tree: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git fix-bz-206443 head: c20bac9bf82cd6560d269aa1e885e036d9e418b3 commit: 08999c46de7867f694b25689f2432f0861f4d33f [5/6] ext4: fix potential race between s_group_info online resizing and access reproduce: # apt-get install sparse # sparse version: v0.6.1-173-ge0787745-dirty git checkout 08999c46de7867f694b25689f2432f0861f4d33f make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** -- fs/ext4/balloc.c:284:16: sparse: sparse: incompatible types in comparison expression (different address spaces): fs/ext4/balloc.c:284:16: sparse: struct buffer_head *[noderef] <asn:4> * fs/ext4/balloc.c:284:16: sparse: struct buffer_head ** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** -- >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** -- >> fs/ext4/mballoc.c:2377:9: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/mballoc.c:2377:9: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/mballoc.c:2377:9: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** >> fs/ext4/ext4.h:3002:21: sparse: sparse: incompatible types in comparison expression (different address spaces): >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info **[noderef] <asn:4> * >> fs/ext4/ext4.h:3002:21: sparse: struct ext4_group_info *** vim +3002 fs/ext4/ext4.h 2992 2993 static inline 2994 struct ext4_group_info *ext4_get_group_info(struct super_block *sb, 2995 ext4_group_t group) 2996 { 2997 struct ext4_group_info **grp_info; 2998 long indexv, indexh; 2999 BUG_ON(group >= EXT4_SB(sb)->s_groups_count); 3000 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); 3001 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); > 3002 grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv); 3003 return grp_info[indexh]; 3004 } 3005 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
