Joerg Roedel de2b41be8f x86, vmlinux.lds: Page-align end of ..page_aligned sections ... On x86-32 the idt_table with 256 entries needs only 2048 bytes. It is page-aligned, but the end of the .bss..page_aligned section is not guaranteed to be page-aligned. As a result, objects from other .bss sections may end up on the same 4k page as the idt_table, and will accidentially get mapped read-only during boot, causing unexpected page-faults when the kernel writes to them. This could be worked around by making the objects in the page aligned sections page sized, but that's wrong. Explicit sections which store only page aligned objects have an implicit guarantee that the object is alone in the page in which it is placed. That works for all objects except the last one. That's inconsistent. Enforcing page sized objects for these sections would wreckage memory sanitizers, because the object becomes artificially larger than it should be and out of bound access becomes legit. Align the end of the .bss..page_aligned and .data..page_aligned section on page-size so all objects places in these sections are guaranteed to have their own page. [ tglx: Amended changelog ] Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20200721093448.10417-1-joro@8bytes.org		2020-07-22 09:38:37 +02:00
..
bitops	asm-generic, kcsan: Add KCSAN instrumentation for bitops	2020-03-21 09:41:46 +01:00
vdso	lib/vdso: Avoid highres update if clocksource is not VDSO capable	2020-02-17 20:12:17 +01:00
asm-offsets.h
asm-prototypes.h
atomic64.h	locking/atomic: Use s64 for atomic64	2019-06-03 12:32:56 +02:00
atomic-instrumented.h	asm-generic, atomic-instrumented: Use generic instrumented.h	2020-03-21 09:41:42 +01:00
atomic-long.h	asm-generic/atomic: Use __always_inline for pure wrappers	2020-01-07 07:47:23 -08:00
atomic.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36	2019-05-24 17:27:11 +02:00
audit_change_attr.h
audit_dir_write.h
audit_read.h
audit_signal.h
audit_write.h
barrier.h	locking/barriers: Use '__unqual_scalar_typeof' for load-acquire macros	2020-04-16 12:28:34 +01:00
bitops.h	asm-generic/bitops: Update stale comment	2020-03-06 11:06:19 +01:00
bitsperlong.h
bug.h	bug: Annotate WARN/BUG/stackfail as noinstr safe	2020-06-11 15:14:36 +02:00
bugs.h
cache.h
cacheflush.h	make asm-generic/cacheflush.h more standalone	2020-06-26 00:27:37 -07:00
checksum.h	take the dummy csum_and_copy_from_user() into net/checksum.h	2020-05-29 16:11:50 -04:00
cmpxchg-local.h
cmpxchg.h
compat.h	asm-generic: Move common compat types to asm-generic/compat.h	2018-08-29 15:42:20 +02:00
current.h
delay.h
device.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428	2019-06-05 17:37:16 +02:00
div64.h	asm-generic changes for v5.4	2019-09-17 14:30:30 -07:00
dma-contiguous.h
dma-mapping.h	dma-mapping: bypass indirect calls for dma-direct	2018-12-13 21:06:18 +01:00
dma.h
early_ioremap.h
emergency-restart.h
error-injection.h	error-injection: Consolidate override function definition	2019-08-07 13:52:43 +01:00
exec.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36	2019-05-24 17:27:11 +02:00
export.h	export.h: reduce __ksymtab_strings string duplication by using "MS" section flags	2019-12-16 10:35:33 +01:00
extable.h
fb.h
fixmap.h	mm: introduce common STRUCT_PAGE_MAX_SHIFT define	2018-12-14 15:05:45 -08:00
flat.h	binfmt_flat: remove the persistent argument from flat_get_addr_from_rp	2019-06-24 09:16:47 +10:00
ftrace.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
futex.h	generic arch_futex_atomic_op_inuser() doesn't need access_ok()	2020-03-27 23:58:55 -04:00
getorder.h	asm-generic: fix -Wtype-limits compiler warnings	2019-08-03 07:02:01 -07:00
gpio.h	gpio: Avoid kernel.h inclusion where it's possible	2020-02-10 12:58:36 +01:00
hardirq.h
hugetlb.h	mm: Allow arches to provide ptep_get()	2020-06-20 22:14:53 +10:00
hw_irq.h
hyperv-tlfs.h	ARM:	2020-06-03 15:13:47 -07:00
ide_iops.h
int-ll64.h	int-ll64.h: define u{8,16,32,64} and s{8,16,32,64} based on uapi header	2018-06-07 17:34:38 -07:00
io.h	mm: introduce include/linux/pgtable.h	2020-06-09 09:39:13 -07:00
ioctl.h
iomap.h	remove ioremap_nocache and devm_ioremap_nocache	2020-01-06 09:45:59 +01:00
irq_regs.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
irq_work.h
irq.h
irqflags.h
Kbuild	arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>	2020-04-23 10:50:26 +09:00
kdebug.h
kmap_types.h
kprobes.h
kvm_para.h
linkage.h
local64.h
local.h
mcs_spinlock.h
memory_model.h
mm_hooks.h	mm: remove arch_bprm_mm_init() hook	2020-01-23 10:41:16 -08:00
mm-arch-hooks.h
mmiowb_types.h	asm-generic/mmiowb: Add generic implementation of mmiowb() tracking	2019-04-08 11:59:39 +01:00
mmiowb.h	asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()	2020-07-17 10:02:03 +01:00
mmu_context.h
mmu.h
module.h
mshyperv.h	x86/Hyper-V: Report crash data in die() when panic_on_oops is set	2020-04-11 17:19:07 +01:00
msi.h
page.h	asm-generic/page.h: fix typo in #error text requiring a real asm/page.h	2019-02-22 21:53:25 +01:00
param.h
parport.h
pci_iomap.h
pci.h
percpu.h	percpu: fix __percpu annotation in asm-generic	2020-01-31 11:15:59 -08:00
pgalloc.h	mm: treewide: clarify pgtable_page_{ctor,dtor}() naming	2019-09-26 10:10:44 -07:00
pgtable_uffd.h	userfaultfd: wp: add pmd_swp_*uffd_wp() helpers	2020-04-07 10:43:39 -07:00
pgtable-nop4d.h	asm-generic/tlb: stub out p4d_free_tlb() if nop4d ...	2019-12-01 06:29:19 -08:00
pgtable-nopmd.h	mm: consolidate pte_index() and pte_offset_*() definitions	2020-06-09 09:39:14 -07:00
pgtable-nopud.h	mm: consolidate pte_index() and pte_offset_*() definitions	2020-06-09 09:39:14 -07:00
preempt.h	sched/preempt: Use CONFIG_PREEMPTION where appropriate	2019-07-31 19:03:34 +02:00
qrwlock_types.h
qrwlock.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
qspinlock_types.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
qspinlock.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
resource.h
seccomp.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
sections.h	vmlinux.lds.h: Create section for protection against instrumentation	2020-05-19 15:47:20 +02:00
serial.h
set_memory.h
shmparam.h	treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers	2019-05-14 19:52:48 -07:00
signal.h
simd.h
spinlock.h
statfs.h
string.h
switch_to.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36	2019-05-24 17:27:11 +02:00
syscall.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 193	2019-05-30 11:29:21 -07:00
syscalls.h
termios-base.h
termios.h
timex.h
tlb.h	mm/vma: replace all remaining open encodings with is_vm_hugetlb_page()	2020-04-07 10:43:37 -07:00
tlbflush.h
topology.h	include/asm-generic/topology.h: guard cpumask_of_node() macro argument	2020-05-28 11:35:41 -07:00
trace_clock.h
uaccess.h	asm-generic: optimize generic uaccess for 8-byte loads and stores	2019-04-23 21:51:41 +02:00
unaligned.h
user.h
vermagic.h	arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>	2020-04-23 10:50:26 +09:00
vga.h
vmlinux.lds.h	x86, vmlinux.lds: Page-align end of ..page_aligned sections	2020-07-22 09:38:37 +02:00
vtime.h
word-at-a-time.h
xor.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 47	2019-05-24 17:27:13 +02:00