Tested Bionic kernel on Cavium ThunderX2 with the patch. ubuntu@starbuck:~$ uname -a Linux starbuck 4.15.0-25-generic #26~lp1777716+build.1 SMP Tue Jun 19 19:25:21 UTC 2018 aarch64 aarch64 aarch64 GNU/Linux ubuntu@starbuck:~$ dmesg | grep ipmi_ssif [ 45.648719] ipmi_ssif: probe of dmi-ipmi-ssif.0 failed with error -17 [ 45.648772] ipmi_ssif: probe of dmi-ipmi-ssif.1 failed with error -17 [ 45.684502] ipmi_ssif: Trying SPMI-specified SSIF interface at i2c address 0xe, adapter xlp9xx-i2c, slave address 0x0 [ 45.804171] ipmi_ssif 0-000e: Found new BMC (man_id: 0x000000, prod_id: 0x0202, dev_id: 0x20) ubuntu@starbuck:~$ lsmod | grep ssif ipmi_ssif 40960 0 ipmi_msghandler 61440 2 ipmi_ssif,ipmi_devintf ubuntu@starbuck:~$
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1777716 Title: [SRU Bionic][Cosmic] kernel panic in ipmi_ssif at msg_done_handler Status in linux package in Ubuntu: Incomplete Bug description: [Impact] When you boot bionic with Boot with i2c and ipmi_ssif enabled on Cavium ThunderX2 systems with a faulty BMC that does not return any data, and the code is trying to print the value if data[2], we get a kernel panic. [ 484.728410] Unable to handle kernel NULL pointer dereference at virtual address 00000002 [ 484.736496] pgd = ffff0000094a2000 [ 484.739885] [00000002] *pgd=00000047fcffe003, *pud=00000047fcffd003, *pmd=0000000000000000 [ 484.748158] Internal error: Oops: 96000005 [#1] SMP [...] [ 485.101451] Call trace: [...] [ 485.188473] [<ffff000000a46e68>] msg_done_handler+0x668/0x700 [ipmi_ssif] [ 485.195249] [<ffff000000a456b8>] ipmi_ssif_thread+0x110/0x128 [ipmi_ssif] [ 485.202038] [<ffff0000080f1430>] kthread+0x108/0x138 [ 485.206994] [<ffff0000080838e0>] ret_from_fork+0x10/0x30 [ 485.212294] Code: aa1903e1 aa1803e0 b900227f 95fef6a5 (39400aa3) [Test] - System with faulty BMC - Boot with i2c and ipmi_ssif enabled. [Fix] Fixed upstream with: commit f002612b9d86613bc6fde0a444e0095225f6053e Author: Kamlakant Patel <kamlakant.pa...@cavium.com> Date: Tue Mar 13 16:32:27 2018 +0530 ipmi_ssif: Fix kernel panic at msg_done_handler [Regression Potential] ipmi_ssif is only loaded on ARM64 systems, this issue is observed only on Cavium ThunderX2 systems with a faulty BMC. The fix does not impact other architectures or vendor systems. Regression potential is low. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1777716/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
