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hotfixes for 5.18-rc7

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Merge tag 'mm-hotfixes-stable-2022-05-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "Seven MM fixes, three of which address issues added in the most recent
  merge window, four of which are cc:stable.

  Three non-MM fixes, none very serious"

[ And yes, that's a real pull request from Andrew, not me creating a
  branch from emailed patches. Woo-hoo! ]

* tag 'mm-hotfixes-stable-2022-05-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  MAINTAINERS: add a mailing list for DAMON development
  selftests: vm: Makefile: rename TARGETS to VMTARGETS
  mm/kfence: reset PG_slab and memcg_data before freeing __kfence_pool
  mailmap: add entry for martyna.szapar-mudlaw@intel.com
  arm[64]/memremap: don't abuse pfn_valid() to ensure presence of linear map
  procfs: prevent unprivileged processes accessing fdinfo dir
  mm: mremap: fix sign for EFAULT error return value
  mm/hwpoison: use pr_err() instead of dump_page() in get_any_page()
  mm/huge_memory: do not overkill when splitting huge_zero_page
  Revert "mm/memory-failure.c: skip huge_zero_page in memory_failure()"
This commit is contained in:
Linus Torvalds 2022-05-13 10:22:37 -07:00
commit 364a453ab9
12 changed files with 70 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.mailmap
View File

@ -251,6 +251,7 @@ Mark Yao <markyao0591@gmail.com> <mark.yao@rock-chips.com>
Martin Kepplinger <martink@posteo.de> <martin.kepplinger@ginzinger.com>
Martin Kepplinger <martink@posteo.de> <martin.kepplinger@puri.sm>
Martin Kepplinger <martink@posteo.de> <martin.kepplinger@theobroma-systems.com>
Martyna Szapar-Mudlaw <martyna.szapar-mudlaw@linux.intel.com> <martyna.szapar-mudlaw@intel.com>
Mathieu Othacehe <m.othacehe@gmail.com>
Matthew Wilcox <willy@infradead.org> <matthew.r.wilcox@intel.com>
Matthew Wilcox <willy@infradead.org> <matthew@wil.cx>

1
MAINTAINERS
View File

@ -5440,6 +5440,7 @@ F: net/ax25/sysctl_net_ax25.c
DATA ACCESS MONITOR
M: SeongJae Park <sj@kernel.org>
L: damon@lists.linux.dev
L: linux-mm@kvack.org
S: Maintained
F: Documentation/ABI/testing/sysfs-kernel-mm-damon

3
arch/arm/include/asm/io.h
View File

@ -440,6 +440,9 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
extern int valid_phys_addr_range(phys_addr_t addr, size_t size);
extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
extern bool arch_memremap_can_ram_remap(resource_size_t offset, size_t size,
unsigned long flags);
#define arch_memremap_can_ram_remap arch_memremap_can_ram_remap
#endif
/*

8
arch/arm/mm/ioremap.c
View File

@ -493,3 +493,11 @@ void __init early_ioremap_init(void)
{
early_ioremap_setup();
}
bool arch_memremap_can_ram_remap(resource_size_t offset, size_t size,
unsigned long flags)
{
unsigned long pfn = PHYS_PFN(offset);
return memblock_is_map_memory(pfn);
}

4
arch/arm64/include/asm/io.h
View File

@ -192,4 +192,8 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
extern int valid_phys_addr_range(phys_addr_t addr, size_t size);
extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
extern bool arch_memremap_can_ram_remap(resource_size_t offset, size_t size,
unsigned long flags);
#define arch_memremap_can_ram_remap arch_memremap_can_ram_remap
#endif /* __ASM_IO_H */

8
arch/arm64/mm/ioremap.c
View File

@ -99,3 +99,11 @@ void __init early_ioremap_init(void)
{
early_ioremap_setup();
}
bool arch_memremap_can_ram_remap(resource_size_t offset, size_t size,
unsigned long flags)
{
unsigned long pfn = PHYS_PFN(offset);
return pfn_is_map_memory(pfn);
}

23
fs/proc/fd.c
View File

@ -72,7 +72,7 @@ static int seq_show(struct seq_file *m, void *v)
return 0;
}
static int seq_fdinfo_open(struct inode *inode, struct file *file)
static int proc_fdinfo_access_allowed(struct inode *inode)
{
bool allowed = false;
struct task_struct *task = get_proc_task(inode);
@ -86,6 +86,16 @@ static int seq_fdinfo_open(struct inode *inode, struct file *file)
if (!allowed)
return -EACCES;
return 0;
}
static int seq_fdinfo_open(struct inode *inode, struct file *file)
{
int ret = proc_fdinfo_access_allowed(inode);
if (ret)
return ret;
return single_open(file, seq_show, inode);
}
@ -348,12 +358,23 @@ static int proc_readfdinfo(struct file *file, struct dir_context *ctx)
proc_fdinfo_instantiate);
}
static int proc_open_fdinfo(struct inode *inode, struct file *file)
{
int ret = proc_fdinfo_access_allowed(inode);
if (ret)
return ret;
return 0;
}
const struct inode_operations proc_fdinfo_inode_operations = {
.lookup = proc_lookupfdinfo,
.setattr = proc_setattr,
};
const struct file_operations proc_fdinfo_operations = {
.open = proc_open_fdinfo,
.read = generic_read_dir,
.iterate_shared = proc_readfdinfo,
.llseek = generic_file_llseek,

7
mm/huge_memory.c
View File

@ -2495,11 +2495,16 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
struct address_space *mapping = NULL;
int extra_pins, ret;
pgoff_t end;
bool is_hzp;
VM_BUG_ON_PAGE(is_huge_zero_page(head), head);
VM_BUG_ON_PAGE(!PageLocked(head), head);
VM_BUG_ON_PAGE(!PageCompound(head), head);
is_hzp = is_huge_zero_page(head);
VM_WARN_ON_ONCE_PAGE(is_hzp, head);
if (is_hzp)
return -EBUSY;
if (PageWriteback(head))
return -EBUSY;

10
mm/kfence/core.c
View File

@ -621,6 +621,16 @@ static bool __init kfence_init_pool_early(void)
* fails for the first page, and therefore expect addr==__kfence_pool in
* most failure cases.
*/
for (char *p = (char *)addr; p < __kfence_pool + KFENCE_POOL_SIZE; p += PAGE_SIZE) {
struct slab *slab = virt_to_slab(p);
if (!slab)
continue;
#ifdef CONFIG_MEMCG
slab->memcg_data = 0;
#endif
__folio_clear_slab(slab_folio(slab));
}
memblock_free_late(__pa(addr), KFENCE_POOL_SIZE - (addr - (unsigned long)__kfence_pool));
__kfence_pool = NULL;
return false;

15
mm/memory-failure.c
View File

@ -1274,7 +1274,7 @@ static int get_any_page(struct page *p, unsigned long flags)
}
out:
if (ret == -EIO)
dump_page(p, "hwpoison: unhandlable page");
pr_err("Memory failure: %#lx: unhandlable page.\n", page_to_pfn(p));
return ret;
}
@ -1860,19 +1860,6 @@ int memory_failure(unsigned long pfn, int flags)
}
if (PageTransHuge(hpage)) {
/*
* Bail out before SetPageHasHWPoisoned() if hpage is
* huge_zero_page, although PG_has_hwpoisoned is not
* checked in set_huge_zero_page().
*
* TODO: Handle memory failure of huge_zero_page thoroughly.
*/
if (is_huge_zero_page(hpage)) {
action_result(pfn, MF_MSG_UNSPLIT_THP, MF_IGNORED);
res = -EBUSY;
goto unlock_mutex;
}
/*
* The flag must be set after the refcount is bumped
* otherwise it may race with THP split.

2
mm/mremap.c
View File

@ -947,7 +947,7 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
return -EINTR;
vma = vma_lookup(mm, addr);
if (!vma) {
ret = EFAULT;
ret = -EFAULT;
goto out;
}

10
tools/testing/selftests/vm/Makefile
View File

@ -57,9 +57,9 @@ CAN_BUILD_I386 := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_32bit_prog
CAN_BUILD_X86_64 := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_64bit_program.c)
CAN_BUILD_WITH_NOPIE := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_program.c -no-pie)
TARGETS := protection_keys
BINARIES_32 := $(TARGETS:%=%_32)
BINARIES_64 := $(TARGETS:%=%_64)
VMTARGETS := protection_keys
BINARIES_32 := $(VMTARGETS:%=%_32)
BINARIES_64 := $(VMTARGETS:%=%_64)
ifeq ($(CAN_BUILD_WITH_NOPIE),1)
CFLAGS += -no-pie
@ -112,7 +112,7 @@ $(BINARIES_32): CFLAGS += -m32 -mxsave
$(BINARIES_32): LDLIBS += -lrt -ldl -lm
$(BINARIES_32): $(OUTPUT)/%_32: %.c
$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(notdir $^) $(LDLIBS) -o $@
$(foreach t,$(TARGETS),$(eval $(call gen-target-rule-32,$(t))))
$(foreach t,$(VMTARGETS),$(eval $(call gen-target-rule-32,$(t))))
endif
ifeq ($(CAN_BUILD_X86_64),1)
@ -120,7 +120,7 @@ $(BINARIES_64): CFLAGS += -m64 -mxsave
$(BINARIES_64): LDLIBS += -lrt -ldl
$(BINARIES_64): $(OUTPUT)/%_64: %.c
$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(notdir $^) $(LDLIBS) -o $@
$(foreach t,$(TARGETS),$(eval $(call gen-target-rule-64,$(t))))
$(foreach t,$(VMTARGETS),$(eval $(call gen-target-rule-64,$(t))))
endif
# x86_64 users should be encouraged to install 32-bit libraries