Hi, I am facing this problem with debian stable, but kernel from backports:
ii linux-image-4.19.0-0.bpo.1-amd64-unsigned 4.19.12-1~bpo9+1 amd64 Linux 4.19 for 64-bit PCs Linux version 4.19.0-0.bpo.1-amd64 (debian-kernel@lists.debian.org) (gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)) #1 SMP Debian 4.19.12-1~bpo9+1 (2018-12-30) The problem appear around twice a day while copying data via rsync to software raid disk array. Jan 15 22:31:48 kk-router kernel: [ 6406.089208] general protection fault: 0000 [#1] SMP PTI Jan 15 22:31:48 kk-router kernel: [ 6406.089330] CPU: 2 PID: 1183 Comm: sshd Tainted: G E 4.19.0-0.bpo.1-amd64 #1 Debian 4.19.12-1~bpo9+1 Jan 15 22:31:48 kk-router kernel: [ 6406.089598] Hardware name: Gigabyte Technology Co., Ltd. Default string/J3455N-D3H, BIOS F2 03/07/2017 Jan 15 22:31:48 kk-router kernel: [ 6406.089751] RIP: 0010:__check_object_size+0x7b/0x1a0 Jan 15 22:31:48 kk-router kernel: [ 6406.089834] Code: 00 00 80 48 2b 15 5d 0e c7 00 48 01 c2 48 c1 ea 0c 48 c1 e2 06 48 03 15 3b 0e c7 00 48 8b 42 08 48 8d 48 ff a8 01 48 0f 45 d1 <48> 8b 4a 08 48 8d 41 ff 83 e1 01 48 0f 44 c2 48 8b 00 f6 c4 01 75 Jan 15 22:31:48 kk-router kernel: [ 6406.090115] RSP: 0018:ffff96f9415dfc58 EFLAGS: 00010202 Jan 15 22:31:48 kk-router kernel: [ 6406.090202] RAX: efffd06949355a01 RBX: ffff896a0d56cc02 RCX: efffd06949355a00 Jan 15 22:31:48 kk-router kernel: [ 6406.090314] RDX: efffd06949355a00 RSI: ffff896a3fff0000 RDI: ffff896a8d56cc02 Jan 15 22:31:48 kk-router kernel: [ 6406.090426] RBP: 00000000000005a8 R08: 00000000000005a8 R09: 00000000000005a8 Jan 15 22:31:48 kk-router kernel: [ 6406.090538] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 Jan 15 22:31:48 kk-router kernel: [ 6406.090650] R13: ffff896a0d56d1aa R14: 00000000000005a8 R15: ffff896a0d56cc02 Jan 15 22:31:48 kk-router kernel: [ 6406.090764] FS: 00007ff8efe39d40(0000) GS:ffff896a37b00000(0000) knlGS:0000000000000000 Jan 15 22:31:48 kk-router kernel: [ 6406.090890] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jan 15 22:31:48 kk-router kernel: [ 6406.090982] CR2: 00007fadf5efbfb0 CR3: 0000000265ebc000 CR4: 00000000003406e0 Jan 15 22:31:48 kk-router kernel: [ 6406.091095] Call Trace: Jan 15 22:31:48 kk-router kernel: [ 6406.091152] skb_copy_datagram_iter+0x75/0x260 Jan 15 22:31:48 kk-router kernel: [ 6406.091232] tcp_recvmsg+0x72b/0xca0 Jan 15 22:31:48 kk-router kernel: [ 6406.091300] ? aa_sk_perm+0x44/0x130 Jan 15 22:31:48 kk-router kernel: [ 6406.091366] inet_recvmsg+0x5b/0xd0 Jan 15 22:31:48 kk-router kernel: [ 6406.091430] sock_read_iter+0x94/0xf0 Jan 15 22:31:48 kk-router kernel: [ 6406.091498] new_sync_read+0xfa/0x160 Jan 15 22:31:48 kk-router kernel: [ 6406.091565] vfs_read+0x91/0x130 Jan 15 22:31:48 kk-router kernel: [ 6406.091624] ksys_read+0x52/0xc0 Jan 15 22:31:48 kk-router kernel: [ 6406.091685] do_syscall_64+0x55/0x110 Jan 15 22:31:48 kk-router kernel: [ 6406.091752] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Jan 15 22:31:48 kk-router kernel: [ 6406.091837] RIP: 0033:0x7ff8edfad6d0 Jan 15 22:31:48 kk-router kernel: [ 6406.091900] Code: b6 fe ff ff 48 8d 3d 17 be 08 00 48 83 ec 08 e8 06 db 01 00 66 0f 1f 44 00 00 83 3d 39 30 2c 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 de 9b 01 00 48 89 04 24 Jan 15 22:31:48 kk-router kernel: [ 6406.092180] RSP: 002b:00007ffe060775a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 Jan 15 22:31:48 kk-router kernel: [ 6406.092301] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff8edfad6d0 Jan 15 22:31:48 kk-router kernel: [ 6406.092413] RDX: 0000000000004000 RSI: 00007ffe060775b0 RDI: 0000000000000003 Jan 15 22:31:48 kk-router kernel: [ 6406.092525] RBP: 00005572caec33e0 R08: 0000000000000000 R09: 0000000000004500 Jan 15 22:31:48 kk-router kernel: [ 6406.092637] R10: 00007ffe0607b530 R11: 0000000000000246 R12: 0000000000000000 Jan 15 22:31:48 kk-router kernel: [ 6406.092748] R13: 00007ffe0607b63f R14: 00005572c925cb67 R15: 0000000000000003 Jan 15 22:31:48 kk-router kernel: [ 6406.092862] Modules linked in: snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) nls_ascii(E) intel_rapl(E) nls_cp437(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) vfat(E) coretemp(E) fat(E) efi_pstore(E) kvm(E) irqbypass(E) snd_soc_skl(E) snd_soc_skl_ipc(E) snd_soc_sst_ipc(E) crct10dif_pclmul(E) snd_soc_sst_dsp(E) snd_hda_ext_core(E) ppdev(E) snd_soc_acpi_intel_match(E) snd_soc_acpi(E) crc32_pclmul(E) i915(E) snd_soc_core(E) snd_compress(E) snd_hda_intel(E) ghash_clmulni_intel(E) intel_cstate(E) drm_kms_helper(E) intel_rapl_perf(E) snd_hda_codec(E) drm(E) evdev(E) snd_hda_core(E) i2c_algo_bit(E) snd_hwdep(E) efivars(E) pcspkr(E) snd_pcm(E) lpc_ich(E) snd_timer(E) snd(E) mei_me(E) soundcore(E) mei(E) sg(E) button(E) parport_pc(E) parport(E) video(E) pcc_cpufreq(E) nfsd(E) auth_rpcgss(E) Jan 15 22:31:48 kk-router kernel: [ 6406.094025] nfs_acl(E) lockd(E) grace(E) sunrpc(E) efivarfs(E) ip_tables(E) x_tables(E) autofs4(E) ext4(E) crc16(E) mbcache(E) jbd2(E) fscrypto(E) ecb(E) raid10(E) raid1(E) raid0(E) multipath(E) linear(E) raid456(E) async_raid6_recov(E) async_memcpy(E) async_pq(E) async_xor(E) async_tx(E) xor(E) raid6_pq(E) libcrc32c(E) crc32c_generic(E) md_mod(E) hid_generic(E) usbhid(E) hid(E) sd_mod(E) crc32c_intel(E) xhci_pci(E) aesni_intel(E) xhci_hcd(E) aes_x86_64(E) crypto_simd(E) usbcore(E) cryptd(E) usb_common(E) glue_helper(E) ahci(E) libahci(E) r8169(E) libata(E) i2c_i801(E) libphy(E) scsi_mod(E) fan(E) thermal(E) Jan 15 22:31:48 kk-router kernel: [ 6406.094981] ---[ end trace 51787b6133d8b572 ]--- Jan 15 22:31:49 kk-router kernel: [ 6407.221689] RIP: 0010:__check_object_size+0x7b/0x1a0 Jan 15 22:31:49 kk-router kernel: [ 6407.221737] Code: 00 00 80 48 2b 15 5d 0e c7 00 48 01 c2 48 c1 ea 0c 48 c1 e2 06 48 03 15 3b 0e c7 00 48 8b 42 08 48 8d 48 ff a8 01 48 0f 45 d1 <48> 8b 4a 08 48 8d 41 ff 83 e1 01 48 0f 44 c2 48 8b 00 f6 c4 01 75 Jan 15 22:31:49 kk-router kernel: [ 6407.222203] RSP: 0018:ffff96f9415dfc58 EFLAGS: 00010202 Jan 15 22:31:49 kk-router kernel: [ 6407.222236] RAX: efffd06949355a01 RBX: ffff896a0d56cc02 RCX: efffd06949355a00 Jan 15 22:31:49 kk-router kernel: [ 6407.222278] RDX: efffd06949355a00 RSI: ffff896a3fff0000 RDI: ffff896a8d56cc02 Jan 15 22:31:49 kk-router kernel: [ 6407.222662] RBP: 00000000000005a8 R08: 00000000000005a8 R09: 00000000000005a8 Jan 15 22:31:49 kk-router kernel: [ 6407.222703] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 Jan 15 22:31:49 kk-router kernel: [ 6407.223088] R13: ffff896a0d56d1aa R14: 00000000000005a8 R15: ffff896a0d56cc02 Jan 15 22:31:49 kk-router kernel: [ 6407.223130] FS: 00007ff8efe39d40(0000) GS:ffff896a37b80000(0000) knlGS:0000000000000000 Jan 15 22:31:49 kk-router kernel: [ 6407.223519] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jan 15 22:31:49 kk-router kernel: [ 6407.223553] CR2: 00007f74c23605e0 CR3: 0000000265ebc000 CR4: 00000000003406e0