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Six hotfixes. Five are cc:stable: four for MM, one for nilfs2. Also a

Browse source 
MAINTAINERS update.
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Merge tag 'mm-hotfixes-stable-2023-02-17-15-16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "Six hotfixes. Five are cc:stable: four for MM, one for nilfs2.

  Also a MAINTAINERS update"

* tag 'mm-hotfixes-stable-2023-02-17-15-16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  nilfs2: fix underflow in second superblock position calculations
  hugetlb: check for undefined shift on 32 bit architectures
  mm/migrate: fix wrongly apply write bit after mkdirty on sparc64
  MAINTAINERS: update FPU EMULATOR web page
  mm/MADV_COLLAPSE: set EAGAIN on unexpected page refcount
  mm/filemap: fix page end in filemap_get_read_batch
This commit is contained in:
Linus Torvalds 2023-02-17 17:51:40 -08:00
commit 38f8ccde04
9 changed files with 38 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
MAINTAINERS
View file

@ -8202,7 +8202,7 @@ F: drivers/fpga/microchip-spi.c
FPU EMULATOR
M: Bill Metzenthen <billm@melbpc.org.au>
S: Maintained
W: http://floatingpoint.sourceforge.net/emulator/index.html
W: https://floatingpoint.billm.au/
F: arch/x86/math-emu/
FRAMEBUFFER CORE

7
fs/nilfs2/ioctl.c
View file

@ -1114,7 +1114,14 @@ static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
minseg = range[0] + segbytes - 1;
do_div(minseg, segbytes);
if (range[1] < 4096)
goto out;
maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
if (maxseg < segbytes)
goto out;
do_div(maxseg, segbytes);
maxseg--;

9
fs/nilfs2/super.c
View file

@ -408,6 +408,15 @@ int nilfs_resize_fs(struct super_block *sb, __u64 newsize)
if (newsize > devsize)
goto out;
/*
* Prevent underflow in second superblock position calculation.
* The exact minimum size check is done in nilfs_sufile_resize().
*/
if (newsize < 4096) {
ret = -ENOSPC;
goto out;
}
/*
* Write lock is required to protect some functions depending
* on the number of segments, the number of reserved segments,

8
fs/nilfs2/the_nilfs.c
View file

@ -544,9 +544,15 @@ static int nilfs_load_super_block(struct the_nilfs *nilfs,
{
struct nilfs_super_block **sbp = nilfs->ns_sbp;
struct buffer_head **sbh = nilfs->ns_sbh;
u64 sb2off = NILFS_SB2_OFFSET_BYTES(bdev_nr_bytes(nilfs->ns_bdev));
u64 sb2off, devsize = bdev_nr_bytes(nilfs->ns_bdev);
int valid[2], swp = 0;
if (devsize < NILFS_SEG_MIN_BLOCKS * NILFS_MIN_BLOCK_SIZE + 4096) {
nilfs_err(sb, "device size too small");
return -EINVAL;
}
sb2off = NILFS_SB2_OFFSET_BYTES(devsize);
sbp[0] = nilfs_read_super_block(sb, NILFS_SB_OFFSET_BYTES, blocksize,
&sbh[0]);
sbp[1] = nilfs_read_super_block(sb, sb2off, blocksize, &sbh[1]);

3
include/linux/hugetlb.h
View file

@ -743,7 +743,10 @@ static inline struct hstate *hstate_sizelog(int page_size_log)
if (!page_size_log)
return &default_hstate;
if (page_size_log < BITS_PER_LONG)
return size_to_hstate(1UL << page_size_log);
return NULL;
}
static inline struct hstate *hstate_vma(struct vm_area_struct *vma)

5
mm/filemap.c
View file

@ -2588,18 +2588,19 @@ static int filemap_get_pages(struct kiocb *iocb, struct iov_iter *iter,
struct folio *folio;
int err = 0;
/* "last_index" is the index of the page beyond the end of the read */
last_index = DIV_ROUND_UP(iocb->ki_pos + iter->count, PAGE_SIZE);
retry:
if (fatal_signal_pending(current))
return -EINTR;
filemap_get_read_batch(mapping, index, last_index, fbatch);
filemap_get_read_batch(mapping, index, last_index - 1, fbatch);
if (!folio_batch_count(fbatch)) {
if (iocb->ki_flags & IOCB_NOIO)
return -EAGAIN;
page_cache_sync_readahead(mapping, ra, filp, index,
last_index - index);
filemap_get_read_batch(mapping, index, last_index, fbatch);
filemap_get_read_batch(mapping, index, last_index - 1, fbatch);
}
if (!folio_batch_count(fbatch)) {
if (iocb->ki_flags & (IOCB_NOWAIT | IOCB_WAITQ))

6
mm/huge_memory.c
View file

@ -3272,8 +3272,6 @@ void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)
pmde = mk_huge_pmd(new, READ_ONCE(vma->vm_page_prot));
if (pmd_swp_soft_dirty(*pvmw->pmd))
pmde = pmd_mksoft_dirty(pmde);
if (is_writable_migration_entry(entry))
pmde = maybe_pmd_mkwrite(pmde, vma);
if (pmd_swp_uffd_wp(*pvmw->pmd))
pmde = pmd_wrprotect(pmd_mkuffd_wp(pmde));
if (!is_migration_entry_young(entry))
@ -3281,6 +3279,10 @@ void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)
/* NOTE: this may contain setting soft-dirty on some archs */
if (PageDirty(new) && is_migration_entry_dirty(entry))
pmde = pmd_mkdirty(pmde);
if (is_writable_migration_entry(entry))
pmde = maybe_pmd_mkwrite(pmde, vma);
else
pmde = pmd_wrprotect(pmde);
if (PageAnon(new)) {
rmap_t rmap_flags = RMAP_COMPOUND;

1
mm/khugepaged.c
View file

@ -2611,6 +2611,7 @@ static int madvise_collapse_errno(enum scan_result r)
case SCAN_CGROUP_CHARGE_FAIL:
return -EBUSY;
/* Resource temporary unavailable - trying again might succeed */
case SCAN_PAGE_COUNT:
case SCAN_PAGE_LOCK:
case SCAN_PAGE_LRU:
case SCAN_DEL_PAGE_LRU:

2
mm/migrate.c
View file

@ -224,6 +224,8 @@ static bool remove_migration_pte(struct folio *folio,
pte = maybe_mkwrite(pte, vma);
else if (pte_swp_uffd_wp(*pvmw.pte))
pte = pte_mkuffd_wp(pte);
else
pte = pte_wrprotect(pte);
if (folio_test_anon(folio) && !is_readable_migration_entry(entry))
rmap_flags |= RMAP_EXCLUSIVE;