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We have experienced a kernel BPF null pointer dereference issue on all our machines since mid of June. It might be related to an upgrade of libvirt/kvm/qemu at that point of time. But we’re not sure.
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We experienced the kernel freeze on following Arch Linux kernels: - 5.7.0 (5.7.0-3-MANJARO x64) - 5.6.16 (5.6.16-1-MANJARO x64) - 5.4.44 (5.4.44-1-MANJARO x64) - 4.19.126 (4.19.126-1-MANJARO x64) - 4.14.183 (4.14.183-1-MANJARO x64) Kernel configs can be taken from https://gitlab.manjaro.org/packages/core. Subsequent e-mails will contain the relevant extracts from journal or netconsole logs. Help and support on this issue is welcome.
Linux Kernel 5.6.16 (5.6.16-1-MANJARO x64) BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 2 PID: 988 Comm: nfsd Not tainted 5.6.16-1-MANJARO #1 Hardware name: ASUS All Series/CS-B, BIOS 3602 03/26/2018 RIP: 0010:__cgroup_bpf_run_filter_skb+0x196/0x230 Code: 48 89 73 18 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 c0 c3 c3 e8 38 ef ec ff e8 f3 2d f2 ff 48 8b 85 38 06 00 00 31 ed <48> 8b 78 10 4c 8d 70 10 48 85 ff 74 34 49 8b 46 08 65 48 89 05 d1 RSP: 0018:ffffa3e54097f9f0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff962908bb82e0 RCX: 0000000000000034 RDX: 0000000000000000 RSI: ffff962907408900 RDI: ffffffffa2df2178 RBP: 0000000000000000 R08: ffff96290981ed20 R09: 000000000000fa4c R10: 0000000000007d26 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff96290ff00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 00000003e185e005 CR4: 00000000001626e0 Call Trace: ? __local_bh_enable_ip+0x33/0x70 ip_finish_output+0x68/0xa0 ip_output+0x76/0x130 ? __ip_local_out+0x4b/0x170 __ip_queue_xmit+0x186/0x440 ? __switch_to_asm+0x34/0x70 ? __switch_to_asm+0x40/0x70 __tcp_transmit_skb+0x53e/0xbf0 ? __switch_to_asm+0x34/0x70 tcp_write_xmit+0x391/0x11b0 __tcp_push_pending_frames+0x32/0xf0 do_tcp_sendpages+0x5f8/0x630 tcp_sendpage+0x48/0x80 inet_sendpage+0x52/0x90 kernel_sendpage+0x1a/0x30 svc_send_common+0x62/0x150 [sunrpc] svc_sendto+0xd7/0x240 [sunrpc] svc_tcp_sendto+0x36/0x50 [sunrpc] svc_send+0x7b/0x190 [sunrpc] nfsd+0xed/0x150 [nfsd] ? nfsd_destroy+0x60/0x60 [nfsd] kthread+0x117/0x130 ? __kthread_bind_mask+0x60/0x60 ret_from_fork+0x35/0x40 Modules linked in: rpcsec_gss_krb5 vhost_net vhost tap tun fuse bridge stp llc nct6775 hwmon_vid nls_iso8859_1 nls_cp437 vfat fat joydev mousedev input_leds intel_rapl_msr ofpart cmdlinepart intel_spi_platform intel_spi mei_wdt mei_hdcp spi_nor mtd iTCO_wdt iTCO_vendor_support eeepc_wmi asus_wmi battery sparse_keymap rfkill wmi_bmof intel_rapl_common snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm i915 irqbypass crct10dif_pclmul snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio crc32_pclmul snd_hda_intel i2c_algo_bit ghash_clmulni_intel snd_intel_dspcfg aesni_intel crypto_simd snd_hda_codec drm_kms_helper cryptd glue_helper intel_cstate pcspkr i2c_i801 intel_uncore snd_hda_core intel_rapl_perf snd_hwdep cec snd_pcm r8169 rc_core realtek intel_gtt snd_timer syscopyarea mei_me libphy lpc_ich snd mei e1000e sysfillrect soundcore sysimgblt fb_sys_fops wmi evdev mac_hid nfsd nfsv4 dns_resolver nfs_acl nfs lockd auth_rpcgss grace drm sunrpc fscache agpgart ip_tables x_tables ext4 crc16 mbcache jbd2 hid_logitech_hidpp hid_logitech_dj dm_thin_pool dm_persistent_data libcrc32c crc32c_generic dm_bio_prison dm_bufio hid_generic usbhid hid dm_mod crc32c_intel sr_mod xhci_pci cdrom xhci_hcd ehci_pci ehci_hcd CR2: 0000000000000010 ---[ end trace 50bcc1a93a161137 ]--- RIP: 0010:__cgroup_bpf_run_filter_skb+0x196/0x230 Code: 48 89 73 18 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 c0 c3 c3 e8 38 ef ec ff e8 f3 2d f2 ff 48 8b 85 38 06 00 00 31 ed <48> 8b 78 10 4c 8d 70 10 48 85 ff 74 34 49 8b 46 08 65 48 89 05 d1 RSP: 0018:ffffa3e54097f9f0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff962908bb82e0 RCX: 0000000000000034 RDX: 0000000000000000 RSI: ffff962907408900 RDI: ffffffffa2df2178 RBP: 0000000000000000 R08: ffff96290981ed20 R09: 000000000000fa4c R10: 0000000000007d26 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff96290ff00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 00000003e185e005 CR4: 00000000001626e0 note: nfsd[988] exited with preempt_count 1 -- Reboot --
