# git rev-parse -q --verify 81429eb8d9ca40b0c65bb739d29fa856c5d5e958^{commit}
81429eb8d9ca40b0c65bb739d29fa856c5d5e958
already have revision, skipping fetch
# git checkout -q -f -B kisskb 81429eb8d9ca40b0c65bb739d29fa856c5d5e958
# git clean -qxdf
# < git log -1
# commit 81429eb8d9ca40b0c65bb739d29fa856c5d5e958
# Merge: be5fa3aac23f e50be648aaa3
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Nov 21 12:15:24 2019 -0800
# 
#     Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
#     
#     Pull arm64 fix from Will Deacon:
#      "Ensure PAN is re-enabled following user fault in uaccess routines.
#     
#       After I thought we were done for 5.4, we had a report this week of a
#       nasty issue that has been shown to leak data between different user
#       address spaces thanks to corruption of entries in the TLB. In
#       hindsight, we should have spotted this in review when the PAN code was
#       merged back in v4.3, but hindsight is 20/20 and I'm trying not to beat
#       myself up too much about it despite being fairly miserable.
#     
#       Anyway, the fix is "obvious" but the actual failure is more more
#       subtle, and is described in the commit message. I've included a fairly
#       mechanical follow-up patch here as well, which moves this checking out
#       into the C wrappers which is what we do for {get,put}_user() already
#       and allows us to remove these bloody assembly macros entirely. The
#       patches have passed kernelci [1] [2] [3] and CKI [4] tests over night,
#       as well as some targetted testing [5] for this particular issue.
#     
#       The first patch is tagged for stable and should be applied to 4.14,
#       4.19 and 5.3. I have separate backports for 4.4 and 4.9, which I'll
#       send out once this has landed in your tree (although the original
#       patch applies cleanly, it won't build for those two trees).
#     
#       Thanks to Pavel Tatashin for reporting this and Mark Rutland for
#       helping to diagnose the issue and review/test the solution"
#     
#     * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
#       arm64: uaccess: Remove uaccess_*_not_uao asm macros
#       arm64: uaccess: Ensure PAN is re-enabled after unhandled uaccess fault
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 81429eb8d9ca40b0c65bb739d29fa856c5d5e958
# < make -s -j 48 ARCH=arm O=/kisskb/build/linus_imote2_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  imote2_defconfig
# make -s -j 48 ARCH=arm O=/kisskb/build/linus_imote2_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:121:34: warning: 'levelspread[<U1500>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:88:6: note: 'levelspread[<U1500>]' was declared here
/kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read':
/kisskb/src/drivers/base/regmap/regmap.c:2591:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write':
/kisskb/src/drivers/base/regmap/regmap.c:1852:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/bridge/br_netlink.c: In function 'br_afspec':
/kisskb/src/net/bridge/br_netlink.c:648:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here
/kisskb/src/crypto/sha512_generic.c: In function 'sha512_transform':
/kisskb/src/crypto/sha512_generic.c:149:1: warning: the frame size of 1184 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/drivers/usb/core/devio.c: In function 'async_completed':
/kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized]
WARNING: "return_address" [vmlinux] is a static EXPORT_SYMBOL_GPL
Completed OK
# rm -rf /kisskb/build/linus_imote2_defconfig_arm
# Build took: 0:01:09.466325