While running selftests: net: udpgso_bench.sh on qemu-x86_64 the following kernel crash noticed on stable rc 6.3.4-rc2 kernel.

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

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 rx: 231 MB/s 3668 calls/s # tcp tx: 225 MB/s 3817 calls/s 3817 msg/s # tcp rx: 225 MB/s 3525 calls/s # tcp tx: 225 MB/s 3820 calls/s 3820 msg/s # tcp zerocopy # tcp tx: 198 MB/s 3369 calls/s 3369 msg/s # tcp rx: 197 MB/s 2855 calls/s # tcp tx: 195 MB/s 3318 calls/s 3318 msg/s # tcp rx: 197 MB/s 2845 calls/s # udp # udp rx: 8 MB/s 5811 calls/s # udp tx: 11 MB/s 7938 calls/s 189 msg/s # udp rx: 10 MB/s 7523 calls/s # udp tx: 10 MB/s 7308 calls/s 174 msg/s # udp rx: 10 MB/s 7338 calls/s # udp gso # udp rx: 19 MB/s 14080 calls/s # udp tx: 118 MB/s 2012 calls/s 2012 msg/s # udp rx: 26 MB/s 18688 calls/s # udp tx: 117 MB/s 2000 calls/s 2000 msg/s # udp rx: 26 MB/s 18688 calls/s # udp tx: 118 MB/s 2008 calls/s 2008 msg/s # udp gso zerocopy # udp rx: 19 MB/s 13824 calls/s # udp tx: 102 MB/s 1736 calls/s 1736 msg/s # udp rx: 25 MB/s 18176 calls/s # udp tx: 101 MB/s 1714 calls/s 1714 msg/s # udp rx: 25 MB/s 18176 calls/s # udp tx: 98 MB/s 1679 calls/s 1679 msg/s # udp gso timestamp # udp rx: 19 MB/s 13824 calls/s # udp tx: 94 MB/s 1606 calls/s 1606 msg/s # udp rx: 25 MB/s 18432 calls/s # udp tx: 92 MB/s 1574 calls/s 1574 msg/s # udp rx: 27 MB/s 19309 calls/s # udp tx: 88 MB/s 1502 calls/s 1502 msg/s # udp gso zerocopy audit # udp rx: 19 MB/s 14080 calls/s # udp tx: 101 MB/s 1728 calls/s 1728 msg/s # udp rx: 25 MB/s 18432 calls/s # udp tx: 100 MB/s 1699 calls/s 1699 msg/s # udp rx: 26 MB/s 18688 calls/s # udp tx: 101 MB/s 1724 calls/s 1724 msg/s # Summary over 3.000 seconds... # sum udp tx: 103 MB/s 5151 calls (1717/s) 5151 msgs (1717/s) # Zerocopy acks: 5151 # udp gso timestamp audit # udp rx: 19 MB/s 13843 calls/s # udp tx: 92 MB/s 1571 calls/s 1571 msg/s # udp rx: 26 MB/s 18568 calls/s # udp tx: 95 MB/s 1614 calls/s 1614 msg/s # udp rx: 26 MB/s 19200 calls/s # udp tx: 93 MB/s 1589 calls/s 1589 msg/s # Summary over 3.000 seconds... # sum udp tx: 96 MB/s 4774 calls (1591/s) 4774 msgs (1591/s) # Tx Timestamps: 4774 received 0 errors # udp gso zerocopy timestamp audit # udp rx: 18 MB/s 13312 calls/s # udp tx: 76 MB/s 1297 calls/s 1297 msg/s # udp rx: 26 MB/s 18524 calls/s # udp tx: 74 MB/s 1269 calls/s 1269 msg/s # udp rx: 25 MB/s 18176 calls/s # udp tx: 75 MB/s 1289 calls/s 1289 msg/s # Summary over 3.000 seconds... # sum udp tx: 77 MB/s 3855 calls (1285/s) 3855 msgs (1285/s) # Tx Timestamps: 3855 received 0 errors # Zerocopy acks: 3855 # ipv6 # tcp # tcp tx: 215 MB/s 3657 calls/s 3657 msg/s # tcp rx: 216 MB/s 3431 calls/s # tcp tx: 211 MB/s 3590 calls/s 3590 msg/s # tcp rx: 211 MB/s 3319 calls/s # tcp tx: 211 MB/s 3579 calls/s 3579 msg/s # tcp zerocopy # tcp tx: 191 MB/s 3245 calls/s 3245 msg/s # tcp rx: 193 MB/s 2908 calls/s # tcp tx: 184 MB/s 3135 calls/s 3135 msg/s # tcp rx: 185 MB/s 2830 calls/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)

log: ==== - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2QCexh5uf81... - https://storage.tuxsuite.com/public/linaro/lkft/builds/2QCeuW0pJ8XVzYeG3rpgz... - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.3.y/build/v6.3.3-...

-- Linaro LKFT https://lkft.linaro.org