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我们的客户在利用我们提供的SDK参考方案开发相关产品时#xff0c;在产品方案上进行一些基础老化测试时#xff0c;极低概率出现kernel随机panic问题#xff0c;由于场景复杂#xff0c;无法单独针对特定模块或功能进行拆解来进行实验排查#xff0c;只能基于已…背景介绍
我们的客户在利用我们提供的SDK参考方案开发相关产品时在产品方案上进行一些基础老化测试时极低概率出现kernel随机panic问题由于场景复杂无法单独针对特定模块或功能进行拆解来进行实验排查只能基于已有的log和复现抓kdump进行相关分析和定位。本文记录相关分析过程以作后续参考和学习
问题log分析
首次抓到现场的关键log如下所示
[ 153.081557] Unable to handle kernel paging request at virtual address 1800180018000
[ 153.089255] Mem abort info:
[ 153.092058] Exception class DABT (current EL), IL 32 bits
[ 153.097997] SET 0, FnV 0
[ 153.101068] EA 0, S1PTW 0
[ 153.104208] Data abort info:
[ 153.107098] ISV 0, ISS 0x00000004
[ 153.110938] CM 0, WnR 0
[ 153.113916] [0001800180018000] address between user and kernel address ranges
[ 153.121058] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[ 153.126630] Modules linked in: bcmdhd hci_uart bluetooth ecdh_generic crypto_engine pvrsrvkm
[ 153.135082] CPU: 3 PID: 2723 Comm: MessageThread Tainted: G O 4.14.61-00009-gc2eae318e529-dirty #14
[ 153.151001] task: ffff800178125400 task.stack: ffff00000ad78000
[ 153.156928] PC is at test_and_set_bit0x18/0x38
[ 153.161461] LR is at zs_page_migrate0x104/0x560
[ 153.166077] pc : [ffff000008cf69a8] lr : [ffff00000828c814] pstate: 40400145
[ 153.173471] sp : ffff00000ad7b610
[ 153.176784] x29: ffff00000ad7b6a0 x28: ffff8000eb502060
[ 153.182096] x27: 00000000000008e0 x26: ffff80005d715000
[ 153.187409] x25: ffff800178125400 x24: ffff8000eb502088
[ 153.192721] x23: ffff7e000175c550 x22: ffff7e0004615680
[ 153.198033] x21: ffff7e000175c540 x20: ffff800158629b00
[ 153.203345] x19: 00000000000008e0 x18: 0000000000000000
[ 153.208657] x17: 0000000000000001 x16: ffff80017ff16b00
[ 153.213969] x15: 0001182270000000 x14: ffff0000091d2018
[ 153.219280] x13: 00000000000000c1 x12: 0000000000000000
[ 153.224592] x11: 0000000000000140 x10: 0000000000000000
[ 153.229904] x9 : 0000000000000005 x8 : 8001800180018001
[ 153.235215] x7 : 8000800080008000 x6 : ffff8000d8228000
[ 153.240527] x5 : 0000000000000000 x4 : 0000000000000001
[ 153.245839] x3 : 0000000000000000 x2 : 0000000000000001
[ 153.251150] x1 : 8001800180018000 x0 : 0000000000000000
[ 153.256465]
[ 153.256465] X6: 0xffff8000d8227f80:
[ 153.261428] 7f80 331c2a00 01200207 580e2a00 1120020c 80000000 80008000 80008000 80008000
[ 153.269614] 7fa0 80008000 80008000 80008000 80008000 80008000 80008000 80008000 80008000
[ 153.277797] 7fc0 80008000 80008000 80008000 80008000 80008000 80008000 80008000 80008000
[ 153.285982] 7fe0 80008000 80008000 80008000 80008000 80008000 80008000 80008000 80008000
[ 153.294166] 8000 e2c56740 0000e7c5 f804ae40 0000e7c5 0000000f 00000000 00000000 00000000
[ 153.302351] 8020 00000000 00000000 00000000 408f4000 00000008 00000000 7375732a 646e6570
[ 153.310535] 8040 6c6c6120 73696820 72676f74 00006d61 00000040 00000000 00000008 00000000
[ 153.318719] 8060 00000010 00000000 e3e91c00 0000e7c5 e3e91c84 0000e7c5 e3e91d00 0000e7c5
[ 153.326906]
[ 153.326906] X16: 0xffff80017ff16a80:
[ 153.331956] 6a80 00000001 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.340139] 6aa0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.348323] 6ac0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.356507] 6ae0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.364690] 6b00 0481b7e0 ffff7e00 03801ae0 ffff7e00 0357f8e0 ffff7e00 0357f8e0 ffff7e00
[ 153.372875] 6b20 03b9fc60 ffff7e00 037034a0 ffff7e00 7ff16b30 ffff8001 7ff16b30 ffff8001
[ 153.381059] 6b40 7ff16b40 ffff8001 7ff16b40 ffff8001 7ff16b50 ffff8001 7ff16b50 ffff8001
[ 153.389243] 6b60 0000003c 00000000 03801a20 ffff7e00 03804520 ffff7e00 041091a0 ffff7e00
[ 153.397428]
[ 153.397428] X20: 0xffff800158629a80:
[ 153.402477] 9a80 000008ab 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.410660] 9aa0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.418843] 9ac0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.425337] saf775x saf775d_ioctl The process is Binder:3409_2 (pid 3456)
[ 153.425340] radio cmd:SAF775D_RADIO_GETLEVEL
[ 153.425928] lllevel -7
[ 153.440955] 9ae0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.449138] 9b00 054c054a 00000000 58629b08 ffff8001 58629b08 ffff8001 20753e28 ffff8001
[ 153.457322] 9b20 234698e8 ffff8000 01499a68 ffff8001 cd9bb408 ffff8000 236ba9a8 ffff8000
[ 153.465507] 9b40 4d7b3e58 ffff8000 000006d0 00000007 00000003 0000006b 00000000 00000000
[ 153.473691] 9b60 00000003 00000000 00000003 00000000 00000092 00000000 0000042f 00000000
[ 153.481877]
[ 153.481877] X24: 0xffff8000eb502008:
[ 153.486927] 2008 00000007 00000000 0175c380 ffff7e00 eb502018 ffff8000 eb502018 ffff8000
[ 153.495111] 2028 00000000 00000000 001609fb 00000002 ffffffff 00000000 0175c480 ffff7e00
[ 153.503296] 2048 eb502048 ffff8000 eb502048 ffff8000 00000000 00000000 001619af 00000007
[ 153.511480] 2068 00000007 00000000 0175c4c0 ffff7e00 eb502078 ffff8000 eb502078 ffff8000
[ 153.519663] 2088 80000000 00000000 001601fb 00000002 ffffffff 00000000 036089c0 ffff7e00
[ 153.527847] 20a8 eb5020d8 ffff8000 31ac4be8 ffff8000 00000000 00000000 001601fb 00000002
[ 153.536031] 20c8 ffffffff 00000000 03608300 ffff7e00 f272daf8 ffff8000 eb5020a8 ffff8000
[ 153.544215] 20e8 00000000 00000000 001603fb 00000001 ffffffff 00000000 048ce700 ffff7e00
[ 153.552399]
[ 153.552399] X25: 0xffff800178125380:
[ 153.557449] 5380 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.565632] 53a0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.573816] 53c0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.582000] 53e0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.590183] 5400 0000002a 00000000 ffffffff ffffffff 00000006 00000000 00000000 00000000
[ 153.598367] 5420 0ad78000 ffff0000 00000003 00c04040 00000000 00000000 00000000 00000000
[ 153.606552] 5440 00000001 00000003 0000001a 00000000 ffff7081 00000000 77402a00 ffff8001
[ 153.614735] 5460 00000003 00000001 00000070 00000070 00000070 00000000 08d40d68 ffff0000
[ 153.622920]
[ 153.622920] X26: 0xffff80005d714f80:
[ 153.627970] 4f80 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.636154] 4fa0 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.644338] 4fc0 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.652523] 4fe0 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.660707] 5000 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.668890] 5020 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.677074] 5040 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.685259] 5060 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.693443]
[ 153.693443] X28: 0xffff8000eb501fe0:
[ 153.698492] 1fe0 eb5e5018 ffff8000 00000000 00000000 00000000 00000000 00000000 00000000
[ 153.706676] 2000 00162243 00000007 00000007 00000000 0175c380 ffff7e00 eb502018 ffff8000
[ 153.714860] 2020 eb502018 ffff8000 00000000 00000000 001609fb 00000002 ffffffff 00000000
[ 153.723044] 2040 0175c480 ffff7e00 eb502048 ffff8000 eb502048 ffff8000 00000000 00000000
[ 153.731228] 2060 001619af 00000007 00000007 00000000 0175c4c0 ffff7e00 eb502078 ffff8000
[ 153.739412] 2080 eb502078 ffff8000 80000000 00000000 001601fb 00000002 ffffffff 00000000
[ 153.747596] 20a0 036089c0 ffff7e00 eb5020d8 ffff8000 31ac4be8 ffff8000 00000000 00000000
[ 153.755780] 20c0 001601fb 00000002 ffffffff 00000000 03608300 ffff7e00 f272daf8 ffff8000
[ 153.763965]
[ 153.765455] Process MessageThread (pid: 2723, stack limit 0xffff00000ad78000)
[ 153.772762] Call trace:
[ 153.775208] Exception stack(0xffff00000ad7b4d0 to 0xffff00000ad7b610)
[ 153.781649] b4c0: 0000000000000000 8001800180018000
[ 153.789479] b4e0: 0000000000000001 0000000000000000 0000000000000001 0000000000000000
[ 153.797309] b500: ffff8000d8228000 8000800080008000 8001800180018001 0000000000000005
[ 153.805139] b520: 0000000000000000 0000000000000140 0000000000000000 00000000000000c1
[ 153.812969] b540: ffff0000091d2018 0001182270000000 ffff80017ff16b00 0000000000000001
[ 153.820798] b560: 0000000000000000 00000000000008e0 ffff800158629b00 ffff7e000175c540
[ 153.828629] b580: ffff7e0004615680 ffff7e000175c550 ffff8000eb502088 ffff800178125400
[ 153.836459] b5a0: ffff80005d715000 00000000000008e0 ffff8000eb502060 ffff00000ad7b6a0
[ 153.844289] b5c0: ffff00000828c814 ffff00000ad7b610 ffff000008cf69a8 0000000040400145
[ 153.852118] b5e0: ffff7e000175c300 0000000000000001 0000ffffffffffff ffff00000ad7b6e8
[ 153.859947] b600: ffff00000ad7b6a0 ffff000008cf69a8
[ 153.864825] [ffff000008cf69a8] test_and_set_bit0x18/0x38
[ 153.870399] [ffff0000082770b4] move_to_new_page0x2bc/0x2e0
[ 153.876145] [ffff0000082755ec] migrate_pages0x62c/0x928
[ 153.881632] [ffff000008208400] alloc_contig_range0x194/0x4ac
[ 153.887553] [ffff00000828e4a4] cma_alloc0x144/0x2f4
[ 153.892693] [ffff0000086d5c04] dma_alloc_from_contiguous0x2c/0x34
[ 153.899048] [ffff00000809ea08] __dma_alloc0x150/0x298
[ 153.904362] [ffff00000893253c] vb2_dc_alloc0x104/0x164
[ 153.909759] [ffff00000892c798] __vb2_queue_alloc0x184/0x494
[ 153.915592] [ffff00000892bc6c] vb2_core_reqbufs0x264/0x42c
[ 153.921337] [ffff000008931294] vb2_ioctl_reqbufs0x6c/0x94
[ 153.926997] [ffff0000089174ec] v4l_reqbufs0x48/0x58
[ 153.932135] [ffff000008914f1c] __video_do_ioctl0x130/0x26c
[ 153.937880] [ffff000008914b00] video_usercopy0x2f0/0x5c0
[ 153.943453] [ffff000008914de4] video_ioctl20x14/0x1c
[ 153.948678] [ffff0000089142e4] v4l2_ioctl0x9c/0xc4
[ 153.953730] [ffff0000082a913c] do_vfs_ioctl0x554/0x810
[ 153.959129] [ffff0000082a9564] SyS_ioctl0x88/0x94
[ 153.964092] Exception stack(0xffff00000ad7bec0 to 0xffff00000ad7c000)
[ 153.970532] bec0: 0000000000000009 00000000c0145608 0000f168e12bcab8 0000000000000003
[ 153.978363] bee0: 0000000000000000 0000000000000018 fefff067e02aceff 7f7fff7fff7fff7f
[ 153.986193] bf00: 000000000000001d 0000f168e12bc9b8 0000f168e12bc980 0000f168e12bc9b8
[ 153.994023] bf20: 0000f168e12bca00 ffffffffffffffff 0000000000000004 ffffffffffffffff
[ 154.001853] bf40: 0000f168e1328f18 0000f168e2890308 0000f168df8c8000 0000f168e12bd020
[ 154.009682] bf60: 0000f168e2051000 0000000000000000 0000f168e12bca70 0000f168e12bd020
[ 154.017512] bf80: 0000f168e12bcd50 0000f168e12bcd50 0000f168e12bd020 0000f168e3585020
[ 154.025342] bfa0: 0000f168e1313708 0000f168e12bc9f0 0000f168e2890390 0000f168e12bc900
[ 154.033172] bfc0: 0000f168e28d2888 00000000a0000000 0000000000000009 000000000000001d
[ 154.041002] bfe0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[ 154.048832] [ffff000008083ac0] el0_svc_naked0x34/0x38
[ 154.054144] Code: d2800022 8b400c21 f9800031 9ac32044 (c85f7c22)
[ 154.060244] SMP: stopping secondary CPUs
[ 154.064172] ---[ end trace d3ae0601ebdf78fc ]---
[ 154.071764] Kernel panic - not syncing: Fatal exception
[ 154.076996] SMP: stopping secondary CPUs
[ 155.080920] SMP: failed to stop secondary CPUs 0-3结合现场和对应kernel版本的vmlinux分析可以推算出在test_and_set_bit()函数里出现了访问非法地址的行为触发了data abort异常对应汇编信息如下
ffff000008cf6990 test_and_set_bit:
ffff000008cf6990: 12001403 and w3, w0, #0x3f //x3 x0 0x3f
ffff000008cf6994: 4a030000 eor w0, w0, w3 //x0 x0^x3
ffff000008cf6998: d2800022 mov x2, #0x1 // #1
ffff000008cf699c: 8b400c21 add x1, x1, x0, lsr #3 //x1 x1 (x0 3)
ffff000008cf69a0: f9800031 prfm pstl1strm, [x1]
ffff000008cf69a4: 9ac32044 lsl x4, x2, x3
ffff000008cf69a8: c85f7c22 ldxr x2, [x1] //panic, x10x8001800180018000, x00
ffff000008cf69ac: 9ac32440 lsr x0, x2, x3
ffff000008cf69b0: aa040042 orr x2, x2, x4
ffff000008cf69b4: c805fc22 stlxr w5, x2, [x1]
ffff000008cf69b8: 35ffff85 cbnz w5, ffff000008cf69a8 test_and_set_bit0x18
ffff000008cf69bc: d5033bbf dmb ish
ffff000008cf69c0: 92400000 and x0, x0, #0x1
ffff000008cf69c4: d65f03c0 ret函数的调用路径及实现如下
zs_page_migrate(struct address_space *mapping, struct page *newpage, struct page *page, enum migrate_mode mode)trypin_tag(unsigned long handle)bit_spin_trylock(int bitnum, unsigned long *addr)static inline int trypin_tag(unsigned long handle)
{return bit_spin_trylock(HANDLE_PIN_BIT, (unsigned long *)handle);
}
...
static int zs_page_migrate(struct address_space *mapping, struct page *newpage,struct page *page, enum migrate_mode mode)
{struct zs_pool *pool;struct size_class *class;int class_idx;enum fullness_group fullness;struct zspage *zspage;struct page *dummy;void *s_addr, *d_addr, *addr;int offset, pos;unsigned long handle, head;unsigned long old_obj, new_obj;unsigned int obj_idx;int ret -EAGAIN;/** We cannot support the _NO_COPY case here, because copy needs to* happen under the zs lock, which does not work with* MIGRATE_SYNC_NO_COPY workflow.*/if (mode MIGRATE_SYNC_NO_COPY)return -EINVAL;VM_BUG_ON_PAGE(!PageMovable(page), page);VM_BUG_ON_PAGE(!PageIsolated(page), page);zspage get_zspage(page);/* Concurrent compactor cannot migrate any subpage in zspage */migrate_write_lock(zspage);get_zspage_mapping(zspage, class_idx, fullness);pool mapping-private_data;class pool-size_class[class_idx];offset get_first_obj_offset(page);spin_lock(class-lock);if (!get_zspage_inuse(zspage)) {/** Set offset to end of the page so that every loops* skips unnecessary object scanning.*/offset PAGE_SIZE;}pos offset;s_addr kmap_atomic(page);while (pos PAGE_SIZE) {head obj_to_head(page, s_addr pos);if (head OBJ_ALLOCATED_TAG) {handle head ~OBJ_ALLOCATED_TAG;if (!trypin_tag(handle))goto unpin_objects;}pos class-size;}/** Here, any user cannot access all objects in the zspage so lets move.*/d_addr kmap_atomic(newpage);memcpy(d_addr, s_addr, PAGE_SIZE);kunmap_atomic(d_addr);for (addr s_addr offset; addr s_addr pos;addr class-size) {head obj_to_head(page, addr);if (head OBJ_ALLOCATED_TAG) {handle head ~OBJ_ALLOCATED_TAG;if (!testpin_tag(handle))BUG();old_obj handle_to_obj(handle);obj_to_location(old_obj, dummy, obj_idx);new_obj (unsigned long)location_to_obj(newpage,obj_idx);new_obj | BIT(HANDLE_PIN_BIT);record_obj(handle, new_obj);}}replace_sub_page(class, zspage, newpage, page);get_page(newpage);dec_zspage_isolation(zspage);/** Page migration is done so lets putback isolated zspage to* the list if page is final isolated subpage in the zspage.*/if (!is_zspage_isolated(zspage)) {/** We cannot race with zs_destroy_pool() here because we wait* for isolation to hit zero before we start destroying.* Also, we ensure that everyone can see pool-destroying before* we start waiting.*/putback_zspage_deferred(pool, class, zspage);zs_pool_dec_isolated(pool);}if (page_zone(newpage) ! page_zone(page)) {dec_zone_page_state(page, NR_ZSPAGES);inc_zone_page_state(newpage, NR_ZSPAGES);}reset_page(page);put_page(page);page newpage;ret MIGRATEPAGE_SUCCESS;
unpin_objects:for (addr s_addr offset; addr s_addr pos;addr class-size) {head obj_to_head(page, addr);if (head OBJ_ALLOCATED_TAG) {handle head ~OBJ_ALLOCATED_TAG;if (!testpin_tag(handle))BUG();unpin_tag(handle);}}kunmap_atomic(s_addr);spin_unlock(class-lock);migrate_write_unlock(zspage);return ret;
}结合源码分析可以确认是handler这个变量出现问题了从现场寄存器信息来看x18001800180018000与panic时log提示的现场一致
分析上下文因为在zs_page_migrate()函数中直接调用了test_and_set_bit()所以通过zs_page_migrate()的汇编代码看看是否可以获取handler的值从汇编信息看zs_page_migrate()中调用了test_and_set_bit()的汇编如下所示
...
ffff00000828c7e0: 910042b7 add x23, x21, #0x10
ffff00000828c7e4: f94002a8 ldr x8, [x21]
ffff00000828c7e8: 8b1b0349 add x9, x26, x27
ffff00000828c7ec: f277011f tst x8, #0x200
ffff00000828c7f0: 9a970128 csel x8, x9, x23, eq // eq none
ffff00000828c7f4: f9400108 ldr x8, [x8]
ffff00000828c7f8: 36000108 tbz w8, #0, ffff00000828c818 zs_page_migrate0x108
ffff00000828c7fc: b9401329 ldr w9, [x25, #16]
ffff00000828c800: 927ff901 and x1, x8, #0xfffffffffffffffe
ffff00000828c804: 2a1f03e0 mov w0, wzr
ffff00000828c808: 11000529 add w9, w9, #0x1
ffff00000828c80c: b9001329 str w9, [x25, #16]
ffff00000828c810: 9429a860 bl ffff000008cf6990 test_and_set_bit
ffff00000828c814: 350009c0 cbnz w0, ffff00000828c94c zs_page_migrate0x23c
ffff00000828c818: b9404a88 ldr w8, [x20, #72]
ffff00000828c81c: 0b130113 add w19, w8, w19
ffff00000828c820: 7140067f cmp w19, #0x1, lsl #12
ffff00000828c824: 93407e7b sxtw x27, w19
ffff00000828c828: 54fffde3 b.cc ffff00000828c7e4 zs_page_migrate0xd4
...因为test_and_set_bit()只有两个参数x0和x1从汇编分析x0是0x1 x8 0xfffffffffffffffe, x8 0x8001800180018001 所以x1 0x8001800180018000因此出现问题时在zs_page_migrate()取到的x8的值就有问题且x8表示head这个变量0xfffffffffffffffe刚好是OBJ_ALLOCATED_TAG这个宏的取反所有说明获取到的head变量已经出现不正确了继续分析这个head变量的获取源码如下:
static unsigned long obj_to_head(struct page *page, void *obj)
{if (unlikely(PageHugeObject(page))) {VM_BUG_ON_PAGE(!is_first_page(page), page);return page-index;} elsereturn *(unsigned long *)obj;
}结合源码在zs_page_migrate()函数中通过obj_to_head()函数返回到对应的head结合汇编分析可以看出x23表示page-indexx9是objobj参数是在zs_page_migrate()计算出来的该函数返回page-index或者返回obj这个指针指向的内存数据。
结合源码可以推算出x26表示s_addr这个变量x260xffff80005d715000, x27表示pos这个变量x270x00000000000008e0因此obj这个指针的值是0xffff80005d7158e0page这个指针的值是page 0xffff7e000175c540而handler就是从这两块内存地址获取到的。
从panic现场打印的数据信息看head的值大概率应该是从x26这块内存获取到的就是返回了obj这个指针指向的内存数据因为现场没有打印出page这个指针指向的内存数据只能从数据上进行猜测但从x26这块内存数据看这一块内存的数据都被填充成0x80018001大概率是dma设备发生了内存踩踏导致需要分析数据规律来进一步定位。
[ 153.622920] X26: 0xffff80005d714f80:
[ 153.627970] 4f80 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.636154] 4fa0 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.644338] 4fc0 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.652523] 4fe0 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.660707] 5000 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.668890] 5020 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.677074] 5040 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
[ 153.685259] 5060 80018001 80018001 80018001 80018001 80018001 80018001 80018001 80018001
