For QFX5110 devices we may observe that after upgrade/reboot/power cycle, the device does not come up and on the console we observe continuous scrolling of boot logs.
Following logs seen on the console.
BUG: unable to handle kernel NULL pointer dereference at 00000000000002c0 IP: [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] PGD 446fd6067 PUD 27fa84067 PMD 0 Oops: 0000 [#364] SMP Modules linked in: linux_user_bde(PO+) linux_kernel_bde(PO) xt_NFQUEUE vhost_net vhost macvtap vfio_iommu_type1 vfio_pci vfio act_mirred sch_ingress sch_htb ifb nbd aufs pci_stub iptable_mangle ipt_REJECT xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nfsd bios_drv(O) re_lpc_fpga_drv(O) intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crct10dif_common aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd iTCO_wdt gpio_ich iTCO_vendor_support i2c_i801 lpc_ich fan igb(O) CPU: 5 PID: 11333 Comm: dcpfe Tainted: P D O 3.14.52-rt50-WR7.0.0.9_ovp #1 Hardware name: Juniper Networks 0C4F/Type2 - Board Product Name1, BIOS QFXS_SFP_00.33_00.01 04/18/2017 task: ffff880339fb4490 ti: ffff88033c3f8000 task.ti: ffff88033c3f8000 RIP: 0010:[<ffffffffa003390f>] [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP: 0018:ffff88033c3fbdb0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000020000000 RCX: 0000000000000000 RDX: 0000000040000000 RSI: ffffea0000e00000 RDI: 0000000000000098 RBP: ffff880040000000 R08: 00000000ff84f930 R09: 000000000000000c R10: 00000000f7780b20 R11: 0000000000000000 R12: ffff88033c3fbdf8 R13: ffff88033c3fbdf0 R14: ffff88033c3fbde8 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff88045fd40000(0063) knlGS:00000000f737bac0 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000000002c0 CR3: 000000027faa8000 CR4: 00000000001427e0 Stack: 0000000000004c05 00000000ff84f8d4 0000000000000000 ffff88044925b340 ffff88044925b340 ffffffffa004d4b2 ffff880300000000 ffff880339ec5b98 000000042f02d865 000000803c3fbe18 ffffffff000000a9 0000000000000062 Call Trace: [<ffffffffa004d4b2>] ? _ioctl+0x225/0x76e [linux_user_bde] [<ffffffffa004ddc8>] ? _gmodule_compat_ioctl+0x1c/0x20 [linux_user_bde] [<ffffffff811de580>] ? compat_sys_ioctl+0xc0/0x13e0 [<ffffffff810b5e09>] ? __getnstimeofday+0x39/0xd0 [<ffffffff81042dbc>] ? do_page_fault+0xc/0x10 [<ffffffff818ecd8f>] ? sysenter_dispatch+0x7/0x1e Code: 48 01 f0 48 be 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 6b c0 38 48 01 c6 48 8b 05 4d 94 00 00 48 89 c7 48 81 c7 98 00 00 00 74 0c <4c> 8b 90 c0 02 00 00 4d 85 d2 75 07 4c 8b 15 4e 45 de e1 45 31 RIP [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP <ffff88033c3fbdb0> CR2: 00000000000002c0 ---[ end trace 713078497440876b ]--- BUG: unable to handle kernel NULL pointer dereference at 00000000000002c0 IP: [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] PGD 44571b067 PUD 33bce8067 PMD 0 Oops: 0000 [#365] SMP Modules linked in: linux_user_bde(PO+) linux_kernel_bde(PO) xt_NFQUEUE vhost_net vhost macvtap vfio_iommu_type1 vfio_pci vfio act_mirred sch_ingress sch_htb ifb nbd aufs pci_stub iptable_mangle ipt_REJECT xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nfsd bios_drv(O) re_lpc_fpga_drv(O) intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crct10dif_common aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd iTCO_wdt gpio_ich iTCO_vendor_support i2c_i801 lpc_ich fan igb(O) CPU: 5 PID: 11770 Comm: dcpfe Tainted: P D O 3.14.52-rt50-WR7.0.0.9_ovp #1 Hardware name: Juniper Networks 0C4F/Type2 - Board Product Name1, BIOS QFXS_SFP_00.33_00.01 04/18/2017 task: ffff880447dfa250 ti: ffff88044722c000 task.ti: ffff88044722c000 RIP: 0010:[<ffffffffa003390f>] [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP: 0018:ffff88044722fdb0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000020000000 RCX: 0000000000000000 RDX: 0000000040000000 RSI: ffffea0000e00000 RDI: 0000000000000098 RBP: ffff880040000000 R08: 00000000ff82c6a0 R09: 000000000000000c R10: 00000000f774bb20 R11: 0000000000000000 R12: ffff88044722fdf8 R13: ffff88044722fdf0 R14: ffff88044722fde8 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff88045fd40000(0063) knlGS:00000000f7346ac0 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000000002c0 CR3: 0000000446fd6000 CR4: 00000000001427e0 Stack: 0000000000004c05 00000000ff82c644 0000000000000000 ffff880448e80280 ffff880448e80280 ffffffffa004d4b2 ffff880400000000 ffff880339e0cb98 0000000303504865 000000804722fe18 ffffffff000000a9 0000000000000062 Call Trace: [<ffffffffa004d4b2>] ? _ioctl+0x225/0x76e [linux_user_bde] [<ffffffffa004ddc8>] ? _gmodule_compat_ioctl+0x1c/0x20 [linux_user_bde] [<ffffffff811de580>] ? compat_sys_ioctl+0xc0/0x13e0 [<ffffffff810b5e09>] ? __getnstimeofday+0x39/0xd0 [<ffffffff81042dbc>] ? do_page_fault+0xc/0x10 [<ffffffff818ecd8f>] ? sysenter_dispatch+0x7/0x1e Code: 48 01 f0 48 be 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 6b c0 38 48 01 c6 48 8b 05 4d 94 00 00 48 89 c7 48 81 c7 98 00 00 00 74 0c <4c> 8b 90 c0 02 00 00 4d 85 d2 75 07 4c 8b 15 4e 45 de e1 45 31 RIP [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP <ffff88044722fdb0> CR2: 00000000000002c0 ---[ end trace 713078497440876c ]--- BUG: unable to handle kernel NULL pointer dereference at 00000000000002c0 IP: [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] PGD 27facc067 PUD 4490f3067 PMD 0 Oops: 0000 [#366] SMP Modules linked in: linux_user_bde(PO+) linux_kernel_bde(PO) xt_NFQUEUE vhost_net vhost macvtap vfio_iommu_type1 vfio_pci vfio act_mirred sch_ingress sch_htb ifb nbd aufs pci_stub iptable_mangle ipt_REJECT xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nfsd bios_drv(O) re_lpc_fpga_drv(O) intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crct10dif_common aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd iTCO_wdt gpio_ich iTCO_vendor_support i2c_i801 lpc_ich fan igb(O) CPU: 5 PID: 12191 Comm: dcpfe Tainted: P D O 3.14.52-rt50-WR7.0.0.9_ovp #1 Hardware name: Juniper Networks 0C4F/Type2 - Board Product Name1, BIOS QFXS_SFP_00.33_00.01 04/18/2017 task: ffff880339c8a3d0 ti: ffff880446618000 task.ti: ffff880446618000 RIP: 0010:[<ffffffffa003390f>] [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP: 0018:ffff88044661bdb0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000020000000 RCX: 0000000000000000 RDX: 0000000040000000 RSI: ffffea0000e00000 RDI: 0000000000000098 RBP: ffff880040000000 R08: 00000000ffee98e0 R09: 000000000000000c R10: 00000000f77b8b20 R11: 0000000000000000 R12: ffff88044661bdf8 R13: ffff88044661bdf0 R14: ffff88044661bde8 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff88045fd40000(0063) knlGS:00000000f73b3ac0 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000000002c0 CR3: 0000000339c97000 CR4: 00000000001427e0 Stack: 0000000000004c05 00000000ffee9884 0000000000000000 ffff880446899d80 ffff880446899d80 ffffffffa004d4b2 ffff880300000000 ffff88027fa7eb98 0000000431801865 000000804661be18 ffffffff000000a9 0000000000000062 Call Trace: [<ffffffffa004d4b2>] ? _ioctl+0x225/0x76e [linux_user_bde] [<ffffffffa004ddc8>] ? _gmodule_compat_ioctl+0x1c/0x20 [linux_user_bde] [<ffffffff811de580>] ? compat_sys_ioctl+0xc0/0x13e0 [<ffffffff810b5e09>] ? __getnstimeofday+0x39/0xd0 [<ffffffff81042dbc>] ? do_page_fault+0xc/0x10 [<ffffffff818ecd8f>] ? sysenter_dispatch+0x7/0x1e Code: 48 01 f0 48 be 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 6b c0 38 48 01 c6 48 8b 05 4d 94 00 00 48 89 c7 48 81 c7 98 00 00 00 74 0c <4c> 8b 90 c0 02 00 00 4d 85 d2 75 07 4c 8b 15 4e 45 de e1 45 31 RIP [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP <ffff88044661bdb0> CR2: 00000000000002c0 ---[ end trace 713078497440876d ]--- BUG: unable to handle kernel NULL pointer dereference at 00000000000002c0 IP: [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] PGD 4443de067 PUD 339d0b067 PMD 0 Oops: 0000 [#367] SMP Modules linked in: linux_user_bde(PO+) linux_kernel_bde(PO) xt_NFQUEUE vhost_net vhost macvtap vfio_iommu_type1 vfio_pci vfio act_mirred sch_ingress sch_htb ifb nbd aufs pci_stub iptable_mangle ipt_REJECT xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nfsd bios_drv(O) re_lpc_fpga_drv(O) intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crct10dif_common aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd iTCO_wdt gpio_ich iTCO_vendor_support i2c_i801 lpc_ich fan igb(O) CPU: 5 PID: 12632 Comm: dcpfe Tainted: P D O 3.14.52-rt50-WR7.0.0.9_ovp #1 Hardware name: Juniper Networks 0C4F/Type2 - Board Product Name1, BIOS QFXS_SFP_00.33_00.01 04/18/2017 task: ffff880447dfa250 ti: ffff88033c300000 task.ti: ffff88033c300000 RIP: 0010:[<ffffffffa003390f>] [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP: 0018:ffff88033c303db0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000020000000 RCX: 0000000000000000 RDX: 0000000040000000 RSI: ffffea0000e00000 RDI: 0000000000000098 RBP: ffff880040000000 R08: 00000000ff9aada0 R09: 000000000000000c R10: 00000000f76f2b20 R11: 0000000000000000 R12: ffff88033c303df8 R13: ffff88033c303df0 R14: ffff88033c303de8 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff88045fd40000(0063) knlGS:00000000f72edac0 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000000002c0 CR3: 0000000446617000 CR4: 00000000001427e0 Stack: 0000000000004c05 00000000ff9aad44 0000000000000000 ffff88033c006180 ffff88033c006180 ffffffffa004d4b2 ffff880400000000 ffff8804460bfb98 0000000430a67865 000000803c303e18 ffffffff000000a9 0000000000000062 Call Trace: [<ffffffffa004d4b2>] ? _ioctl+0x225/0x76e [linux_user_bde] [<ffffffffa004ddc8>] ? _gmodule_compat_ioctl+0x1c/0x20 [linux_user_bde] [<ffffffff811de580>] ? compat_sys_ioctl+0xc0/0x13e0 [<ffffffff810b5e09>] ? __getnstimeofday+0x39/0xd0 [<ffffffff81042dbc>] ? do_page_fault+0xc/0x10 [<ffffffff818ecd8f>] ? sysenter_dispatch+0x7/0x1e Code: 48 01 f0 48 be 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 6b c0 38 48 01 c6 48 8b 05 4d 94 00 00 48 89 c7 48 81 c7 98 00 00 00 74 0c <4c> 8b 90 c0 02 00 00 4d 85 d2 75 07 4c 8b 15 4e 45 de e1 45 31 RIP [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP <ffff88033c303db0> CR2: 00000000000002c0 ---[ end trace 713078497440876e ]--- BUG: unable to handle kernel NULL pointer dereference at 00000000000002c0 IP: [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] PGD 448e81067 PUD 4491ae067 PMD 0 Oops: 0000 [#368] SMP Modules linked in: linux_user_bde(PO+) linux_kernel_bde(PO) xt_NFQUEUE vhost_net vhost macvtap vfio_iommu_type1 vfio_pci vfio act_mirred sch_ingress sch_htb ifb nbd aufs pci_stub iptable_mangle ipt_REJECT xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nfsd bios_drv(O) re_lpc_fpga_drv(O) intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crct10dif_common aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd iTCO_wdt gpio_ich iTCO_vendor_support i2c_i801 lpc_ich fan igb(O) CPU: 5 PID: 13069 Comm: dcpfe Tainted: P D O 3.14.52-rt50-WR7.0.0.9_ovp #1 Hardware name: Juniper Networks 0C4F/Type2 - Board Product Name1, BIOS QFXS_SFP_00.33_00.01 04/18/2017 task: ffff880446920410 ti: ffff880447018000 task.ti: ffff880447018000 RIP: 0010:[<ffffffffa003390f>] [<ffffffffa003390f>] lkbde_get_dma_info+0x93/0x156 [linux_kernel_bde] RSP: 0018:ffff88044701bdb0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000020000000 RCX: 0000000000000000 RDX: 0000000040000000 RSI: ffffea0000e00000 RDI: 0000000000000098 RBP: ffff880040000000 R08: 00000000fffe4680 R09: 000000000000000c R10: 00000000f77a2b20 R11: 0000000000000000 R12: ffff88044701bdf8 R13: ffff88044701bdf0 R14: ffff88044701bde8 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff88045fd40000(0063) knlGS:00000000f739dac0 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000000002c0 CR3: 00000004455b8000 CR4: 00000000001427e0 Stack: 0000000000004c05 00000000fffe4624 0000000000000000 ffff880086347140 ffff880086347140 ffffffffa004d4b2 ffff880400000000 ffff8804450f5b98 000000042fb0f865 000000804701be18 ffffffff000000a9 0000000000000062 Call Trace: [<ffffffffa004d4b2>] ? _ioctl+0x225/0x76e [linux_user_bde] [<ffffffffa004ddc8>] ? _gmodule_compat_ioctl+0x1c/0x20 [linux_user_bde] [<ffffffff811de580>] ? compat_sys_ioctl+0xc0/0x13e0 [<ffffffff810b5e09>] ? __getnstimeofday+0x39/0xd0 [<ffffffff81042dbc>] ? do_page_fault+0xc/0x10 [<ffffffff818ecd8f>] ? sysenter_dispatch+0x7/0x1e Code: 48 01 f0 48 be 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 6b c0 38 48 01 c6 48 8b 05 4d 94 00 00 48 89 c7 48 81 c7 98 00 00 00 74 0c <4c> 8b 90 c0 02 00 00 4d 85 d2 75 07 4c 8b 15 4e 45 de e1 45 31
The above console logs can also be seen in the host logs.