diff options
| author | Hangyu Hua <hbh25y@gmail.com> | 2023-11-16 10:57:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-20 19:00:20 +0300 |
| commit | 0dc6a06c484360e5dddf920efe2cf57b7772c35a (patch) | |
| tree | 82d3900dbaf568c98e8d0f2c9ecfeb13d35ca115 /fs/fuse | |
| parent | 36e2497ac7ad9932f7826130fc2b3306e3db89c8 (diff) | |
| download | linux-0dc6a06c484360e5dddf920efe2cf57b7772c35a.tar.xz | |
fuse: dax: set fc->dax to NULL in fuse_dax_conn_free()
commit 7f8ed28d1401320bcb02dda81b3c23ab2dc5a6d8 upstream.
fuse_dax_conn_free() will be called when fuse_fill_super_common() fails
after fuse_dax_conn_alloc(). Then deactivate_locked_super() in
virtio_fs_get_tree() will call virtio_kill_sb() to release the discarded
superblock. This will call fuse_dax_conn_free() again in fuse_conn_put(),
resulting in a possible double free.
Fixes: 1dd539577c42 ("virtiofs: add a mount option to enable dax")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Cc: <stable@vger.kernel.org> # v5.10
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/dax.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index e23e802a8013..6e71904c396f 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -1224,6 +1224,7 @@ void fuse_dax_conn_free(struct fuse_conn *fc) if (fc->dax) { fuse_free_dax_mem_ranges(&fc->dax->free_ranges); kfree(fc->dax); + fc->dax = NULL; } } |