Date
July 9, 2025, 2:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.446020] ================================================================== [ 18.446158] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 18.446244] Read of size 1 at addr fff00000c779e000 by task kunit_try_catch/213 [ 18.446301] [ 18.446347] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc5 #1 PREEMPT [ 18.446442] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 18.446472] Hardware name: linux,dummy-virt (DT) [ 18.446508] Call trace: [ 18.446532] show_stack+0x20/0x38 (C) [ 18.446589] dump_stack_lvl+0x8c/0xd0 [ 18.446642] print_report+0x118/0x608 [ 18.446693] kasan_report+0xdc/0x128 [ 18.446739] __asan_report_load1_noabort+0x20/0x30 [ 18.446792] kmem_cache_rcu_uaf+0x388/0x468 [ 18.446841] kunit_try_run_case+0x170/0x3f0 [ 18.446892] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.446947] kthread+0x328/0x630 [ 18.446993] ret_from_fork+0x10/0x20 [ 18.447045] [ 18.447063] Allocated by task 213: [ 18.447104] kasan_save_stack+0x3c/0x68 [ 18.447147] kasan_save_track+0x20/0x40 [ 18.447186] kasan_save_alloc_info+0x40/0x58 [ 18.447227] __kasan_slab_alloc+0xa8/0xb0 [ 18.447264] kmem_cache_alloc_noprof+0x10c/0x398 [ 18.447307] kmem_cache_rcu_uaf+0x12c/0x468 [ 18.447346] kunit_try_run_case+0x170/0x3f0 [ 18.447384] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.447429] kthread+0x328/0x630 [ 18.447462] ret_from_fork+0x10/0x20 [ 18.447500] [ 18.447521] Freed by task 0: [ 18.447550] kasan_save_stack+0x3c/0x68 [ 18.447586] kasan_save_track+0x20/0x40 [ 18.447624] kasan_save_free_info+0x4c/0x78 [ 18.447664] __kasan_slab_free+0x6c/0x98 [ 18.447702] slab_free_after_rcu_debug+0xd4/0x2f8 [ 18.447743] rcu_core+0x9f4/0x1e20 [ 18.447780] rcu_core_si+0x18/0x30 [ 18.447816] handle_softirqs+0x374/0xb28 [ 18.447855] __do_softirq+0x1c/0x28 [ 18.447890] [ 18.447909] Last potentially related work creation: [ 18.447937] kasan_save_stack+0x3c/0x68 [ 18.447976] kasan_record_aux_stack+0xb4/0xc8 [ 18.448018] kmem_cache_free+0x120/0x468 [ 18.448061] kmem_cache_rcu_uaf+0x16c/0x468 [ 18.448111] kunit_try_run_case+0x170/0x3f0 [ 18.448150] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.448195] kthread+0x328/0x630 [ 18.448229] ret_from_fork+0x10/0x20 [ 18.448265] [ 18.448284] The buggy address belongs to the object at fff00000c779e000 [ 18.448284] which belongs to the cache test_cache of size 200 [ 18.448345] The buggy address is located 0 bytes inside of [ 18.448345] freed 200-byte region [fff00000c779e000, fff00000c779e0c8) [ 18.448409] [ 18.448431] The buggy address belongs to the physical page: [ 18.448464] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10779e [ 18.448525] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.448579] page_type: f5(slab) [ 18.448629] raw: 0bfffe0000000000 fff00000c582b780 dead000000000122 0000000000000000 [ 18.448685] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 18.448730] page dumped because: kasan: bad access detected [ 18.448760] [ 18.448777] Memory state around the buggy address: [ 18.448813] fff00000c779df00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 18.448860] fff00000c779df80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 18.448907] >fff00000c779e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.448947] ^ [ 18.448976] fff00000c779e080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 18.449021] fff00000c779e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.449062] ==================================================================
[ 13.569172] ================================================================== [ 13.569765] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.570294] Read of size 1 at addr ffff888103961000 by task kunit_try_catch/230 [ 13.570589] [ 13.570700] CPU: 1 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.570751] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.570763] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.570814] Call Trace: [ 13.570832] <TASK> [ 13.570852] dump_stack_lvl+0x73/0xb0 [ 13.570902] print_report+0xd1/0x650 [ 13.570926] ? __virt_addr_valid+0x1db/0x2d0 [ 13.570951] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.571033] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.571057] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.571080] kasan_report+0x141/0x180 [ 13.571144] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.571175] __asan_report_load1_noabort+0x18/0x20 [ 13.571200] kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.571226] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 13.571250] ? finish_task_switch.isra.0+0x153/0x700 [ 13.571275] ? __switch_to+0x47/0xf50 [ 13.571305] ? __pfx_read_tsc+0x10/0x10 [ 13.571327] ? ktime_get_ts64+0x86/0x230 [ 13.571353] kunit_try_run_case+0x1a5/0x480 [ 13.571379] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.571428] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.571454] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.571478] ? __kthread_parkme+0x82/0x180 [ 13.571510] ? preempt_count_sub+0x50/0x80 [ 13.571533] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.571585] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.571625] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.571650] kthread+0x337/0x6f0 [ 13.571668] ? trace_preempt_on+0x20/0xc0 [ 13.571693] ? __pfx_kthread+0x10/0x10 [ 13.571713] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.571734] ? calculate_sigpending+0x7b/0xa0 [ 13.571758] ? __pfx_kthread+0x10/0x10 [ 13.572224] ret_from_fork+0x116/0x1d0 [ 13.572248] ? __pfx_kthread+0x10/0x10 [ 13.572268] ret_from_fork_asm+0x1a/0x30 [ 13.572301] </TASK> [ 13.572312] [ 13.580864] Allocated by task 230: [ 13.581060] kasan_save_stack+0x45/0x70 [ 13.581581] kasan_save_track+0x18/0x40 [ 13.581758] kasan_save_alloc_info+0x3b/0x50 [ 13.582113] __kasan_slab_alloc+0x91/0xa0 [ 13.582269] kmem_cache_alloc_noprof+0x123/0x3f0 [ 13.582476] kmem_cache_rcu_uaf+0x155/0x510 [ 13.582696] kunit_try_run_case+0x1a5/0x480 [ 13.582962] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.583189] kthread+0x337/0x6f0 [ 13.583457] ret_from_fork+0x116/0x1d0 [ 13.583617] ret_from_fork_asm+0x1a/0x30 [ 13.583902] [ 13.584060] Freed by task 0: [ 13.584190] kasan_save_stack+0x45/0x70 [ 13.584330] kasan_save_track+0x18/0x40 [ 13.584528] kasan_save_free_info+0x3f/0x60 [ 13.584756] __kasan_slab_free+0x56/0x70 [ 13.585039] slab_free_after_rcu_debug+0xe4/0x310 [ 13.585515] rcu_core+0x66f/0x1c40 [ 13.585710] rcu_core_si+0x12/0x20 [ 13.586107] handle_softirqs+0x209/0x730 [ 13.586255] __irq_exit_rcu+0xc9/0x110 [ 13.586452] irq_exit_rcu+0x12/0x20 [ 13.586661] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.586908] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.587283] [ 13.587399] Last potentially related work creation: [ 13.587561] kasan_save_stack+0x45/0x70 [ 13.587731] kasan_record_aux_stack+0xb2/0xc0 [ 13.588178] kmem_cache_free+0x131/0x420 [ 13.589041] kmem_cache_rcu_uaf+0x194/0x510 [ 13.589378] kunit_try_run_case+0x1a5/0x480 [ 13.589824] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.590132] kthread+0x337/0x6f0 [ 13.590268] ret_from_fork+0x116/0x1d0 [ 13.590460] ret_from_fork_asm+0x1a/0x30 [ 13.590660] [ 13.590746] The buggy address belongs to the object at ffff888103961000 [ 13.590746] which belongs to the cache test_cache of size 200 [ 13.591921] The buggy address is located 0 bytes inside of [ 13.591921] freed 200-byte region [ffff888103961000, ffff8881039610c8) [ 13.592605] [ 13.592718] The buggy address belongs to the physical page: [ 13.593007] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103961 [ 13.593584] flags: 0x200000000000000(node=0|zone=2) [ 13.594024] page_type: f5(slab) [ 13.594201] raw: 0200000000000000 ffff88810395f000 dead000000000122 0000000000000000 [ 13.594532] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 13.594953] page dumped because: kasan: bad access detected [ 13.595425] [ 13.595507] Memory state around the buggy address: [ 13.596046] ffff888103960f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.596554] ffff888103960f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.597232] >ffff888103961000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.597737] ^ [ 13.597956] ffff888103961080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 13.598277] ffff888103961100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.598585] ==================================================================