Buildresult: linus/x86_64-defconfig/x86_64-gcc8 built on Mar 31 2021, 09:11

kisskb

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Status:	OK
Date/Time:	Mar 31 2021, 09:11
Duration:	0:02:49.169663
Builder:	blade46
Revision:	reiserfs: update reiserfs_xattrs_initialized() condition (`5e46d1b78a03d52306f21f77a4e4a144b6d31486)`
Target:	linus/x86_64-defconfig/x86_64-gcc8
Branch:	linus
Compiler:	x86_64-gcc8 (x86_64-linux-gcc (GCC) 8.1.0 / GNU ld (GNU Binutils) 2.30)
Config:	defconfig (download)
Log:	Download original No warnings found in log. Full Log # 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/x86_64-linux/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 5e46d1b78a03d52306f21f77a4e4a144b6d31486 # < make -s -j 32 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- x86_64_defconfig # < make -s -j 32 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- help # make -s -j 32 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- olddefconfig # make -s -j 32 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- Completed OK # rm -rf /kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 # Build took: 0:02:49.169663

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