UBSAN messages from my dmesg output: [ 1202.086307] ================================================================================ [ 1202.086308] UBSAN: Undefined behaviour in ./include/uapi/linux/swab.h:179:9 [ 1202.086309] load of misaligned address 0000000023eea967 for type 'const __u32' [ 1202.086309] which requires 4 byte alignment [ 1202.086310] CPU: 4 PID: 0 Comm: swapper/4 Tainted: P O T 4.19.8-gentoo #4 [ 1202.086311] Hardware name: ASUSTeK COMPUTER INC. G752VY/G752VY, BIOS G752VY.304 06/29/2017 [ 1202.086311] Call Trace: [ 1202.086312] <IRQ> [ 1202.086314] dump_stack+0xa1/0x11b [ 1202.086315] ubsan_epilogue+0x9/0x40 [ 1202.086317] ubsan_type_mismatch_common+0x17b/0x190 [ 1202.086319] __ubsan_handle_type_mismatch+0x43/0x60 [ 1202.086320] tcp_sacktag_write_queue+0x27cd/0x2fd0 [ 1202.086323] ? vprintk_emit+0xfc/0x330 [ 1202.086325] tcp_ack+0xb66/0x2970 [ 1202.086327] tcp_rcv_established+0x367/0x1350 [ 1202.086329] tcp_v4_do_rcv+0x119/0x630 [ 1202.086330] tcp_v4_rcv+0x1dec/0x2170 [ 1202.086332] ip_local_deliver_finish+0x106/0x6a0 [ 1202.086334] ip_local_deliver+0xc4/0x1c0 [ 1202.086335] ? ip_sublist_rcv+0x7f0/0x7f0 [ 1202.086337] ip_rcv+0x7b/0x100 [ 1202.086338] ? nf_hook.constprop.9+0x2f0/0x2f0 [ 1202.086339] ? ip_local_deliver+0x1c0/0x1c0 [ 1202.086340] __netif_receive_skb_one_core+0x6b/0xd0 [ 1202.086342] ? swiotlb_sync_single_for_cpu+0x10/0x10 [ 1202.086343] netif_receive_skb_internal+0x42/0x180 [ 1202.086344] napi_gro_receive+0x13e/0x1d0 [ 1202.086346] ? swiotlb_sync_single_for_cpu+0x10/0x10 [ 1202.086348] rtl8169_poll+0x3a2/0x1630 [r8169] [ 1202.086350] net_rx_action+0x39b/0x11d0 [ 1202.086352] __do_softirq+0x1ee/0x86e [ 1202.086354] irq_exit+0xae/0x110 [ 1202.086355] do_IRQ+0xa1/0x150 [ 1202.086357] common_interrupt+0xf/0xf [ 1202.086357] </IRQ> [ 1202.086359] RIP: 0010:cpuidle_enter_state+0x116/0x650 [ 1202.086360] Code: 48 c7 44 24 18 00 00 00 00 0f 1f 44 00 00 31 ff e8 9f 82 ba fe 45 84 ff 0f 85 5d 02 00 00 e8 61 2d d6 fe fb 66 0f 1f 44 00 00 <4c> 8b 2c 24 4d 29 f5 0f 80 fa 02 00 00 4c 89 e8 48 ba cf f7 53 e3 [ 1202.086360] RSP: 0018:ffffb716000d7e48 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd9 [ 1202.086362] RAX: 0000000000000000 RBX: ffffd715ffd08a00 RCX: 000000000000001f [ 1202.086362] RDX: 0000000000000096 RSI: 000000003161f9ae RDI: 0000000000000000 [ 1202.086363] RBP: ffffffff96b9b3d8 R08: 0000000000000000 R09: 0000000000000000 [ 1202.086364] R10: ffffb716000d7e08 R11: 0000000000000425 R12: 0000000000000007 [ 1202.086364] R13: 0000000000000004 R14: 00000117e1d26493 R15: 0000000000000000 [ 1202.086366] ? cpuidle_enter_state+0x10f/0x650 [ 1202.086367] do_idle+0x1ec/0x2c0 [ 1202.086368] cpu_startup_entry+0x77/0x90 [ 1202.086370] start_secondary+0x206/0x2e0 [ 1202.086371] secondary_startup_64+0xb6/0xc0 [ 1202.086372] ================================================================================ [ 1202.086373] ================================================================================ [ 1202.086374] UBSAN: Undefined behaviour in ./include/uapi/linux/swab.h:179:9 [ 1202.086374] load of misaligned address 00000000dc38e923 for type 'const __u32' [ 1202.086375] which requires 4 byte alignment [ 1202.086376] CPU: 4 PID: 0 Comm: swapper/4 Tainted: P O T 4.19.8-gentoo #4 [ 1202.086376] Hardware name: ASUSTeK COMPUTER INC. G752VY/G752VY, BIOS G752VY.304 06/29/2017 [ 1202.086377] Call Trace: [ 1202.086377] <IRQ> [ 1202.086379] dump_stack+0xa1/0x11b [ 1202.086380] ubsan_epilogue+0x9/0x40 [ 1202.086382] ubsan_type_mismatch_common+0x17b/0x190 [ 1202.086383] __ubsan_handle_type_mismatch+0x43/0x60 [ 1202.086385] tcp_sacktag_write_queue+0x27a7/0x2fd0 [ 1202.086386] ? vprintk_emit+0xfc/0x330 [ 1202.086388] tcp_ack+0xb66/0x2970 [ 1202.086390] tcp_rcv_established+0x367/0x1350 [ 1202.086392] tcp_v4_do_rcv+0x119/0x630 [ 1202.086393] tcp_v4_rcv+0x1dec/0x2170 [ 1202.086395] ip_local_deliver_finish+0x106/0x6a0 [ 1202.086396] ip_local_deliver+0xc4/0x1c0 [ 1202.086398] ? ip_sublist_rcv+0x7f0/0x7f0 [ 1202.086399] ip_rcv+0x7b/0x100 [ 1202.086400] ? nf_hook.constprop.9+0x2f0/0x2f0 [ 1202.086401] ? ip_local_deliver+0x1c0/0x1c0 [ 1202.086402] __netif_receive_skb_one_core+0x6b/0xd0 [ 1202.086404] ? swiotlb_sync_single_for_cpu+0x10/0x10 [ 1202.086405] netif_receive_skb_internal+0x42/0x180 [ 1202.086406] napi_gro_receive+0x13e/0x1d0 [ 1202.086408] ? swiotlb_sync_single_for_cpu+0x10/0x10 [ 1202.086410] rtl8169_poll+0x3a2/0x1630 [r8169] [ 1202.086412] net_rx_action+0x39b/0x11d0 [ 1202.086414] __do_softirq+0x1ee/0x86e [ 1202.086416] irq_exit+0xae/0x110 [ 1202.086417] do_IRQ+0xa1/0x150 [ 1202.086418] common_interrupt+0xf/0xf [ 1202.086419] </IRQ> [ 1202.086420] RIP: 0010:cpuidle_enter_state+0x116/0x650 [ 1202.086421] Code: 48 c7 44 24 18 00 00 00 00 0f 1f 44 00 00 31 ff e8 9f 82 ba fe 45 84 ff 0f 85 5d 02 00 00 e8 61 2d d6 fe fb 66 0f 1f 44 00 00 <4c> 8b 2c 24 4d 29 f5 0f 80 fa 02 00 00 4c 89 e8 48 ba cf f7 53 e3 [ 1202.086422] RSP: 0018:ffffb716000d7e48 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd9 [ 1202.086423] RAX: 0000000000000000 RBX: ffffd715ffd08a00 RCX: 000000000000001f [ 1202.086423] RDX: 0000000000000096 RSI: 000000003161f9ae RDI: 0000000000000000 [ 1202.086424] RBP: ffffffff96b9b3d8 R08: 0000000000000000 R09: 0000000000000000 [ 1202.086425] R10: ffffb716000d7e08 R11: 0000000000000425 R12: 0000000000000007 [ 1202.086425] R13: 0000000000000004 R14: 00000117e1d26493 R15: 0000000000000000 [ 1202.086427] ? cpuidle_enter_state+0x10f/0x650 [ 1202.086428] do_idle+0x1ec/0x2c0 [ 1202.086429] cpu_startup_entry+0x77/0x90 [ 1202.086431] start_secondary+0x206/0x2e0 [ 1202.086432] secondary_startup_64+0xb6/0xc0 [ 1202.086433] ================================================================================ [ 1202.086434] ================================================================================ [ 1202.086434] UBSAN: Undefined behaviour in ./include/uapi/linux/swab.h:179:9 [ 1202.086435] load of misaligned address 0000000023eea967 for type 'const __u32' [ 1202.086435] which requires 4 byte alignment [ 1202.086436] CPU: 4 PID: 0 Comm: swapper/4 Tainted: P O T 4.19.8-gentoo #4 [ 1202.086437] Hardware name: ASUSTeK COMPUTER INC. G752VY/G752VY, BIOS G752VY.304 06/29/2017 [ 1202.086437] Call Trace: [ 1202.086438] <IRQ> [ 1202.086439] dump_stack+0xa1/0x11b [ 1202.086441] ubsan_epilogue+0x9/0x40 [ 1202.086442] ubsan_type_mismatch_common+0x17b/0x190 [ 1202.086444] __ubsan_handle_type_mismatch+0x43/0x60 [ 1202.086445] tcp_sacktag_write_queue+0x2c62/0x2fd0 [ 1202.086447] tcp_ack+0xb66/0x2970 [ 1202.086449] tcp_rcv_established+0x367/0x1350 [ 1202.086450] tcp_v4_do_rcv+0x119/0x630 [ 1202.086452] tcp_v4_rcv+0x1dec/0x2170 [ 1202.086454] ip_local_deliver_finish+0x106/0x6a0 [ 1202.086455] ip_local_deliver+0xc4/0x1c0 [ 1202.086456] ? ip_sublist_rcv+0x7f0/0x7f0 [ 1202.086458] ip_rcv+0x7b/0x100 [ 1202.086459] ? nf_hook.constprop.9+0x2f0/0x2f0 [ 1202.086460] ? ip_local_deliver+0x1c0/0x1c0 [ 1202.086461] __netif_receive_skb_one_core+0x6b/0xd0 [ 1202.086463] ? swiotlb_sync_single_for_cpu+0x10/0x10 [ 1202.086464] netif_receive_skb_internal+0x42/0x180 [ 1202.086465] napi_gro_receive+0x13e/0x1d0 [ 1202.086467] ? swiotlb_sync_single_for_cpu+0x10/0x10 [ 1202.086469] rtl8169_poll+0x3a2/0x1630 [r8169] [ 1202.086470] net_rx_action+0x39b/0x11d0 [ 1202.086472] __do_softirq+0x1ee/0x86e [ 1202.086474] irq_exit+0xae/0x110 [ 1202.086475] do_IRQ+0xa1/0x150 [ 1202.086477] common_interrupt+0xf/0xf [ 1202.086477] </IRQ> [ 1202.086479] RIP: 0010:cpuidle_enter_state+0x116/0x650 [ 1202.086479] Code: 48 c7 44 24 18 00 00 00 00 0f 1f 44 00 00 31 ff e8 9f 82 ba fe 45 84 ff 0f 85 5d 02 00 00 e8 61 2d d6 fe fb 66 0f 1f 44 00 00 <4c> 8b 2c 24 4d 29 f5 0f 80 fa 02 00 00 4c 89 e8 48 ba cf f7 53 e3 [ 1202.086480] RSP: 0018:ffffb716000d7e48 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd9 [ 1202.086481] RAX: 0000000000000000 RBX: ffffd715ffd08a00 RCX: 000000000000001f [ 1202.086482] RDX: 0000000000000096 RSI: 000000003161f9ae RDI: 0000000000000000 [ 1202.086482] RBP: ffffffff96b9b3d8 R08: 0000000000000000 R09: 0000000000000000 [ 1202.086483] R10: ffffb716000d7e08 R11: 0000000000000425 R12: 0000000000000007 [ 1202.086483] R13: 0000000000000004 R14: 00000117e1d26493 R15: 0000000000000000 [ 1202.086485] ? cpuidle_enter_state+0x10f/0x650 [ 1202.086486] do_idle+0x1ec/0x2c0 [ 1202.086487] cpu_startup_entry+0x77/0x90 [ 1202.086489] start_secondary+0x206/0x2e0 [ 1202.086490] secondary_startup_64+0xb6/0xc0 [ 1202.086491] ================================================================================
System info: Portage 2.3.51 (python 3.6.5-final-0, hardened/linux/amd64, gcc-7.3.0, glibc-2.27-r6, 4.19.8-gentoo x86_64) ================================================================= System uname: Linux-4.19.8-gentoo-x86_64-Intel-R-_Core-TM-_i7-6700HQ_CPU_@_2.60GHz-with-gentoo-2.6 KiB Mem: 40976340 total, 16220132 free KiB Swap: 0 total, 0 free Timestamp of repository gentoo: Thu, 13 Dec 2018 12:15:01 +0000 Head commit of repository gentoo: 057645ffcdb86bd24e7c965f6e1aa03db33abb4c sh bash 4.4_p12 ld GNU ld (Gentoo 2.30 p5) 2.30.0 app-shells/bash: 4.4_p12::gentoo dev-java/java-config: 2.2.0-r4::gentoo dev-lang/perl: 5.26.2::gentoo dev-lang/python: 2.7.15::gentoo, 3.4.8::gentoo, 3.5.5::gentoo, 3.6.5::gentoo dev-util/cmake: 3.12.3::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.6-r1::gentoo sys-apps/openrc: 0.38.3-r1::gentoo sys-apps/sandbox: 2.13::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r4::gentoo sys-devel/automake: 1.11.6-r3::gentoo, 1.12.6::gentoo, 1.13.4-r2::gentoo, 1.14.1::gentoo, 1.15.1-r2::gentoo sys-devel/binutils: 2.30-r4::gentoo sys-devel/gcc: 7.3.0-r3::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r3::gentoo sys-devel/make: 4.2.1-r4::gentoo sys-kernel/linux-headers: 4.13::gentoo (virtual/os-headers) sys-libs/glibc: 2.27-r6::gentoo
Detection of undefined behavior via the UndefinedBehaviorSanitizer can be reported upstream at https://bugzilla.kernel.org
