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X-CSE-ConnectionGUID: oconBKdRQh6WgGgMLVBVlA== X-CSE-MsgGUID: +me0SpG4TDWdDSH94HIJKQ== X-IronPort-AV: E=McAfee;i="6800,10657,11879"; a="98779658" X-IronPort-AV: E=Sophos;i="6.25,231,1779174000"; d="scan'208";a="98779658" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2026 22:55:36 -0700 X-CSE-ConnectionGUID: L+bAr8wYTQ2O9Q9GsN50iA== X-CSE-MsgGUID: NmTJsojaTiCet01w3WbIXw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,231,1779174000"; d="scan'208";a="263708636" Received: from lkp-server01.sh.intel.com (HELO 6eda058d650d) ([10.239.97.150]) by orviesa006.jf.intel.com with ESMTP; 18 Aug 2026 22:55:34 -0700 Received: from kbuild by 6eda058d650d with local (Exim 4.98.2) (envelope-from ) id 1wwZGt-00000000ev4-389b; Wed, 19 Aug 2026 05:55:31 +0000 Date: Wed, 19 Aug 2026 13:55:19 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Dan Carpenter Subject: [chao:feature/cache 6/13] fs/f2fs/gc.c:1897 do_garbage_collect() error: 'sum_entry' dereferencing possible ERR_PTR() Message-ID: <202608191338.E8L1n0k3-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev CC: Chao Yu TO: Chao Yu tree: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git feature/cache head: cc6a23d8c232f588f3a5415d1b10a19e1e4ce860 commit: 843ddf01eb4efc800bdac9de795bdeb57940a3e0 [6/13] f2fs: cache: use meta cache :::::: branch date: 18 hours ago :::::: commit date: 18 hours ago config: x86_64-randconfig-161-20260819 (https://download.01.org/0day-ci/archive/20260819/202608191338.E8L1n0k3-lkp@intel.com/config) compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project e9846648fd6183ee6d8cbdb4502213fcf902a211) smatch: v0.5.0-9187-g5189e3fb If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202608191338.E8L1n0k3-lkp@intel.com/ New smatch warnings: fs/f2fs/gc.c:1897 do_garbage_collect() error: 'sum_entry' dereferencing possible ERR_PTR() fs/f2fs/segment.c:4617 write_compacted_summaries() warn: variable dereferenced before check 'entry' (see line 4600) Old smatch warnings: fs/f2fs/gc.c:819 f2fs_get_victim() warn: check sign expansion for '-1' fs/f2fs/gc.c:1298 ra_data_block() warn: missing error code 'err' fs/f2fs/segment.c:874 __remove_dirty_segment() warn: check sign expansion for '-1' vim +/sum_entry +1897 fs/f2fs/gc.c 7bc0900347e069 Jaegeuk Kim 2012-11-02 1772 718e53fa633f84 Chao Yu 2016-01-23 1773 static int do_garbage_collect(struct f2fs_sb_info *sbi, 718e53fa633f84 Chao Yu 2016-01-23 1774 unsigned int start_segno, 7dede88659df38 Chao Yu 2021-02-20 1775 struct gc_inode_list *gc_list, int gc_type, 9748c2ddea4a3f Daeho Jeong 2024-09-09 1776 bool force_migrate, bool one_time) 7bc0900347e069 Jaegeuk Kim 2012-11-02 1777 { c718379b6b0954 Jaegeuk Kim 2013-04-24 1778 struct blk_plug plug; 718e53fa633f84 Chao Yu 2016-01-23 1779 unsigned int segno = start_segno; a60108f7dfb586 Jaegeuk Kim 2024-02-06 1780 unsigned int end_segno = start_segno + SEGS_PER_SEC(sbi); 8c890c4c603427 Daeho Jeong 2024-09-09 1781 unsigned int sec_end_segno; e3080b0120a15e Chao Yu 2018-10-24 1782 int seg_freed = 0, migrated = 0; 5dfb768326b95c Daeho Jeong 2026-05-14 1783 unsigned char type; 5dfb768326b95c Daeho Jeong 2026-05-14 1784 unsigned char data_type; 7ee8bc3942f209 Daeho Jeong 2025-11-11 1785 int submitted = 0, sum_blk_cnt; 7bc0900347e069 Jaegeuk Kim 2012-11-02 1786 8c890c4c603427 Daeho Jeong 2024-09-09 1787 if (__is_large_section(sbi)) { 8c890c4c603427 Daeho Jeong 2024-09-09 1788 sec_end_segno = rounddown(end_segno, SEGS_PER_SEC(sbi)); e3080b0120a15e Chao Yu 2018-10-24 1789 de881df97768d0 Aravind Ramesh 2020-07-16 1790 /* de881df97768d0 Aravind Ramesh 2020-07-16 1791 * zone-capacity can be less than zone-size in zoned devices, de881df97768d0 Aravind Ramesh 2020-07-16 1792 * resulting in less than expected usable segments in the zone, 8c890c4c603427 Daeho Jeong 2024-09-09 1793 * calculate the end segno in the zone which can be garbage 8c890c4c603427 Daeho Jeong 2024-09-09 1794 * collected de881df97768d0 Aravind Ramesh 2020-07-16 1795 */ de881df97768d0 Aravind Ramesh 2020-07-16 1796 if (f2fs_sb_has_blkzoned(sbi)) 8c890c4c603427 Daeho Jeong 2024-09-09 1797 sec_end_segno -= SEGS_PER_SEC(sbi) - 2af583afcf9d54 liuderong 2024-09-11 1798 f2fs_usable_segs_in_sec(sbi); de881df97768d0 Aravind Ramesh 2020-07-16 1799 9748c2ddea4a3f Daeho Jeong 2024-09-09 1800 if (gc_type == BG_GC || one_time) { 2223fe652f7596 Daeho Jeong 2024-09-09 1801 unsigned int window_granularity = 8c890c4c603427 Daeho Jeong 2024-09-09 1802 sbi->migration_window_granularity; 8c890c4c603427 Daeho Jeong 2024-09-09 1803 2223fe652f7596 Daeho Jeong 2024-09-09 1804 if (f2fs_sb_has_blkzoned(sbi) && 2223fe652f7596 Daeho Jeong 2024-09-09 1805 !has_enough_free_blocks(sbi, 3d7bca9d583793 Chao Yu 2026-07-06 1806 sbi->gc_thread.boost_zoned_gc_percent)) 9a481a1c16f465 Daeho Jeong 2024-09-09 1807 window_granularity *= 3d7bca9d583793 Chao Yu 2026-07-06 1808 sbi->gc_thread.boost_gc_multiple; 2223fe652f7596 Daeho Jeong 2024-09-09 1809 2223fe652f7596 Daeho Jeong 2024-09-09 1810 end_segno = start_segno + window_granularity; 2223fe652f7596 Daeho Jeong 2024-09-09 1811 } 2223fe652f7596 Daeho Jeong 2024-09-09 1812 8c890c4c603427 Daeho Jeong 2024-09-09 1813 if (end_segno > sec_end_segno) 8c890c4c603427 Daeho Jeong 2024-09-09 1814 end_segno = sec_end_segno; 8c890c4c603427 Daeho Jeong 2024-09-09 1815 } 8c890c4c603427 Daeho Jeong 2024-09-09 1816 093749e296e29a Chao Yu 2020-08-04 1817 sanity_check_seg_type(sbi, get_seg_entry(sbi, segno)->type); 093749e296e29a Chao Yu 2020-08-04 1818 e48e16f3e37fac Daeho Jeong 2026-01-10 1819 segno = rounddown(segno, sbi->sums_per_block); e48e16f3e37fac Daeho Jeong 2026-01-10 1820 sum_blk_cnt = DIV_ROUND_UP(end_segno - segno, sbi->sums_per_block); 718e53fa633f84 Chao Yu 2016-01-23 1821 /* readahead multi ssa blocks those have contiguous address */ 2c70c5e3874e8c Chao Yu 2018-10-24 1822 if (__is_large_section(sbi)) 843ddf01eb4efc Chao Yu 2026-08-18 1823 f2fs_ra_meta_caches(sbi, GET_SUM_BLOCK(sbi, segno), 7ee8bc3942f209 Daeho Jeong 2025-11-11 1824 sum_blk_cnt, META_SSA, true); 718e53fa633f84 Chao Yu 2016-01-23 1825 718e53fa633f84 Chao Yu 2016-01-23 1826 /* reference all summary page */ 718e53fa633f84 Chao Yu 2016-01-23 1827 while (segno < end_segno) { 843ddf01eb4efc Chao Yu 2026-08-18 1828 struct f2fs_cached_block *sum_entry = 843ddf01eb4efc Chao Yu 2026-08-18 1829 f2fs_get_sum_cache(sbi, segno); 7ee8bc3942f209 Daeho Jeong 2025-11-11 1830 e48e16f3e37fac Daeho Jeong 2026-01-10 1831 segno += sbi->sums_per_block; 843ddf01eb4efc Chao Yu 2026-08-18 1832 if (IS_ERR(sum_entry)) { 843ddf01eb4efc Chao Yu 2026-08-18 1833 int err = PTR_ERR(sum_entry); edc55aaf0d1712 Jaegeuk Kim 2018-09-17 1834 e48e16f3e37fac Daeho Jeong 2026-01-10 1835 end_segno = segno - sbi->sums_per_block; e48e16f3e37fac Daeho Jeong 2026-01-10 1836 segno = rounddown(start_segno, sbi->sums_per_block); 7ee8bc3942f209 Daeho Jeong 2025-11-11 1837 while (segno < end_segno) { 843ddf01eb4efc Chao Yu 2026-08-18 1838 sum_entry = f2fs_find_meta_cache(sbi, edc55aaf0d1712 Jaegeuk Kim 2018-09-17 1839 GET_SUM_BLOCK(sbi, segno)); 843ddf01eb4efc Chao Yu 2026-08-18 1840 f2fs_put_cache(sum_entry, false); 843ddf01eb4efc Chao Yu 2026-08-18 1841 f2fs_put_cache(sum_entry, false); e48e16f3e37fac Daeho Jeong 2026-01-10 1842 segno += sbi->sums_per_block; edc55aaf0d1712 Jaegeuk Kim 2018-09-17 1843 } edc55aaf0d1712 Jaegeuk Kim 2018-09-17 1844 return err; edc55aaf0d1712 Jaegeuk Kim 2018-09-17 1845 } 843ddf01eb4efc Chao Yu 2026-08-18 1846 f2fs_unlock_cache(sum_entry); 843ddf01eb4efc Chao Yu 2026-08-18 1847 718e53fa633f84 Chao Yu 2016-01-23 1848 } 7bc0900347e069 Jaegeuk Kim 2012-11-02 1849 c718379b6b0954 Jaegeuk Kim 2013-04-24 1850 blk_start_plug(&plug); c718379b6b0954 Jaegeuk Kim 2013-04-24 1851 7ee8bc3942f209 Daeho Jeong 2025-11-11 1852 segno = start_segno; 7ee8bc3942f209 Daeho Jeong 2025-11-11 1853 while (segno < end_segno) { 7ee8bc3942f209 Daeho Jeong 2025-11-11 1854 unsigned int cur_segno; 843ddf01eb4efc Chao Yu 2026-08-18 1855 unsigned int block_end_segno; aa987273290d20 Jaegeuk Kim 2016-06-06 1856 718e53fa633f84 Chao Yu 2016-01-23 1857 /* find segment summary of victim */ 843ddf01eb4efc Chao Yu 2026-08-18 1858 struct f2fs_cached_block *sum_entry = 843ddf01eb4efc Chao Yu 2026-08-18 1859 f2fs_find_meta_cache(sbi, 718e53fa633f84 Chao Yu 2016-01-23 1860 GET_SUM_BLOCK(sbi, segno)); 843ddf01eb4efc Chao Yu 2026-08-18 1861 843ddf01eb4efc Chao Yu 2026-08-18 1862 f2fs_bug_on(sbi, IS_ERR(sum_entry)); 843ddf01eb4efc Chao Yu 2026-08-18 1863 843ddf01eb4efc Chao Yu 2026-08-18 1864 block_end_segno = rounddown(segno, sbi->sums_per_block) e48e16f3e37fac Daeho Jeong 2026-01-10 1865 + sbi->sums_per_block; 7ee8bc3942f209 Daeho Jeong 2025-11-11 1866 7ee8bc3942f209 Daeho Jeong 2025-11-11 1867 if (block_end_segno > end_segno) 7ee8bc3942f209 Daeho Jeong 2025-11-11 1868 block_end_segno = end_segno; 718e53fa633f84 Chao Yu 2016-01-23 1869 d625a2b08c0893 Chao Yu 2025-09-01 1870 if (is_cursec(sbi, GET_SEC_FROM_SEG(sbi, segno))) { d625a2b08c0893 Chao Yu 2025-09-01 1871 f2fs_err(sbi, "%s: segment %u is used by log", d625a2b08c0893 Chao Yu 2025-09-01 1872 __func__, segno); d625a2b08c0893 Chao Yu 2025-09-01 1873 f2fs_bug_on(sbi, 1); 7ee8bc3942f209 Daeho Jeong 2025-11-11 1874 goto next_block; d625a2b08c0893 Chao Yu 2025-09-01 1875 } d625a2b08c0893 Chao Yu 2025-09-01 1876 843ddf01eb4efc Chao Yu 2026-08-18 1877 if (!f2fs_cache_test_uptodate(sum_entry) || 7ee8bc3942f209 Daeho Jeong 2025-11-11 1878 unlikely(f2fs_cp_error(sbi))) 7ee8bc3942f209 Daeho Jeong 2025-11-11 1879 goto next_block; 7ee8bc3942f209 Daeho Jeong 2025-11-11 1880 7ee8bc3942f209 Daeho Jeong 2025-11-11 1881 for (cur_segno = segno; cur_segno < block_end_segno; 7ee8bc3942f209 Daeho Jeong 2025-11-11 1882 cur_segno++) { 7ee8bc3942f209 Daeho Jeong 2025-11-11 1883 struct f2fs_summary_block *sum; 7ee8bc3942f209 Daeho Jeong 2025-11-11 1884 7ee8bc3942f209 Daeho Jeong 2025-11-11 1885 if (get_valid_blocks(sbi, cur_segno, false) == 0) d6c66cd19ef322 Yunlong Song 2018-10-24 1886 goto freed; dabfbbc8f91450 Jaegeuk Kim 2020-02-09 1887 if (gc_type == BG_GC && __is_large_section(sbi) && e3080b0120a15e Chao Yu 2018-10-24 1888 migrated >= sbi->migration_granularity) 7ee8bc3942f209 Daeho Jeong 2025-11-11 1889 continue; de0dcc40f6e24d Jaegeuk Kim 2016-10-12 1890 5dfb768326b95c Daeho Jeong 2026-05-14 1891 if (migrated == 0) { 5dfb768326b95c Daeho Jeong 2026-05-14 1892 type = IS_DATASEG(get_seg_entry(sbi, cur_segno)->type) ? 5dfb768326b95c Daeho Jeong 2026-05-14 1893 SUM_TYPE_DATA : SUM_TYPE_NODE; 5dfb768326b95c Daeho Jeong 2026-05-14 1894 data_type = (type == SUM_TYPE_DATA) ? DATA : NODE; 5dfb768326b95c Daeho Jeong 2026-05-14 1895 } 5dfb768326b95c Daeho Jeong 2026-05-14 1896 843ddf01eb4efc Chao Yu 2026-08-18 @1897 sum = SUM_BLK_ENTRY_ADDR(sbi, sum_entry, cur_segno); e48e16f3e37fac Daeho Jeong 2026-01-10 1898 if (type != GET_SUM_TYPE(sum_footer(sbi, sum))) { 7ee8bc3942f209 Daeho Jeong 2025-11-11 1899 f2fs_err(sbi, "Inconsistent segment (%u) type " 98fd20b9cf472d Chao Yu 2026-06-15 1900 "[%d, %d] in SIT and SSA", 7ee8bc3942f209 Daeho Jeong 2025-11-11 1901 cur_segno, type, e48e16f3e37fac Daeho Jeong 2026-01-10 1902 GET_SUM_TYPE( e48e16f3e37fac Daeho Jeong 2026-01-10 1903 sum_footer(sbi, sum))); a9cfee0ef98e99 Chao Yu 2022-09-28 1904 f2fs_stop_checkpoint(sbi, false, a9cfee0ef98e99 Chao Yu 2022-09-28 1905 STOP_CP_REASON_CORRUPTED_SUMMARY); 7ee8bc3942f209 Daeho Jeong 2025-11-11 1906 continue; 10d255c3540239 Chao Yu 2018-07-04 1907 } 7bc0900347e069 Jaegeuk Kim 2012-11-02 1908 9236cac5666ea8 Jaegeuk Kim 2015-05-28 1909 /* 9236cac5666ea8 Jaegeuk Kim 2015-05-28 1910 * this is to avoid deadlock: 9236cac5666ea8 Jaegeuk Kim 2015-05-28 1911 * - lock_page(sum_page) - f2fs_replace_block 3d26fa6be3c487 Chao Yu 2017-10-30 1912 * - check_valid_map() - down_write(sentry_lock) 3d26fa6be3c487 Chao Yu 2017-10-30 1913 * - down_read(sentry_lock) - change_curseg() 9236cac5666ea8 Jaegeuk Kim 2015-05-28 1914 * - lock_page(sum_page) 9236cac5666ea8 Jaegeuk Kim 2015-05-28 1915 */ 718e53fa633f84 Chao Yu 2016-01-23 1916 if (type == SUM_TYPE_NODE) 7ee8bc3942f209 Daeho Jeong 2025-11-11 1917 submitted += gc_node_segment(sbi, sum->entries, 7ec199117c3254 Daeho Jeong 2025-12-30 1918 cur_segno, gc_type, &plug); 48018b4cfd07dd Chao Yu 2018-09-13 1919 else 7ee8bc3942f209 Daeho Jeong 2025-11-11 1920 submitted += gc_data_segment(sbi, sum->entries, 7ee8bc3942f209 Daeho Jeong 2025-11-11 1921 gc_list, cur_segno, 7ec199117c3254 Daeho Jeong 2025-12-30 1922 gc_type, force_migrate, &plug); c718379b6b0954 Jaegeuk Kim 2013-04-24 1923 9bf1dcbdfdc889 Chao Yu 2023-08-08 1924 stat_inc_gc_seg_count(sbi, data_type, gc_type); 07c6b5933ebf58 Daeho Jeong 2021-07-09 1925 sbi->gc_reclaimed_segs[sbi->gc_mode]++; 8c7b9ac129d096 Jaegeuk Kim 2020-02-09 1926 migrated++; c56f16dab0dfc8 Chao Yu 2017-08-11 1927 d6c66cd19ef322 Yunlong Song 2018-10-24 1928 freed: c56f16dab0dfc8 Chao Yu 2017-08-11 1929 if (gc_type == FG_GC && 7ee8bc3942f209 Daeho Jeong 2025-11-11 1930 get_valid_blocks(sbi, cur_segno, false) == 0) c56f16dab0dfc8 Chao Yu 2017-08-11 1931 seg_freed++; e3080b0120a15e Chao Yu 2018-10-24 1932 e219aecfd4b766 Yonggil Song 2022-11-22 1933 if (__is_large_section(sbi)) e219aecfd4b766 Yonggil Song 2022-11-22 1934 sbi->next_victim_seg[gc_type] = 7ee8bc3942f209 Daeho Jeong 2025-11-11 1935 (cur_segno + 1 < sec_end_segno) ? 7ee8bc3942f209 Daeho Jeong 2025-11-11 1936 cur_segno + 1 : NULL_SEGNO; 02d91398a602c3 Daeho Jeong 2026-03-16 1937 02d91398a602c3 Daeho Jeong 2026-03-16 1938 if (unlikely(freezing(current))) { 843ddf01eb4efc Chao Yu 2026-08-18 1939 f2fs_put_cache(sum_entry, false); 843ddf01eb4efc Chao Yu 2026-08-18 1940 f2fs_put_cache(sum_entry, false); 02d91398a602c3 Daeho Jeong 2026-03-16 1941 goto stop; 02d91398a602c3 Daeho Jeong 2026-03-16 1942 } 7ee8bc3942f209 Daeho Jeong 2025-11-11 1943 } 7ee8bc3942f209 Daeho Jeong 2025-11-11 1944 next_block: 843ddf01eb4efc Chao Yu 2026-08-18 1945 f2fs_put_cache(sum_entry, false); 843ddf01eb4efc Chao Yu 2026-08-18 1946 f2fs_put_cache(sum_entry, false); 7ee8bc3942f209 Daeho Jeong 2025-11-11 1947 segno = block_end_segno; 718e53fa633f84 Chao Yu 2016-01-23 1948 } 718e53fa633f84 Chao Yu 2016-01-23 1949 02d91398a602c3 Daeho Jeong 2026-03-16 1950 stop: 48018b4cfd07dd Chao Yu 2018-09-13 1951 if (submitted) 9bf1dcbdfdc889 Chao Yu 2023-08-08 1952 f2fs_submit_merged_write(sbi, data_type); 718e53fa633f84 Chao Yu 2016-01-23 1953 718e53fa633f84 Chao Yu 2016-01-23 1954 blk_finish_plug(&plug); 718e53fa633f84 Chao Yu 2016-01-23 1955 9bf1dcbdfdc889 Chao Yu 2023-08-08 1956 if (migrated) 9bf1dcbdfdc889 Chao Yu 2023-08-08 1957 stat_inc_gc_sec_count(sbi, data_type, gc_type); 17d899df4678a1 Chao Yu 2016-02-22 1958 c56f16dab0dfc8 Chao Yu 2017-08-11 1959 return seg_freed; 7bc0900347e069 Jaegeuk Kim 2012-11-02 1960 } 7bc0900347e069 Jaegeuk Kim 2012-11-02 1961 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki