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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2009-02-20 17:04:33 +0300 |
|---|---|---|
| committer | Alexey Dobriyan <adobriyan@gmail.com> | 2009-03-31 01:14:27 +0400 |
| commit | 3dec7f59c370c7b58184d63293c3dc984d475840 (patch) | |
| tree | 54df7ab53c1f625179e2b69c78b782b5a867363e /fs/proc/internal.h | |
| parent | 09729a9919fdaf137995b0f19cbd401e22229cac (diff) | |
| download | lwn-3dec7f59c370c7b58184d63293c3dc984d475840.tar.gz lwn-3dec7f59c370c7b58184d63293c3dc984d475840.zip | |
proc 1/2: do PDE usecounting even for ->read_proc, ->write_proc
struct proc_dir_entry::owner is going to be removed. Now it's only necessary
to protect PDEs which are using ->read_proc, ->write_proc hooks.
However, ->owner assignments are racy and make it very easy for someone to switch
->owner on live PDE (as some subsystems do) without fixing refcounts and so on.
http://bugzilla.kernel.org/show_bug.cgi?id=12454
So, ->owner is on death row.
Proxy file operations exist already (proc_file_operations), just bump usecount
when necessary.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Diffstat (limited to 'fs/proc/internal.h')
| -rw-r--r-- | fs/proc/internal.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/proc/internal.h b/fs/proc/internal.h index cd53ff838498..f6db9618a888 100644 --- a/fs/proc/internal.h +++ b/fs/proc/internal.h @@ -91,3 +91,4 @@ struct pde_opener { int (*release)(struct inode *, struct file *); struct list_head lh; }; +void pde_users_dec(struct proc_dir_entry *pde); |