# git rev-parse -q --verify d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb^{commit}
d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb
already have revision, skipping fetch
# git checkout -q -f -B kisskb d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb
# git clean -qxdf
# < git log -1
# commit d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb
# Author: Andrew Donnellan <ajd@linux.ibm.com>
# Date:   Tue Dec 10 00:22:21 2019 +1100
# 
#     powerpc: Fix __clear_user() with KUAP enabled
#     
#     The KUAP implementation adds calls in clear_user() to enable and disable
#     access to userspace memory. However, it doesn't add these to
#     __clear_user(), which is used in the ptrace regset code.
#     
#     As there's only one direct user of __clear_user(), and the time taken to
#     set the AMR for KUAP purposes is going to dominate the cost of a quick
#     access_ok(), there's not much point having a separate path.
#     
#     Rename __clear_user() to clear_user_asm(), and make __clear_user() just
#     call clear_user().
#     
#     Reported-by: syzbot+f25ecf4b2982d8c7a640@syzkaller-ppc64.appspotmail.com
#     Reported-by: Daniel Axtens <dja@axtens.net>
#     Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
#     Fixes: de78a9c42a79 ("powerpc: Add a framework for Kernel Userspace Access Protection")
#     Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191209132221.15328-1-ajd@linux.ibm.com
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version
# < git log --format=%s --max-count=1 d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_kmeter1_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  83xx/kmeter1_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_kmeter1_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/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/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/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq':
/kisskb/src/drivers/tty/serial/8250/8250_core.c:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c:228:19: note: 'i' was declared here
/kisskb/src/net/bridge/br_netlink.c: In function 'br_afspec.isra.37':
/kisskb/src/net/bridge/br_netlink.c:648:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c: In function 'tun_get_user':
/kisskb/src/drivers/net/tun.c:1836:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1749:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized]
INFO: Uncompressed kernel (size 0x52b82c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Image Name:   Linux-5.5.0-rc1-gd04cb29a7ef9
Created:      Sat Dec 14 08:46:18 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2611431 Bytes = 2550.23 KiB = 2.49 MiB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_83xx_kmeter1_defconfig_powerpc-gcc4.6
# Build took: 0:00:41.114554