scsi: wd33c93: Don't use stale scsi_pointer value

stable inclusion
from stable-v6.6.57
commit e04642a207f1d2ae28a08624c04c67f5681f3451
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRE0
CVE: CVE-2024-50026

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e04642a207f1d2ae28a08624c04c67f5681f3451



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

commit 9023ed8d91eb1fcc93e64dc4962f7412b1c4cbec upstream.

A regression was introduced with commit dbb2da55 ("scsi: wd33c93:
Move the SCSI pointer to private command data") which results in an oops
in wd33c93_intr(). That commit added the scsi_pointer variable and
initialized it from hostdata->connected. However, during selection,
hostdata->connected is not yet valid. Fix this by getting the current
scsi_pointer from hostdata->selecting.

Cc: Daniel Palmer <daniel@0x0f.com>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: stable@kernel.org
Fixes: dbb2da55 ("scsi: wd33c93: Move the SCSI pointer to private command data")
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Co-developed-by: Finn Thain <fthain@linux-m68k.org>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Link: https://lore.kernel.org/r/09e11a0a54e6aa2a88bd214526d305aaf018f523.1727926187.git.fthain@linux-m68k.org


Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Cheng Yu <serein.chengyu@huawei.com>