Xiaoming Ni d0ac17b9ba powerpc/85xx: Fix oops when CONFIG_FSL_PMC=n ... [ Upstream commit 3dc709e518 ] When CONFIG_FSL_PMC is set to n, no value is assigned to cpu_up_prepare in the mpc85xx_pm_ops structure. As a result, oops is triggered in smp_85xx_start_cpu(). smp: Bringing up secondary CPUs ... kernel tried to execute user page (0) - exploit attempt? (uid: 0) BUG: Unable to handle kernel instruction fetch (NULL pointer?) Faulting instruction address: 0x00000000 Oops: Kernel access of bad area, sig: 11 [#1] ... NIP [00000000] 0x0 LR [c0021d2c] smp_85xx_kick_cpu+0xe8/0x568 Call Trace: [c1051da8] [c0021cb8] smp_85xx_kick_cpu+0x74/0x568 (unreliable) [c1051de8] [c0011460] __cpu_up+0xc0/0x228 [c1051e18] [c0031bbc] bringup_cpu+0x30/0x224 [c1051e48] [c0031f3c] cpu_up.constprop.0+0x180/0x33c [c1051e88] [c00322e8] bringup_nonboot_cpus+0x88/0xc8 [c1051eb8] [c07e67bc] smp_init+0x30/0x78 [c1051ed8] [c07d9e28] kernel_init_freeable+0x118/0x2a8 [c1051f18] [c00032d8] kernel_init+0x14/0x124 [c1051f38] [c0010278] ret_from_kernel_thread+0x14/0x1c Fixes: c45361abb9 ("powerpc/85xx: fix timebase sync issue when CONFIG_HOTPLUG_CPU=n") Reported-by: Martin Kennedy <hurricos@gmail.com> Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com> Tested-by: Martin Kennedy <hurricos@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211126041153.16926-1-nixiaoming@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-12-22 09:32:45 +01:00
..
4xx	powerpc: Add esr as a synonym for pt_regs.dsisr	2021-08-26 21:21:06 +10:00
8xx	powerpc: bad_page_fault get registers from regs	2021-02-09 00:02:09 +11:00
40x	powerpc: Remove IBM405 Erratum #77	2020-05-28 23:24:36 +10:00
44x	powerpc/44x/fsp2: add missing of_node_put	2021-11-18 19:16:57 +01:00
52xx	powerpc: Bulk conversion to generic_handle_domain_irq()	2021-08-12 11:39:41 +01:00
82xx	powerpc: Bulk conversion to generic_handle_domain_irq()	2021-08-12 11:39:41 +01:00
83xx	powerpc/83xx: Fix build error when CONFIG_PCI=n	2021-02-11 23:28:51 +11:00
85xx	powerpc/85xx: Fix oops when CONFIG_FSL_PMC=n	2021-12-22 09:32:45 +01:00
86xx	powerpc: retire sbc8641d board support	2021-08-27 00:48:18 +10:00
512x	powerpc: Bulk conversion to generic_handle_domain_irq()	2021-08-12 11:39:41 +01:00
amigaone	powerpc/amigaone: Make amigaone_discover_phbs() static	2021-02-11 23:28:51 +11:00
book3s	powerpc/vas: Fix potential NULL pointer dereference	2021-11-18 19:17:19 +01:00
cell	powerpc: rename powerpc_debugfs_root to arch_debugfs_dir	2021-08-13 22:04:26 +10:00
chrp	powerpc/chrp: Make hydra_init() static	2021-03-24 14:09:29 +11:00
embedded6xx	powerpc: Refactor verification of MSR_RI	2021-08-26 21:21:07 +10:00
maple	powerpc/pci: fix warning comparing pointer to 0	2021-03-29 13:22:13 +11:00
microwatt	powerpc/microwatt: Add support for hardware random number generator	2021-06-21 21:16:32 +10:00
pasemi	powerpc updates for 5.15	2021-09-03 11:22:50 -07:00
powermac	powerpc/smp: Fix fall-through warning for Clang	2021-07-14 11:10:40 -05:00
powernv	powerpc/powernv/prd: Unregister OPAL_MSG_PRD2 notifier during module unload	2021-11-18 19:17:19 +01:00
ps3	powerpc updates for 5.15	2021-09-03 11:22:50 -07:00
pseries	powerpc/pseries/ddw: Do not try direct mapping with persistent memory and one window	2021-12-08 09:04:37 +01:00
Kconfig	powerpc/64s: Make prom_init require RELOCATABLE	2021-06-25 14:47:19 +10:00
Kconfig.cputype	powerpc: Re-enable ARCH_ENABLE_SPLIT_PMD_PTLOCK	2021-08-20 12:38:50 +10:00
Makefile	powerpc: Add Microwatt platform	2021-06-21 21:15:26 +10:00
fsl_uli1575.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00