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alistair23-linux/arch/mips
Alexander Lobakin f7a97dc302 MIPS: relocatable: fix possible boot hangup with KASLR enabled
commit 69e976831c upstream.

LLVM-built Linux triggered a boot hangup with KASLR enabled.

arch/mips/kernel/relocate.c:get_random_boot() uses linux_banner,
which is a string constant, as a random seed, but accesses it
as an array of unsigned long (in rotate_xor()).
When the address of linux_banner is not aligned to sizeof(long),
such access emits unaligned access exception and hangs the kernel.

Use PTR_ALIGN() to align input address to sizeof(long) and also
align down the input length to prevent possible access-beyond-end.

Fixes: 405bc8fd12 ("MIPS: Kernel: Implement KASLR using CONFIG_RELOCATABLE")
Cc: stable@vger.kernel.org # 4.7+
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-19 18:26:12 +01:00
..
alchemy MIPS: Alchemy: Fix memleak in alchemy_clk_setup_cpu 2020-11-24 13:29:07 +01:00
ar7 The main MIPS changes for a pretty light v5.3 cycle, including: 2019-07-17 09:42:03 -07:00
ath25 PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
ath79 The main MIPS changes for a pretty light v5.3 cycle, including: 2019-07-17 09:42:03 -07:00
bcm47xx MIPS: BCM47XX: fix kconfig dependency bug for BCM47XX_BCMA 2020-12-30 11:51:07 +01:00
bcm63xx MIPS: bmips: mark exception vectors as char arrays 2019-10-23 21:07:28 -07:00
bmips docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
boot MIPS: boot: Fix unaligned access with CONFIG_MIPS_RAW_APPENDED_DTB 2021-01-19 18:26:12 +01:00
cavium-octeon MIPS: OCTEON: add missing put_device() call in dwc3_octeon_device_init() 2020-08-19 08:16:15 +02:00
cobalt treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
configs scsi: sr: remove references to BLK_DEV_SR_VENDOR, leave it enabled 2020-07-22 09:32:57 +02:00
crypto MIPS: crypto: Add crc32 and crc32c hw accelerated module 2018-02-19 20:50:36 +00:00
dec MIPS: DEC: Restore bootmem reservation for firmware working memory area 2020-11-05 11:43:30 +01:00
emma treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
fw MIPS: fw: sni: Fix out of bounds init of o32 stack 2019-10-09 12:47:28 -07:00
generic treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
include arch: pgtable: define MAX_POSSIBLE_PHYSMEM_BITS where needed 2020-12-02 08:49:50 +01:00
jazz dma-mapping: explicitly wire up ->mmap and ->get_sgtable 2019-09-04 11:13:18 +02:00
jz4740 Merge branch 'ingenic-tcu-v5.4' into mips-next 2019-08-08 15:33:16 -07:00
kernel MIPS: relocatable: fix possible boot hangup with KASLR enabled 2021-01-19 18:26:12 +01:00
kvm KVM: MIPS: Change the definition of kvm type 2020-09-23 12:40:38 +02:00
lantiq MIPS: lantiq: xway: sysctrl: fix the GPHY clock alias names 2020-07-09 09:37:56 +02:00
lasat treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 182 2019-05-30 11:29:20 -07:00
lib mips: lib: uncached: fix non-standard usage of variable 'sp' 2021-01-19 18:26:12 +01:00
loongson32 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
loongson64 MIPS: Loongson: Fix potential NULL dereference in loongson3_platform_init() 2020-02-24 08:36:27 +01:00
math-emu treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 454 2019-06-19 17:09:09 +02:00
mm mips: fix Section mismatch in reference 2021-01-19 18:26:12 +01:00
mti-malta MIPS: malta: Drop prom_free_prom_memory 2019-08-23 14:47:13 +01:00
net bpf, mips: Limit to 33 tail calls 2020-01-12 12:21:24 +01:00
netlogic MIPS: xlp: Drop boot_mem_map 2019-08-23 14:47:21 +01:00
oprofile MIPS: OProfile: Mark expected switch fall-throughs 2019-07-30 09:40:17 -07:00
paravirt mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pci MIPS: PCI: Fix MIPS build 2020-11-22 10:14:11 +01:00
pic32 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 445 2019-06-05 17:37:18 +02:00
pistachio A batch of MIPS fixes: 2019-06-08 13:09:31 -07:00
pmcs-msp71xx MIPS: pmcs-msp71xx: Remove unused addr variable 2019-10-03 15:47:17 -07:00
pnx833x A batch of MIPS fixes: 2019-06-08 13:09:31 -07:00
power treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 305 2019-06-05 17:37:04 +02:00
ralink MIPS: ralink: enable PCI support only if driver for mt7621 SoC is selected 2019-12-31 16:45:29 +01:00
rb532 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 182 2019-05-30 11:29:20 -07:00
sgi-ip22 MIPS: ip22: Drop addr_is_ram 2019-08-23 14:47:18 +01:00
sgi-ip27 MIPS: SGI-IP27: Fix crash, when CPUs are disabled via nr_cpus parameter 2020-01-17 19:48:55 +01:00
sgi-ip32 Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2019-07-08 21:48:15 -07:00
sibyte treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
sni MIPS: SNI: Fix spurious interrupts 2020-09-23 12:40:42 +02:00
tools MIPS: tools: Fix resource leak in elf-entry.c 2020-06-22 09:31:08 +02:00
txx9 A batch of MIPS fixes: 2019-06-08 13:09:31 -07:00
vdso mips/vdso: Fix resource leaks in genvdso.c 2020-09-03 11:26:45 +02:00
vr41xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
Kbuild treewide: Add SPDX license identifier - Kbuild 2019-05-30 11:32:33 -07:00
Kbuild.platforms treewide: Add SPDX license identifier - Kbuild 2019-05-30 11:32:33 -07:00
Kconfig MIPS: SNI: Fix MIPS_L1_CACHE_SHIFT 2020-09-23 12:40:41 +02:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile MIPS: Truncate link address into 32bit for 32bit kernel 2020-06-22 09:31:03 +02:00
Makefile.postlink MIPS: fix indentation of the 'RELOCS' message 2020-02-11 04:35:16 -08:00