Patch "fuse: dax: set fc->dax to NULL in fuse_dax_conn_free()" has been added to the 5.15-stable tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a note to let you know that I've just added the patch titled

    fuse: dax: set fc->dax to NULL in fuse_dax_conn_free()

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     fuse-dax-set-fc-dax-to-null-in-fuse_dax_conn_free.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 7f8ed28d1401320bcb02dda81b3c23ab2dc5a6d8 Mon Sep 17 00:00:00 2001
From: Hangyu Hua <hbh25y@xxxxxxxxx>
Date: Thu, 16 Nov 2023 15:57:26 +0800
Subject: fuse: dax: set fc->dax to NULL in fuse_dax_conn_free()

From: Hangyu Hua <hbh25y@xxxxxxxxx>

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@xxxxxxxxx>
Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
Reviewed-by: Jingbo Xu <jefflexu@xxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.10
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 fs/fuse/dax.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/fuse/dax.c
+++ b/fs/fuse/dax.c
@@ -1227,6 +1227,7 @@ void fuse_dax_conn_free(struct fuse_conn
 	if (fc->dax) {
 		fuse_free_dax_mem_ranges(&fc->dax->free_ranges);
 		kfree(fc->dax);
+		fc->dax = NULL;
 	}
 }
 


Patches currently in stable-queue which might be from hbh25y@xxxxxxxxx are

queue-5.15/fuse-dax-set-fc-dax-to-null-in-fuse_dax_conn_free.patch




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux