Helge Deller 52234e5518 parisc: Fix kernel panic in mem_init() ... commit bf71bc16e02162388808949b179d59d0b571b965 upstream. The Debian kernel v5.6 triggers this kernel panic: Kernel panic - not syncing: Bad Address (null pointer deref?) Bad Address (null pointer deref?): Code=26 (Data memory access rights trap) at addr 0000000000000000 CPU: 0 PID: 0 Comm: swapper Not tainted 5.6.0-2-parisc64 #1 Debian 5.6.14-1 IAOQ[0]: mem_init+0xb0/0x150 IAOQ[1]: mem_init+0xb4/0x150 RP(r2): start_kernel+0x6c8/0x1190 Backtrace: [<0000000040101ab4>] start_kernel+0x6c8/0x1190 [<0000000040108574>] start_parisc+0x158/0x1b8 on a HP-PARISC rp3440 machine with this memory layout: Memory Ranges: 0) Start 0x0000000000000000 End 0x000000003fffffff Size 1024 MB 1) Start 0x0000004040000000 End 0x00000040ffdfffff Size 3070 MB Fix the crash by avoiding virt_to_page() and similar functions in mem_init() until the memory zones have been fully set up. Signed-off-by: Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org # v5.0+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-06-03 08:19:42 +02:00
..
fault.c	mm: convert return type of handle_mm_fault() caller to vm_fault_t	2018-08-17 16:20:28 -07:00
hugetlbpage.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
init.c	parisc: Fix kernel panic in mem_init()	2020-06-03 08:19:42 +02:00
ioremap.c	parisc: Fix vmap memory leak in ioremap()/iounmap()	2019-10-29 09:20:00 +01:00
Makefile	parisc: Add Huge Page and HUGETLBFS support	2015-11-22 12:23:10 +01:00