mei: hbm: fix client dma reply status
authorAlexander Usyskin <alexander.usyskin@intel.com>
Tue, 28 Dec 2021 08:20:47 +0000 (10:20 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 30 Dec 2021 13:12:16 +0000 (14:12 +0100)
commit6b0b80ac103b2a40c72a47c301745fd1f4ef4697
tree8f953e5d8dd3cb2dc82f680af97b3cd05a7170c0
parentfcee5ce50bdb21116711e38635e3865594af907e
mei: hbm: fix client dma reply status

Don't blindly copy status value received from the firmware
into internal client status field,
It may be positive and ERR_PTR(ret) will translate it
into an invalid address and the caller will crash.

Put the error code into the client status on failure.

Fixes: 369aea845951 ("mei: implement client dma setup.")
Cc: <stable@vger.kernel.org> # v5.11+
Reported-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Tested-by: : Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20211228082047.378115-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/misc/mei/hbm.c