On Thu, Jan 1, 2026 at 4:06 AM Thành Nguyễn Trần Phước <[email protected]> wrote: > > It is my first time writing to this mailing list. If there's anything > that I did wrong etiquette-wise, I hope for your forgiveness. > > I have been using Debian Testing without much problem (as in rare breaks > from time to time). But today, an error occurred that prevent the system > from booting. Systemd still ran, but the systemd-modules service did not > finish starting. I hard-resetted the laptop and changed to an older > kernel. After some searching around, I tried to recreate the problem > unsuccessfully. > > System Context: > - Hardware: Dell Latitude E5470 (Skylake architecture). I don't think I > have parallel port (the parallel port only comes with docking station > which I do not own). > - Kernel: 6.17.13+deb14-amd64 (Debian 6.17.13-1). > - Bug frequency: Intermittent. It happened ONCE on this kernel, but I > can not recreate it on subsequent reboots. > > Am I supposed to ignore this as a one-time freak accident? Or is there > something dangerous here that I should care about? > > Here's the excerpt of what I think is important from the journalctl > command. > > --- > > BUG: kernel NULL pointer dereference, address: 0000000000000000 > #PF: supervisor instruction fetch in kernel mode > #PF: error_code(0x0010) - not-present page > Oops: Oops: 0010 [#1] SMP PTI > CPU: 2 UID: 0 PID: 343 Comm: systemd-modules Not tainted > 6.17.13+deb14-amd64 #1 PREEMPT(lazy) Debian 6.17.13-1 > Hardware name: Dell Inc. Latitude E5470/0VHKV0, BIOS 1.34.3 11/20/2022 > RIP: 0010:0x0 > Code: Unable to access opcode bytes at 0xffffffffffffffd6. > RSP: 0000:ffffd0998064fa40 EFLAGS: 00010286 > RAX: 0000000000000000 RBX: ffff8bde160a0800 RCX: 0000000000000007 > RDX: ffffffffc116fac0 RSI: ffff8bde28714ca0 RDI: ffff8bde09b76800 > RBP: ffffd0998064fa98 R08: 00000000fffffff3 R09: 0000000000000000 > R10: ffff8bde1946c000 R11: fffff78544651a00 R12: ffff8bde160a0840 > R13: ffff8bde09b76850 R14: ffff8bde09b76800 R15: ffff8bde10767f68 > FS: 00007fd7004d6c80(0000) GS:ffff8be184308000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffffffffffffd6 CR3: 00000001353fe006 CR4: 00000000003706f0 > Call Trace: > <TASK> > parport_register_dev_model+0x26c/0x340 [parport] > lp_register+0x86/0x1b0 [lp] > ? __pfx_lp_preempt+0x10/0x10 [lp] > ? __pfx_port_check+0x10/0x10 [parport] > lp_attach+0x89/0x110 [lp] > port_check+0x24/0x30 [parport] > bus_for_each_dev+0x82/0xd0 > __parport_register_driver+0x82/0xb0 [parport] > lp_init_module+0x39f/0xff0 [lp] > ? __pfx_lp_init_module+0x10/0x10 [lp] > do_one_initcall+0x58/0x300 > do_init_module+0x62/0x250 > ? init_module_from_file+0x8a/0xe0 > init_module_from_file+0x8a/0xe0 > idempotent_init_module+0x114/0x310 > __x64_sys_finit_module+0x6d/0xd0 > do_syscall_64+0x82/0x320 > ? restore_fpregs_from_fpstate+0x46/0xa0 > ? switch_fpu_return+0x5b/0xe0 > ? do_syscall_64+0x200/0x320 > ? __x64_sys_openat+0x61/0xa0 > ? do_syscall_64+0xbb/0x320 > ? count_memcg_events+0xd6/0x220 > ? handle_mm_fault+0x1d6/0x2d0 > ? do_user_addr_fault+0x21a/0x690 > ? exc_page_fault+0x74/0x180 > entry_SYSCALL_64_after_hwframe+0x76/0x7e > RIP: 0033:0x7fd700311aa9 > Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 > 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d > 01 f0 ff ff 73 01 c3 48 8b 0d 37 13 10 00 f7 d8 64 8> > RSP: 002b:00007ffe8f710d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 > RAX: ffffffffffffffda RBX: 000055db35eb5570 RCX: 00007fd700311aa9 > RDX: 0000000000000004 RSI: 00007fd7004b144d RDI: 0000000000000009 > RBP: 0000000000000004 R08: 0000000000000000 R09: 000055db35eb73c0 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd7004b144d > R13: 0000000000020000 R14: 000055db35eb5690 R15: 0000000000000000 > </TASK> > Modules linked in: lp(+) parport_pc(+) nvme_fabrics parport i2c_dev > configfs efi_pstore nfnetlink efivarfs autofs4 ext4 crc16 mbcache jbd2 > crc32c_cryptoapi hid_logitech_hidpp hid_logitech_dj h> > CR2: 0000000000000000 > ---[ end trace 0000000000000000 ]--- > RIP: 0010:0x0 > Code: Unable to access opcode bytes at 0xffffffffffffffd6. > RSP: 0000:ffffd0998064fa40 EFLAGS: 00010286 > RAX: 0000000000000000 RBX: ffff8bde160a0800 RCX: 0000000000000007 > RDX: ffffffffc116fac0 RSI: ffff8bde28714ca0 RDI: ffff8bde09b76800 > RBP: ffffd0998064fa98 R08: 00000000fffffff3 R09: 0000000000000000 > R10: ffff8bde1946c000 R11: fffff78544651a00 R12: ffff8bde160a0840 > R13: ffff8bde09b76850 R14: ffff8bde09b76800 R15: ffff8bde10767f68 > FS: 00007fd7004d6c80(0000) GS:ffff8be184308000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffffffffffffd6 CR3: 00000001353fe006 CR4: 00000000003706f0
<https://wiki.debian.org/DebianKernelReportingBugs>.
