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| author | kib <kib@FreeBSD.org> | 2014-07-28 01:01:20 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2014-07-28 01:01:20 +0000 |
| commit | 1a878ba1c0b17d23acf82ec3ec968d6895b35399 (patch) | |
| tree | 4c5af4f15ae24d61e6f2209c6372d2d00f230a25 /sys/fs/tmpfs | |
| parent | e0e54a97de3dedd0cc276b37878c7e6588f721bf (diff) | |
| download | FreeBSD-src-1a878ba1c0b17d23acf82ec3ec968d6895b35399.zip FreeBSD-src-1a878ba1c0b17d23acf82ec3ec968d6895b35399.tar.gz | |
MFC r268608:
The tmpfs_link() must not dereference the filesystem-specific data for
a vnode until it is verified that the vnode indeed belongs to tmpfs mount.
Diffstat (limited to 'sys/fs/tmpfs')
| -rw-r--r-- | sys/fs/tmpfs/tmpfs_vnops.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/fs/tmpfs/tmpfs_vnops.c b/sys/fs/tmpfs/tmpfs_vnops.c index ea27fca..3586a28 100644 --- a/sys/fs/tmpfs/tmpfs_vnops.c +++ b/sys/fs/tmpfs/tmpfs_vnops.c @@ -570,8 +570,6 @@ tmpfs_link(struct vop_link_args *v) MPASS(cnp->cn_flags & HASBUF); MPASS(dvp != vp); /* XXX When can this be false? */ - node = VP_TO_TMPFS_NODE(vp); - /* XXX: Why aren't the following two tests done by the caller? */ /* Hard links of directories are forbidden. */ @@ -586,6 +584,8 @@ tmpfs_link(struct vop_link_args *v) goto out; } + node = VP_TO_TMPFS_NODE(vp); + /* Ensure that we do not overflow the maximum number of links imposed * by the system. */ MPASS(node->tn_links <= LINK_MAX); |
