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| author | David S. Miller <davem@davemloft.net> | 2017-08-15 20:23:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-15 20:23:23 -0700 |
| commit | 463910e2dff580e4e9a678af710b4818b5189691 (patch) | |
| tree | 21b4e53cdbec7e5a537ddfc1598fbf17deae57e2 /mm/shmem.c | |
| parent | 22cb7a3ac380ecaab6837670963813599b123a53 (diff) | |
| parent | 510c8a899caf095cb13d09d203573deef15db2fe (diff) | |
| download | op-kernel-dev-463910e2dff580e4e9a678af710b4818b5189691.zip op-kernel-dev-463910e2dff580e4e9a678af710b4818b5189691.tar.gz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 12 |
1 files changed, 10 insertions, 2 deletions
@@ -1022,7 +1022,11 @@ static int shmem_setattr(struct dentry *dentry, struct iattr *attr) */ if (IS_ENABLED(CONFIG_TRANSPARENT_HUGE_PAGECACHE)) { spin_lock(&sbinfo->shrinklist_lock); - if (list_empty(&info->shrinklist)) { + /* + * _careful to defend against unlocked access to + * ->shrink_list in shmem_unused_huge_shrink() + */ + if (list_empty_careful(&info->shrinklist)) { list_add_tail(&info->shrinklist, &sbinfo->shrinklist); sbinfo->shrinklist_len++; @@ -1817,7 +1821,11 @@ alloc_nohuge: page = shmem_alloc_and_acct_page(gfp, info, sbinfo, * to shrink under memory pressure. */ spin_lock(&sbinfo->shrinklist_lock); - if (list_empty(&info->shrinklist)) { + /* + * _careful to defend against unlocked access to + * ->shrink_list in shmem_unused_huge_shrink() + */ + if (list_empty_careful(&info->shrinklist)) { list_add_tail(&info->shrinklist, &sbinfo->shrinklist); sbinfo->shrinklist_len++; |
