jfs: fix uaf in jfs_evict_inode

stable inclusion
from stable-v4.19.273
commit 81b4249ef37297fb17ba102a524039a05c6c5d35
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I96G7N
CVE: CVE-2023-52600

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.19.y&id=81b4249ef37297fb17ba102a524039a05c6c5d35



--------------------------------

[ Upstream commit e0e1958f4c365e380b17ccb35617345b31ef7bf3 ]

When the execution of diMount(ipimap) fails, the object ipimap that has been
released may be accessed in diFreeSpecial(). Asynchronous ipimap release occurs
when rcu_core() calls jfs_free_node().

Therefore, when diMount(ipimap) fails, sbi->ipimap should not be initialized as
ipimap.

Reported-and-tested-by:  <syzbot+01cf2dbcbe2022454388@syzkaller.appspotmail.com>
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Long Li <leo.lilong@huawei.com>