Date
July 23, 2025, 3:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.955874] ================================================================== [ 31.955971] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x174/0x300 [ 31.956049] Read of size 1 at addr fff00000c5c24a00 by task kunit_try_catch/248 [ 31.956102] [ 31.956142] CPU: 0 UID: 0 PID: 248 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250723 #1 PREEMPT [ 31.956236] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 31.956268] Hardware name: linux,dummy-virt (DT) [ 31.956301] Call trace: [ 31.956327] show_stack+0x20/0x38 (C) [ 31.956379] dump_stack_lvl+0x8c/0xd0 [ 31.956430] print_report+0x118/0x5e8 [ 31.956474] kasan_report+0xdc/0x128 [ 31.956516] __kasan_check_byte+0x54/0x70 [ 31.956573] kmem_cache_destroy+0x34/0x218 [ 31.956622] kmem_cache_double_destroy+0x174/0x300 [ 31.956672] kunit_try_run_case+0x170/0x3f0 [ 31.956721] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.956773] kthread+0x328/0x630 [ 31.956815] ret_from_fork+0x10/0x20 [ 31.956865] [ 31.956884] Allocated by task 248: [ 31.956929] kasan_save_stack+0x3c/0x68 [ 31.956971] kasan_save_track+0x20/0x40 [ 31.957007] kasan_save_alloc_info+0x40/0x58 [ 31.957044] __kasan_slab_alloc+0xa8/0xb0 [ 31.957078] kmem_cache_alloc_noprof+0x10c/0x398 [ 31.957122] __kmem_cache_create_args+0x178/0x280 [ 31.957162] kmem_cache_double_destroy+0xc0/0x300 [ 31.957201] kunit_try_run_case+0x170/0x3f0 [ 31.957240] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.957283] kthread+0x328/0x630 [ 31.957315] ret_from_fork+0x10/0x20 [ 31.957351] [ 31.957369] Freed by task 248: [ 31.957394] kasan_save_stack+0x3c/0x68 [ 31.957429] kasan_save_track+0x20/0x40 [ 31.957463] kasan_save_free_info+0x4c/0x78 [ 31.957501] __kasan_slab_free+0x6c/0x98 [ 31.957537] kmem_cache_free+0x260/0x468 [ 31.957574] slab_kmem_cache_release+0x38/0x50 [ 31.957615] kmem_cache_release+0x1c/0x30 [ 31.957652] kobject_put+0x17c/0x420 [ 31.957690] sysfs_slab_release+0x1c/0x30 [ 31.957725] kmem_cache_destroy+0x118/0x218 [ 31.957764] kmem_cache_double_destroy+0x128/0x300 [ 31.957804] kunit_try_run_case+0x170/0x3f0 [ 31.957841] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.957882] kthread+0x328/0x630 [ 31.957929] ret_from_fork+0x10/0x20 [ 31.957964] [ 31.957983] The buggy address belongs to the object at fff00000c5c24a00 [ 31.957983] which belongs to the cache kmem_cache of size 208 [ 31.958042] The buggy address is located 0 bytes inside of [ 31.958042] freed 208-byte region [fff00000c5c24a00, fff00000c5c24ad0) [ 31.958103] [ 31.958124] The buggy address belongs to the physical page: [ 31.958164] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105c24 [ 31.958221] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.958274] page_type: f5(slab) [ 31.958314] raw: 0bfffe0000000000 fff00000c0001000 dead000000000122 0000000000000000 [ 31.958376] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 31.958417] page dumped because: kasan: bad access detected [ 31.958449] [ 31.958467] Memory state around the buggy address: [ 31.958500] fff00000c5c24900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.958543] fff00000c5c24980: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.958587] >fff00000c5c24a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.958624] ^ [ 31.958654] fff00000c5c24a80: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.958696] fff00000c5c24b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.958736] ==================================================================
[ 26.074602] ================================================================== [ 26.075163] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x1bf/0x380 [ 26.075558] Read of size 1 at addr ffff888101dc6500 by task kunit_try_catch/264 [ 26.076632] [ 26.076873] CPU: 0 UID: 0 PID: 264 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250723 #1 PREEMPT(voluntary) [ 26.076948] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.077138] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.077176] Call Trace: [ 26.077191] <TASK> [ 26.077234] dump_stack_lvl+0x73/0xb0 [ 26.077280] print_report+0xd1/0x640 [ 26.077305] ? __virt_addr_valid+0x1db/0x2d0 [ 26.077460] ? kmem_cache_double_destroy+0x1bf/0x380 [ 26.077488] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.077514] ? kmem_cache_double_destroy+0x1bf/0x380 [ 26.077538] kasan_report+0x141/0x180 [ 26.077561] ? kmem_cache_double_destroy+0x1bf/0x380 [ 26.077588] ? kmem_cache_double_destroy+0x1bf/0x380 [ 26.077612] __kasan_check_byte+0x3d/0x50 [ 26.077634] kmem_cache_destroy+0x25/0x1d0 [ 26.077663] kmem_cache_double_destroy+0x1bf/0x380 [ 26.077687] ? __pfx_kmem_cache_double_destroy+0x10/0x10 [ 26.077710] ? finish_task_switch.isra.0+0x153/0x700 [ 26.077734] ? __switch_to+0x47/0xf80 [ 26.077763] ? __pfx_read_tsc+0x10/0x10 [ 26.077786] ? ktime_get_ts64+0x86/0x230 [ 26.077812] kunit_try_run_case+0x1a5/0x480 [ 26.077839] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.077860] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 26.077888] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.077914] ? __kthread_parkme+0x82/0x180 [ 26.077934] ? preempt_count_sub+0x50/0x80 [ 26.077965] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.077988] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.078013] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.078038] kthread+0x337/0x6f0 [ 26.078058] ? trace_preempt_on+0x20/0xc0 [ 26.078083] ? __pfx_kthread+0x10/0x10 [ 26.078104] ? _raw_spin_unlock_irq+0x47/0x80 [ 26.078127] ? calculate_sigpending+0x7b/0xa0 [ 26.078163] ? __pfx_kthread+0x10/0x10 [ 26.078185] ret_from_fork+0x116/0x1d0 [ 26.078205] ? __pfx_kthread+0x10/0x10 [ 26.078225] ret_from_fork_asm+0x1a/0x30 [ 26.078257] </TASK> [ 26.078269] [ 26.094045] Allocated by task 264: [ 26.094411] kasan_save_stack+0x45/0x70 [ 26.094900] kasan_save_track+0x18/0x40 [ 26.095324] kasan_save_alloc_info+0x3b/0x50 [ 26.095718] __kasan_slab_alloc+0x91/0xa0 [ 26.095863] kmem_cache_alloc_noprof+0x123/0x3f0 [ 26.096345] __kmem_cache_create_args+0x169/0x240 [ 26.096890] kmem_cache_double_destroy+0xd5/0x380 [ 26.097116] kunit_try_run_case+0x1a5/0x480 [ 26.097271] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.097437] kthread+0x337/0x6f0 [ 26.097548] ret_from_fork+0x116/0x1d0 [ 26.097673] ret_from_fork_asm+0x1a/0x30 [ 26.098186] [ 26.098340] Freed by task 264: [ 26.098802] kasan_save_stack+0x45/0x70 [ 26.099254] kasan_save_track+0x18/0x40 [ 26.099754] kasan_save_free_info+0x3f/0x60 [ 26.100218] __kasan_slab_free+0x56/0x70 [ 26.100703] kmem_cache_free+0x249/0x420 [ 26.101127] slab_kmem_cache_release+0x2e/0x40 [ 26.101663] kmem_cache_release+0x16/0x20 [ 26.102123] kobject_put+0x181/0x450 [ 26.102395] sysfs_slab_release+0x16/0x20 [ 26.102815] kmem_cache_destroy+0xf0/0x1d0 [ 26.103204] kmem_cache_double_destroy+0x14e/0x380 [ 26.103388] kunit_try_run_case+0x1a5/0x480 [ 26.103527] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.103746] kthread+0x337/0x6f0 [ 26.104183] ret_from_fork+0x116/0x1d0 [ 26.104660] ret_from_fork_asm+0x1a/0x30 [ 26.105082] [ 26.105291] The buggy address belongs to the object at ffff888101dc6500 [ 26.105291] which belongs to the cache kmem_cache of size 208 [ 26.106613] The buggy address is located 0 bytes inside of [ 26.106613] freed 208-byte region [ffff888101dc6500, ffff888101dc65d0) [ 26.106983] [ 26.107254] The buggy address belongs to the physical page: [ 26.107818] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101dc6 [ 26.108812] flags: 0x200000000000000(node=0|zone=2) [ 26.109419] page_type: f5(slab) [ 26.109554] raw: 0200000000000000 ffff888100041000 dead000000000122 0000000000000000 [ 26.109773] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 26.110107] page dumped because: kasan: bad access detected [ 26.110808] [ 26.111042] Memory state around the buggy address: [ 26.111553] ffff888101dc6400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.112326] ffff888101dc6480: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.113086] >ffff888101dc6500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.113593] ^ [ 26.113716] ffff888101dc6580: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.113923] ffff888101dc6600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.114761] ==================================================================