# git rev-parse -q --verify 9a48d604672220545d209e9996c2a1edbb5637f6^{commit}
9a48d604672220545d209e9996c2a1edbb5637f6
already have revision, skipping fetch
# git checkout -q -f -B kisskb 9a48d604672220545d209e9996c2a1edbb5637f6
# git clean -qxdf
# < git log -1
# commit 9a48d604672220545d209e9996c2a1edbb5637f6
# Author: Borislav Petkov (AMD) <bp@alien8.de>
# Date:   Fri May 12 23:12:26 2023 +0200
# 
#     x86/retbleed: Fix return thunk alignment
#     
#     SYM_FUNC_START_LOCAL_NOALIGN() adds an endbr leading to this layout
#     (leaving only the last 2 bytes of the address):
#     
#       3bff <zen_untrain_ret>:
#       3bff:       f3 0f 1e fa             endbr64
#       3c03:       f6                      test   $0xcc,%bl
#     
#       3c04 <__x86_return_thunk>:
#       3c04:       c3                      ret
#       3c05:       cc                      int3
#       3c06:       0f ae e8                lfence
#     
#     However, "the RET at __x86_return_thunk must be on a 64 byte boundary,
#     for alignment within the BTB."
#     
#     Use SYM_START instead.
#     
#     Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
#     Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
#     Cc: <stable@kernel.org>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 9a48d604672220545d209e9996c2a1edbb5637f6
# < make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 defconfig
# < make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 help
# make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig
# make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 
  LINK linux
Completed OK
# rm -rf /kisskb/build/linus_um-defconfig_um-x86_64-gcc12
# Build took: 0:00:46.560709