diff for duplicates of <202112190517.NPcuhEOX-lkp@intel.com> diff --git a/a/1.txt b/N1/1.txt index 3ec6f2e..74b7f65 100644 --- a/a/1.txt +++ b/N1/1.txt @@ -1,12 +1,6 @@ -CC: kbuild-all(a)lists.01.org -CC: linux-kernel(a)vger.kernel.org -TO: Andrea Arcangeli <aarcange@redhat.com> - tree: https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git main head: 2f1336124b54750df7ae428da9352e4d8091f31e commit: fec43fa50ccf8365ae2a8d9f150970ab6ca42b18 [44/48] KSM: only attempt to merge with KSM pages if the payload doesn't change -:::::: branch date: 2 days ago -:::::: commit date: 2 days ago config: i386-randconfig-m021-20211218 (https://download.01.org/0day-ci/archive/20211219/202112190517.NPcuhEOX-lkp(a)intel.com/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 @@ -19,16 +13,6 @@ mm/ksm.c:2134 cmp_and_merge_page() error: uninitialized symbol 'checksum'. vim +/checksum +2134 mm/ksm.c -31dbd01f314364 Izik Eidus 2009-09-21 2049 -31dbd01f314364 Izik Eidus 2009-09-21 2050 /* -81464e30609cdb Hugh Dickins 2009-09-21 2051 * cmp_and_merge_page - first see if page can be merged into the stable tree; -81464e30609cdb Hugh Dickins 2009-09-21 2052 * if not, compare checksum to previous and if it's the same, see if page can -81464e30609cdb Hugh Dickins 2009-09-21 2053 * be inserted into the unstable tree, or merged with a page already there and -81464e30609cdb Hugh Dickins 2009-09-21 2054 * both transferred to the stable tree. -31dbd01f314364 Izik Eidus 2009-09-21 2055 * -31dbd01f314364 Izik Eidus 2009-09-21 2056 * @page: the page that we are searching identical page to. -31dbd01f314364 Izik Eidus 2009-09-21 2057 * @rmap_item: the reverse mapping into the virtual address of this page -31dbd01f314364 Izik Eidus 2009-09-21 2058 */ 31dbd01f314364 Izik Eidus 2009-09-21 2059 static void cmp_and_merge_page(struct page *page, struct rmap_item *rmap_item) 31dbd01f314364 Izik Eidus 2009-09-21 2060 { 4b22927f0cbd58 Kirill Tkhai 2017-10-03 2061 struct mm_struct *mm = rmap_item->mm; @@ -65,6 +49,9 @@ fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2091 * time we calculated it, t fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2092 * therefore we don't want to write protect it. fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2093 */ fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2094 checksum = calc_checksum(page); + +"checksum" initialized here. Not intialized for stable_node. + fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2095 if (rmap_item->oldchecksum != checksum) { fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2096 rmap_item->oldchecksum = checksum; fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2097 remove_rmap_item_from_tree(rmap_item); @@ -105,6 +92,11 @@ e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2131 * Same checksum as an empty e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2132 * appropriate zero page if the user enabled this via sysfs. e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2133 */ e86c59b1b12d0d Claudio Imbrenda 2017-02-24 @2134 if (ksm_use_zero_pages && (checksum == zero_checksum)) { + +uninitialized here. Smatch cannot see how ksm_use_zero_pages and +stable_node are related. (Neither can I but I have not looked at the +context). + e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2135 struct vm_area_struct *vma; e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2136 d8ed45c5dcd455 Michel Lespinasse 2020-06-08 2137 mmap_read_lock(mm); @@ -189,13 +181,6 @@ bc56620b493496 Hugh Dickins 2013-02-22 2180 * node in the stable tree 31dbd01f314364 Izik Eidus 2009-09-21 2216 } 31dbd01f314364 Izik Eidus 2009-09-21 2217 } 31dbd01f314364 Izik Eidus 2009-09-21 2218 } -31dbd01f314364 Izik Eidus 2009-09-21 2219 - -:::::: The code at line 2134 was first introduced by commit -:::::: e86c59b1b12d0db1c97eb5bec7586a691685c6cc mm/ksm: improve deduplication of zero pages with colouring - -:::::: TO: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> -:::::: CC: Linus Torvalds <torvalds@linux-foundation.org> --- 0-DAY CI Kernel Test Service, Intel Corporation diff --git a/a/content_digest b/N1/content_digest index c17802b..def7ace 100644 --- a/a/content_digest +++ b/N1/content_digest @@ -1,18 +1,12 @@ - "From\0kernel test robot <lkp@intel.com>\0" + "From\0Dan Carpenter <dan.carpenter@oracle.com>\0" "Subject\0[andrea-aa:main 44/48] mm/ksm.c:2134 cmp_and_merge_page() error: uninitialized symbol 'checksum'.\0" - "Date\0Sun, 19 Dec 2021 05:20:39 +0800\0" - "To\0kbuild@lists.01.org\0" + "Date\0Wed, 05 Jan 2022 13:02:49 +0300\0" + "To\0kbuild-all@lists.01.org\0" "\01:1\0" "b\0" - "CC: kbuild-all(a)lists.01.org\n" - "CC: linux-kernel(a)vger.kernel.org\n" - "TO: Andrea Arcangeli <aarcange@redhat.com>\n" - "\n" "tree: https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git main\n" "head: 2f1336124b54750df7ae428da9352e4d8091f31e\n" "commit: fec43fa50ccf8365ae2a8d9f150970ab6ca42b18 [44/48] KSM: only attempt to merge with KSM pages if the payload doesn't change\n" - ":::::: branch date: 2 days ago\n" - ":::::: commit date: 2 days ago\n" "config: i386-randconfig-m021-20211218 (https://download.01.org/0day-ci/archive/20211219/202112190517.NPcuhEOX-lkp(a)intel.com/config)\n" "compiler: gcc-9 (Debian 9.3.0-22) 9.3.0\n" "\n" @@ -25,16 +19,6 @@ "\n" "vim +/checksum +2134 mm/ksm.c\n" "\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2049 \n" - "31dbd01f314364 Izik Eidus 2009-09-21 2050 /*\n" - "81464e30609cdb Hugh Dickins 2009-09-21 2051 * cmp_and_merge_page - first see if page can be merged into the stable tree;\n" - "81464e30609cdb Hugh Dickins 2009-09-21 2052 * if not, compare checksum to previous and if it's the same, see if page can\n" - "81464e30609cdb Hugh Dickins 2009-09-21 2053 * be inserted into the unstable tree, or merged with a page already there and\n" - "81464e30609cdb Hugh Dickins 2009-09-21 2054 * both transferred to the stable tree.\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2055 *\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2056 * @page: the page that we are searching identical page to.\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2057 * @rmap_item: the reverse mapping into the virtual address of this page\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2058 */\n" "31dbd01f314364 Izik Eidus 2009-09-21 2059 static void cmp_and_merge_page(struct page *page, struct rmap_item *rmap_item)\n" "31dbd01f314364 Izik Eidus 2009-09-21 2060 {\n" "4b22927f0cbd58 Kirill Tkhai 2017-10-03 2061 \tstruct mm_struct *mm = rmap_item->mm;\n" @@ -71,6 +55,9 @@ "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2092 \t\t * therefore we don't want to write protect it.\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2093 \t\t */\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2094 \t\tchecksum = calc_checksum(page);\n" + "\n" + "\"checksum\" initialized here. Not intialized for stable_node.\n" + "\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2095 \t\tif (rmap_item->oldchecksum != checksum) {\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2096 \t\t\trmap_item->oldchecksum = checksum;\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2097 \t\t\tremove_rmap_item_from_tree(rmap_item);\n" @@ -111,6 +98,11 @@ "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2132 \t * appropriate zero page if the user enabled this via sysfs.\n" "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2133 \t */\n" "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 @2134 \tif (ksm_use_zero_pages && (checksum == zero_checksum)) {\n" + "\n" + "uninitialized here. Smatch cannot see how ksm_use_zero_pages and\n" + "stable_node are related. (Neither can I but I have not looked at the\n" + "context).\n" + "\n" "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2135 \t\tstruct vm_area_struct *vma;\n" "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2136 \n" "d8ed45c5dcd455 Michel Lespinasse 2020-06-08 2137 \t\tmmap_read_lock(mm);\n" @@ -195,16 +187,9 @@ "31dbd01f314364 Izik Eidus 2009-09-21 2216 \t\t}\n" "31dbd01f314364 Izik Eidus 2009-09-21 2217 \t}\n" "31dbd01f314364 Izik Eidus 2009-09-21 2218 }\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2219 \n" - "\n" - ":::::: The code at line 2134 was first introduced by commit\n" - ":::::: e86c59b1b12d0db1c97eb5bec7586a691685c6cc mm/ksm: improve deduplication of zero pages with colouring\n" - "\n" - ":::::: TO: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>\n" - ":::::: CC: Linus Torvalds <torvalds@linux-foundation.org>\n" "\n" "---\n" "0-DAY CI Kernel Test Service, Intel Corporation\n" https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org -36d5c5dcd3d23ddcd406f003ab65986c281f956e70612cc1f75b6c8022d6bd93 +a18cf1fc4a0f52e33bac8e2b79152ca367f12cb07c2772119dd912a21f770943
diff --git a/a/1.txt b/N2/1.txt index 3ec6f2e..5544f7f 100644 --- a/a/1.txt +++ b/N2/1.txt @@ -1,13 +1,7 @@ -CC: kbuild-all(a)lists.01.org -CC: linux-kernel(a)vger.kernel.org -TO: Andrea Arcangeli <aarcange@redhat.com> - tree: https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git main head: 2f1336124b54750df7ae428da9352e4d8091f31e commit: fec43fa50ccf8365ae2a8d9f150970ab6ca42b18 [44/48] KSM: only attempt to merge with KSM pages if the payload doesn't change -:::::: branch date: 2 days ago -:::::: commit date: 2 days ago -config: i386-randconfig-m021-20211218 (https://download.01.org/0day-ci/archive/20211219/202112190517.NPcuhEOX-lkp(a)intel.com/config) +config: i386-randconfig-m021-20211218 (https://download.01.org/0day-ci/archive/20211219/202112190517.NPcuhEOX-lkp@intel.com/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate @@ -19,16 +13,6 @@ mm/ksm.c:2134 cmp_and_merge_page() error: uninitialized symbol 'checksum'. vim +/checksum +2134 mm/ksm.c -31dbd01f314364 Izik Eidus 2009-09-21 2049 -31dbd01f314364 Izik Eidus 2009-09-21 2050 /* -81464e30609cdb Hugh Dickins 2009-09-21 2051 * cmp_and_merge_page - first see if page can be merged into the stable tree; -81464e30609cdb Hugh Dickins 2009-09-21 2052 * if not, compare checksum to previous and if it's the same, see if page can -81464e30609cdb Hugh Dickins 2009-09-21 2053 * be inserted into the unstable tree, or merged with a page already there and -81464e30609cdb Hugh Dickins 2009-09-21 2054 * both transferred to the stable tree. -31dbd01f314364 Izik Eidus 2009-09-21 2055 * -31dbd01f314364 Izik Eidus 2009-09-21 2056 * @page: the page that we are searching identical page to. -31dbd01f314364 Izik Eidus 2009-09-21 2057 * @rmap_item: the reverse mapping into the virtual address of this page -31dbd01f314364 Izik Eidus 2009-09-21 2058 */ 31dbd01f314364 Izik Eidus 2009-09-21 2059 static void cmp_and_merge_page(struct page *page, struct rmap_item *rmap_item) 31dbd01f314364 Izik Eidus 2009-09-21 2060 { 4b22927f0cbd58 Kirill Tkhai 2017-10-03 2061 struct mm_struct *mm = rmap_item->mm; @@ -65,6 +49,9 @@ fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2091 * time we calculated it, t fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2092 * therefore we don't want to write protect it. fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2093 */ fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2094 checksum = calc_checksum(page); + +"checksum" initialized here. Not intialized for stable_node. + fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2095 if (rmap_item->oldchecksum != checksum) { fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2096 rmap_item->oldchecksum = checksum; fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2097 remove_rmap_item_from_tree(rmap_item); @@ -105,6 +92,11 @@ e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2131 * Same checksum as an empty e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2132 * appropriate zero page if the user enabled this via sysfs. e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2133 */ e86c59b1b12d0d Claudio Imbrenda 2017-02-24 @2134 if (ksm_use_zero_pages && (checksum == zero_checksum)) { + +uninitialized here. Smatch cannot see how ksm_use_zero_pages and +stable_node are related. (Neither can I but I have not looked at the +context). + e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2135 struct vm_area_struct *vma; e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2136 d8ed45c5dcd455 Michel Lespinasse 2020-06-08 2137 mmap_read_lock(mm); @@ -189,14 +181,7 @@ bc56620b493496 Hugh Dickins 2013-02-22 2180 * node in the stable tree 31dbd01f314364 Izik Eidus 2009-09-21 2216 } 31dbd01f314364 Izik Eidus 2009-09-21 2217 } 31dbd01f314364 Izik Eidus 2009-09-21 2218 } -31dbd01f314364 Izik Eidus 2009-09-21 2219 - -:::::: The code at line 2134 was first introduced by commit -:::::: e86c59b1b12d0db1c97eb5bec7586a691685c6cc mm/ksm: improve deduplication of zero pages with colouring - -:::::: TO: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> -:::::: CC: Linus Torvalds <torvalds@linux-foundation.org> --- 0-DAY CI Kernel Test Service, Intel Corporation -https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org +https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org diff --git a/a/content_digest b/N2/content_digest index c17802b..07dc3ea 100644 --- a/a/content_digest +++ b/N2/content_digest @@ -1,19 +1,17 @@ - "From\0kernel test robot <lkp@intel.com>\0" + "From\0Dan Carpenter <dan.carpenter@oracle.com>\0" "Subject\0[andrea-aa:main 44/48] mm/ksm.c:2134 cmp_and_merge_page() error: uninitialized symbol 'checksum'.\0" - "Date\0Sun, 19 Dec 2021 05:20:39 +0800\0" - "To\0kbuild@lists.01.org\0" - "\01:1\0" + "Date\0Wed, 5 Jan 2022 13:02:49 +0300\0" + "To\0kbuild@lists.01.org" + " Andrea Arcangeli <aarcange@redhat.com>\0" + "Cc\0lkp@intel.com" + kbuild-all@lists.01.org + " linux-kernel@vger.kernel.org\0" + "\00:1\0" "b\0" - "CC: kbuild-all(a)lists.01.org\n" - "CC: linux-kernel(a)vger.kernel.org\n" - "TO: Andrea Arcangeli <aarcange@redhat.com>\n" - "\n" "tree: https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git main\n" "head: 2f1336124b54750df7ae428da9352e4d8091f31e\n" "commit: fec43fa50ccf8365ae2a8d9f150970ab6ca42b18 [44/48] KSM: only attempt to merge with KSM pages if the payload doesn't change\n" - ":::::: branch date: 2 days ago\n" - ":::::: commit date: 2 days ago\n" - "config: i386-randconfig-m021-20211218 (https://download.01.org/0day-ci/archive/20211219/202112190517.NPcuhEOX-lkp(a)intel.com/config)\n" + "config: i386-randconfig-m021-20211218 (https://download.01.org/0day-ci/archive/20211219/202112190517.NPcuhEOX-lkp@intel.com/config)\n" "compiler: gcc-9 (Debian 9.3.0-22) 9.3.0\n" "\n" "If you fix the issue, kindly add following tag as appropriate\n" @@ -25,16 +23,6 @@ "\n" "vim +/checksum +2134 mm/ksm.c\n" "\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2049 \n" - "31dbd01f314364 Izik Eidus 2009-09-21 2050 /*\n" - "81464e30609cdb Hugh Dickins 2009-09-21 2051 * cmp_and_merge_page - first see if page can be merged into the stable tree;\n" - "81464e30609cdb Hugh Dickins 2009-09-21 2052 * if not, compare checksum to previous and if it's the same, see if page can\n" - "81464e30609cdb Hugh Dickins 2009-09-21 2053 * be inserted into the unstable tree, or merged with a page already there and\n" - "81464e30609cdb Hugh Dickins 2009-09-21 2054 * both transferred to the stable tree.\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2055 *\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2056 * @page: the page that we are searching identical page to.\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2057 * @rmap_item: the reverse mapping into the virtual address of this page\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2058 */\n" "31dbd01f314364 Izik Eidus 2009-09-21 2059 static void cmp_and_merge_page(struct page *page, struct rmap_item *rmap_item)\n" "31dbd01f314364 Izik Eidus 2009-09-21 2060 {\n" "4b22927f0cbd58 Kirill Tkhai 2017-10-03 2061 \tstruct mm_struct *mm = rmap_item->mm;\n" @@ -71,6 +59,9 @@ "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2092 \t\t * therefore we don't want to write protect it.\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2093 \t\t */\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2094 \t\tchecksum = calc_checksum(page);\n" + "\n" + "\"checksum\" initialized here. Not intialized for stable_node.\n" + "\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2095 \t\tif (rmap_item->oldchecksum != checksum) {\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2096 \t\t\trmap_item->oldchecksum = checksum;\n" "fec43fa50ccf83 Andrea Arcangeli 2021-11-23 2097 \t\t\tremove_rmap_item_from_tree(rmap_item);\n" @@ -111,6 +102,11 @@ "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2132 \t * appropriate zero page if the user enabled this via sysfs.\n" "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2133 \t */\n" "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 @2134 \tif (ksm_use_zero_pages && (checksum == zero_checksum)) {\n" + "\n" + "uninitialized here. Smatch cannot see how ksm_use_zero_pages and\n" + "stable_node are related. (Neither can I but I have not looked at the\n" + "context).\n" + "\n" "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2135 \t\tstruct vm_area_struct *vma;\n" "e86c59b1b12d0d Claudio Imbrenda 2017-02-24 2136 \n" "d8ed45c5dcd455 Michel Lespinasse 2020-06-08 2137 \t\tmmap_read_lock(mm);\n" @@ -195,16 +191,9 @@ "31dbd01f314364 Izik Eidus 2009-09-21 2216 \t\t}\n" "31dbd01f314364 Izik Eidus 2009-09-21 2217 \t}\n" "31dbd01f314364 Izik Eidus 2009-09-21 2218 }\n" - "31dbd01f314364 Izik Eidus 2009-09-21 2219 \n" - "\n" - ":::::: The code at line 2134 was first introduced by commit\n" - ":::::: e86c59b1b12d0db1c97eb5bec7586a691685c6cc mm/ksm: improve deduplication of zero pages with colouring\n" - "\n" - ":::::: TO: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>\n" - ":::::: CC: Linus Torvalds <torvalds@linux-foundation.org>\n" "\n" "---\n" "0-DAY CI Kernel Test Service, Intel Corporation\n" - https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org + https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org -36d5c5dcd3d23ddcd406f003ab65986c281f956e70612cc1f75b6c8022d6bd93 +d2bdcd33783880dbe8c6c6d4d7b37d33cee1fd87fa543e3ad05229cc903bcba3
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