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Merge branch 'akpm' (patches from Andrew)

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Merge misc mm fixes from Andrew Morton:
 "2 patches.

  Subsystems affected by this patch series: mm (userfaultfd and damon)"

* akpm:
  mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()'
  userfaultfd/selftests: fix hugetlb area allocations
This commit is contained in:
Linus Torvalds 2021-12-31 09:28:48 -08:00
commit f87bcc88f3
2 changed files with 17 additions and 8 deletions
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9
mm/damon/dbgfs.c
View File

@ -353,6 +353,7 @@ static ssize_t dbgfs_target_ids_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
struct damon_ctx *ctx = file->private_data;
struct damon_target *t, *next_t;
bool id_is_pid = true;
char *kbuf, *nrs;
unsigned long *targets;
@ -397,8 +398,12 @@ static ssize_t dbgfs_target_ids_write(struct file *file,
goto unlock_out;
}
/* remove targets with previously-set primitive */
damon_set_targets(ctx, NULL, 0);
/* remove previously set targets */
damon_for_each_target_safe(t, next_t, ctx) {
if (targetid_is_pid(ctx))
put_pid((struct pid *)t->id);
damon_destroy_target(t);
}
/* Configure the context for the address space type */
if (id_is_pid)

16
tools/testing/selftests/vm/userfaultfd.c
View File

@ -87,7 +87,7 @@ static bool test_uffdio_minor = false;
static bool map_shared;
static int shm_fd;
static int huge_fd;
static int huge_fd = -1; /* only used for hugetlb_shared test */
static char *huge_fd_off0;
static unsigned long long *count_verify;
static int uffd = -1;
@ -223,6 +223,9 @@ static void noop_alias_mapping(__u64 *start, size_t len, unsigned long offset)
static void hugetlb_release_pages(char *rel_area)
{
if (huge_fd == -1)
return;
if (fallocate(huge_fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
rel_area == huge_fd_off0 ? 0 : nr_pages * page_size,
nr_pages * page_size))
@ -235,16 +238,17 @@ static void hugetlb_allocate_area(void **alloc_area)
char **alloc_area_alias;
*alloc_area = mmap(NULL, nr_pages * page_size, PROT_READ | PROT_WRITE,
(map_shared ? MAP_SHARED : MAP_PRIVATE) |
MAP_HUGETLB,
huge_fd, *alloc_area == area_src ? 0 :
nr_pages * page_size);
map_shared ? MAP_SHARED :
MAP_PRIVATE | MAP_HUGETLB |
(*alloc_area == area_src ? 0 : MAP_NORESERVE),
huge_fd,
*alloc_area == area_src ? 0 : nr_pages * page_size);
if (*alloc_area == MAP_FAILED)
err("mmap of hugetlbfs file failed");
if (map_shared) {
area_alias = mmap(NULL, nr_pages * page_size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_HUGETLB,
MAP_SHARED,
huge_fd, *alloc_area == area_src ? 0 :
nr_pages * page_size);
if (area_alias == MAP_FAILED)