* [ext4:nls 20/47] fs/ext4/super.c:931:40: error: 'struct ext4_sb_info' has no member named 's_qf_names'; did you mean 's_mb_maxs'?
@ 2018-10-08 14:51 kbuild test robot
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From: kbuild test robot @ 2018-10-08 14:51 UTC (permalink / raw)
To: Theodore Ts'o; +Cc: kbuild-all, linux-ext4
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git nls
head: 82e650bbf0fe816841c219b7ba7feec601d1f47b
commit: cc1ee227e8906d1434da440e5b8267fc4b928590 [20/47] ext4: fix use-after-free race in ext4_remount()'s error path
config: sh-espt_defconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout cc1ee227e8906d1434da440e5b8267fc4b928590
# save the attached .config to linux build tree
GCC_VERSION=7.2.0 make.cross ARCH=sh
All error/warnings (new ones prefixed by >>):
In file included from include/linux/srcu.h:33:0,
from include/linux/notifier.h:16,
from include/linux/memory_hotplug.h:7,
from include/linux/mmzone.h:758,
from include/linux/gfp.h:6,
from include/linux/umh.h:4,
from include/linux/kmod.h:22,
from include/linux/module.h:13,
from fs/ext4/super.c:20:
fs/ext4/super.c: In function 'get_qf_name':
>> fs/ext4/super.c:931:40: error: 'struct ext4_sb_info' has no member named 's_qf_names'; did you mean 's_mb_maxs'?
return rcu_dereference_protected(sbi->s_qf_names[type],
^
include/linux/rcupdate.h:358:12: note: in definition of macro '__rcu_dereference_protected'
((typeof(*p) __force __kernel *)(p)); \
^
>> fs/ext4/super.c:931:9: note: in expansion of macro 'rcu_dereference_protected'
return rcu_dereference_protected(sbi->s_qf_names[type],
^~~~~~~~~~~~~~~~~~~~~~~~~
>> fs/ext4/super.c:931:40: error: 'struct ext4_sb_info' has no member named 's_qf_names'; did you mean 's_mb_maxs'?
return rcu_dereference_protected(sbi->s_qf_names[type],
^
include/linux/rcupdate.h:358:35: note: in definition of macro '__rcu_dereference_protected'
((typeof(*p) __force __kernel *)(p)); \
^
>> fs/ext4/super.c:931:9: note: in expansion of macro 'rcu_dereference_protected'
return rcu_dereference_protected(sbi->s_qf_names[type],
^~~~~~~~~~~~~~~~~~~~~~~~~
fs/ext4/super.c: In function 'parse_options':
fs/ext4/super.c:1976:26: warning: unused variable 'grp_qf_name' [-Wunused-variable]
char *p, *usr_qf_name, *grp_qf_name;
^~~~~~~~~~~
fs/ext4/super.c:1976:12: warning: unused variable 'usr_qf_name' [-Wunused-variable]
char *p, *usr_qf_name, *grp_qf_name;
^~~~~~~~~~~
vim +931 fs/ext4/super.c
922
923 /*
924 * This is a helper function which is used in the mount/remount
925 * codepaths (which holds s_umount) to fetch the quota file name.
926 */
927 static inline char *get_qf_name(struct super_block *sb,
928 struct ext4_sb_info *sbi,
929 int type)
930 {
> 931 return rcu_dereference_protected(sbi->s_qf_names[type],
932 lockdep_is_held(&sb->s_umount));
933 }
934
---
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