Description: 9p/xen: Fix use after free bug in xen_9pfs_front_remove due to race condition
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2184395
 https://lore.kernel.org/all/20230313090002.3308025-1-zyytlz.wz@163.com/
Notes:
Bugs:
upstream: released (6.3-rc7) [ea4f1009408efb4989a0f139b70fb338e7f687d0]
6.1-upstream-stable: released (6.1.25) [c4002b9d5e837f152a40d1333c56ccb84975147b]
5.10-upstream-stable: released (5.10.178) [9266e939d76279d8710196d86215ba2be6345041]
4.19-upstream-stable: released (4.19.281) [c078fcd3f00ea5eadad07da169956d84f65af49b]
sid: released (6.1.25-1)
5.10-bullseye-security: released (5.10.178-1)
4.19-buster-security: released (4.19.282-1)