Date
July 15, 2025, 11:35 a.m.
| Environment | |
|---|---|
| e850-96 | |
| qemu-arm64 | |
| qemu-x86_64 |
[ 51.436853] ================================================================== [ 51.437046] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 51.437175] Read of size 1 at addr ffff000801b9e000 by task kunit_try_catch/294 [ 51.440560] [ 51.442047] CPU: 6 UID: 0 PID: 294 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250715 #1 PREEMPT [ 51.442112] Tainted: [B]=BAD_PAGE, [N]=TEST [ 51.442128] Hardware name: WinLink E850-96 board (DT) [ 51.442149] Call trace: [ 51.442163] show_stack+0x20/0x38 (C) [ 51.442197] dump_stack_lvl+0x8c/0xd0 [ 51.442237] print_report+0x118/0x5d0 [ 51.442266] kasan_report+0xdc/0x128 [ 51.442295] __asan_report_load1_noabort+0x20/0x30 [ 51.442329] kmem_cache_rcu_uaf+0x388/0x468 [ 51.442360] kunit_try_run_case+0x170/0x3f0 [ 51.442393] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 51.442429] kthread+0x328/0x630 [ 51.442458] ret_from_fork+0x10/0x20 [ 51.442493] [ 51.506099] Allocated by task 294: [ 51.509488] kasan_save_stack+0x3c/0x68 [ 51.513302] kasan_save_track+0x20/0x40 [ 51.517123] kasan_save_alloc_info+0x40/0x58 [ 51.521375] __kasan_slab_alloc+0xa8/0xb0 [ 51.525368] kmem_cache_alloc_noprof+0x10c/0x398 [ 51.529968] kmem_cache_rcu_uaf+0x12c/0x468 [ 51.534135] kunit_try_run_case+0x170/0x3f0 [ 51.538302] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 51.543772] kthread+0x328/0x630 [ 51.546982] ret_from_fork+0x10/0x20 [ 51.550541] [ 51.552018] Freed by task 0: [ 51.554885] kasan_save_stack+0x3c/0x68 [ 51.558700] kasan_save_track+0x20/0x40 [ 51.562520] kasan_save_free_info+0x4c/0x78 [ 51.566687] __kasan_slab_free+0x6c/0x98 [ 51.570593] slab_free_after_rcu_debug+0xd4/0x2f8 [ 51.575280] rcu_core+0x9f4/0x1e20 [ 51.578666] rcu_core_si+0x18/0x30 [ 51.582051] handle_softirqs+0x374/0xb28 [ 51.585957] __do_softirq+0x1c/0x28 [ 51.589429] [ 51.590906] Last potentially related work creation: [ 51.595768] kasan_save_stack+0x3c/0x68 [ 51.599585] kasan_record_aux_stack+0xb4/0xc8 [ 51.603927] kmem_cache_free+0x120/0x468 [ 51.607833] kmem_cache_rcu_uaf+0x16c/0x468 [ 51.611999] kunit_try_run_case+0x170/0x3f0 [ 51.616165] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 51.621634] kthread+0x328/0x630 [ 51.624846] ret_from_fork+0x10/0x20 [ 51.628404] [ 51.629881] The buggy address belongs to the object at ffff000801b9e000 [ 51.629881] which belongs to the cache test_cache of size 200 [ 51.642297] The buggy address is located 0 bytes inside of [ 51.642297] freed 200-byte region [ffff000801b9e000, ffff000801b9e0c8) [ 51.654359] [ 51.655839] The buggy address belongs to the physical page: [ 51.661395] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x881b9e [ 51.669378] head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 51.677018] flags: 0xbfffe0000000040(head|node=0|zone=2|lastcpupid=0x1ffff) [ 51.683961] page_type: f5(slab) [ 51.687097] raw: 0bfffe0000000040 ffff000801b9c000 dead000000000122 0000000000000000 [ 51.694818] raw: 0000000000000000 00000000801f001f 00000000f5000000 0000000000000000 [ 51.702546] head: 0bfffe0000000040 ffff000801b9c000 dead000000000122 0000000000000000 [ 51.710354] head: 0000000000000000 00000000801f001f 00000000f5000000 0000000000000000 [ 51.718167] head: 0bfffe0000000001 fffffdffe006e781 00000000ffffffff 00000000ffffffff [ 51.725979] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 [ 51.733786] page dumped because: kasan: bad access detected [ 51.739342] [ 51.740816] Memory state around the buggy address: [ 51.745596] ffff000801b9df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.752800] ffff000801b9df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.760005] >ffff000801b9e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.767205] ^ [ 51.770420] ffff000801b9e080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 51.777625] ffff000801b9e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.784827] ==================================================================
[ 31.858749] ================================================================== [ 31.858847] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 31.858932] Read of size 1 at addr fff00000c6525000 by task kunit_try_catch/245 [ 31.858982] [ 31.859027] CPU: 0 UID: 0 PID: 245 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250715 #1 PREEMPT [ 31.859121] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.859149] Hardware name: linux,dummy-virt (DT) [ 31.859181] Call trace: [ 31.859207] show_stack+0x20/0x38 (C) [ 31.859262] dump_stack_lvl+0x8c/0xd0 [ 31.859315] print_report+0x118/0x5d0 [ 31.859359] kasan_report+0xdc/0x128 [ 31.859403] __asan_report_load1_noabort+0x20/0x30 [ 31.859470] kmem_cache_rcu_uaf+0x388/0x468 [ 31.859522] kunit_try_run_case+0x170/0x3f0 [ 31.859574] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.859661] kthread+0x328/0x630 [ 31.859712] ret_from_fork+0x10/0x20 [ 31.859978] [ 31.859999] Allocated by task 245: [ 31.860030] kasan_save_stack+0x3c/0x68 [ 31.860077] kasan_save_track+0x20/0x40 [ 31.860116] kasan_save_alloc_info+0x40/0x58 [ 31.860155] __kasan_slab_alloc+0xa8/0xb0 [ 31.860191] kmem_cache_alloc_noprof+0x10c/0x398 [ 31.860261] kmem_cache_rcu_uaf+0x12c/0x468 [ 31.860302] kunit_try_run_case+0x170/0x3f0 [ 31.860340] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.860390] kthread+0x328/0x630 [ 31.860432] ret_from_fork+0x10/0x20 [ 31.860489] [ 31.860508] Freed by task 0: [ 31.860534] kasan_save_stack+0x3c/0x68 [ 31.860581] kasan_save_track+0x20/0x40 [ 31.860618] kasan_save_free_info+0x4c/0x78 [ 31.860656] __kasan_slab_free+0x6c/0x98 [ 31.860694] slab_free_after_rcu_debug+0xd4/0x2f8 [ 31.860744] rcu_core+0x9f4/0x1e20 [ 31.860782] rcu_core_si+0x18/0x30 [ 31.860815] handle_softirqs+0x374/0xb28 [ 31.860853] __do_softirq+0x1c/0x28 [ 31.860886] [ 31.860905] Last potentially related work creation: [ 31.860962] kasan_save_stack+0x3c/0x68 [ 31.861012] kasan_record_aux_stack+0xb4/0xc8 [ 31.861170] kmem_cache_free+0x120/0x468 [ 31.861207] kmem_cache_rcu_uaf+0x16c/0x468 [ 31.861253] kunit_try_run_case+0x170/0x3f0 [ 31.861430] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.861690] kthread+0x328/0x630 [ 31.861739] ret_from_fork+0x10/0x20 [ 31.861776] [ 31.861796] The buggy address belongs to the object at fff00000c6525000 [ 31.861796] which belongs to the cache test_cache of size 200 [ 31.861855] The buggy address is located 0 bytes inside of [ 31.861855] freed 200-byte region [fff00000c6525000, fff00000c65250c8) [ 31.861917] [ 31.861938] The buggy address belongs to the physical page: [ 31.861971] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106525 [ 31.862029] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.862081] page_type: f5(slab) [ 31.862124] raw: 0bfffe0000000000 fff00000c5c5cb40 dead000000000122 0000000000000000 [ 31.862173] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 31.862214] page dumped because: kasan: bad access detected [ 31.862244] [ 31.862262] Memory state around the buggy address: [ 31.862295] fff00000c6524f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.862339] fff00000c6524f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.862382] >fff00000c6525000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.862417] ^ [ 31.862457] fff00000c6525080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.862601] fff00000c6525100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.862708] ==================================================================
[ 24.836913] ================================================================== [ 24.837455] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 24.838037] Read of size 1 at addr ffff8881060a6000 by task kunit_try_catch/261 [ 24.838650] [ 24.838913] CPU: 1 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250715 #1 PREEMPT(voluntary) [ 24.838983] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.838996] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.839129] Call Trace: [ 24.839147] <TASK> [ 24.839168] dump_stack_lvl+0x73/0xb0 [ 24.839202] print_report+0xd1/0x610 [ 24.839227] ? __virt_addr_valid+0x1db/0x2d0 [ 24.839254] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 24.839277] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.839303] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 24.839326] kasan_report+0x141/0x180 [ 24.839348] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 24.839376] __asan_report_load1_noabort+0x18/0x20 [ 24.839401] kmem_cache_rcu_uaf+0x3e3/0x510 [ 24.839424] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 24.839446] ? finish_task_switch.isra.0+0x153/0x700 [ 24.839468] ? __switch_to+0x47/0xf80 [ 24.839498] ? __pfx_read_tsc+0x10/0x10 [ 24.839534] ? ktime_get_ts64+0x86/0x230 [ 24.839561] kunit_try_run_case+0x1a5/0x480 [ 24.839749] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.839773] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 24.839797] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.839819] ? __kthread_parkme+0x82/0x180 [ 24.839841] ? preempt_count_sub+0x50/0x80 [ 24.839865] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.839888] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.839914] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.839940] kthread+0x337/0x6f0 [ 24.839960] ? trace_preempt_on+0x20/0xc0 [ 24.839985] ? __pfx_kthread+0x10/0x10 [ 24.840006] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.840031] ? calculate_sigpending+0x7b/0xa0 [ 24.840055] ? __pfx_kthread+0x10/0x10 [ 24.840076] ret_from_fork+0x116/0x1d0 [ 24.840096] ? __pfx_kthread+0x10/0x10 [ 24.840117] ret_from_fork_asm+0x1a/0x30 [ 24.840149] </TASK> [ 24.840161] [ 24.850920] Allocated by task 261: [ 24.851090] kasan_save_stack+0x45/0x70 [ 24.851345] kasan_save_track+0x18/0x40 [ 24.851558] kasan_save_alloc_info+0x3b/0x50 [ 24.851779] __kasan_slab_alloc+0x91/0xa0 [ 24.852315] kmem_cache_alloc_noprof+0x123/0x3f0 [ 24.852619] kmem_cache_rcu_uaf+0x155/0x510 [ 24.853013] kunit_try_run_case+0x1a5/0x480 [ 24.853207] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.853765] kthread+0x337/0x6f0 [ 24.854402] ret_from_fork+0x116/0x1d0 [ 24.854956] ret_from_fork_asm+0x1a/0x30 [ 24.855441] [ 24.855571] Freed by task 0: [ 24.856038] kasan_save_stack+0x45/0x70 [ 24.856328] kasan_save_track+0x18/0x40 [ 24.856502] kasan_save_free_info+0x3f/0x60 [ 24.856990] __kasan_slab_free+0x56/0x70 [ 24.857283] slab_free_after_rcu_debug+0xe4/0x310 [ 24.857593] rcu_core+0x66f/0x1c40 [ 24.857724] rcu_core_si+0x12/0x20 [ 24.857840] handle_softirqs+0x209/0x730 [ 24.857971] __irq_exit_rcu+0xc9/0x110 [ 24.858451] irq_exit_rcu+0x12/0x20 [ 24.858830] sysvec_apic_timer_interrupt+0x81/0x90 [ 24.859054] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 24.859247] [ 24.859312] Last potentially related work creation: [ 24.859456] kasan_save_stack+0x45/0x70 [ 24.859598] kasan_record_aux_stack+0xb2/0xc0 [ 24.859739] kmem_cache_free+0x131/0x420 [ 24.859868] kmem_cache_rcu_uaf+0x194/0x510 [ 24.860003] kunit_try_run_case+0x1a5/0x480 [ 24.860137] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.860301] kthread+0x337/0x6f0 [ 24.860410] ret_from_fork+0x116/0x1d0 [ 24.861643] ret_from_fork_asm+0x1a/0x30 [ 24.862404] [ 24.862491] The buggy address belongs to the object at ffff8881060a6000 [ 24.862491] which belongs to the cache test_cache of size 200 [ 24.864083] The buggy address is located 0 bytes inside of [ 24.864083] freed 200-byte region [ffff8881060a6000, ffff8881060a60c8) [ 24.864439] [ 24.864507] The buggy address belongs to the physical page: [ 24.865428] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1060a6 [ 24.866455] flags: 0x200000000000000(node=0|zone=2) [ 24.867256] page_type: f5(slab) [ 24.867632] raw: 0200000000000000 ffff888101e20280 dead000000000122 0000000000000000 [ 24.867867] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 24.868825] page dumped because: kasan: bad access detected [ 24.869221] [ 24.869288] Memory state around the buggy address: [ 24.869441] ffff8881060a5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.869999] ffff8881060a5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.870715] >ffff8881060a6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.870925] ^ [ 24.871037] ffff8881060a6080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.871242] ffff8881060a6100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.871448] ==================================================================