From: Jakub Kicinski <kuba@xxxxxxxxxx> Date: Fri, 26 May 2023 20:16:07 -0700 > On Wed, 24 May 2023 13:24:15 +0530 Naresh Kamboju wrote: > > While running selftests: net: udpgso_bench.sh on qemu-x86_64 the following > > kernel crash noticed on stable rc 6.3.4-rc2 kernel. > > Can you repro this or it's just a one-off? > > Adding some experts to CC. FWIW, I couldn't reproduce it on my x86_64 QEMU setup & 6.4.0-rc3 at least 5 times, so maybe one-off ? ---8<--- [root@localhost ~]# ./udpgso_bench.sh ... udpgso_bench.sh: PASS=18 SKIP=0 FAIL=0 udpgso_bench.sh: PASS ---8<--- And it seems the vmlinux does not have debuginfo... https://storage.tuxsuite.com/public/linaro/lkft/builds/2QCeuW0pJ8XVzYeG3rpgza2cZDW/ ---8<--- $ echo lookup_reuseport+0x4a/0x200 | ../net-next/scripts/decode_stacktrace.sh vmlinux lookup_reuseport (udp.c:?) ---8<--- > > > Test run log: > > ========= > > > > <12>[ 38.049122] kselftest: Running tests in net > > TAP version 13 > > 1..16 > > # selftests: net: udpgso_bench.sh > > # ipv4 > > # tcp > > # tcp tx: 230 MB/s 3905 calls/s 3905 msg/s > [...] > > # tcp tx: 191 MB/s 3254 calls/s 3254 msg/s > > # udp > > <4>[ 88.821235] int3: 0000 [#1] PREEMPT SMP PTI > > <4>[ 88.821491] CPU: 1 PID: 561 Comm: udpgso_bench_tx Not tainted 6.3.4-rc2 #1 > > <4>[ 88.821576] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), > > BIOS 1.14.0-2 04/01/2014 > > <4>[ 88.821685] RIP: 0010:lookup_reuseport+0x4a/0x200 > > <4>[ 88.822122] Code: 74 0b 49 89 f6 0f b6 46 12 3c 01 75 07 31 c0 > > e9 ed 00 00 00 4d 89 cf 44 89 c5 49 89 cd 49 89 fc 0f 1f 44 00 00 8b > > 5c 24 50 0f <1f> 44 00 00 41 8b 45 04 41 33 45 00 8b 0d b0 c5 ed 00 44 > > 8d 04 08 > > <4>[ 88.822175] RSP: 0018:ffffa95c800c0b90 EFLAGS: 00000206 > > <4>[ 88.822215] RAX: 0000000000000007 RBX: 0000000000001f40 RCX: > > ffff966c02b66020 > > <4>[ 88.822228] RDX: ffff966c01a9aa00 RSI: ffff966c02801500 RDI: > > ffff966c03ae2e80 > > <4>[ 88.822241] RBP: 00000000000093bf R08: 00000000000093bf R09: > > ffffffffb0b2c8a0 > > <4>[ 88.822254] R10: 0000000042388386 R11: 00000000000093bf R12: > > ffff966c03ae2e80 > > <4>[ 88.822266] R13: ffff966c02b66020 R14: ffff966c02801500 R15: > > ffffffffb0b2c8a0 > > <4>[ 88.822312] FS: 00007f4e6ede4740(0000) > > GS:ffff966c7bd00000(0000) knlGS:0000000000000000 > > <4>[ 88.822330] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > <4>[ 88.822343] CR2: 000055a1c0b90bf0 CR3: 0000000103b0e000 CR4: > > 00000000000006e0 > > <4>[ 88.822438] Call Trace: > > <4>[ 88.823080] <IRQ> > > <4>[ 88.823274] udp6_lib_lookup2+0xf8/0x1c0 > > <4>[ 88.823368] __udp6_lib_lookup+0x113/0x3c0 > > <4>[ 88.823382] ? __wake_up_common_lock+0x79/0x190 > > <4>[ 88.823403] __udp6_lib_lookup_skb+0x76/0x90 > > <4>[ 88.823426] __udp6_lib_rcv+0x295/0x400 > > <4>[ 88.823440] ip6_protocol_deliver_rcu+0x34e/0x5c0 > > <4>[ 88.823483] ip6_input+0x60/0x110 > > <4>[ 88.823496] ? ip6_rcv_core+0x311/0x450 > > <4>[ 88.823509] ipv6_rcv+0x47/0xf0 > > <4>[ 88.823523] __netif_receive_skb+0x65/0x170 > > <4>[ 88.823539] process_backlog+0xd7/0x180 > > <4>[ 88.823553] __napi_poll+0x2c/0x1b0 > > <4>[ 88.823565] net_rx_action+0x178/0x2e0 > > <4>[ 88.823580] __do_softirq+0xc4/0x274 > > <4>[ 88.823595] do_softirq+0x7e/0xb0 > > <4>[ 88.823751] </IRQ> > > <4>[ 88.823769] <TASK> > > <4>[ 88.823773] __local_bh_enable_ip+0x6e/0x70 > > <4>[ 88.823786] ip6_finish_output2+0x3fc/0x560 > > <4>[ 88.823803] ip6_finish_output+0x1ab/0x320 > > <4>[ 88.823816] ip6_output+0x6b/0x130 > > <4>[ 88.823827] ? __pfx_ip6_finish_output+0x10/0x10 > > <4>[ 88.823839] ip6_send_skb+0x1e/0x80 > > <4>[ 88.823850] udp_v6_send_skb+0x26e/0x400 > > <4>[ 88.823865] udpv6_sendmsg+0xb33/0xc60 > > <4>[ 88.823879] ? __pfx_ip_generic_getfrag+0x10/0x10 > > <4>[ 88.823902] sock_sendmsg+0x42/0xa0 > > <4>[ 88.823915] __sys_sendto+0x281/0x2f0 > > <4>[ 88.823938] __x64_sys_sendto+0x21/0x30 > > <4>[ 88.823949] do_syscall_64+0x48/0xa0 > > <4>[ 88.823969] ? exit_to_user_mode_prepare+0x2a/0x80 > > <4>[ 88.823981] entry_SYSCALL_64_after_hwframe+0x72/0xdc > > <4>[ 88.824104] RIP: 0033:0x7f4e6eef1973 > > <4>[ 88.824267] Code: 8b 15 91 74 0c 00 f7 d8 64 89 02 48 c7 c0 ff > > ff ff ff eb b8 0f 1f 00 80 3d 71 fc 0c 00 00 41 89 ca 74 14 b8 2c 00 > > 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 55 48 83 ec 30 44 > > 89 4c 24 > > <4>[ 88.824276] RSP: 002b:00007ffc3a3d79f8 EFLAGS: 00000202 > > ORIG_RAX: 000000000000002c > > <4>[ 88.824293] RAX: ffffffffffffffda RBX: 00005596927cf110 RCX: > > 00007f4e6eef1973 > > <4>[ 88.824298] RDX: 00000000000005ac RSI: 00005596927cf110 RDI: > > 0000000000000005 > > <4>[ 88.824304] RBP: 0000000000000000 R08: 0000000000000000 R09: > > 0000000000000000 > > <4>[ 88.824309] R10: 0000000000000000 R11: 0000000000000202 R12: > > 0000000000000002 > > <4>[ 88.824313] R13: 0000000000000005 R14: 000000000000e628 R15: > > 00000000000005ac > > <4>[ 88.824335] </TASK> > > <4>[ 88.824377] Modules linked in: mptcp_diag tcp_diag inet_diag > > ip_tables x_tables > > <4>[ 88.845108] ---[ end trace 0000000000000000 ]--- > > <4>[ 88.845178] RIP: 0010:lookup_reuseport+0x4a/0x200 > > <4>[ 88.845216] Code: 74 0b 49 89 f6 0f b6 46 12 3c 01 75 07 31 c0 > > e9 ed 00 00 00 4d 89 cf 44 89 c5 49 89 cd 49 89 fc 0f 1f 44 00 00 8b > > 5c 24 50 0f <1f> 44 00 00 41 8b 45 04 41 33 45 00 8b 0d b0 c5 ed 00 44 > > 8d 04 08 > > <4>[ 88.845232] RSP: 0018:ffffa95c800c0b90 EFLAGS: 00000206 > > <4>[ 88.845249] RAX: 0000000000000007 RBX: 0000000000001f40 RCX: > > ffff966c02b66020 > > <4>[ 88.845257] RDX: ffff966c01a9aa00 RSI: ffff966c02801500 RDI: > > ffff966c03ae2e80 > > <4>[ 88.845266] RBP: 00000000000093bf R08: 00000000000093bf R09: > > ffffffffb0b2c8a0 > > <4>[ 88.845273] R10: 0000000042388386 R11: 00000000000093bf R12: > > ffff966c03ae2e80 > > <4>[ 88.845281] R13: ffff966c02b66020 R14: ffff966c02801500 R15: > > ffffffffb0b2c8a0 > > <4>[ 88.845290] FS: 00007f4e6ede4740(0000) > > GS:ffff966c7bd00000(0000) knlGS:0000000000000000 > > <4>[ 88.845302] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > <4>[ 88.845311] CR2: 000055a1c0b90bf0 CR3: 0000000103b0e000 CR4: > > 00000000000006e0 > > <0>[ 88.845862] Kernel panic - not syncing: Fatal exception in interrupt > > <0>[ 88.848258] Kernel Offset: 0x2e800000 from 0xffffffff81000000 > > (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
