https://github.com/torvalds/linux
Revision 7228918b34615ef6317edcd9a058a057bc54aa32 authored by Ross Philipson on 24 February 2022, 02:07:35 UTC, committed by Borislav Petkov on 09 March 2022, 11:49:44 UTC
As documented, the setup_indirect structure is nested inside
the setup_data structures in the setup_data list. The code currently
accesses the fields inside the setup_indirect structure but only
the sizeof(struct setup_data) is being memremapped. No crash
occurred but this is just due to how the area is remapped under the
covers.

Properly memremap both the setup_data and setup_indirect structures
in these cases before accessing them.

Fixes: b3c72fc9a78e ("x86/boot: Introduce setup_indirect")
Signed-off-by: Ross Philipson <ross.philipson@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1645668456-22036-2-git-send-email-ross.philipson@oracle.com
1 parent 5adf349
History
Tip revision: 7228918b34615ef6317edcd9a058a057bc54aa32 authored by Ross Philipson on 24 February 2022, 02:07:35 UTC
x86/boot: Fix memremap of setup_indirect structures
Tip revision: 7228918
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