* [tytso-ext4:pu 20/50] fs/ext4/resize-test.c:740 resize_test_init() error: dereferencing freed memory 'sbh' (line 738)
@ 2026-11-13 3:38 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-11-13 3:38 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp, Dan Carpenter
Unfiltered warning: this smatch report is sent as-is and has not been
reviewed for false positives, so please treat it with due skepticism.
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-ext4@vger.kernel.org
TO: "Theodore Ts'o" <tytso@mit.edu>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git pu
head: 246d715a48c25a74ac372dda5e10d8f69f89b50a
commit: cafbd5ed7e5d5024b861114d03d2980d6c6fffe2 [20/50] ext4: add KUnit tests for fs/ext4/resize.c
:::::: branch date: 35 hours ago
:::::: commit date: 35 hours ago
config: powerpc-randconfig-2200-20261112 (https://download.01.org/0day-ci/archive/20261113/202611130427.OFf1j9Zw-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 8621950157210c1fa68f20f0614cb51310ec9dff)
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 <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202611130427.OFf1j9Zw-lkp@intel.com/
smatch warnings:
fs/ext4/resize-test.c:740 resize_test_init() error: dereferencing freed memory 'sbh' (line 738)
vim +/sbh +740 fs/ext4/resize-test.c
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 687
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 688 strscpy(sb->s_id, "ext4_resize_kunit", sizeof(sb->s_id));
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 689 inode_init_once(&ctx->bd_inode);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 690 ctx->bd_inode.i_sb = sb;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 691 ctx->bd_inode.i_blkbits = RESIZE_TEST_BLK_BITS;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 692 ctx->bd_inode.i_mapping = &ctx->bd_inode.i_data;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 693 ctx->bd_inode.i_data.host = &ctx->bd_inode;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 694 ctx->bdev_disk.part0 = &ctx->bdev;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 695 ctx->bdev_disk.queue = &ctx->bdev_queue;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 696 ctx->bdev.bd_disk = &ctx->bdev_disk;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 697 ctx->bdev.bd_queue = &ctx->bdev_queue;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 698 ctx->bdev.bd_mapping = &ctx->bd_inode.i_data;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 699 bdev_clear_flag(&ctx->bdev, BD_READ_ONLY);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 700 sb->s_bdev = &ctx->bdev;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 701
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 702 sbi->s_sb = sb;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 703 sbi->s_blockgroup_lock = &ctx->bgl;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 704 bgl_lock_init(&ctx->bgl);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 705 INIT_WORK(&sbi->s_sb_upd_work, resize_test_sb_upd_work);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 706 timer_setup(&sbi->s_err_report, resize_test_err_timer, 0);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 707 spin_lock_init(&sbi->s_error_lock);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 708 spin_lock_init(&sbi->s_md_lock);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 709 spin_lock_init(&sbi->s_bdev_wb_lock);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 710 spin_lock_init(&sbi->s_es_lock);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 711 INIT_LIST_HEAD(&sbi->s_es_list);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 712 mutex_init(&sbi->s_fc_lock);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 713 INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 714 INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 715 INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 716 INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 717 ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 718 ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 719 ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 720
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 721 sbi->s_blocks_per_group = RESIZE_TEST_BLOCKS_PER_GRP;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 722 sbi->s_clusters_per_group = RESIZE_TEST_BLOCKS_PER_GRP;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 723 sbi->s_cluster_ratio = 1;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 724 sbi->s_cluster_bits = 0;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 725 sbi->s_inodes_per_group = RESIZE_TEST_INODES_PER_GRP;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 726 sbi->s_inode_size = RESIZE_TEST_INODE_SIZE;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 727 sbi->s_inodes_per_block = RESIZE_TEST_BLK_SIZE / RESIZE_TEST_INODE_SIZE;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 728 sbi->s_itb_per_group = RESIZE_TEST_ITB_PER_GRP;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 729 sbi->s_desc_size = RESIZE_TEST_DESC_SIZE;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 730 sbi->s_desc_per_block = RESIZE_TEST_DESC_PER_BLK;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 731 sbi->s_desc_per_block_bits = RESIZE_TEST_DESC_PER_BLK_BITS;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 732 sbi->s_first_ino = 11;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 733 sbi->s_mount_state = EXT4_VALID_FS;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 734 set_opt(sb, ERRORS_CONT);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 735
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 736 sbh = resize_get_or_create_bh(ctx, RESIZE_TEST_FIRST_DATA_BLK);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 737 KUNIT_ASSERT_NOT_NULL(test, sbh);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 @738 brelse(sbh);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 739 sbi->s_sbh = sbh;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 @740 ctx->es = (struct ext4_super_block *)sbh->b_data;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 741 sbi->s_es = ctx->es;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 742
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 743 resize_init_mock_bh(&ctx->iloc_bh, ctx->bh_folio, ctx->iloc_buf,
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 744 RESIZE_TEST_BLK_SIZE, 99);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 745
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 746 active_resize_test = test;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 747 kunit_activate_static_stub(test, ext4_sb_getblk, resize_sb_getblk_stub);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 748 kunit_activate_static_stub(test, ext4_sb_bread, resize_sb_bread_stub);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 749 kunit_activate_static_stub(test, ext4_resize_issue_zeroout,
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 750 resize_zeroout_stub);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 751 kunit_activate_static_stub(test, __ext4_iget, resize_iget_stub);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 752 kunit_activate_static_stub(test, ext4_get_inode_loc,
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 753 resize_get_inode_loc_stub);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 754 kunit_activate_static_stub(test, ext4_mark_iloc_dirty,
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 755 resize_mark_iloc_dirty_stub);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 756 kunit_activate_static_stub(test, __ext4_mark_inode_dirty,
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 757 resize_mark_inode_dirty_stub);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 758 kunit_activate_static_stub(test, ext4_free_blocks,
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 759 resize_free_blocks_stub);
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 760
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 761 return 0;
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 762 }
cafbd5ed7e5d50 Theodore Ts'o 2026-11-11 763
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-11-13 3:38 [tytso-ext4:pu 20/50] fs/ext4/resize-test.c:740 resize_test_init() error: dereferencing freed memory 'sbh' (line 738) kernel test robot
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