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| author |   Paolo Bonzini <pbonzini@redhat.com> | 2016-11-17 15:55:46 +0100 |
|---|---|---|
| committer |   Radim Krčmář <rkrcmar@redhat.com> | 2016-11-19 19:04:18 +0100 |
| commit | 7301d6abaea926d685832f7e1f0c37dd206b01f4 (patch) | |
| tree | 9ae493670ec38f0e4a6db1334e341e4c2d50594f /arch/x86/kvm/irq_comm.c | |
| parent | KVM: async_pf: avoid recursive flushing of work items (diff) | |
| download | linux-dev-7301d6abaea926d685832f7e1f0c37dd206b01f4.tar.xz linux-dev-7301d6abaea926d685832f7e1f0c37dd206b01f4.zip | |
KVM: x86: fix missed SRCU usage in kvm_lapic_set_vapic_addr
Reported by syzkaller:
[ INFO: suspicious RCU usage. ]
4.9.0-rc4+ #47 Not tainted
-------------------------------
./include/linux/kvm_host.h:536 suspicious rcu_dereference_check() usage!
stack backtrace:
CPU: 1 PID: 6679 Comm: syz-executor Not tainted 4.9.0-rc4+ #47
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
ffff880039e2f6d0 ffffffff81c2e46b ffff88003e3a5b40 0000000000000000
0000000000000001 ffffffff83215600 ffff880039e2f700 ffffffff81334ea9
ffffc9000730b000 0000000000000004 ffff88003c4f8420 ffff88003d3f8000
Call Trace:
[< inline >] __dump_stack lib/dump_stack.c:15
[<ffffffff81c2e46b>] dump_stack+0xb3/0x118 lib/dump_stack.c:51
[<ffffffff81334ea9>] lockdep_rcu_suspicious+0x139/0x180 kernel/locking/lockdep.c:4445
[< inline >] __kvm_memslots include/linux/kvm_host.h:534
[< inline >] kvm_memslots include/linux/kvm_host.h:541
[<ffffffff8105d6ae>] kvm_gfn_to_hva_cache_init+0xa1e/0xce0 virt/kvm/kvm_main.c:1941
[<ffffffff8112685d>] kvm_lapic_set_vapic_addr+0xed/0x140 arch/x86/kvm/lapic.c:2217
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Fixes: fda4e2e85589191b123d31cdc21fd33ee70f50fd
Cc: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch/x86/kvm/irq_comm.c')
0 files changed, 0 insertions, 0 deletions