# git rev-parse -q --verify 5e46d1b78a03d52306f21f77a4e4a144b6d31486^{commit}
5e46d1b78a03d52306f21f77a4e4a144b6d31486
already have revision, skipping fetch
# git checkout -q -f -B kisskb 5e46d1b78a03d52306f21f77a4e4a144b6d31486
# git clean -qxdf
# < git log -1
# commit 5e46d1b78a03d52306f21f77a4e4a144b6d31486
# Author: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
# Date:   Sun Mar 21 23:37:49 2021 +0900
# 
#     reiserfs: update reiserfs_xattrs_initialized() condition
#     
#     syzbot is reporting NULL pointer dereference at reiserfs_security_init()
#     [1], for commit ab17c4f02156c4f7 ("reiserfs: fixup xattr_root caching")
#     is assuming that REISERFS_SB(s)->xattr_root != NULL in
#     reiserfs_xattr_jcreate_nblocks() despite that commit made
#     REISERFS_SB(sb)->priv_root != NULL && REISERFS_SB(s)->xattr_root == NULL
#     case possible.
#     
#     I guess that commit 6cb4aff0a77cc0e6 ("reiserfs: fix oops while creating
#     privroot with selinux enabled") wanted to check xattr_root != NULL
#     before reiserfs_xattr_jcreate_nblocks(), for the changelog is talking
#     about the xattr root.
#     
#       The issue is that while creating the privroot during mount
#       reiserfs_security_init calls reiserfs_xattr_jcreate_nblocks which
#       dereferences the xattr root. The xattr root doesn't exist, so we get
#       an oops.
#     
#     Therefore, update reiserfs_xattrs_initialized() to check both the
#     privroot and the xattr root.
#     
#     Link: https://syzkaller.appspot.com/bug?id=8abaedbdeb32c861dc5340544284167dd0e46cde # [1]
#     Reported-and-tested-by: syzbot <syzbot+690cb1e51970435f9775@syzkaller.appspotmail.com>
#     Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
#     Fixes: 6cb4aff0a77c ("reiserfs: fix oops while creating privroot with selinux enabled")
#     Acked-by: Jeff Mahoney <jeffm@suse.com>
#     Acked-by: Jan Kara <jack@suse.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 5e46d1b78a03d52306f21f77a4e4a144b6d31486
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  randconfig
KCONFIG_SEED=0x65A45BEB
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  help
# make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  olddefconfig
.config:6102:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
# make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
Completed OK
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8
# Build took: 0:05:37.483755