wireshark
_MarkForUpload: True
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