linux

iv/linux

History

Sean Christopherson ccbf3f955c KVM: x86: Mark TSS busy during LTR emulation _after_ all fault checks

commit ec6e4d863258d4bfb36d48d5e3ef68140234d688 upstream.

Wait to mark the TSS as busy during LTR emulation until after all fault
checks for the LTR have passed.  Specifically, don't mark the TSS busy if
the new TSS base is non-canonical.

Opportunistically drop the one-off !seg_desc.PRESENT check for TR as the
only reason for the early check was to avoid marking a !PRESENT TSS as
busy, i.e. the common !PRESENT is now done before setting the busy bit.

Fixes: e37a75a13cda ("KVM: x86: Emulator ignores LDTR/TR extended base on LLDT/LTR")
Reported-by: syzbot+760a73552f47a8cd0fd9@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Hou Wenlong <houwenlong.hwl@antgroup.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20220711232750.1092012-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-08-17 14:22:48 +02:00

alpha

tty: the rest, stop using tty_schedule_flip()

2022-07-29 17:25:32 +02:00

arc

ARC: entry: fix syscall_trace_exit argument

2022-04-27 14:39:00 +02:00

arm

ARM: 9216/1: Fix MAX_DMA_ADDRESS overflow

2022-08-03 12:03:55 +02:00

arm64

arm64: set UXN on swapper page tables