# git rev-parse -q --verify 5e46d1b78a03d52306f21f77a4e4a144b6d31486^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify 5e46d1b78a03d52306f21f77a4e4a144b6d31486^{commit}
5e46d1b78a03d52306f21f77a4e4a144b6d31486
# 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/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 5e46d1b78a03d52306f21f77a4e4a144b6d31486
# < make -s -j 10 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_HAVE_FTRACE_MCOUNT_RECORD=n
# Added to kconfig CONFIG_SAMPLES=n
# Added to kconfig CONFIG_MODULE_SIG=n
# < make -s -j 10 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  help
# make -s -j 10 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  olddefconfig
# make -s -j 10 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
In file included from /kisskb/src/include/linux/kernel.h:14:0,
                 from /kisskb/src/include/linux/list.h:9,
                 from /kisskb/src/include/linux/module.h:12,
                 from /kisskb/src/drivers/gpu/drm/ttm/ttm_pool.c:34:
/kisskb/src/drivers/gpu/drm/ttm/ttm_pool.c: In function 'ttm_pool_alloc':
/kisskb/src/include/linux/minmax.h:18:28: warning: comparison of distinct pointer types lacks a cast
  (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                            ^
/kisskb/src/include/linux/minmax.h:32:4: note: in expansion of macro '__typecheck'
   (__typecheck(x, y) && __no_side_effects(x, y))
    ^
/kisskb/src/include/linux/minmax.h:42:24: note: in expansion of macro '__safe_cmp'
  __builtin_choose_expr(__safe_cmp(x, y), \
                        ^
/kisskb/src/include/linux/minmax.h:51:19: note: in expansion of macro '__careful_cmp'
 #define min(x, y) __careful_cmp(x, y, <)
                   ^
/kisskb/src/drivers/gpu/drm/ttm/ttm_pool.c:383:15: note: in expansion of macro 'min'
  for (order = min(MAX_ORDER - 1UL, __fls(num_pages)); num_pages;
               ^
/kisskb/src/drivers/input/joystick/analog.c:160:2: warning: #warning Precise timer not defined for this architecture. [-Wcpp]
 #warning Precise timer not defined for this architecture.
  ^
  kernel: arch/sparc/boot/image is ready
  kernel: arch/sparc/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/linus_sparc64-allmodconfig_sparc64
# Build took: 0:35:20.680362