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authorLinus Torvalds <torvalds@linux-foundation.org>2021-07-24 12:27:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-07-24 12:27:16 -0700
commitbca1d4de3981335754f04b557b84b75b9705b6bf (patch)
treef0877803ab93cec6662722e60a7307a055f4bf73 /fs
parentf0fddcec6b6254b4b3611388786bbafb703ad257 (diff)
parente0f7e2b2f7e7864238a4eea05cc77ae1be2bf784 (diff)
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Merge branch 'akpm' (patches from Andrew)
Merge misc mm fixes from Andrew Morton: "15 patches. VM subsystems affected by this patch series: userfaultfd, kfence, highmem, pagealloc, memblock, pagecache, secretmem, pagemap, and hugetlbfs" * akpm: hugetlbfs: fix mount mode command line processing mm: fix the deadlock in finish_fault() mm: mmap_lock: fix disabling preemption directly mm/secretmem: wire up ->set_page_dirty writeback, cgroup: do not reparent dax inodes writeback, cgroup: remove wb from offline list before releasing refcnt memblock: make for_each_mem_range() traverse MEMBLOCK_HOTPLUG regions mm: page_alloc: fix page_poison=1 / INIT_ON_ALLOC_DEFAULT_ON interaction mm: use kmap_local_page in memzero_page mm: call flush_dcache_page() in memcpy_to_page() and memzero_page() kfence: skip all GFP_ZONEMASK allocations kfence: move the size check to the beginning of __kfence_alloc() kfence: defer kfence_test_init to ensure that kunit debugfs is created selftest: use mmap instead of posix_memalign to allocate memory userfaultfd: do not untag user pointers
Diffstat (limited to 'fs')
-rw-r--r--fs/fs-writeback.c3
-rw-r--r--fs/hugetlbfs/inode.c2
-rw-r--r--fs/userfaultfd.c26
3 files changed, 16 insertions, 15 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 06d04a74ab6c..4c3370548982 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -521,6 +521,9 @@ static bool inode_prepare_wbs_switch(struct inode *inode,
*/
smp_mb();
+ if (IS_DAX(inode))
+ return false;
+
/* while holding I_WB_SWITCH, no one else can update the association */
spin_lock(&inode->i_lock);
if (!(inode->i_sb->s_flags & SB_ACTIVE) ||
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 926eeb9bf4eb..cdfb1ae78a3f 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -77,7 +77,7 @@ enum hugetlb_param {
static const struct fs_parameter_spec hugetlb_fs_parameters[] = {
fsparam_u32 ("gid", Opt_gid),
fsparam_string("min_size", Opt_min_size),
- fsparam_u32 ("mode", Opt_mode),
+ fsparam_u32oct("mode", Opt_mode),
fsparam_string("nr_inodes", Opt_nr_inodes),
fsparam_string("pagesize", Opt_pagesize),
fsparam_string("size", Opt_size),
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index f6e0f0c0d0e5..5c2d806e6ae5 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -1236,23 +1236,21 @@ static __always_inline void wake_userfault(struct userfaultfd_ctx *ctx,
}
static __always_inline int validate_range(struct mm_struct *mm,
- __u64 *start, __u64 len)
+ __u64 start, __u64 len)
{
__u64 task_size = mm->task_size;
- *start = untagged_addr(*start);
-
- if (*start & ~PAGE_MASK)
+ if (start & ~PAGE_MASK)
return -EINVAL;
if (len & ~PAGE_MASK)
return -EINVAL;
if (!len)
return -EINVAL;
- if (*start < mmap_min_addr)
+ if (start < mmap_min_addr)
return -EINVAL;
- if (*start >= task_size)
+ if (start >= task_size)
return -EINVAL;
- if (len > task_size - *start)
+ if (len > task_size - start)
return -EINVAL;
return 0;
}
@@ -1316,7 +1314,7 @@ static int userfaultfd_register(struct userfaultfd_ctx *ctx,
vm_flags |= VM_UFFD_MINOR;
}
- ret = validate_range(mm, &uffdio_register.range.start,
+ ret = validate_range(mm, uffdio_register.range.start,
uffdio_register.range.len);
if (ret)
goto out;
@@ -1522,7 +1520,7 @@ static int userfaultfd_unregister(struct userfaultfd_ctx *ctx,
if (copy_from_user(&uffdio_unregister, buf, sizeof(uffdio_unregister)))
goto out;
- ret = validate_range(mm, &uffdio_unregister.start,
+ ret = validate_range(mm, uffdio_unregister.start,
uffdio_unregister.len);
if (ret)
goto out;
@@ -1671,7 +1669,7 @@ static int userfaultfd_wake(struct userfaultfd_ctx *ctx,
if (copy_from_user(&uffdio_wake, buf, sizeof(uffdio_wake)))
goto out;
- ret = validate_range(ctx->mm, &uffdio_wake.start, uffdio_wake.len);
+ ret = validate_range(ctx->mm, uffdio_wake.start, uffdio_wake.len);
if (ret)
goto out;
@@ -1711,7 +1709,7 @@ static int userfaultfd_copy(struct userfaultfd_ctx *ctx,
sizeof(uffdio_copy)-sizeof(__s64)))
goto out;
- ret = validate_range(ctx->mm, &uffdio_copy.dst, uffdio_copy.len);
+ ret = validate_range(ctx->mm, uffdio_copy.dst, uffdio_copy.len);
if (ret)
goto out;
/*
@@ -1768,7 +1766,7 @@ static int userfaultfd_zeropage(struct userfaultfd_ctx *ctx,
sizeof(uffdio_zeropage)-sizeof(__s64)))
goto out;
- ret = validate_range(ctx->mm, &uffdio_zeropage.range.start,
+ ret = validate_range(ctx->mm, uffdio_zeropage.range.start,
uffdio_zeropage.range.len);
if (ret)
goto out;
@@ -1818,7 +1816,7 @@ static int userfaultfd_writeprotect(struct userfaultfd_ctx *ctx,
sizeof(struct uffdio_writeprotect)))
return -EFAULT;
- ret = validate_range(ctx->mm, &uffdio_wp.range.start,
+ ret = validate_range(ctx->mm, uffdio_wp.range.start,
uffdio_wp.range.len);
if (ret)
return ret;
@@ -1866,7 +1864,7 @@ static int userfaultfd_continue(struct userfaultfd_ctx *ctx, unsigned long arg)
sizeof(uffdio_continue) - (sizeof(__s64))))
goto out;
- ret = validate_range(ctx->mm, &uffdio_continue.range.start,
+ ret = validate_range(ctx->mm, uffdio_continue.range.start,
uffdio_continue.range.len);
if (ret)
goto out;