{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions()\n\nWhen CONFIG_DAMON_VADDR_KUNIT_TEST=y and making CONFIG_DEBUG_KMEMLEAK=y\nand CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN=y, the below memory leak is detected.\n\nSince commit 9f86d624292c (\"mm/damon/vaddr-test: remove unnecessary\nvariables\"), the damon_destroy_ctx() is removed, but still call\ndamon_new_target() and damon_new_region(), the damon_region which is\nallocated by kmem_cache_alloc() in damon_new_region() and the damon_target\nwhich is allocated by kmalloc in damon_new_target() are not freed. And\nthe damon_region which is allocated in damon_new_region() in\ndamon_set_regions() is also not freed.\n\nSo use damon_destroy_target to free all the damon_regions and damon_target.\n\n unreferenced object 0xffff888107c9a940 (size 64):\n comm \"kunit_try_catch\", pid 1069, jiffies 4294670592 (age 732.761s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 06 00 00 00 6b 6b 6b 6b ............kkkk\n 60 c7 9c 07 81 88 ff ff f8 cb 9c 07 81 88 ff ff `...............\n backtrace:\n [] kmalloc_trace+0x27/0xa0\n [] damon_new_target+0x3f/0x1b0\n [] damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0\n [] damon_test_apply_three_regions1+0x21e/0x260\n [] kunit_generic_run_threadfn_adapter+0x4a/0x90\n [] kthread+0x2b6/0x380\n [] ret_from_fork+0x2d/0x70\n [] ret_from_fork_asm+0x11/0x20\n unreferenced object 0xffff8881079cc740 (size 56):\n comm \"kunit_try_catch\", pid 1069, jiffies 4294670592 (age 732.761s)\n hex dump (first 32 bytes):\n 05 00 00 00 00 00 00 00 14 00 00 00 00 00 00 00 ................\n 6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b kkkkkkkk....kkkk\n backtrace:\n [] damon_new_region+0x22/0x1c0\n [] damon_do_test_apply_three_regions.constprop.0+0xd1/0x3e0\n [] damon_test_apply_three_regions1+0x21e/0x260\n [] kunit_generic_run_threadfn_adapter+0x4a/0x90\n [] kthread+0x2b6/0x380\n [] ret_from_fork+0x2d/0x70\n [] ret_from_fork_asm+0x11/0x20\n unreferenced object 0xffff888107c9ac40 (size 64):\n comm \"kunit_try_catch\", pid 1071, jiffies 4294670595 (age 732.843s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 06 00 00 00 6b 6b 6b 6b ............kkkk\n a0 cc 9c 07 81 88 ff ff 78 a1 76 07 81 88 ff ff ........x.v.....\n backtrace:\n [] kmalloc_trace+0x27/0xa0\n [] damon_new_target+0x3f/0x1b0\n [] damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0\n [] damon_test_apply_three_regions2+0x21e/0x260\n [] kunit_generic_run_threadfn_adapter+0x4a/0x90\n [] kthread+0x2b6/0x380\n [] ret_from_fork+0x2d/0x70\n [] ret_from_fork_asm+0x11/0x20\n unreferenced object 0xffff8881079ccc80 (size 56):\n comm \"kunit_try_catch\", pid 1071, jiffies 4294670595 (age 732.843s)\n hex dump (first 32 bytes):\n 05 00 00 00 00 00 00 00 14 00 00 00 00 00 00 00 ................\n 6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b kkkkkkkk....kkkk\n backtrace:\n [] damon_new_region+0x22/0x1c0\n [] damon_do_test_apply_three_regions.constprop.0+0xd1/0x3e0\n [] damon_test_apply_three_regions2+0x21e/0x260\n [] kunit_generic_run_threadfn_adapter+0x4a/0x90\n [] kthread+0x2b6/0x380\n [] ret_from_fork+0x2d/0x70\n [] kmalloc_trace+0x27/0xa0\n [] damon_new_target+0x3f/0x1b0\n [] damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0\n [] damon_test_apply_three_regions1+0x21e/0x260\n [] kunit_generic_run_threadfn_adapter+0x4a/0x90\n [] kthread+0x2b6/0x380\n [] ret_from_fork+0x2d/0x70\n [] ret_from_fork_asm+0x11/0x20\n unreferenced object 0xffff8881079cc740 (size 56):\n comm \"kunit_try_catch\", pid 1069, jiffies 4294670592 (age 732.761s)\n hex dump (first 32 bytes):\n 05 00 00 00 00 00 00 00 14 00 00 00 00 00 00 00 ................\n 6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b kkkkkkkk....kkkk\n backtrace:\n [] damon_new_region+0x22/0x1c0\n [] damon_do_test_apply_three_regions.constprop.0+0xd1/0x3e0\n [] damon_test_apply_three_regions1+0x21e/0x260\n [] kunit_generic_run_threadfn_adapter+0x4a/0x90\n [] kthread+0x2b6/0x380\n [] ret_from_fork+0x2d/0x70\n [] ret_from_fork_asm+0x11/0x20\n unreferenced object 0xffff888107c9ac40 (size 64):\n comm \"kunit_try_catch\", pid 1071, jiffies 4294670595 (age 732.843s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 06 00 00 00 6b 6b 6b 6b ............kkkk\n a0 cc 9c 07 81 88 ff ff 78 a1 76 07 81 88 ff ff ........x.v.....\n backtrace:\n [] kmalloc_trace+0x27/0xa0\n [] damon_new_target+0x3f/0x1b0\n [] damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0\n [] damon_test_apply_three_regions2+0x21e/0x260\n [] kunit_generic_run_threadfn_adapter+0x4a/0x90\n [] kthread+0x2b6/0x380\n [] ret_from_fork+0x2d/0x70\n [] ret_from_fork_asm+0x11/0x20\n unreferenced object 0xffff8881079ccc80 (size 56):\n comm \"kunit_try_catch\", pid 1071, jiffies 4294670595 (age 732.843s)\n hex dump (first 32 bytes):\n 05 00 00 00 00 00 00 00 14 00 00 00 00 00 00 00 ................\n 6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b kkkkkkkk....kkkk\n backtrace:\n [] damon_new_region+0x22/0x1c0\n [] damon_do_test_apply_three_regions.constprop.0+0xd1/0x3e0\n [] damon_test_apply_three_regions2+0x21e/0x260\n [] kunit_generic_run_threadfn_adapter+0x4a/0x90\n [] kthread+0x2b6/0x380\n [] ret_from_fork+0x2d/0x70\n [