:::::: :::::: Manual check reason: "low confidence static check first_new_problem: drivers/md/dm-thin-metadata.c:950:7: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]" ::::::
CC: l...@lists.linux.dev CC: kbuild-...@lists.01.org BCC: l...@intel.com CC: linux-ker...@vger.kernel.org TO: Rasmus Villemoes <li...@rasmusvillemoes.dk> CC: Miguel Ojeda <oj...@kernel.org> CC: Nick Desaulniers <ndesaulni...@google.com> CC: Andrew Morton <a...@linux-foundation.org> CC: Linux Memory Management List <linux...@kvack.org> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 952c53cd357c71338a59d444933ed48a879229e1 commit: e1edc277e6f6dfb372216522dfc57f9381c39e35 linux/container_of.h: switch to static_assert date: 8 months ago :::::: branch date: 2 hours ago :::::: commit date: 8 months ago config: riscv-randconfig-c006-20220707 (https://download.01.org/0day-ci/archive/20220711/202207110444.bq2uzasc-...@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 77a38f6839980bfac61babb40d83772c51427011) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install riscv cross compiling tool for clang build # apt-get install binutils-riscv-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e1edc277e6f6dfb372216522dfc57f9381c39e35 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout e1edc277e6f6dfb372216522dfc57f9381c39e35 # save the config file COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <l...@intel.com> clang-analyzer warnings: (new ones prefixed by >>) ^~~~ drivers/interconnect/core.c:388:3: note: '?' condition is false if (!data) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ drivers/interconnect/core.c:388:3: note: Taking false branch if (!data) ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ drivers/interconnect/core.c:485:13: note: Returning from 'of_icc_get_from_provider' dst_data = of_icc_get_from_provider(&dst_args); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/interconnect/core.c:487:2: note: '?' condition is false if (IS_ERR(dst_data)) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ drivers/interconnect/core.c:487:2: note: '?' condition is false if (IS_ERR(dst_data)) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ drivers/interconnect/core.c:487:2: note: Taking false branch if (IS_ERR(dst_data)) { ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ drivers/interconnect/core.c:496:2: note: '?' condition is false if (IS_ERR(path)) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ drivers/interconnect/core.c:496:2: note: '?' condition is false if (IS_ERR(path)) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ drivers/interconnect/core.c:496:2: note: Taking false branch if (IS_ERR(path)) { ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ drivers/interconnect/core.c:501:6: note: Assuming field 'tag' is not equal to 0 if (src_data->tag && src_data->tag == dst_data->tag) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ drivers/interconnect/core.c:501:6: note: Left side of '&&' is true if (src_data->tag && src_data->tag == dst_data->tag) ^ drivers/interconnect/core.c:501:37: note: The right operand of '==' is a garbage value if (src_data->tag && src_data->tag == dst_data->tag) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ Suppressed 12 warnings (12 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. >> drivers/md/dm-thin-metadata.c:950:7: warning: Use of memory after it is >> freed [clang-analyzer-unix.Malloc] if (dm_pool_metadata_close(pmd) < 0) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ drivers/md/dm-thin-metadata.c:927:6: note: Assuming 'pmd' is non-null if (!pmd) { ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ drivers/md/dm-thin-metadata.c:927:2: note: '?' condition is false if (!pmd) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ drivers/md/dm-thin-metadata.c:927:7: note: 'pmd' is non-null if (!pmd) { ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ drivers/md/dm-thin-metadata.c:927:2: note: '?' condition is false if (!pmd) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ drivers/md/dm-thin-metadata.c:927:2: note: Taking false branch if (!pmd) { ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ drivers/md/dm-thin-metadata.c:932:2: note: Loop condition is false. Exiting loop init_rwsem(&pmd->root_lock); ^ include/linux/rwsem.h:106:30: note: expanded from macro 'init_rwsem' #define init_rwsem(sem) \ ^ drivers/md/dm-thin-metadata.c:943:2: note: '?' condition is false if (r) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ drivers/md/dm-thin-metadata.c:943:6: note: 'r' is 0 if (r) { ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ drivers/md/dm-thin-metadata.c:943:2: note: '?' condition is false if (r) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ drivers/md/dm-thin-metadata.c:943:2: note: Taking false branch if (r) { vim +950 drivers/md/dm-thin-metadata.c 3ab91828166895 Joe Thornber 2018-09-10 918 991d9fa02da0dd Joe Thornber 2011-10-31 919 struct dm_pool_metadata *dm_pool_metadata_open(struct block_device *bdev, 66b1edc05e3f4c Joe Thornber 2012-07-27 920 sector_t data_block_size, 66b1edc05e3f4c Joe Thornber 2012-07-27 921 bool format_device) 991d9fa02da0dd Joe Thornber 2011-10-31 922 { 991d9fa02da0dd Joe Thornber 2011-10-31 923 int r; 991d9fa02da0dd Joe Thornber 2011-10-31 924 struct dm_pool_metadata *pmd; 991d9fa02da0dd Joe Thornber 2011-10-31 925 991d9fa02da0dd Joe Thornber 2011-10-31 926 pmd = kmalloc(sizeof(*pmd), GFP_KERNEL); 991d9fa02da0dd Joe Thornber 2011-10-31 927 if (!pmd) { 991d9fa02da0dd Joe Thornber 2011-10-31 928 DMERR("could not allocate metadata struct"); 991d9fa02da0dd Joe Thornber 2011-10-31 929 return ERR_PTR(-ENOMEM); 991d9fa02da0dd Joe Thornber 2011-10-31 930 } 991d9fa02da0dd Joe Thornber 2011-10-31 931 6a0ebd31b6b504 Joe Thornber 2012-07-27 932 init_rwsem(&pmd->root_lock); 6a0ebd31b6b504 Joe Thornber 2012-07-27 933 pmd->time = 0; 6a0ebd31b6b504 Joe Thornber 2012-07-27 934 INIT_LIST_HEAD(&pmd->thin_devices); da105ed5fd7edc Joe Thornber 2012-07-27 935 pmd->fail_io = false; 873f258becca87 Mike Snitzer 2019-04-18 936 pmd->in_service = false; 332627db00a982 Joe Thornber 2012-07-27 937 pmd->bdev = bdev; 9cb6653f9a515f Joe Thornber 2012-07-27 938 pmd->data_block_size = data_block_size; ecda7c0280e6b3 Nikos Tsironis 2019-12-04 939 pmd->pre_commit_fn = NULL; ecda7c0280e6b3 Nikos Tsironis 2019-12-04 940 pmd->pre_commit_context = NULL; 991d9fa02da0dd Joe Thornber 2011-10-31 941 66b1edc05e3f4c Joe Thornber 2012-07-27 942 r = __create_persistent_data_objects(pmd, format_device); 991d9fa02da0dd Joe Thornber 2011-10-31 943 if (r) { 991d9fa02da0dd Joe Thornber 2011-10-31 944 kfree(pmd); 991d9fa02da0dd Joe Thornber 2011-10-31 945 return ERR_PTR(r); 991d9fa02da0dd Joe Thornber 2011-10-31 946 } 991d9fa02da0dd Joe Thornber 2011-10-31 947 991d9fa02da0dd Joe Thornber 2011-10-31 948 r = __begin_transaction(pmd); 991d9fa02da0dd Joe Thornber 2011-10-31 949 if (r < 0) { 9cb6653f9a515f Joe Thornber 2012-07-27 @950 if (dm_pool_metadata_close(pmd) < 0) 9cb6653f9a515f Joe Thornber 2012-07-27 951 DMWARN("%s: dm_pool_metadata_close() failed.", __func__); 9cb6653f9a515f Joe Thornber 2012-07-27 952 return ERR_PTR(r); 991d9fa02da0dd Joe Thornber 2011-10-31 953 } 991d9fa02da0dd Joe Thornber 2011-10-31 954 3ab91828166895 Joe Thornber 2018-09-10 955 __set_metadata_reserve(pmd); 3ab91828166895 Joe Thornber 2018-09-10 956 991d9fa02da0dd Joe Thornber 2011-10-31 957 return pmd; 991d9fa02da0dd Joe Thornber 2011-10-31 958 } 991d9fa02da0dd Joe Thornber 2011-10-31 959 :::::: The code at line 950 was first introduced by commit :::::: 9cb6653f9a515f6cb0eaabfb27a2204b0aaf4e48 dm thin metadata: factor out __write_initial_superblock :::::: TO: Joe Thornber <e...@redhat.com> :::::: CC: Alasdair G Kergon <a...@redhat.com> -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- kbuild@lists.01.org To unsubscribe send an email to kbuild-le...@lists.01.org
