Re: Potential Bug Report

On 08.10.2019 14:55, Informationstechnik Würfl wrote:

Hi Heiner,

i just wanted to inform you about a potential bug since Kernel 5.3 (since the realtek driver has been renamed and refactored).

Booting with Kernels > 5.2 always result in a kernel oops (r8169,libphy), i guess that in the structure  handed over to phy_modify_paged tp->phy_dev is null, instead a correct value or something like that.
My lspci for the network card lists:

22:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)

Maybe its of use and other people have the same issues.

Thanks for the report. I think in your case simply the Realtek PHY driver module isn't available.
If you build it the problem should disappear. Nevertheless we may have to improve the Kconfig
dependencies for r8169 to prevent such cases.
Can you provide a full dmesg output and your kernel config?

Regards 

Wolfgang

Heiner

BUG: kernel NULL pointer dereference, address: 0000000000000000
Okt 08 08:48:11 gentoo kernel: #PF: supervisor instruction fetch in kernel mode
Okt 08 08:48:11 gentoo kernel: #PF: error_code(0x0010) - not-present page
Okt 08 08:48:11 gentoo kernel: PGD 0 P4D 0 


Okt 08 08:48:11 gentoo kernel: Oops: 0010 [#1] PREEMPT SMP
Okt 08 08:48:11 gentoo kernel: CPU: 9 PID: 7119 Comm: NetworkManager Tainted: P           O      5.4.0-rc2-BeoCore #1
Okt 08 08:48:11 gentoo kernel: Hardware name: Micro-Star International Co., Ltd MS-7B86/B450 GAMING PLUS MAX (MS-7B86), BIOS H.30 09/18/2019
Okt 08 08:48:11 gentoo kernel: RIP: 0010:0x0
Okt 08 08:48:11 gentoo kernel: Code: Bad RIP value.
Okt 08 08:48:11 gentoo kernel: RSP: 0018:ffffc900006ab528 EFLAGS: 00010246
Okt 08 08:48:11 gentoo kernel: RAX: ffffffffa00c72e0 RBX: 0000000000000004 RCX: 0000000000000004
Okt 08 08:48:11 gentoo kernel: RDX: ff ff8887ce6ba3c0 RSI: 0000000000000a43 RDI: ffff8887f58a0000
Okt 08 08:48:11 gentoo kernel: RBP: ffff8887f58a0000 R08: 0000000000000000 R09: 0000000000000000
Okt 08 08:48:11 gentoo kernel: R10: 0000000000000002 R11: 000000000000000f R12: 0000000000000009
Okt 08 08:48:11 gentoo kernel: R13: 0000000000000a43 R14: 0000000000000010 R15: ffff8887f2a38840
Okt 08 08:48:11 gentoo kernel: FS:  00007fe83535a880(0000) GS:ffff8887fea40000(0000) knlGS:0000000000000000
Okt 08 08:48:11 gentoo kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Okt 08 08:48:11 gentoo kernel: CR2: ffffffffffffffd6 CR3: 00000007cd919000 CR4: 0000000000340ee0
Okt 08 08:48:11 gentoo kernel: Call Trace:
Okt 08 08:48:11 gentoo kernel:  phy_select_page+0x2b/0x60 [libphy]
Okt 08 08:48:11 gentoo kernel:  phy_modify_paged_changed+0x18/0x50 [libphy]
Okt 08 08:48:11 gentoo kernel:  phy_modify_paged+0 xc/0x20 [libphy]
Okt 08 08:48:11 gentoo kernel:  rtl8168h_2_hw_phy_config+0x253/0x2e0 [r8169]
Okt 08 08:48:11 gentoo kernel:  rtl8169_init_phy+0x20/0x80 [r8169]
Okt 08 08:48:11 gentoo kernel:  rtl_open+0x3bc/0x580 [r8169]
Okt 08 08:48:11 gentoo kernel:  __dev_open+0x91/0x110
Okt 08 08:48:11 gentoo kernel:  __dev_change_flags+0x155/0x1b0
Okt 08 08:48:11 gentoo kernel:  dev_change_flags+0x1c/0x50
Okt 08 08:48:11 gentoo kernel:  do_setlink+0x678/0xd80
Okt 08 08:48:11 gentoo kernel:  ? blk_mq_flush_plug_list+0x207/0x2b0
Okt 08 08:48:11 gentoo kernel:  ? inet6_validate_link_af+0x47/0xc0
Okt 08 08:48:11 gentoo kernel:  ? __nla_validate_parse+0x43/0x770
Okt 08 08:48:11 gentoo kernel:  ? __snmp6_fill_stats64.isra.0+0x53/0xe0
Okt 08 08:48:11 gentoo kernel:  __rtnl_newlink+0x545/0x8a0
Okt 08 08:48:11 gento o kernel:  ? __nla_reserve+0x38/0x50
Okt 08 08:48:11 gentoo kernel:  ? ___cache_free+0x1c/0x1d0
Okt 08 08:48:11 gentoo kernel:  ? pskb_expand_head+0xfa/0x2c0
Okt 08 08:48:11 gentoo kernel:  ? preempt_count_add+0x63/0x90
Okt 08 08:48:11 gentoo kernel:  ? _raw_spin_lock_irqsave+0x14/0x40
Okt 08 08:48:11 gentoo kernel:  ? __netlink_sendskb+0x2f/0x40
Okt 08 08:48:11 gentoo kernel:  ? _raw_spin_lock+0xe/0x30
Okt 08 08:48:11 gentoo kernel:  ? _raw_spin_lock_irq+0x20/0x30
Okt 08 08:48:11 gentoo kernel:  ? dbuf_rele_and_unlock+0x5a4/0x6d0 [zfs]
Okt 08 08:48:11 gentoo kernel:  ? kmem_cache_alloc_trace+0x141/0x1b0
Okt 08 08:48:11 gentoo kernel:  rtnl_newlink+0x3f/0x60
Okt 08 08:48:11 gentoo kernel:  rtnetlink_rcv_msg+0x10c/0x370
Okt 08 08:48:11 gentoo kernel:  ? dmu_buf_hold_array_by_bonus+0x17e/0x1c0 [zfs]
Okt 08 08:48:11 gentoo kernel:  ? rtnl_calcit.isra.0+0xe0/0xe0
Okt 08 08:48:11 gentoo kernel:  netlink_rcv_skb+0x41/0x110
Okt 08 08:48:11 gentoo kernel:  netlink_unicast+0x142/0x1d0
Okt 08 08:48:11 gentoo kernel:  netlink_sendmsg+0x1b8/0x3c0
Okt 08 08:48:11 gentoo kernel:  ? netlink_unicast+0x1d0/0x1d0
Okt 08 08:48:11 gentoo kernel:  ___sys_sendmsg+0x29d/0x2f0
Okt 08 08:48:11 gentoo kernel:  ? alloc_set_pte+0xf1/0x580
Okt 08 08:48:11 gentoo kernel:  ? filemap_map_pages+0x22d/0x300
Okt 08 08:48:11 gentoo kernel:  ? _raw_spin_unlock+0xd/0x20
Okt 08 08:48:11 gentoo kernel:  ? __handle_mm_fault+0xde1/0x1060
Okt 08 08:48:11 gentoo kernel:  ? __fget+0x6c/0xa0
Okt 08 08:48:11 gentoo kernel:  __sys_sendmsg+0x44/0x80
Okt 08 08:48:11 gentoo kernel:  do_syscall_64+0x4a/0x190
Okt 08 08:48:11 gent oo kernel:  entry_SYSCALL_64_after_hwframe+0x44/0xa9


Okt 08 08:48:11 gentoo kernel: RIP: 0033:0x7fe835b92649
Okt 08 08:48:11 gentoo kernel: Code: 00 89 54 24 1c 48 89 74 24 10 89 7c 24 08 e8 3e e8 ff ff 41 89 c0 8b 54 24 1c 48 8b 74 24 10 b8 2e 00 00 00 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 37 44 89 c7 48 89 44 24 08 e8 72 e8 ff ff 48
Okt 08 08:48:11 gentoo kernel: RSP: 002b:00007ffff5e76300 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
Okt 08 08:48:11 gentoo kernel: RAX: ffffffffffffffda RBX: 000055e197f3d300 RCX: 00007fe835b92649
Okt 08 08:48:11 gentoo kernel: RDX: 0000000000000000 RSI: 00007ffff5e76360 RDI: 000000000000000a
Okt 08 08:48:11 gentoo kernel: RBP: 00007ffff5e76360 R08: 0000000000000000 R09: 0000000000000000
Okt 08 08:48:11 gentoo kernel: R10: 0000000000000001 R11: 0000000000000293 R12: 000055e197f3d300
Okt 08 08:48:11 gentoo kernel: R13: 00007 ffff5e76518 R14: 00007ffff5e7650c R15: 0000000000000000
Okt 08 08:48:11 gentoo kernel: Modules linked in: kvm_amd kvm irqbypass ppdev snd_hda_codec_ca0132 snd_hda_codec_hdmi snd_hda_intel snd_intel_nhlt aesni_intel snd_hda_codec glue_helper crypto_simd cryptd snd_hda_core snd_hwdep hid_holtek_mouse snd_pcm jo>
Okt 08 08:48:11 gentoo kernel:  hid_logitech hid_gyration hid_ezkey hid_cypress hid_chicony hid_cherry hid_a4tech sl811_hcd xhci_plat_hcd ohci_pci ohci_hcd uhci_hcd ehci_pci ehci_hcd aic94xx libsas lpfc crc_t10dif crct10dif_common qla2xxx megaraid_sas me>
Okt 08 08:48:11 gentoo kernel:  pata_pdc2027x pata_mpiix usb_storage led_class usbhid xhci_pci r8169 xhci_hcd ahci libahci libphy usbcore libata usb_common parport
Okt 08 08:48:11 gentoo kernel: CR2: 0000000000000000
Okt 08 08:48:11 gentoo kernel: ---[ end trace 648d7ccfb58c01c8 ]---
Okt 08 08:48:11 gentoo kernel: RIP: 0010:0x0
Okt 08 08:48: 11 gentoo kernel: Code: Bad RIP value.
Okt 08 08:48:11 gentoo kernel: RSP: 0018:ffffc900006ab528 EFLAGS: 00010246
Okt 08 08:48:11 gentoo kernel: RAX: ffffffffa00c72e0 RBX: 0000000000000004 RCX: 0000000000000004
Okt 08 08:48:11 gentoo kernel: RDX: ffff8887ce6ba3c0 RSI: 0000000000000a43 RDI: ffff8887f58a0000
Okt 08 08:48:11 gentoo kernel: RBP: ffff8887f58a0000 R08: 0000000000000000 R09: 0000000000000000
Okt 08 08:48:11 gentoo kernel: R10: 0000000000000002 R11: 000000000000000f R12: 0000000000000009
Okt 08 08:48:11 gentoo kernel: R13: 0000000000000a43 R14: 0000000000000010 R15: ffff8887f2a38840
Okt 08 08:48:11 gentoo kernel: FS:  00007fe83535a880(0000) GS:ffff8887fea40000(0000) knlGS:0000000000000000
Okt 08 08:48:11 gentoo kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Okt 08 08:48:11 gentoo kernel: CR2: ffffffffffffffd6 CR3: 00000007cd919000 CR4: 0000000000340ee0
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