# git rev-parse -q --verify ba422731316dde1e22dcc84b83c7349dc0ce1c3c^{commit}
ba422731316dde1e22dcc84b83c7349dc0ce1c3c
already have revision, skipping fetch
# git checkout -q -f -B kisskb ba422731316dde1e22dcc84b83c7349dc0ce1c3c
# git clean -qxdf
# < git log -1
# commit ba422731316dde1e22dcc84b83c7349dc0ce1c3c
# Author: Sean Christopherson <sean.j.christopherson@intel.com>
# Date:   Wed Jan 9 16:51:17 2019 -0800
# 
#     mm/mmu_notifier: mm/rmap.c: Fix a mmu_notifier range bug in try_to_unmap_one
#     
#     The conversion to use a structure for mmu_notifier_invalidate_range_*()
#     unintentionally changed the usage in try_to_unmap_one() to init the
#     'struct mmu_notifier_range' with vma->vm_start instead of @address,
#     i.e. it invalidates the wrong address range.  Revert to the correct
#     address range.
#     
#     Manifests as KVM use-after-free WARNINGs and subsequent "BUG: Bad page
#     state in process X" errors when reclaiming from a KVM guest due to KVM
#     removing the wrong pages from its own mappings.
#     
#     Reported-by: leozinho29_eu@hotmail.com
#     Reported-by: Mike Galbraith <efault@gmx.de>
#     Reported-and-tested-by: Adam Borowski <kilobyte@angband.pl>
#     Reviewed-by: Jérôme Glisse <jglisse@redhat.com>
#     Reviewed-by: Pankaj gupta <pagupta@redhat.com>
#     Cc: Christian König <christian.koenig@amd.com>
#     Cc: Jan Kara <jack@suse.cz>
#     Cc: Matthew Wilcox <mawilcox@microsoft.com>
#     Cc: Ross Zwisler <zwisler@kernel.org>
#     Cc: Dan Williams <dan.j.williams@intel.com>
#     Cc: Paolo Bonzini <pbonzini@redhat.com>
#     Cc: Radim Krčmář <rkrcmar@redhat.com>
#     Cc: Michal Hocko <mhocko@kernel.org>
#     Cc: Felix Kuehling <felix.kuehling@amd.com>
#     Cc: Ralph Campbell <rcampbell@nvidia.com>
#     Cc: John Hubbard <jhubbard@nvidia.com>
#     Cc: Andrew Morton <akpm@linux-foundation.org>
#     Fixes: ac46d4f3c432 ("mm/mmu_notifier: use structure for invalidate_range_start/end calls v2")
#     Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-gcc --version
# < /opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-ld --version
# < git log --format=%s --max-count=1 ba422731316dde1e22dcc84b83c7349dc0ce1c3c
# < make -s -j 48 ARCH=xtensa O=/kisskb/build/linus_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-  defconfig
drivers/staging/mt7621-dts/Kconfig:4:warning: 'BUILTIN_DTB' has wrong type. 'select' only accept arguments of bool and tristate type
# make -s -j 48 ARCH=xtensa O=/kisskb/build/linus_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-  
<stdin>:1333:2: warning: #warning syscall io_pgetevents not implemented [-Wcpp]
<stdin>:1336:2: warning: #warning syscall rseq not implemented [-Wcpp]
Completed OK
# rm -rf /kisskb/build/linus_xtensa-defconfig_xtensa
# Build took: 0:00:27.299293