Date
July 19, 2025, 11:11 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.574280] ================================================================== [ 16.574393] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 16.574477] Read of size 1 at addr fff00000c63c2000 by task kunit_try_catch/214 [ 16.574544] [ 16.574589] CPU: 0 UID: 0 PID: 214 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.574674] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.574702] Hardware name: linux,dummy-virt (DT) [ 16.574736] Call trace: [ 16.574762] show_stack+0x20/0x38 (C) [ 16.574816] dump_stack_lvl+0x8c/0xd0 [ 16.574867] print_report+0x118/0x5d0 [ 16.574914] kasan_report+0xdc/0x128 [ 16.574960] __asan_report_load1_noabort+0x20/0x30 [ 16.575012] kmem_cache_rcu_uaf+0x388/0x468 [ 16.575058] kunit_try_run_case+0x170/0x3f0 [ 16.575110] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.575163] kthread+0x328/0x630 [ 16.575207] ret_from_fork+0x10/0x20 [ 16.575256] [ 16.575274] Allocated by task 214: [ 16.575306] kasan_save_stack+0x3c/0x68 [ 16.575349] kasan_save_track+0x20/0x40 [ 16.575386] kasan_save_alloc_info+0x40/0x58 [ 16.575426] __kasan_slab_alloc+0xa8/0xb0 [ 16.575464] kmem_cache_alloc_noprof+0x10c/0x398 [ 16.575505] kmem_cache_rcu_uaf+0x12c/0x468 [ 16.575558] kunit_try_run_case+0x170/0x3f0 [ 16.575594] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.575638] kthread+0x328/0x630 [ 16.575669] ret_from_fork+0x10/0x20 [ 16.575705] [ 16.575724] Freed by task 0: [ 16.575752] kasan_save_stack+0x3c/0x68 [ 16.575789] kasan_save_track+0x20/0x40 [ 16.575828] kasan_save_free_info+0x4c/0x78 [ 16.575867] __kasan_slab_free+0x6c/0x98 [ 16.575906] slab_free_after_rcu_debug+0xd4/0x2f8 [ 16.575945] rcu_core+0x9f4/0x1e20 [ 16.575984] rcu_core_si+0x18/0x30 [ 16.576018] handle_softirqs+0x374/0xb28 [ 16.576057] __do_softirq+0x1c/0x28 [ 16.576091] [ 16.576111] Last potentially related work creation: [ 16.576138] kasan_save_stack+0x3c/0x68 [ 16.576175] kasan_record_aux_stack+0xb4/0xc8 [ 16.576216] kmem_cache_free+0x120/0x468 [ 16.576251] kmem_cache_rcu_uaf+0x16c/0x468 [ 16.576290] kunit_try_run_case+0x170/0x3f0 [ 16.576328] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.576369] kthread+0x328/0x630 [ 16.576402] ret_from_fork+0x10/0x20 [ 16.576436] [ 16.576457] The buggy address belongs to the object at fff00000c63c2000 [ 16.576457] which belongs to the cache test_cache of size 200 [ 16.576517] The buggy address is located 0 bytes inside of [ 16.576517] freed 200-byte region [fff00000c63c2000, fff00000c63c20c8) [ 16.576586] [ 16.576608] The buggy address belongs to the physical page: [ 16.576642] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1063c2 [ 16.576697] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.576750] page_type: f5(slab) [ 16.576793] raw: 0bfffe0000000000 fff00000c1b47500 dead000000000122 0000000000000000 [ 16.576845] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 16.576887] page dumped because: kasan: bad access detected [ 16.576917] [ 16.576936] Memory state around the buggy address: [ 16.576970] fff00000c63c1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.577015] fff00000c63c1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.577059] >fff00000c63c2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.577099] ^ [ 16.577128] fff00000c63c2080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 16.577170] fff00000c63c2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.577209] ==================================================================
[ 12.830419] ================================================================== [ 12.831878] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.833081] Read of size 1 at addr ffff8881027f3000 by task kunit_try_catch/231 [ 12.833959] [ 12.834245] CPU: 0 UID: 0 PID: 231 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.834317] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.834329] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.834353] Call Trace: [ 12.834373] <TASK> [ 12.834392] dump_stack_lvl+0x73/0xb0 [ 12.834430] print_report+0xd1/0x610 [ 12.834452] ? __virt_addr_valid+0x1db/0x2d0 [ 12.834477] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.834509] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.834533] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.834557] kasan_report+0x141/0x180 [ 12.834578] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.834605] __asan_report_load1_noabort+0x18/0x20 [ 12.834628] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.834652] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.834675] ? finish_task_switch.isra.0+0x153/0x700 [ 12.834699] ? __switch_to+0x47/0xf50 [ 12.834728] ? __pfx_read_tsc+0x10/0x10 [ 12.834748] ? ktime_get_ts64+0x86/0x230 [ 12.834773] kunit_try_run_case+0x1a5/0x480 [ 12.834800] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.834821] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.834847] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.834870] ? __kthread_parkme+0x82/0x180 [ 12.834890] ? preempt_count_sub+0x50/0x80 [ 12.834913] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.834936] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.834980] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.835004] kthread+0x337/0x6f0 [ 12.835022] ? trace_preempt_on+0x20/0xc0 [ 12.835089] ? __pfx_kthread+0x10/0x10 [ 12.835109] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.835130] ? calculate_sigpending+0x7b/0xa0 [ 12.835154] ? __pfx_kthread+0x10/0x10 [ 12.835175] ret_from_fork+0x116/0x1d0 [ 12.835194] ? __pfx_kthread+0x10/0x10 [ 12.835213] ret_from_fork_asm+0x1a/0x30 [ 12.835245] </TASK> [ 12.835256] [ 12.846099] Allocated by task 231: [ 12.846811] kasan_save_stack+0x45/0x70 [ 12.847188] kasan_save_track+0x18/0x40 [ 12.847354] kasan_save_alloc_info+0x3b/0x50 [ 12.847588] __kasan_slab_alloc+0x91/0xa0 [ 12.847760] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.847981] kmem_cache_rcu_uaf+0x155/0x510 [ 12.848200] kunit_try_run_case+0x1a5/0x480 [ 12.848363] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.848974] kthread+0x337/0x6f0 [ 12.849406] ret_from_fork+0x116/0x1d0 [ 12.849609] ret_from_fork_asm+0x1a/0x30 [ 12.849792] [ 12.849866] Freed by task 0: [ 12.850020] kasan_save_stack+0x45/0x70 [ 12.850594] kasan_save_track+0x18/0x40 [ 12.850850] kasan_save_free_info+0x3f/0x60 [ 12.851217] __kasan_slab_free+0x56/0x70 [ 12.851383] slab_free_after_rcu_debug+0xe4/0x310 [ 12.851775] rcu_core+0x66f/0x1c40 [ 12.851927] rcu_core_si+0x12/0x20 [ 12.852262] handle_softirqs+0x209/0x730 [ 12.852590] __irq_exit_rcu+0xc9/0x110 [ 12.852772] irq_exit_rcu+0x12/0x20 [ 12.852936] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.853154] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.853396] [ 12.853486] Last potentially related work creation: [ 12.853721] kasan_save_stack+0x45/0x70 [ 12.853904] kasan_record_aux_stack+0xb2/0xc0 [ 12.854101] kmem_cache_free+0x131/0x420 [ 12.854557] kmem_cache_rcu_uaf+0x194/0x510 [ 12.854715] kunit_try_run_case+0x1a5/0x480 [ 12.854862] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.855058] kthread+0x337/0x6f0 [ 12.855360] ret_from_fork+0x116/0x1d0 [ 12.855693] ret_from_fork_asm+0x1a/0x30 [ 12.855953] [ 12.856026] The buggy address belongs to the object at ffff8881027f3000 [ 12.856026] which belongs to the cache test_cache of size 200 [ 12.856691] The buggy address is located 0 bytes inside of [ 12.856691] freed 200-byte region [ffff8881027f3000, ffff8881027f30c8) [ 12.857233] [ 12.857331] The buggy address belongs to the physical page: [ 12.857525] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027f3 [ 12.857883] flags: 0x200000000000000(node=0|zone=2) [ 12.858234] page_type: f5(slab) [ 12.858408] raw: 0200000000000000 ffff888101640500 dead000000000122 0000000000000000 [ 12.858659] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.858993] page dumped because: kasan: bad access detected [ 12.859248] [ 12.859408] Memory state around the buggy address: [ 12.859614] ffff8881027f2f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.859846] ffff8881027f2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.860341] >ffff8881027f3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.860643] ^ [ 12.860807] ffff8881027f3080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.861055] ffff8881027f3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.861443] ==================================================================