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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-27 10:28:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-27 10:28:34 -0700 |
| commit | 005fbcd03458b6c0044f65c1fe8d8a68d726a321 (patch) | |
| tree | 60265e75c50f3acf802e195363f44b8a10acdf80 /fs | |
| parent | Merge tag 'usb-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb (diff) | |
| parent | s390/ccwgroup: Fix memory corruption (diff) | |
| download | linux-dev-005fbcd03458b6c0044f65c1fe8d8a68d726a321.tar.xz linux-dev-005fbcd03458b6c0044f65c1fe8d8a68d726a321.zip | |
Merge tag 'driver-core-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are some kernfs fixes for 3.15-rc3 that resolve some reported
problems. Nothing huge, but all needed"
* tag 'driver-core-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
s390/ccwgroup: Fix memory corruption
kernfs: add back missing error check in kernfs_fop_mmap()
kernfs: fix a subdir count leak
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/kernfs/dir.c | 9 | ||||
| -rw-r--r-- | fs/kernfs/file.c | 2 |
2 files changed, 8 insertions, 3 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index 78f3403300af..ac127cd008bf 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -232,9 +232,6 @@ static int kernfs_link_sibling(struct kernfs_node *kn) struct rb_node **node = &kn->parent->dir.children.rb_node; struct rb_node *parent = NULL; - if (kernfs_type(kn) == KERNFS_DIR) - kn->parent->dir.subdirs++; - while (*node) { struct kernfs_node *pos; int result; @@ -249,9 +246,15 @@ static int kernfs_link_sibling(struct kernfs_node *kn) else return -EEXIST; } + /* add new node and rebalance the tree */ rb_link_node(&kn->rb, parent, node); rb_insert_color(&kn->rb, &kn->parent->dir.children); + + /* successfully added, account subdir number */ + if (kernfs_type(kn) == KERNFS_DIR) + kn->parent->dir.subdirs++; + return 0; } diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index 8034706a7af8..e01ea4a14a01 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -484,6 +484,8 @@ static int kernfs_fop_mmap(struct file *file, struct vm_area_struct *vma) ops = kernfs_ops(of->kn); rc = ops->mmap(of, vma); + if (rc) + goto out_put; /* * PowerPC's pci_mmap of legacy_mem uses shmem_zero_setup() |