Michal Luczaj 61242001d6 KVM: Initialize gfn_to_pfn_cache locks in dedicated helper ... commit 52491a38b2 upstream. Move the gfn_to_pfn_cache lock initialization to another helper and call the new helper during VM/vCPU creation. There are race conditions possible due to kvm_gfn_to_pfn_cache_init()'s ability to re-initialize the cache's locks. For example: a race between ioctl(KVM_XEN_HVM_EVTCHN_SEND) and kvm_gfn_to_pfn_cache_init() leads to a corrupted shinfo gpc lock. (thread 1) | (thread 2) | kvm_xen_set_evtchn_fast | read_lock_irqsave(&gpc->lock, ...) | | kvm_gfn_to_pfn_cache_init | rwlock_init(&gpc->lock) read_unlock_irqrestore(&gpc->lock, ...) | Rename "cache_init" and "cache_destroy" to activate+deactivate to avoid implying that the cache really is destroyed/freed. Note, there more races in the newly named kvm_gpc_activate() that will be addressed separately. Fixes: 982ed0de47 ("KVM: Reinstate gfn_to_pfn_cache with invalidation support") Cc: stable@vger.kernel.org Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Michal Luczaj <mhal@rbox.co> [sean: call out that this is a bug fix] Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20221013211234.1318131-2-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-11-10 18:17:38 +01:00
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acpi	ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init()	2022-11-10 18:17:24 +01:00
asm-generic	arm64 fixes for -rc7	2022-09-23 15:28:51 -07:00
clocksource
crypto
drm	drm/edid: Handle EDID 1.4 range descriptor h/vfreq offsets	2022-09-02 16:38:51 +03:00
dt-bindings	dt-bindings: clock: exynosautov9: correct clock numbering of peric0/c1	2022-10-21 12:38:32 +02:00
keys
kunit	kunit: fix assert_type for comparison macros	2022-09-01 13:00:32 -06:00
kvm
linux	KVM: Initialize gfn_to_pfn_cache locks in dedicated helper	2022-11-10 18:17:38 +01:00
math-emu
media	media: v4l: subdev: Fail graciously when getting try data for NULL state	2022-11-10 18:17:24 +01:00
memory
misc
net	net: remove SOCK_SUPPORT_ZC from sockmap	2022-11-10 18:17:35 +01:00
pcmcia
ras
rdma
rv
scsi	scsi: stex: Properly zero out the passthrough command structure	2022-10-15 08:02:56 +02:00
soc	AT91 fixes for 6.0	2022-09-02 11:29:03 +02:00
sound	ASoC: Intel: common: add ACPI matching tables for Raptor Lake	2022-11-04 00:00:28 +09:00
target
trace	ARM: SoC fixes for 6.0-rc6	2022-09-22 11:10:11 -07:00
uapi	media: videodev2.h: V4L2_DV_BT_BLANKING_HEIGHT should check 'interlaced'	2022-11-04 00:00:32 +09:00
ufs
vdso
video
xen