Helge Deller f9cd0c8318 parisc: Fix kernel panic in mem_init() ... [ Upstream commit bf71bc16e0 ] 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: Sasha Levin <sashal@kernel.org>		2020-06-03 08:21:28 +02:00
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Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
fault.c	parisc: Mark expected switch fall-throughs in fault.c	2019-07-31 16:16:00 +02:00
fixmap.c	parisc: add dynamic ftrace	2019-06-08 12:56:29 +02:00
hugetlbpage.c	parisc: Update huge TLB page support to use per-pagetable spinlock	2019-05-03 23:47:41 +02:00
init.c	parisc: Fix kernel panic in mem_init()	2020-06-03 08:21:28 +02:00
ioremap.c	parisc: Fix vmap memory leak in ioremap()/iounmap()	2019-10-14 21:44:17 +02:00