diff options
| author | Robert Love <rml@novell.com> | 2005-07-25 21:10:08 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-26 22:37:21 +0200 |
| commit | 783bc29bbc5d6625a4669d3eb1d989a8fb275d43 (patch) | |
| tree | 100222921c788e68009ba1b2dccbeaba06b81e89 /fs/inotify.c | |
| parent | [PATCH] inotify: use fget_light (diff) | |
| download | linux-783bc29bbc5d6625a4669d3eb1d989a8fb275d43.tar.xz linux-783bc29bbc5d6625a4669d3eb1d989a8fb275d43.zip | |
[PATCH] inotify: oops fix
Bug fix: Ensure that the fd passed to inotify_add_watch() and
inotify_rm_watch() belongs to inotify.
Signed-off-by: Robert Love <rml@novell.com>
Signed-off-by: John McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/inotify.c')
| -rw-r--r-- | fs/inotify.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/fs/inotify.c b/fs/inotify.c index 807209f0bcda..b55d6e4a0911 100644 --- a/fs/inotify.c +++ b/fs/inotify.c @@ -929,6 +929,12 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask) if (unlikely(!filp)) return -EBADF; + /* verify that this is indeed an inotify instance */ + if (unlikely(filp->f_op != &inotify_fops)) { + ret = -EINVAL; + goto fput_and_out; + } + ret = find_inode(path, &nd); if (unlikely(ret)) goto fput_and_out; @@ -986,10 +992,18 @@ asmlinkage long sys_inotify_rm_watch(int fd, u32 wd) filp = fget_light(fd, &fput_needed); if (unlikely(!filp)) return -EBADF; + + /* verify that this is indeed an inotify instance */ + if (unlikely(filp->f_op != &inotify_fops)) { + ret = -EINVAL; + goto out; + } + dev = filp->private_data; ret = inotify_ignore(dev, wd); - fput_light(filp, fput_needed); +out: + fput_light(filp, fput_needed); return ret; } |