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(parent: a8b92b8) | patch
s390/sclp: fix Secure-IPL facility detection
authorAlexander Egorenkov <egorenar@linux.ibm.com>
Thu, 9 Sep 2021 10:20:56 +0000 (12:20 +0200)
committerVasily Gorbik <gor@linux.ibm.com>
Wed, 15 Sep 2021 12:29:21 +0000 (14:29 +0200)
commitd76b14f3971a0638b6cd0da289f8b48acee287d0
tree4448cbeb39cc57c62ae68ff6379bf9c65ff5b66atree | snapshot
parenta8b92b8c1eac8d655a97b1e90f4d83c25d9b9a18commit | diff
s390/sclp: fix Secure-IPL facility detection

Prevent out-of-range access if the returned SCLP SCCB response is smaller
in size than the address of the Secure-IPL flag.

Fixes: c9896acc7851 ("s390/ipl: Provide has_secure sysfs attribute")
Cc: stable@vger.kernel.org # 5.2+
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
drivers/s390/char/sclp_early.c diff | blob | history
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