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linux/arch/parisc
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Helge Deller 2345ef960d parisc: fix mmap_base calculation when stack grows upwards 
commit 5f74f820f6 upstream.

Matoro reported various userspace crashes on the parisc platform with kernel
6.6 and bisected it to commit 3033cd4307 ("parisc: Use generic mmap top-down
layout and brk randomization").

That commit switched parisc to use the common infrastructure to calculate
mmap_base, but missed that the mmap_base() function takes care for
architectures where the stack grows downwards only.

Fix the mmap_base() calculation to include the stack-grows-upwards case
and thus fix the userspace crashes on parisc.

Link: https://lkml.kernel.org/r/ZVH2qeS1bG7/1J/l@p100
Fixes: 3033cd4307 ("parisc: Use generic mmap top-down layout and brk randomization")
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Tested-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Cc: <stable@vger.kernel.org>	[6.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-11-28 17:20:08 +00:00
..
boot parisc: boot: Nuke some sparse warnings in decompressor 2023-08-10 22:42:57 +02:00
configs arch/*/configs/*defconfig: Replace AUTOFS4_FS by AUTOFS_FS 2023-07-29 14:08:22 -07:00
include parisc: fix mmap_base calculation when stack grows upwards 2023-11-28 17:20:08 +00:00
kernel parisc: fix mmap_base calculation when stack grows upwards 2023-11-28 17:20:08 +00:00
lib parisc: ucmpdi2: Fix no previous prototype for '__ucmpdi2' warning 2023-08-10 18:34:05 +02:00
math-emu parisc: math-emu: Avoid compiler warnings with W=1 2023-07-03 18:56:03 +02:00
mm mm: hugetlb: add huge page size param to set_huge_pte_at() 2023-09-29 17:20:47 -07:00
net parisc: Add eBPF JIT compiler glue code and Makefile 2023-08-22 10:24:47 +02:00
video fbdev: Include <linux/fb.h> instead of <asm/fb.h> 2023-05-18 11:06:21 +02:00
defpalo.conf
install.sh kbuild: factor out the common installation code into scripts/install.sh 2022-05-11 21:45:53 +09:00
Kbuild parisc: Wire up eBPF JIT compiler 2023-08-22 10:24:47 +02:00
Kconfig parisc: fix mmap_base calculation when stack grows upwards 2023-11-28 17:20:08 +00:00
Kconfig.debug parisc: Use page table locks only if DEBUG_KERNEL is enabled 2023-08-20 20:23:46 +02:00
Makefile arch/parisc: Implement fb_is_primary_device() under arch/parisc 2023-04-20 10:04:58 +02:00