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ACPI: pfr_telemetry: Fix info leak in pfrt_log_ioctl()
authorDan Carpenter <dan.carpenter@oracle.com>
Fri, 7 Jan 2022 07:34:07 +0000 (10:34 +0300)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Mon, 10 Jan 2022 15:36:45 +0000 (16:36 +0100)
commitedaa4a74776ddd6dd0b8e8d060e76eddfa65c7a3
tree5198dc8988854deb98617409324d1b4af9436622tree | snapshot
parentdb0650fe723ad6c01592613ce05bb73c54b41aadcommit | diff
ACPI: pfr_telemetry: Fix info leak in pfrt_log_ioctl()

The "data_info" struct is copied to the user.  It has a 4 byte struct
hole after the last struct member so we need to memset that to avoid
copying uninitialized stack data to the user.

Fixes: 413c8f051409 ("ACPI: Introduce Platform Firmware Runtime Telemetry driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/acpi/pfr_telemetry.c diff | blob | history
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