[缺陷描述]： ltp：ftrace-stress-test 触发kernel softlockup，系统卡主，串口有异常信息打印 串口日志具体如下： [71643.477048] watchdog: BUG: soft lockup - CPU#0 stuck for 112s! [sh:2296076] [71647.861429] Modules linked in: isofs tun fuse n_gsm pps_ldisc ppp_synctty ppp_async ppp_generic slcan slip slhc n_hdlc pcrypt crypto_user authenc vmac poly1305_generic libpoly1305 poly1305_x86_64 chacha_generic chacha_x86_64 libchacha chacha20poly1305 salsa20_generic sha3_generic dummy veth msdos vfat fat xfs libcrc32c loop sr_mod cdrom sd_mod t10_pi sg tcp_diag udp_diag inet_diag binfmt_misc rfkill mousedev intel_rapl_msr intel_rapl_common isst_if_common nfit crct10dif_pclmul crc32_pclmul ghash_clmulni_intel psmouse pcspkr i2c_piix4 nfsd auth_rpcgss nfs_acl lockd grace sunrpc cirrus drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm virtio_net crc32c_intel serio_raw ata_generic net_failover i2c_core failover ata_piix libata [last unloaded: ltp_insmod01] [71647.897322] irq event stamp: 0 [71647.901215] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [71647.905731] hardirqs last disabled at (0): [<ffffffff861df063>] copy_process+0x1373/0x4a40 [71647.910640] softirqs last enabled at (0): [<ffffffff861df09f>] copy_process+0x13af/0x4a40 [71647.915612] softirqs last disabled at (0): [<0000000000000000>] 0x0 [71647.920291] CPU: 0 PID: 2296076 Comm: sh Kdump: loaded Tainted: G W OE 5.10.134-832.git.058854d6c99d.al8.x86_64+debug #1 [71647.929422] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 8c24b4c 04/01/2014 [71647.951406] Modules linked in: [71647.970042] RIP: 0010:smp_call_function_many_cond+0x60e/0x920 [71647.978965] Code: 38 d0 7c 08 84 d2 0f 85 29 01 00 00 8b 43 08 a8 01 74 2a 48 89 ca 49 89 ce 48 c1 ea 03 41 83 e6 07 4c 01 fa 41 83 c6 03 f3 90 <0f> b6 02 41 38 c6 7c 04 84 c0 75 59 8b 43 08 a8 01 75 eb e9 3e ff [71647.990279] RSP: 0018:ffff888126f87b68 EFLAGS: 00000202 [71647.995382] RAX: 0000000000000011 RBX: ffffe8ffff21ab80 RCX: ffffe8ffff21ab88 [71648.034439] RDX: fffff91fffe43571 RSI: 0000000000000000 RDI: ffffffff8906aae8 [71648.034450] RBP: ffffed107b8c0fb1 R08: 0000000000000000 R09: 0000000000000001 [71648.034473] R10: fffffbfff153895c R11: 0000000000000001 R12: ffff8883dc607d80 [71648.034483] R13: ffffed107b8c0fb0 R14: 0000000000000003 R15: dffffc0000000000 [71648.034499] FS: 00007f1b294a2740(0000) GS:ffff8883dc400000(0000) knlGS:0000000000000000 [71648.034513] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [71648.034523] CR2: 00007f3df5891420 CR3: 00000001814a4005 CR4: 00000000003706f0 [71648.034532] DR0: 0000000000000001 DR1: 0000000000000000 DR2: 0000000000000000 [71648.034542] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 [71648.034551] Call Trace: [71648.034593] ? __text_poke+0xba0/0xba0 [71648.034641] ? __text_poke+0xba0/0xba0 [71648.034684] on_each_cpu+0x39/0x80 [71648.034714] text_poke_bp_batch+0x1a6/0x4d0 [71648.034748] ? jump_label_transform+0x130/0x130 [71648.034770] ? alternatives_enable_smp+0x70/0x70 [71648.034820] ? ftrace_graph_caller+0x6b/0xa0 [71648.096260] text_poke_flush+0x8c/0xc0 [71648.096282] ? rcu_report_qs_rnp+0x310/0x310 [71648.096302] text_poke_queue+0x55/0xd0 [71648.096345] ftrace_replace_code+0x1c1/0x2e0 [71648.096401] ftrace_modify_all_code+0xc1/0x160 [71648.096431] ftrace_run_update_code+0x13/0x70 [71648.096448] ftrace_shutdown.part.0+0x35b/0x6f0 [71648.096474] ? remove_ftrace_ops.constprop.0+0x139/0x230 [71648.096485] ? ftrace_epilogue+0x10/0x10 [71648.096500] ? update_ftrace_function+0xb0/0x210 [71648.096566] unregister_ftrace_graph+0x53/0x80 [71648.096578] ftrace_profile_write+0x120/0x140 [71648.096601] ? ftrace_profile_init+0x340/0x340 [71648.096660] vfs_write+0x1cd/0x860 [71648.096718] ksys_write+0xe9/0x1b0 [71648.096742] ? __ia32_sys_read+0xb0/0xb0 [71648.096774] ? rcu_read_lock_sched_held+0x12/0x80 [71648.096826] do_syscall_64+0x30/0x40 [71648.096846] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [71648.096861] RIP: 0033:0x7f1b295974a7 [71648.096876] Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24 [71648.096887] RSP: 002b:00007ffd02268458 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [71648.096909] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1b295974a7 [71648.096919] RDX: 0000000000000002 RSI: 00005560a7503f60 RDI: 0000000000000001 [71648.096928] RBP: 00005560a7503f60 R08: 000000000000000a R09: 00007f1b2962e0c0 [71648.096937] R10: 00007f1b2962dfc0 R11: 0000000000000246 R12: 0000000000000002 [71648.096946] R13: 00007f1b2966b520 R14: 0000000000000002 R15: 00007f1b2966b720 [71665.439688] watchdog: BUG: soft lockup - CPU#2 stuck for 111s! [nscd:660] [71670.491721] isofs [71693.509225] Modules linked in: [71716.887592] tun [71739.733711] isofs [71761.631413] fuse [71783.242653] tun [71783.471485] watchdog: BUG: soft lockup - CPU#0 stuck for 112s! [sh:2296076] [71783.471496] Modules linked in: isofs tun fuse n_gsm pps_ldisc ppp_synctty ppp_async ppp_generic slcan slip slhc n_hdlc pcrypt crypto_user authenc vmac poly1305_generic libpoly1305 poly1305_x86_64 chacha_generic chacha_x86_64 libchacha chacha20poly1305 salsa20_generic sha3_generic dummy veth msdos vfat fat xfs libcrc32c loop sr_mod cdrom sd_mod t10_pi sg tcp_diag udp_diag inet_diag binfmt_misc rfkill mousedev intel_rapl_msr intel_rapl_common isst_if_common nfit crct10dif_pclmul crc32_pclmul ghash_clmulni_intel psmouse pcspkr i2c_piix4 nfsd auth_rpcgss nfs_acl lockd grace sunrpc cirrus drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm virtio_net crc32c_intel serio_raw ata_generic net_failover i2c_core failover ata_piix libata [last unloaded: ltp_insmod01] [71783.472155] irq event stamp: 0 [71783.472169] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [71783.472183] hardirqs last disabled at (0): [<ffffffff861df063>] copy_process+0x1373/0x4a40 [71783.472194] softirqs last enabled at (0): [<ffffffff861df09f>] copy_process+0x13af/0x4a40 [71783.472205] softirqs last disabled at (0): [<0000000000000000>] 0x0 [71783.472218] CPU: 0 PID: 2296076 Comm: sh Kdump: loaded Tainted: G W OEL 5.10.134-832.git.058854d6c99d.al8.x86_64+debug #1 [71783.472227] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 8c24b4c 04/01/2014 [71783.472239] RIP: 0010:smp_call_function_many_cond+0x60e/0x920 [71783.472253] Code: 38 d0 7c 08 84 d2 0f 85 29 01 00 00 8b 43 08 a8 01 74 2a 48 89 ca 49 89 ce 48 c1 ea 03 41 83 e6 07 4c 01 fa 41 83 c6 03 f3 90 <0f> b6 02 41 38 c6 7c 04 84 c0 75 59 8b 43 08 a8 01 75 eb e9 3e ff [71783.472263] RSP: 0018:ffff888126f87b68 EFLAGS: 00000202 [71783.472283] RAX: 0000000000000011 RBX: ffffe8ffff21ab80 RCX: ffffe8ffff21ab88 [71783.472293] RDX: fffff91fffe43571 RSI: 0000000000000000 RDI: ffffffff8906aae8 [71783.472301] RBP: ffffed107b8c0fb1 R08: 0000000000000000 R09: 0000000000000001 [71783.472310] R10: fffffbfff153895c R11: 0000000000000001 R12: ffff8883dc607d80 [71783.472318] R13: ffffed107b8c0fb0 R14: 0000000000000003 R15: dffffc0000000000 [71783.472330] FS: 00007f1b294a2740(0000) GS:ffff8883dc400000(0000) knlGS:0000000000000000 [71783.472342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [71783.472350] CR2: 00007f3df5891420 CR3: 00000001814a4005 CR4: 00000000003706f0 [71783.472358] DR0: 0000000000000001 DR1: 0000000000000000 DR2: 0000000000000000 [重现概率] 必现 [测试步骤] git clone http://gitlab.alibaba-inc.com/alikernel/ltp.git --branch LTP-20200930 cd ltp make autotools ./configure make make install export PATH=$PATH:/opt/ltp/testcases/bin ./runltp -f tracing -s ftrace-stress-test [测试环境] 内核： 5.10.134-833.git.058854d6c99d.al8.x86_64+debug # cat /etc/os-release NAME="Alibaba Cloud Linux" VERSION="3 (Soaring Falcon)" ID="alinux" ID_LIKE="rhel fedora centos anolis" VERSION_ID="3" PLATFORM_ID="platform:al8" PRETTY_NAME="Alibaba Cloud Linux 3 (Soaring Falcon)" ANSI_COLOR="0;31" HOME_URL="https://www.aliyun.com/" CPU信息： # lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per core: 2 Core(s) per socket: 1 Socket(s): 2 NUMA node(s): 1 Vendor ID: GenuineIntel BIOS Vendor ID: Alibaba Cloud CPU family: 6 Model: 85 Model name: Intel(R) Xeon(R) Platinum 8269CY CPU @ 2.50GHz BIOS Model name: pc-i440fx-2.1 Stepping: 7 CPU MHz: 2499.998 BogoMIPS: 4999.99 Hypervisor vendor: KVM Virtualization type: full L1d cache: 32K L1i cache: 32K L2 cache: 1024K L3 cache: 36608K NUMA node0 CPU(s): 0-3 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl cpuid tsc_known_freq pni pclmulqdq monitor ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves avx512_vnni 内存： # free -h total used free shared buff/cache available Mem: 12Gi 1.1Gi 10Gi 2.0Mi 987Mi 11Gi Swap: 0B 0B 0B [预期结果]： 用例执行成功 [实际结果]： 用例运行过程中，系统发生soft lockup