* [android-common:android16-6.12 1/1] mm/damon/tests/sysfs-kunit.h:80 damon_sysfs_test_add_targets() error: dereferencing freed memory 'sysfs_target' (line 79)
@ 2026-11-14 15:05 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-11-14 15:05 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
TO: cros-kernel-buildreports@googlegroups.com
tree: https://android.googlesource.com/kernel/common android16-6.12
head: 793c58ba801e0ec6ed0c3b71d1a1f091a42d299c
commit: 8a2944f5a54f0b3cece27a265e319c499ca40cb2 [1/1] mm/damon/tests/sysfs-kunit: handle alloc failures on damon_sysfs_test_add_targets()
:::::: branch date: 16 hours ago
:::::: commit date: 10 months ago
config: arm-randconfig-2200-20261113 (https://download.01.org/0day-ci/archive/20261114/202611141540.dikinyHI-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/202611141540.dikinyHI-lkp@intel.com/
smatch warnings:
mm/damon/tests/sysfs-kunit.h:80 damon_sysfs_test_add_targets() error: dereferencing freed memory 'sysfs_target' (line 79)
vim +/sysfs_target +80 mm/damon/tests/sysfs-kunit.h
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 40
2caef83db9f8e08 mm/damon/sysfs-test.h SeongJae Park 2024-06-18 41 static void damon_sysfs_test_add_targets(struct kunit *test)
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 42 {
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 43 struct damon_sysfs_targets *sysfs_targets;
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 44 struct damon_sysfs_target *sysfs_target;
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 45 struct damon_ctx *ctx;
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 46
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 47 sysfs_targets = damon_sysfs_targets_alloc();
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 48 if (!sysfs_targets)
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 49 kunit_skip(test, "sysfs_targets alloc fail");
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 50 sysfs_targets->nr = 1;
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 51 sysfs_targets->targets_arr = kmalloc_array(1,
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 52 sizeof(*sysfs_targets->targets_arr), GFP_KERNEL);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 53 if (!sysfs_targets->targets_arr) {
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 54 kfree(sysfs_targets);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 55 kunit_skip(test, "targets_arr alloc fail");
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 56 }
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 57
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 58 sysfs_target = damon_sysfs_target_alloc();
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 59 if (!sysfs_target) {
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 60 kfree(sysfs_targets->targets_arr);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 61 kfree(sysfs_targets);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 62 kunit_skip(test, "sysfs_target alloc fail");
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 63 }
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 64 sysfs_target->pid = __damon_sysfs_test_get_any_pid(12, 100);
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 65 sysfs_target->regions = damon_sysfs_regions_alloc();
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 66 if (!sysfs_target->regions) {
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 67 kfree(sysfs_targets->targets_arr);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 68 kfree(sysfs_targets);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 69 kfree(sysfs_target);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 70 kunit_skip(test, "sysfs_regions alloc fail");
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 71 }
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 72
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 73 sysfs_targets->targets_arr[0] = sysfs_target;
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 74
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 75 ctx = damon_new_ctx();
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 76 if (!ctx) {
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 77 kfree(sysfs_targets->targets_arr);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 78 kfree(sysfs_targets);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 @79 kfree(sysfs_target);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 @80 kfree(sysfs_target->regions);
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 81 kunit_skip(test, "ctx alloc fail");
8a2944f5a54f0b3 mm/damon/tests/sysfs-kunit.h SeongJae Park 2025-11-01 82 }
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 83
2caef83db9f8e08 mm/damon/sysfs-test.h SeongJae Park 2024-06-18 84 damon_sysfs_add_targets(ctx, sysfs_targets);
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 85 KUNIT_EXPECT_EQ(test, 1u, nr_damon_targets(ctx));
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 86
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 87 sysfs_target->pid = __damon_sysfs_test_get_any_pid(
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 88 sysfs_target->pid + 1, 200);
2caef83db9f8e08 mm/damon/sysfs-test.h SeongJae Park 2024-06-18 89 damon_sysfs_add_targets(ctx, sysfs_targets);
d96727a251fd2b9 mm/damon/sysfs-test.h SeongJae Park 2024-06-18 90 KUNIT_EXPECT_EQ(test, 2u, nr_damon_targets(ctx));
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 91
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 92 damon_destroy_ctx(ctx);
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 93 kfree(sysfs_targets->targets_arr);
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 94 kfree(sysfs_targets);
2d6a1c835685de3 mm/damon/tests/sysfs-kunit.h Jinjie Ruan 2024-10-10 95 kfree(sysfs_target->regions);
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 96 kfree(sysfs_target);
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 97 }
b8ee5575f763c23 mm/damon/sysfs-test.h SeongJae Park 2023-10-22 98
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-11-14 15:05 [android-common:android16-6.12 1/1] mm/damon/tests/sysfs-kunit.h:80 damon_sysfs_test_add_targets() error: dereferencing freed memory 'sysfs_target' (line 79) kernel test robot
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