CVE-2023-52560

In the Linux kernel, the following vulnerability has been resolved:
mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions()
When CONFIG_DAMON_VADDR_KUNIT_TEST=y and making CONFIG_DEBUG_KMEMLEAK=y and
CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN=y, the below memory leak is detected. Since
commit 9f86d624292c (“mm/damon/vaddr-test: remove unnecessary variables”),
the damon_destroy_ctx() is removed, but still call damon_new_target() and
damon_new_region(), the damon_region which is allocated by
kmem_cache_alloc() in damon_new_region() and the damon_target which is
allocated by kmalloc in damon_new_target() are not freed. And the
damon_region which is allocated in damon_new_region() in
damon_set_regions() is also not freed. So use damon_destroy_target to free
all the damon_regions and damon_target. unreferenced object
0xffff888107c9a940 (size 64): comm “kunit_try_catch”, pid 1069, jiffies
4294670592 (age 732.761s) hex dump (first 32 bytes): 00 00 00 00 00 00 00
00 06 00 00 00 6b 6b 6b 6b …kkkk 60 c7 9c 07 81 88 ff ff f8 cb
9c 07 81 88 ff ff `… backtrace: [<ffffffff817e0167>]
kmalloc_trace+0x27/0xa0 [<ffffffff819c11cf>] damon_new_target+0x3f/0x1b0
[<ffffffff819c7d55>]
damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0
[<ffffffff819c82be>] damon_test_apply_three_regions1+0x21e/0x260
[<ffffffff829fce6a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81237cf6>] kthread+0x2b6/0x380 [<ffffffff81097add>]
ret_from_fork+0x2d/0x70 [<ffffffff81003791>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff8881079cc740 (size 56): comm “kunit_try_catch”,
pid 1069, jiffies 4294670592 (age 732.761s) hex dump (first 32 bytes): 05
00 00 00 00 00 00 00 14 00 00 00 00 00 00 00 … 6b 6b 6b 6b
6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b kkkkkkkk…kkkk backtrace:
[<ffffffff819bc492>] damon_new_region+0x22/0x1c0 [<ffffffff819c7d91>]
damon_do_test_apply_three_regions.constprop.0+0xd1/0x3e0
[<ffffffff819c82be>] damon_test_apply_three_regions1+0x21e/0x260
[<ffffffff829fce6a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81237cf6>] kthread+0x2b6/0x380 [<ffffffff81097add>]
ret_from_fork+0x2d/0x70 [<ffffffff81003791>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff888107c9ac40 (size 64): comm “kunit_try_catch”,
pid 1071, jiffies 4294670595 (age 732.843s) hex dump (first 32 bytes): 00
00 00 00 00 00 00 00 06 00 00 00 6b 6b 6b 6b …kkkk a0 cc 9c 07
81 88 ff ff 78 a1 76 07 81 88 ff ff …x.v… backtrace:
[<ffffffff817e0167>] kmalloc_trace+0x27/0xa0 [<ffffffff819c11cf>]
damon_new_target+0x3f/0x1b0 [<ffffffff819c7d55>]
damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0
[<ffffffff819c851e>] damon_test_apply_three_regions2+0x21e/0x260
[<ffffffff829fce6a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81237cf6>] kthread+0x2b6/0x380 [<ffffffff81097add>]
ret_from_fork+0x2d/0x70 [<ffffffff81003791>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff8881079ccc80 (size 56): comm “kunit_try_catch”,
pid 1071, jiffies 4294670595 (age 732.843s) hex dump (first 32 bytes): 05
00 00 00 00 00 00 00 14 00 00 00 00 00 00 00 … 6b 6b 6b 6b
6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b kkkkkkkk…kkkk backtrace:
[<ffffffff819bc492>] damon_new_region+0x22/0x1c0 [<ffffffff819c7d91>]
damon_do_test_apply_three_regions.constprop.0+0xd1/0x3e0
[<ffffffff819c851e>] damon_test_apply_three_regions2+0x21e/0x260
[<ffffffff829fce6a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81237cf6>] kthread+0x2b6/0x380 [<ffffffff81097add>]
ret_from_fork+0x2d/0x70 [<ffff —truncated—