Public bug reported: 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). ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Attachment added: "boot log" https://bugs.launchpad.net/bugs/1990236/+attachment/5617325/+files/boot-crash.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1990236/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
