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Merge branch 'akpm' (patches from Andrew)

Browse Source 
Merge misc fixes from Andrew Morton:
 "14 patches.

  Subsystems affected by this patch series: mm (kasan, gup, pagecache,
  and kfence), MAINTAINERS, mailmap, nds32, gcov, ocfs2, ia64, and lib"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  lib: fix kconfig dependency on ARCH_WANT_FRAME_POINTERS
  kfence, x86: fix preemptible warning on KPTI-enabled systems
  lib/test_kasan_module.c: suppress unused var warning
  kasan: fix conflict with page poisoning
  fs: direct-io: fix missing sdio->boundary
  ia64: fix user_stack_pointer() for ptrace()
  ocfs2: fix deadlock between setattr and dio_end_io_write
  gcov: re-fix clang-11+ support
  nds32: flush_dcache_page: use page_mapping_file to avoid races with swapoff
  mm/gup: check page posion status for coredump.
  .mailmap: fix old email addresses
  mailmap: update email address for Jordan Crouse
  treewide: change my e-mail address, fix my name
  MAINTAINERS: update CZ.NIC's Turris information
This commit is contained in:
Linus Torvalds 2021-04-09 17:06:32 -07:00
commit adb2c4174f
30 changed files with 114 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
.mailmap
View File

@ -168,6 +168,7 @@ Johan Hovold <johan@kernel.org> <jhovold@gmail.com>
Johan Hovold <johan@kernel.org> <johan@hovoldconsulting.com>
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
John Stultz <johnstul@us.ibm.com>
Jordan Crouse <jordan@cosmicpenguin.net> <jcrouse@codeaurora.org>
<josh@joshtriplett.org> <josh@freedesktop.org>
<josh@joshtriplett.org> <josh@kernel.org>
<josh@joshtriplett.org> <josht@linux.vnet.ibm.com>
@ -253,8 +254,14 @@ Morten Welinder <welinder@anemone.rentec.com>
Morten Welinder <welinder@darter.rentec.com>
Morten Welinder <welinder@troll.com>
Mythri P K <mythripk@ti.com>
Nadia Yvette Chambers <nyc@holomorphy.com> William Lee Irwin III <wli@holomorphy.com>
Nathan Chancellor <nathan@kernel.org> <natechancellor@gmail.com>
Nguyen Anh Quynh <aquynh@gmail.com>
Nicholas Piggin <npiggin@gmail.com> <npiggen@suse.de>
Nicholas Piggin <npiggin@gmail.com> <npiggin@kernel.dk>
Nicholas Piggin <npiggin@gmail.com> <npiggin@suse.de>
Nicholas Piggin <npiggin@gmail.com> <nickpiggin@yahoo.com.au>
Nicholas Piggin <npiggin@gmail.com> <piggin@cyberone.com.au>
Nicolas Ferre <nicolas.ferre@microchip.com> <nicolas.ferre@atmel.com>
Nicolas Pitre <nico@fluxnic.net> <nicolas.pitre@linaro.org>
Nicolas Pitre <nico@fluxnic.net> <nico@linaro.org>

4
Documentation/ABI/testing/debugfs-moxtet
View File

@ -1,7 +1,7 @@
What: /sys/kernel/debug/moxtet/input
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) Read input from the shift registers, in hexadecimal.
Returns N+1 bytes, where N is the number of Moxtet connected
modules. The first byte is from the CPU board itself.
@ -19,7 +19,7 @@ Description: (Read) Read input from the shift registers, in hexadecimal.
What: /sys/kernel/debug/moxtet/output
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (RW) Read last written value to the shift registers, in
hexadecimal, or write values to the shift registers, also
in hexadecimal.

2
Documentation/ABI/testing/debugfs-turris-mox-rwtm
View File

@ -1,7 +1,7 @@
What: /sys/kernel/debug/turris-mox-rwtm/do_sign
Date: Jun 2020
KernelVersion: 5.8
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description:
======= ===========================================================

6
Documentation/ABI/testing/sysfs-bus-moxtet-devices
View File

@ -1,17 +1,17 @@
What: /sys/bus/moxtet/devices/moxtet-<name>.<addr>/module_description
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) Moxtet module description. Format: string
What: /sys/bus/moxtet/devices/moxtet-<name>.<addr>/module_id
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) Moxtet module ID. Format: %x
What: /sys/bus/moxtet/devices/moxtet-<name>.<addr>/module_name
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) Moxtet module name. Format: string

2
Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
View File

@ -1,7 +1,7 @@
What: /sys/class/leds/<led>/device/brightness
Date: July 2020
KernelVersion: 5.9
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (RW) On the front panel of the Turris Omnia router there is also
a button which can be used to control the intensity of all the
LEDs at once, so that if they are too bright, user can dim them.

10
Documentation/ABI/testing/sysfs-firmware-turris-mox-rwtm
View File

@ -1,21 +1,21 @@
What: /sys/firmware/turris-mox-rwtm/board_version
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) Board version burned into eFuses of this Turris Mox board.
Format: %i
What: /sys/firmware/turris-mox-rwtm/mac_address*
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) MAC addresses burned into eFuses of this Turris Mox board.
Format: %pM
What: /sys/firmware/turris-mox-rwtm/pubkey
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) ECDSA public key (in pubkey hex compressed form) computed
as pair to the ECDSA private key burned into eFuses of this
Turris Mox Board.
@ -24,7 +24,7 @@ Description: (Read) ECDSA public key (in pubkey hex compressed form) computed
What: /sys/firmware/turris-mox-rwtm/ram_size
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) RAM size in MiB of this Turris Mox board as was detected
during manufacturing and burned into eFuses. Can be 512 or 1024.
Format: %i
@ -32,6 +32,6 @@ Description: (Read) RAM size in MiB of this Turris Mox board as was detected
What: /sys/firmware/turris-mox-rwtm/serial_number
Date: August 2019
KernelVersion: 5.4
Contact: Marek Behún <marek.behun@nic.cz>
Contact: Marek Behún <kabel@kernel.org>
Description: (Read) Serial number burned into eFuses of this Turris Mox device.
Format: %016X

2
Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml
View File

@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
title: CZ.NIC's Turris Omnia LEDs driver
maintainers:
- Marek Behún <marek.behun@nic.cz>
- Marek Behún <kabel@kernel.org>
description:
This module adds support for the RGB LEDs found on the front panel of the

13
MAINTAINERS
View File

@ -1790,19 +1790,26 @@ F: drivers/net/ethernet/cortina/
F: drivers/pinctrl/pinctrl-gemini.c
F: drivers/rtc/rtc-ftrtc010.c
ARM/CZ.NIC TURRIS MOX SUPPORT
M: Marek Behun <marek.behun@nic.cz>
ARM/CZ.NIC TURRIS SUPPORT
M: Marek Behun <kabel@kernel.org>
S: Maintained
W: http://mox.turris.cz
W: https://www.turris.cz/
F: Documentation/ABI/testing/debugfs-moxtet
F: Documentation/ABI/testing/sysfs-bus-moxtet-devices
F: Documentation/ABI/testing/sysfs-firmware-turris-mox-rwtm
F: Documentation/devicetree/bindings/bus/moxtet.txt
F: Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt
F: Documentation/devicetree/bindings/gpio/gpio-moxtet.txt
F: Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml
F: Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt
F: drivers/bus/moxtet.c
F: drivers/firmware/turris-mox-rwtm.c
F: drivers/leds/leds-turris-omnia.c
F: drivers/mailbox/armada-37xx-rwtm-mailbox.c
F: drivers/gpio/gpio-moxtet.c
F: drivers/watchdog/armada_37xx_wdt.c
F: include/dt-bindings/bus/moxtet.h
F: include/linux/armada-37xx-rwtm-mailbox.h
F: include/linux/moxtet.h
ARM/EZX SMARTPHONES (A780, A910, A1200, E680, ROKR E2 and ROKR E6)

2
arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
View File

@ -1,7 +1,7 @@
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Device Tree file for CZ.NIC Turris Mox Board
* 2019 by Marek Behun <marek.behun@nic.cz>
* 2019 by Marek Behún <kabel@kernel.org>
*/
/dts-v1/;

8
arch/ia64/include/asm/ptrace.h
View File

@ -54,8 +54,7 @@
static inline unsigned long user_stack_pointer(struct pt_regs *regs)
{
/* FIXME: should this be bspstore + nr_dirty regs? */
return regs->ar_bspstore;
return regs->r12;
}
static inline int is_syscall_success(struct pt_regs *regs)
@ -79,11 +78,6 @@ static inline long regs_return_value(struct pt_regs *regs)
unsigned long __ip = instruction_pointer(regs); \
(__ip & ~3UL) + ((__ip & 3UL) << 2); \
})
/*
* Why not default? Because user_stack_pointer() on ia64 gives register
* stack backing store instead...
*/
#define current_user_stack_pointer() (current_pt_regs()->r12)
/* given a pointer to a task_struct, return the user's pt_regs */
# define task_pt_regs(t) (((struct pt_regs *) ((char *) (t) + IA64_STK_OFFSET)) - 1)

2
arch/nds32/mm/cacheflush.c
View File

@ -238,7 +238,7 @@ void flush_dcache_page(struct page *page)
{
struct address_space *mapping;
mapping = page_mapping(page);
mapping = page_mapping_file(page);
if (mapping && !mapping_mapped(mapping))
set_bit(PG_dcache_dirty, &page->flags);
else {

7
arch/x86/include/asm/kfence.h
View File

@ -56,8 +56,13 @@ static inline bool kfence_protect_page(unsigned long addr, bool protect)
else
set_pte(pte, __pte(pte_val(*pte) | _PAGE_PRESENT));
/* Flush this CPU's TLB. */
/*
* Flush this CPU's TLB, assuming whoever did the allocation/free is
* likely to continue running on this CPU.
*/
preempt_disable();
flush_tlb_one_kernel(addr);
preempt_enable();
return true;
}

4
drivers/bus/moxtet.c
View File

@ -2,7 +2,7 @@
/*
* Turris Mox module configuration bus driver
*
* Copyright (C) 2019 Marek Behun <marek.behun@nic.cz>
* Copyright (C) 2019 Marek Behún <kabel@kernel.org>
*/
#include <dt-bindings/bus/moxtet.h>
@ -879,6 +879,6 @@ static void __exit moxtet_exit(void)
}
module_exit(moxtet_exit);
MODULE_AUTHOR("Marek Behun <marek.behun@nic.cz>");
MODULE_AUTHOR("Marek Behun <kabel@kernel.org>");
MODULE_DESCRIPTION("CZ.NIC's Turris Mox module configuration bus");
MODULE_LICENSE("GPL v2");

4
drivers/firmware/turris-mox-rwtm.c
View File

@ -2,7 +2,7 @@
/*
* Turris Mox rWTM firmware driver
*
* Copyright (C) 2019 Marek Behun <marek.behun@nic.cz>
* Copyright (C) 2019 Marek Behún <kabel@kernel.org>
*/
#include <linux/armada-37xx-rwtm-mailbox.h>
@ -547,4 +547,4 @@ module_platform_driver(turris_mox_rwtm_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Turris Mox rWTM firmware driver");
MODULE_AUTHOR("Marek Behun <marek.behun@nic.cz>");
MODULE_AUTHOR("Marek Behun <kabel@kernel.org>");

4
drivers/gpio/gpio-moxtet.c
View File

@ -2,7 +2,7 @@
/*
* Turris Mox Moxtet GPIO expander
*
* Copyright (C) 2018 Marek Behun <marek.behun@nic.cz>
* Copyright (C) 2018 Marek Behún <kabel@kernel.org>
*/
#include <linux/bitops.h>
@ -174,6 +174,6 @@ static struct moxtet_driver moxtet_gpio_driver = {
};
module_moxtet_driver(moxtet_gpio_driver);
MODULE_AUTHOR("Marek Behun <marek.behun@nic.cz>");
MODULE_AUTHOR("Marek Behun <kabel@kernel.org>");
MODULE_DESCRIPTION("Turris Mox Moxtet GPIO expander");
MODULE_LICENSE("GPL v2");

4
drivers/leds/leds-turris-omnia.c
View File

@ -2,7 +2,7 @@
/*
* CZ.NIC's Turris Omnia LEDs driver
*
* 2020 by Marek Behun <marek.behun@nic.cz>
* 2020 by Marek Behún <kabel@kernel.org>
*/
#include <linux/i2c.h>
@ -287,6 +287,6 @@ static struct i2c_driver omnia_leds_driver = {
module_i2c_driver(omnia_leds_driver);
MODULE_AUTHOR("Marek Behun <marek.behun@nic.cz>");
MODULE_AUTHOR("Marek Behun <kabel@kernel.org>");
MODULE_DESCRIPTION("CZ.NIC's Turris Omnia LEDs");
MODULE_LICENSE("GPL v2");

4
drivers/mailbox/armada-37xx-rwtm-mailbox.c
View File

@ -2,7 +2,7 @@
/*
* rWTM BIU Mailbox driver for Armada 37xx
*
* Author: Marek Behun <marek.behun@nic.cz>
* Author: Marek Behún <kabel@kernel.org>
*/
#include <linux/device.h>
@ -203,4 +203,4 @@ module_platform_driver(armada_37xx_mbox_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("rWTM BIU Mailbox driver for Armada 37xx");
MODULE_AUTHOR("Marek Behun <marek.behun@nic.cz>");
MODULE_AUTHOR("Marek Behun <kabel@kernel.org>");

4
drivers/watchdog/armada_37xx_wdt.c
View File

@ -2,7 +2,7 @@
/*
* Watchdog driver for Marvell Armada 37xx SoCs
*
* Author: Marek Behun <marek.behun@nic.cz>
* Author: Marek Behún <kabel@kernel.org>
*/
#include <linux/clk.h>
@ -366,7 +366,7 @@ static struct platform_driver armada_37xx_wdt_driver = {
module_platform_driver(armada_37xx_wdt_driver);
MODULE_AUTHOR("Marek Behun <marek.behun@nic.cz>");
MODULE_AUTHOR("Marek Behun <kabel@kernel.org>");
MODULE_DESCRIPTION("Armada 37xx CPU Watchdog");
MODULE_LICENSE("GPL v2");

5
fs/direct-io.c
View File

@ -812,6 +812,7 @@ submit_page_section(struct dio *dio, struct dio_submit *sdio, struct page *page,
struct buffer_head *map_bh)
{
int ret = 0;
int boundary = sdio->boundary; /* dio_send_cur_page may clear it */
if (dio->op == REQ_OP_WRITE) {
/*
@ -850,10 +851,10 @@ submit_page_section(struct dio *dio, struct dio_submit *sdio, struct page *page,
sdio->cur_page_fs_offset = sdio->block_in_file << sdio->blkbits;
out:
/*
* If sdio->boundary then we want to schedule the IO now to
* If boundary then we want to schedule the IO now to
* avoid metadata seeks.
*/
if (sdio->boundary) {
if (boundary) {
ret = dio_send_cur_page(dio, sdio, map_bh);
if (sdio->bio)
dio_bio_submit(dio, sdio);

11
fs/ocfs2/aops.c
View File

@ -2295,7 +2295,7 @@ static int ocfs2_dio_end_io_write(struct inode *inode,
struct ocfs2_alloc_context *meta_ac = NULL;
handle_t *handle = NULL;
loff_t end = offset + bytes;
int ret = 0, credits = 0, locked = 0;
int ret = 0, credits = 0;
ocfs2_init_dealloc_ctxt(&dealloc);
@ -2306,13 +2306,6 @@ static int ocfs2_dio_end_io_write(struct inode *inode,
!dwc->dw_orphaned)
goto out;
/* ocfs2_file_write_iter will get i_mutex, so we need not lock if we
* are in that context. */
if (dwc->dw_writer_pid != task_pid_nr(current)) {
inode_lock(inode);
locked = 1;
}
ret = ocfs2_inode_lock(inode, &di_bh, 1);
if (ret < 0) {
mlog_errno(ret);
@ -2393,8 +2386,6 @@ out:
if (meta_ac)
ocfs2_free_alloc_context(meta_ac);
ocfs2_run_deallocs(osb, &dealloc);
if (locked)
inode_unlock(inode);
ocfs2_dio_free_write_ctx(inode, dwc);
return ret;

8
fs/ocfs2/file.c
View File

@ -1245,22 +1245,24 @@ int ocfs2_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
goto bail_unlock;
}
}
down_write(&OCFS2_I(inode)->ip_alloc_sem);
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS +
2 * ocfs2_quota_trans_credits(sb));
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto bail_unlock;
goto bail_unlock_alloc;
}
status = __dquot_transfer(inode, transfer_to);
if (status < 0)
goto bail_commit;
} else {
down_write(&OCFS2_I(inode)->ip_alloc_sem);
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto bail_unlock;
goto bail_unlock_alloc;
}
}
@ -1273,6 +1275,8 @@ int ocfs2_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
bail_commit:
ocfs2_commit_trans(osb, handle);
bail_unlock_alloc:
up_write(&OCFS2_I(inode)->ip_alloc_sem);
bail_unlock:
if (status && inode_locked) {
ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);

2
include/dt-bindings/bus/moxtet.h
View File

@ -2,7 +2,7 @@
/*
* Constant for device tree bindings for Turris Mox module configuration bus
*
* Copyright (C) 2019 Marek Behun <marek.behun@nic.cz>
* Copyright (C) 2019 Marek Behún <kabel@kernel.org>
*/
#ifndef _DT_BINDINGS_BUS_MOXTET_H

2
include/linux/armada-37xx-rwtm-mailbox.h
View File

@ -2,7 +2,7 @@
/*
* rWTM BIU Mailbox driver for Armada 37xx
*
* Author: Marek Behun <marek.behun@nic.cz>
* Author: Marek Behún <kabel@kernel.org>
*/
#ifndef _LINUX_ARMADA_37XX_RWTM_MAILBOX_H_

2
include/linux/moxtet.h
View File

@ -2,7 +2,7 @@
/*
* Turris Mox module configuration bus driver
*
* Copyright (C) 2019 Marek Behun <marek.behun@nic.cz>
* Copyright (C) 2019 Marek Behún <kabel@kernel.org>
*/
#ifndef __LINUX_MOXTET_H

29
kernel/gcov/clang.c
View File

@ -70,7 +70,9 @@ struct gcov_fn_info {
u32 ident;
u32 checksum;
#if CONFIG_CLANG_VERSION < 110000
u8 use_extra_checksum;
#endif
u32 cfg_checksum;
u32 num_counters;
@ -145,10 +147,8 @@ void llvm_gcda_emit_function(u32 ident, const char *function_name,
list_add_tail(&info->head, &current_info->functions);
}
EXPORT_SYMBOL(llvm_gcda_emit_function);
#else
void llvm_gcda_emit_function(u32 ident, u32 func_checksum,
u8 use_extra_checksum, u32 cfg_checksum)
void llvm_gcda_emit_function(u32 ident, u32 func_checksum, u32 cfg_checksum)
{
struct gcov_fn_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
@ -158,12 +158,11 @@ void llvm_gcda_emit_function(u32 ident, u32 func_checksum,
INIT_LIST_HEAD(&info->head);
info->ident = ident;
info->checksum = func_checksum;
info->use_extra_checksum = use_extra_checksum;
info->cfg_checksum = cfg_checksum;
list_add_tail(&info->head, &current_info->functions);
}
EXPORT_SYMBOL(llvm_gcda_emit_function);
#endif
EXPORT_SYMBOL(llvm_gcda_emit_function);
void llvm_gcda_emit_arcs(u32 num_counters, u64 *counters)
{
@ -293,11 +292,16 @@ int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2)
!list_is_last(&fn_ptr2->head, &info2->functions)) {
if (fn_ptr1->checksum != fn_ptr2->checksum)
return false;
#if CONFIG_CLANG_VERSION < 110000
if (fn_ptr1->use_extra_checksum != fn_ptr2->use_extra_checksum)
return false;
if (fn_ptr1->use_extra_checksum &&
fn_ptr1->cfg_checksum != fn_ptr2->cfg_checksum)
return false;
#else
if (fn_ptr1->cfg_checksum != fn_ptr2->cfg_checksum)
return false;
#endif
fn_ptr1 = list_next_entry(fn_ptr1, head);
fn_ptr2 = list_next_entry(fn_ptr2, head);
}
@ -529,17 +533,22 @@ static size_t convert_to_gcda(char *buffer, struct gcov_info *info)
list_for_each_entry(fi_ptr, &info->functions, head) {
u32 i;
u32 len = 2;
if (fi_ptr->use_extra_checksum)
len++;
pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION);
pos += store_gcov_u32(buffer, pos, len);
#if CONFIG_CLANG_VERSION < 110000
pos += store_gcov_u32(buffer, pos,
fi_ptr->use_extra_checksum ? 3 : 2);
#else
pos += store_gcov_u32(buffer, pos, 3);
#endif
pos += store_gcov_u32(buffer, pos, fi_ptr->ident);
pos += store_gcov_u32(buffer, pos, fi_ptr->checksum);
#if CONFIG_CLANG_VERSION < 110000
if (fi_ptr->use_extra_checksum)
pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum);
#else
pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum);
#endif
pos += store_gcov_u32(buffer, pos, GCOV_TAG_COUNTER_BASE);
pos += store_gcov_u32(buffer, pos, fi_ptr->num_counters * 2);

6
lib/Kconfig.debug
View File

@ -1363,7 +1363,7 @@ config LOCKDEP
bool
depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
select STACKTRACE
select FRAME_POINTER if !MIPS && !PPC && !ARM && !S390 && !MICROBLAZE && !ARC && !X86
depends on FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86
select KALLSYMS
select KALLSYMS_ALL
@ -1665,7 +1665,7 @@ config LATENCYTOP
depends on DEBUG_KERNEL
depends on STACKTRACE_SUPPORT
depends on PROC_FS
select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
depends on FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86
select KALLSYMS
select KALLSYMS_ALL
select STACKTRACE
@ -1918,7 +1918,7 @@ config FAULT_INJECTION_STACKTRACE_FILTER
depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
depends on !X86_64
select STACKTRACE
select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
depends on FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86
help
Provide stacktrace filter for fault-injection capabilities

2
lib/test_kasan_module.c
View File

@ -22,7 +22,7 @@ static noinline void __init copy_user_test(void)
char *kmem;
char __user *usermem;
size_t size = 10;
int unused;
int __maybe_unused unused;
kmem = kmalloc(size, GFP_KERNEL);
if (!kmem)

4
mm/gup.c
View File

@ -1535,6 +1535,10 @@ struct page *get_dump_page(unsigned long addr)
FOLL_FORCE | FOLL_DUMP | FOLL_GET);
if (locked)
mmap_read_unlock(mm);
if (ret == 1 && is_page_poisoned(page))
return NULL;
return (ret == 1) ? page : NULL;
}
#endif /* CONFIG_ELF_CORE */

20
mm/internal.h
View File

@ -97,6 +97,26 @@ static inline void set_page_refcounted(struct page *page)
set_page_count(page, 1);
}
/*
* When kernel touch the user page, the user page may be have been marked
* poison but still mapped in user space, if without this page, the kernel
* can guarantee the data integrity and operation success, the kernel is
* better to check the posion status and avoid touching it, be good not to
* panic, coredump for process fatal signal is a sample case matching this
* scenario. Or if kernel can't guarantee the data integrity, it's better
* not to call this function, let kernel touch the poison page and get to
* panic.
*/
static inline bool is_page_poisoned(struct page *page)
{
if (PageHWPoison(page))
return true;
else if (PageHuge(page) && PageHWPoison(compound_head(page)))
return true;
return false;
}
extern unsigned long highest_memmap_pfn;
/*

4
mm/page_poison.c
View File

@ -77,12 +77,14 @@ static void unpoison_page(struct page *page)
void *addr;
addr = kmap_atomic(page);
kasan_disable_current();
/*
* Page poisoning when enabled poisons each and every page
* that is freed to buddy. Thus no extra check is done to
* see if a page was poisoned.
*/
check_poison_mem(addr, PAGE_SIZE);
check_poison_mem(kasan_reset_tag(addr), PAGE_SIZE);
kasan_enable_current();
kunmap_atomic(addr);
}