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linux/arch/mips/kernel
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Alexander Lobakin f7a97dc302 MIPS: relocatable: fix possible boot hangup with KASLR enabled 
commit 69e976831cd53f9ba304fd20305b2025ecc78eab 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: 405bc8fd12f5 ("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
..
syscalls
MIPS: syscalls: fix indentation of the 'SYSNR' message
2020-02-11 04:35:16 -08:00
.gitignore
…
8250-platform.c
…
asm-offsets.c
MIPS: Remove struct task_struct fpu state when CONFIG_MIPS_FP_SUPPORT=n
2018-11-09 10:23:19 -08:00
binfmt_elfn32.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
binfmt_elfo32.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
bmips_5xxx_init.S
MIPS: BCM5xxx: Remove dead init_fpu code
2018-11-08 11:20:57 -08:00
bmips_vec.S
MIPS: BMIPS: Add Whirlwind (BMIPS5200) initialization code
2016-05-09 12:00:01 +02:00
branch.c
MIPS: Don't use bc_false uninitialized in __mm_isBranchInstr
2019-08-11 21:44:24 -07:00
cacheinfo.c
mips: cacheinfo: report shared CPU map
2020-01-17 19:49:04 +01:00
cevt-bcm1480.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
cevt-ds1287.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1
2019-05-21 11:28:39 +02:00
cevt-gt641xx.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1
2019-05-21 11:28:39 +02:00
cevt-r4k.c
MIPS: cevt-r4k: Fix out-of-bounds array access
2017-04-10 13:31:12 +02:00
cevt-sb1250.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
cevt-txx9.c
MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks
2017-04-14 13:11:16 -07:00
cmpxchg.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cps-vec-ns16550.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cps-vec.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cpu-bugs64.c
MIPS: cpu-bugs64: Mark inline functions as __always_inline
2019-10-01 12:59:59 -07:00
cpu-probe.c
MIPS: elf_hwcap: Export userspace ASEs
2019-10-10 11:57:36 -07:00
crash_dump.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
crash.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
csrc-bcm1480.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
csrc-ioasic.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
csrc-r4k.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
csrc-sb1250.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
early_printk_8250.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1
2019-05-21 11:28:39 +02:00
early_printk.c
mips: unify prom_putchar() declarations
2018-07-17 09:40:17 -07:00
elf.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
entry.S
MIPS: entry: Remove unneeded need_resched() loop
2019-03-19 15:25:45 -07:00
ftrace.c
MIPS: ftrace: Reword prepare_ftrace_return() comment block
2019-06-11 15:46:21 -07:00
genex.S
MIPS: Fix IRQ tracing when call handle_fpe() and handle_msa_fpe()
2020-06-22 09:31:09 +02:00
gpio_txx9.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
head.S
MIPS/head: Store ELF appended dtb in a global variable too
2018-09-25 16:27:24 -07:00
i8253.c
MIPS: kernel: only use i8253 clocksource with periodic clockevent
2019-07-18 14:41:04 -07:00
idle.c
MIPS: Remove unused R4300 CPU support
2019-07-23 14:33:23 -07:00
irq_txx9.c
…
irq-gt641xx.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1
2019-05-21 11:28:39 +02:00
irq-msc01.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
irq-rm7000.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
irq.c
MIPS: irq: Allocate accurate order pages for irq stack
2019-02-19 12:45:01 -08:00
jump_label.c
MIPS: jump_label: Use compact branches for >= r6
2019-04-09 16:21:30 -07:00
kgdb.c
MIPS: KGDB: fix kgdb support for SMP platforms.
2019-03-28 11:35:58 -07:00
kprobes.c
mm, kprobes: generalize and rename notify_page_fault() as kprobe_page_fault()
2019-07-16 19:23:22 -07:00
linux32.c
MIPS: Delete unused code in linux32.c
2018-08-01 13:20:27 -07:00
machine_kexec.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230
2019-06-19 17:09:06 +02:00
Makefile
mips: rename scall64-64.S to scall64-n64.S
2018-12-14 11:19:01 -08:00
mcount.S
mips: ftrace: fix static function graph tracing
2018-06-19 15:00:12 -07:00
mips_machine.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
mips-cm.c
mips: cm: Fix an invalid error code of INTVN_*_ERR
2020-06-22 09:31:03 +02:00
mips-cpc.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
mips-mt-fpaff.c
sched/core: Provide a pointer to the valid CPU mask
2019-06-03 11:49:37 +02:00
mips-mt.c
MIPS: MT: Remove norps command line parameter
2018-11-26 22:49:14 -08:00
mips-r2-to-r6-emul.c
mips: kernel: no need to check return value of debugfs_create functions
2019-01-22 11:17:20 -08:00
module.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
octeon_switch.S
Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables
2018-06-14 12:21:18 +09:00
perf_event_mipsxx.c
The main MIPS changes for a pretty light v5.3 cycle, including:
2019-07-17 09:42:03 -07:00
perf_event.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
pm-cps.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
pm.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
probes-common.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
proc.c
MIPS: Treat Loongson Extensions as ASEs
2019-08-26 11:42:40 +01:00
process.c
MIPS: Remove function size check in get_frame_info()
2019-02-04 15:15:34 -08:00
prom.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
ptrace32.c
MIPS: ptrace: Remove FP support when CONFIG_MIPS_FP_SUPPORT=n
2018-11-09 10:23:17 -08:00
ptrace.c
audit/stable-5.2 PR 20190507
2019-05-07 19:06:04 -07:00
r4k_fpu.S
MIPS: Simplify FP context initialization
2018-11-09 10:23:13 -08:00
r4k_switch.S
Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables
2018-06-14 12:21:18 +09:00
r2300_fpu.S
MIPS: Simplify FP context initialization
2018-11-09 10:23:13 -08:00
r2300_switch.S
Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables
2018-06-14 12:21:18 +09:00
relocate_kernel.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230
2019-06-19 17:09:06 +02:00
relocate.c
MIPS: relocatable: fix possible boot hangup with KASLR enabled
2021-01-19 18:26:12 +01:00
reset.c
MIPS: Hang more efficiently on halt/powerdown/restart
2018-03-09 11:22:43 +00:00
rtlx-cmp.c
…
rtlx-mt.c
…
rtlx.c
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
scall32-o32.S
mips: remove nargs from __SYSCALL
2019-07-30 10:50:30 -07:00
scall64-n32.S
mips: remove nargs from __SYSCALL
2019-07-30 10:50:30 -07:00
scall64-n64.S
mips: remove nargs from __SYSCALL
2019-07-30 10:50:30 -07:00
scall64-o32.S
mips: remove nargs from __SYSCALL
2019-07-30 10:50:30 -07:00
segment.c
mips: kernel: no need to check return value of debugfs_create functions
2019-01-22 11:17:20 -08:00
setup.c
MIPS: Don't round up kernel sections size for memblock_add()
2020-12-30 11:51:18 +01:00
signal32.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
signal_n32.c
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
signal_o32.c
signal: Remove task parameter from force_sig
2019-05-27 09:36:28 -05:00
signal-common.h
MIPS: Save MSA extended context around signals
2015-09-03 12:07:59 +02:00
signal.c
signal: Remove task parameter from force_sig
2019-05-27 09:36:28 -05:00
smp-bmips.c
MIPS: BMIPS: Also call bmips_cpu_setup() for secondary cores
2020-09-09 19:12:24 +02:00
smp-cmp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 182
2019-05-30 11:29:20 -07:00
smp-cps.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
smp-mt.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 182
2019-05-30 11:29:20 -07:00
smp-up.c
MIPS: SMP: Allow boot_secondary SMP op to return errors
2017-08-30 00:57:27 +02:00
smp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
spinlock_test.c
mips: kernel: no need to check return value of debugfs_create functions
2019-01-22 11:17:20 -08:00
spram.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
stacktrace.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
sync-r4k.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
syscall.c
MIPS: Wire up clone3 syscall
2019-10-02 14:06:41 -07:00
sysrq.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
time.c
mips: Add udelay lpj numbers adjustment
2020-06-22 09:31:07 +02:00
topology.c
MIPS: CPU#0 is not hotpluggable
2020-08-21 13:05:26 +02:00
traps.c
MIPS: add missing MSACSR and upper MSA initialization
2020-09-09 19:12:28 +02:00
unaligned.c
signal: Remove task parameter from force_sig
2019-05-27 09:36:28 -05:00
uprobes.c
MIPS: uprobes: remove set but not used variable 'epc'
2019-05-29 13:20:30 -07:00
vdso.c
mips: Add support for generic vDSO
2019-07-25 21:45:05 -07:00
vmlinux.lds.S
MIPS: Truncate link address into 32bit for 32bit kernel
2020-06-22 09:31:03 +02:00
vpe-cmp.c
…
vpe-mt.c
…
vpe.c
MIPS: VPE: Fix a double free and a memory leak in 'release_vpe()'
2020-03-05 16:43:45 +01:00
watch.c
mips: annotate implicit fall throughs
2018-12-03 13:42:38 -08:00