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linux/fs/fuse
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Hangyu Hua 0dc6a06c48 fuse: dax: set fc->dax to NULL in fuse_dax_conn_free() 
commit 7f8ed28d14 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: 1dd539577c ("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>
History 2023-12-20 17:00:20 +01:00
..
acl.c vfs: add rcu argument to ->get_acl() callback 2021-08-18 22:08:24 +02:00
control.c fuse: Remove the control interface for virtio-fs 2022-07-21 16:06:19 +02:00
cuse.c cuse: simplify refcount 2021-04-14 10:40:58 +02:00
dax.c fuse: dax: set fc->dax to NULL in fuse_dax_conn_free() 2023-12-20 17:00:20 +01:00
dev.c mm: multi-gen LRU: groundwork 2022-09-26 19:46:09 -07:00
dir.c fuse: revalidate: don't invalidate if interrupted 2023-07-27 08:50:25 +02:00
file.c attr: use consistent sgid stripping checks 2023-03-03 11:52:25 +01:00
fuse_i.h fuse: implement ->tmpfile() 2022-09-24 07:00:00 +02:00
inode.c fuse: Apply flags2 only when userspace set the FUSE_INIT_EXT 2023-07-27 08:50:25 +02:00
ioctl.c fuse: ioctl: translate ENOSYS in outarg 2023-07-27 08:50:25 +02:00
Kconfig dax: remove CONFIG_DAX_DRIVER 2021-12-04 08:58:51 -08:00
Makefile fuse: move ioctl to separate source file 2021-04-12 15:04:30 +02:00
readdir.c fuse: nlookup missing decrement in fuse_direntplus_link 2023-09-19 12:28:05 +02:00
virtio_fs.c virtio_fs: Modify format for virtio_fs_direct_access 2022-07-26 10:38:58 +02:00
xattr.c fuse: move fuse_invalidate_attr() into fuse_update_ctime() 2021-10-22 17:03:01 +02:00