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10 hotfixes, 7 of which are cc:stable. All singletons, please see the

Browse Source 
changelogs for details.
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Merge tag 'mm-hotfixes-stable-2024-11-16-15-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull hotfixes from Andrew Morton:
 "10 hotfixes, 7 of which are cc:stable. All singletons, please see the
  changelogs for details"

* tag 'mm-hotfixes-stable-2024-11-16-15-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  mm: revert "mm: shmem: fix data-race in shmem_getattr()"
  ocfs2: uncache inode which has failed entering the group
  mm: fix NULL pointer dereference in alloc_pages_bulk_noprof
  mm, doc: update read_ahead_kb for MADV_HUGEPAGE
  fs/proc/task_mmu: prevent integer overflow in pagemap_scan_get_args()
  sched/task_stack: fix object_is_on_stack() for KASAN tagged pointers
  crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32
  mm/mremap: fix address wraparound in move_page_tables()
  tools/mm: fix compile error
  mm, swap: fix allocation and scanning race with swapoff
This commit is contained in:
Linus Torvalds 2024-11-16 16:00:38 -08:00
commit 4a5df37964
19 changed files with 62 additions and 10 deletions
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3
Documentation/ABI/stable/sysfs-block
View File

@ -594,6 +594,9 @@ Description:
[RW] Maximum number of kilobytes to read-ahead for filesystems
on this block device.
For MADV_HUGEPAGE, the readahead size may exceed this setting
since its granularity is based on the hugepage size.
What: /sys/block/<disk>/queue/rotational
Date: January 2009

3
arch/arm/Kconfig
View File

@ -1598,6 +1598,9 @@ config ATAGS_PROC
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
config ARCH_DEFAULT_CRASH_DUMP
def_bool y
config AUTO_ZRELADDR
bool "Auto calculation of the decompressed kernel image address" if !ARCH_MULTIPLATFORM
default !(ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100)

3
arch/arm64/Kconfig
View File

@ -1576,6 +1576,9 @@ config ARCH_DEFAULT_KEXEC_IMAGE_VERIFY_SIG
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
config ARCH_DEFAULT_CRASH_DUMP
def_bool y
config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
def_bool CRASH_RESERVE

3
arch/loongarch/Kconfig
View File

@ -604,6 +604,9 @@ config ARCH_SUPPORTS_KEXEC
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
config ARCH_DEFAULT_CRASH_DUMP
def_bool y
config ARCH_SELECTS_CRASH_DUMP
def_bool y
depends on CRASH_DUMP

3
arch/mips/Kconfig
View File

@ -2876,6 +2876,9 @@ config ARCH_SUPPORTS_KEXEC
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
config ARCH_DEFAULT_CRASH_DUMP
def_bool y
config PHYSICAL_START
hex "Physical address where the kernel is loaded"
default "0xffffffff84000000"

4
arch/powerpc/Kconfig
View File

@ -684,6 +684,10 @@ config RELOCATABLE_TEST
config ARCH_SUPPORTS_CRASH_DUMP
def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
config ARCH_DEFAULT_CRASH_DUMP
bool
default y if !PPC_BOOK3S_32
config ARCH_SELECTS_CRASH_DUMP
def_bool y
depends on CRASH_DUMP

3
arch/riscv/Kconfig
View File

@ -898,6 +898,9 @@ config ARCH_SUPPORTS_KEXEC_PURGATORY
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
config ARCH_DEFAULT_CRASH_DUMP
def_bool y
config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
def_bool CRASH_RESERVE

3
arch/s390/Kconfig
View File

@ -276,6 +276,9 @@ config ARCH_SUPPORTS_CRASH_DUMP
This option also enables s390 zfcpdump.
See also <file:Documentation/arch/s390/zfcpdump.rst>
config ARCH_DEFAULT_CRASH_DUMP
def_bool y
menu "Processor type and features"
config HAVE_MARCH_Z10_FEATURES

3
arch/sh/Kconfig
View File

@ -550,6 +550,9 @@ config ARCH_SUPPORTS_KEXEC
config ARCH_SUPPORTS_CRASH_DUMP
def_bool BROKEN_ON_SMP
config ARCH_DEFAULT_CRASH_DUMP
def_bool y
config ARCH_SUPPORTS_KEXEC_JUMP
def_bool y

3
arch/x86/Kconfig
View File

@ -2084,6 +2084,9 @@ config ARCH_SUPPORTS_KEXEC_JUMP
config ARCH_SUPPORTS_CRASH_DUMP
def_bool X86_64 || (X86_32 && HIGHMEM)
config ARCH_DEFAULT_CRASH_DUMP
def_bool y
config ARCH_SUPPORTS_CRASH_HOTPLUG
def_bool y

2
fs/ocfs2/resize.c
View File

@ -574,6 +574,8 @@ int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
ocfs2_commit_trans(osb, handle);
out_free_group_bh:
if (ret < 0)
ocfs2_remove_from_cache(INODE_CACHE(inode), group_bh);
brelse(group_bh);
out_unlock:

4
fs/proc/task_mmu.c
View File

@ -2665,8 +2665,10 @@ static int pagemap_scan_get_args(struct pm_scan_arg *arg,
return -EFAULT;
if (!arg->vec && arg->vec_len)
return -EINVAL;
if (UINT_MAX == SIZE_MAX && arg->vec_len > SIZE_MAX)
return -EINVAL;
if (arg->vec && !access_ok((void __user *)(long)arg->vec,
arg->vec_len * sizeof(struct page_region)))
size_mul(arg->vec_len, sizeof(struct page_region))))
return -EFAULT;
/* Fixup default values */

2
include/linux/sched/task_stack.h
View File

@ -9,6 +9,7 @@
#include <linux/sched.h>
#include <linux/magic.h>
#include <linux/refcount.h>
#include <linux/kasan.h>
#ifdef CONFIG_THREAD_INFO_IN_TASK
@ -89,6 +90,7 @@ static inline int object_is_on_stack(const void *obj)
{
void *stack = task_stack_page(current);
obj = kasan_reset_tag(obj);
return (obj >= stack) && (obj < (stack + THREAD_SIZE));
}

2
kernel/Kconfig.kexec
View File

@ -97,7 +97,7 @@ config KEXEC_JUMP
config CRASH_DUMP
bool "kernel crash dumps"
default y
default ARCH_DEFAULT_CRASH_DUMP
depends on ARCH_SUPPORTS_CRASH_DUMP
depends on KEXEC_CORE
select VMCORE_INFO

2
mm/mremap.c
View File

@ -648,7 +648,7 @@ unsigned long move_page_tables(struct vm_area_struct *vma,
* Prevent negative return values when {old,new}_addr was realigned
* but we broke out of the above loop for the first PMD itself.
*/
if (len + old_addr < old_end)
if (old_addr < old_end - len)
return 0;
return len + old_addr - old_end; /* how much done */

3
mm/page_alloc.c
View File

@ -4607,7 +4607,8 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid,
gfp = alloc_gfp;
/* Find an allowed local zone that meets the low watermark. */
for_each_zone_zonelist_nodemask(zone, z, ac.zonelist, ac.highest_zoneidx, ac.nodemask) {
z = ac.preferred_zoneref;
for_next_zone_zonelist_nodemask(zone, z, ac.highest_zoneidx, ac.nodemask) {
unsigned long mark;
if (cpusets_enabled() && (alloc_flags & ALLOC_CPUSET) &&

2
mm/shmem.c
View File

@ -1166,9 +1166,7 @@ static int shmem_getattr(struct mnt_idmap *idmap,
stat->attributes_mask |= (STATX_ATTR_APPEND |
STATX_ATTR_IMMUTABLE |
STATX_ATTR_NODUMP);
inode_lock_shared(inode);
generic_fillattr(idmap, request_mask, inode, stat);
inode_unlock_shared(inode);
if (shmem_huge_global_enabled(inode, 0, 0, false, NULL, 0))
stat->blksize = HPAGE_PMD_SIZE;

22
mm/swapfile.c
View File

@ -664,12 +664,15 @@ static bool cluster_scan_range(struct swap_info_struct *si,
return true;
}
static void cluster_alloc_range(struct swap_info_struct *si, struct swap_cluster_info *ci,
static bool cluster_alloc_range(struct swap_info_struct *si, struct swap_cluster_info *ci,
unsigned int start, unsigned char usage,
unsigned int order)
{
unsigned int nr_pages = 1 << order;
if (!(si->flags & SWP_WRITEOK))
return false;
if (cluster_is_free(ci)) {
if (nr_pages < SWAPFILE_CLUSTER) {
list_move_tail(&ci->list, &si->nonfull_clusters[order]);
@ -690,6 +693,8 @@ static void cluster_alloc_range(struct swap_info_struct *si, struct swap_cluster
list_move_tail(&ci->list, &si->full_clusters);
ci->flags = CLUSTER_FLAG_FULL;
}
return true;
}
static unsigned int alloc_swap_scan_cluster(struct swap_info_struct *si, unsigned long offset,
@ -713,7 +718,10 @@ static unsigned int alloc_swap_scan_cluster(struct swap_info_struct *si, unsigne
while (offset <= end) {
if (cluster_scan_range(si, ci, offset, nr_pages)) {
cluster_alloc_range(si, ci, offset, usage, order);
if (!cluster_alloc_range(si, ci, offset, usage, order)) {
offset = SWAP_NEXT_INVALID;
goto done;
}
*foundp = offset;
if (ci->count == SWAPFILE_CLUSTER) {
offset = SWAP_NEXT_INVALID;
@ -805,7 +813,11 @@ static unsigned long cluster_alloc_swap_entry(struct swap_info_struct *si, int o
if (!list_empty(&si->free_clusters)) {
ci = list_first_entry(&si->free_clusters, struct swap_cluster_info, list);
offset = alloc_swap_scan_cluster(si, cluster_offset(si, ci), &found, order, usage);
VM_BUG_ON(!found);
/*
* Either we didn't touch the cluster due to swapoff,
* or the allocation must success.
*/
VM_BUG_ON((si->flags & SWP_WRITEOK) && !found);
goto done;
}
@ -1041,6 +1053,8 @@ static int cluster_alloc_swap(struct swap_info_struct *si,
VM_BUG_ON(!si->cluster_info);
si->flags += SWP_SCANNING;
while (n_ret < nr) {
unsigned long offset = cluster_alloc_swap_entry(si, order, usage);
@ -1049,6 +1063,8 @@ static int cluster_alloc_swap(struct swap_info_struct *si,
slots[n_ret++] = swp_entry(si->type, offset);
}
si->flags -= SWP_SCANNING;
return n_ret;
}

2
tools/mm/page-types.c
View File

@ -420,7 +420,7 @@ static void show_page(unsigned long voffset, unsigned long offset,
if (opt_file)
printf("%lx\t", voffset);
if (opt_list_cgroup)
printf("@%" PRIu64 "\t", cgroup)
printf("@%" PRIu64 "\t", cgroup);
if (opt_list_mapcnt)
printf("%" PRIu64 "\t", mapcnt);