Date
June 26, 2025, 11:12 a.m.
| Environment | |
|---|---|
| e850-96 | |
| qemu-arm64 | |
| qemu-x86_64 |
[ 34.385122] ================================================================== [ 34.385308] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 34.385443] Read of size 1 at addr ffff000802d0c000 by task kunit_try_catch/262 [ 34.388824] [ 34.390313] CPU: 0 UID: 0 PID: 262 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc3 #1 PREEMPT [ 34.390370] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.390386] Hardware name: WinLink E850-96 board (DT) [ 34.390410] Call trace: [ 34.390428] show_stack+0x20/0x38 (C) [ 34.390464] dump_stack_lvl+0x8c/0xd0 [ 34.390504] print_report+0x118/0x608 [ 34.390538] kasan_report+0xdc/0x128 [ 34.390570] __asan_report_load1_noabort+0x20/0x30 [ 34.390608] kmem_cache_rcu_uaf+0x388/0x468 [ 34.390644] kunit_try_run_case+0x170/0x3f0 [ 34.390682] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.390723] kthread+0x328/0x630 [ 34.390757] ret_from_fork+0x10/0x20 [ 34.390794] [ 34.453148] Allocated by task 262: [ 34.456535] kasan_save_stack+0x3c/0x68 [ 34.460351] kasan_save_track+0x20/0x40 [ 34.464171] kasan_save_alloc_info+0x40/0x58 [ 34.468424] __kasan_slab_alloc+0xa8/0xb0 [ 34.472417] kmem_cache_alloc_noprof+0x10c/0x398 [ 34.477018] kmem_cache_rcu_uaf+0x12c/0x468 [ 34.481184] kunit_try_run_case+0x170/0x3f0 [ 34.485351] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.490821] kthread+0x328/0x630 [ 34.494031] ret_from_fork+0x10/0x20 [ 34.497590] [ 34.499067] Freed by task 0: [ 34.501933] kasan_save_stack+0x3c/0x68 [ 34.505750] kasan_save_track+0x20/0x40 [ 34.509569] kasan_save_free_info+0x4c/0x78 [ 34.513736] __kasan_slab_free+0x6c/0x98 [ 34.517642] slab_free_after_rcu_debug+0xd4/0x2f8 [ 34.522329] rcu_core+0x9f4/0x1e20 [ 34.525715] rcu_core_si+0x18/0x30 [ 34.529100] handle_softirqs+0x374/0xb28 [ 34.533006] __do_softirq+0x1c/0x28 [ 34.536479] [ 34.537954] Last potentially related work creation: [ 34.542817] kasan_save_stack+0x3c/0x68 [ 34.546634] kasan_record_aux_stack+0xb4/0xc8 [ 34.550976] kmem_cache_free+0x120/0x468 [ 34.554881] kmem_cache_rcu_uaf+0x16c/0x468 [ 34.559048] kunit_try_run_case+0x170/0x3f0 [ 34.563214] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.568683] kthread+0x328/0x630 [ 34.571894] ret_from_fork+0x10/0x20 [ 34.575454] [ 34.576928] The buggy address belongs to the object at ffff000802d0c000 [ 34.576928] which belongs to the cache test_cache of size 200 [ 34.589345] The buggy address is located 0 bytes inside of [ 34.589345] freed 200-byte region [ffff000802d0c000, ffff000802d0c0c8) [ 34.601408] [ 34.602887] The buggy address belongs to the physical page: [ 34.608444] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x882d0c [ 34.616428] head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 34.624066] flags: 0xbfffe0000000040(head|node=0|zone=2|lastcpupid=0x1ffff) [ 34.631010] page_type: f5(slab) [ 34.634148] raw: 0bfffe0000000040 ffff00080177ba40 dead000000000122 0000000000000000 [ 34.641866] raw: 0000000000000000 00000000801f001f 00000000f5000000 0000000000000000 [ 34.649592] head: 0bfffe0000000040 ffff00080177ba40 dead000000000122 0000000000000000 [ 34.657404] head: 0000000000000000 00000000801f001f 00000000f5000000 0000000000000000 [ 34.665217] head: 0bfffe0000000001 fffffdffe00b4301 00000000ffffffff 00000000ffffffff [ 34.673028] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 [ 34.680834] page dumped because: kasan: bad access detected [ 34.686391] [ 34.687865] Memory state around the buggy address: [ 34.692647] ffff000802d0bf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 34.699848] ffff000802d0bf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 34.707053] >ffff000802d0c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.714254] ^ [ 34.717469] ffff000802d0c080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.724674] ffff000802d0c100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.731876] ==================================================================
[ 19.268438] ================================================================== [ 19.268550] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 19.268627] Read of size 1 at addr fff00000c7a50000 by task kunit_try_catch/215 [ 19.268680] [ 19.268720] CPU: 0 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc3 #1 PREEMPT [ 19.268811] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.268839] Hardware name: linux,dummy-virt (DT) [ 19.268908] Call trace: [ 19.268935] show_stack+0x20/0x38 (C) [ 19.268985] dump_stack_lvl+0x8c/0xd0 [ 19.269037] print_report+0x118/0x608 [ 19.269081] kasan_report+0xdc/0x128 [ 19.269126] __asan_report_load1_noabort+0x20/0x30 [ 19.269176] kmem_cache_rcu_uaf+0x388/0x468 [ 19.269224] kunit_try_run_case+0x170/0x3f0 [ 19.269275] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.269330] kthread+0x328/0x630 [ 19.269380] ret_from_fork+0x10/0x20 [ 19.269432] [ 19.269450] Allocated by task 215: [ 19.269478] kasan_save_stack+0x3c/0x68 [ 19.269520] kasan_save_track+0x20/0x40 [ 19.269557] kasan_save_alloc_info+0x40/0x58 [ 19.269596] __kasan_slab_alloc+0xa8/0xb0 [ 19.269633] kmem_cache_alloc_noprof+0x10c/0x398 [ 19.269674] kmem_cache_rcu_uaf+0x12c/0x468 [ 19.269715] kunit_try_run_case+0x170/0x3f0 [ 19.269755] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.269801] kthread+0x328/0x630 [ 19.269836] ret_from_fork+0x10/0x20 [ 19.269883] [ 19.269903] Freed by task 0: [ 19.269930] kasan_save_stack+0x3c/0x68 [ 19.269967] kasan_save_track+0x20/0x40 [ 19.270003] kasan_save_free_info+0x4c/0x78 [ 19.270041] __kasan_slab_free+0x6c/0x98 [ 19.270077] slab_free_after_rcu_debug+0xd4/0x2f8 [ 19.270116] rcu_core+0x9f4/0x1e20 [ 19.270151] rcu_core_si+0x18/0x30 [ 19.270185] handle_softirqs+0x374/0xb28 [ 19.270222] __do_softirq+0x1c/0x28 [ 19.270255] [ 19.270275] Last potentially related work creation: [ 19.270300] kasan_save_stack+0x3c/0x68 [ 19.270336] kasan_record_aux_stack+0xb4/0xc8 [ 19.270374] kmem_cache_free+0x120/0x468 [ 19.270410] kmem_cache_rcu_uaf+0x16c/0x468 [ 19.270451] kunit_try_run_case+0x170/0x3f0 [ 19.270488] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.270533] kthread+0x328/0x630 [ 19.270567] ret_from_fork+0x10/0x20 [ 19.270603] [ 19.270621] The buggy address belongs to the object at fff00000c7a50000 [ 19.270621] which belongs to the cache test_cache of size 200 [ 19.270681] The buggy address is located 0 bytes inside of [ 19.270681] freed 200-byte region [fff00000c7a50000, fff00000c7a500c8) [ 19.270743] [ 19.270763] The buggy address belongs to the physical page: [ 19.270797] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107a50 [ 19.270864] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.270918] page_type: f5(slab) [ 19.270964] raw: 0bfffe0000000000 fff00000c59d6780 dead000000000122 0000000000000000 [ 19.271020] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.271065] page dumped because: kasan: bad access detected [ 19.271101] [ 19.271118] Memory state around the buggy address: [ 19.271158] fff00000c7a4ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.271204] fff00000c7a4ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.271251] >fff00000c7a50000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.271294] ^ [ 19.271322] fff00000c7a50080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.271367] fff00000c7a50100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.271409] ==================================================================
[ 11.729092] ================================================================== [ 11.729612] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.730376] Read of size 1 at addr ffff888102f74000 by task kunit_try_catch/232 [ 11.731155] [ 11.731436] CPU: 1 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc3 #1 PREEMPT(voluntary) [ 11.731498] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.731512] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.731536] Call Trace: [ 11.731551] <TASK> [ 11.731587] dump_stack_lvl+0x73/0xb0 [ 11.731621] print_report+0xd1/0x650 [ 11.731647] ? __virt_addr_valid+0x1db/0x2d0 [ 11.731671] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.731691] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.731904] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.731952] kasan_report+0x141/0x180 [ 11.731978] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.732003] __asan_report_load1_noabort+0x18/0x20 [ 11.732025] kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.732045] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 11.732064] ? finish_task_switch.isra.0+0x153/0x700 [ 11.732089] ? __switch_to+0x5d9/0xf60 [ 11.732110] ? dequeue_task_fair+0x166/0x4e0 [ 11.732137] ? __pfx_read_tsc+0x10/0x10 [ 11.732157] ? ktime_get_ts64+0x86/0x230 [ 11.732184] kunit_try_run_case+0x1a5/0x480 [ 11.732210] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.732232] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.732263] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.732286] ? __kthread_parkme+0x82/0x180 [ 11.732309] ? preempt_count_sub+0x50/0x80 [ 11.732333] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.732356] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.732379] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.732401] kthread+0x337/0x6f0 [ 11.732418] ? trace_preempt_on+0x20/0xc0 [ 11.732442] ? __pfx_kthread+0x10/0x10 [ 11.732460] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.732482] ? calculate_sigpending+0x7b/0xa0 [ 11.732503] ? __pfx_kthread+0x10/0x10 [ 11.732521] ret_from_fork+0x41/0x80 [ 11.732542] ? __pfx_kthread+0x10/0x10 [ 11.732569] ret_from_fork_asm+0x1a/0x30 [ 11.732602] </TASK> [ 11.732613] [ 11.743278] Allocated by task 232: [ 11.743995] kasan_save_stack+0x45/0x70 [ 11.744206] kasan_save_track+0x18/0x40 [ 11.744521] kasan_save_alloc_info+0x3b/0x50 [ 11.744914] __kasan_slab_alloc+0x91/0xa0 [ 11.745218] kmem_cache_alloc_noprof+0x123/0x3f0 [ 11.745509] kmem_cache_rcu_uaf+0x155/0x510 [ 11.745688] kunit_try_run_case+0x1a5/0x480 [ 11.745964] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.746208] kthread+0x337/0x6f0 [ 11.746364] ret_from_fork+0x41/0x80 [ 11.746522] ret_from_fork_asm+0x1a/0x30 [ 11.747119] [ 11.747201] Freed by task 0: [ 11.747498] kasan_save_stack+0x45/0x70 [ 11.748055] kasan_save_track+0x18/0x40 [ 11.748245] kasan_save_free_info+0x3f/0x60 [ 11.748544] __kasan_slab_free+0x56/0x70 [ 11.748722] slab_free_after_rcu_debug+0xe4/0x310 [ 11.749116] rcu_core+0x66c/0x1c30 [ 11.749302] rcu_core_si+0x12/0x20 [ 11.749426] handle_softirqs+0x209/0x730 [ 11.749959] __irq_exit_rcu+0xc9/0x110 [ 11.750150] irq_exit_rcu+0x12/0x20 [ 11.750282] sysvec_apic_timer_interrupt+0x81/0x90 [ 11.750654] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 11.751092] [ 11.751364] Last potentially related work creation: [ 11.751585] kasan_save_stack+0x45/0x70 [ 11.752116] kasan_record_aux_stack+0xb2/0xc0 [ 11.752324] kmem_cache_free+0x131/0x420 [ 11.752511] kmem_cache_rcu_uaf+0x194/0x510 [ 11.752909] kunit_try_run_case+0x1a5/0x480 [ 11.753280] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.753694] kthread+0x337/0x6f0 [ 11.754049] ret_from_fork+0x41/0x80 [ 11.754205] ret_from_fork_asm+0x1a/0x30 [ 11.754534] [ 11.754661] The buggy address belongs to the object at ffff888102f74000 [ 11.754661] which belongs to the cache test_cache of size 200 [ 11.755359] The buggy address is located 0 bytes inside of [ 11.755359] freed 200-byte region [ffff888102f74000, ffff888102f740c8) [ 11.756413] [ 11.756518] The buggy address belongs to the physical page: [ 11.756700] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102f74 [ 11.757131] flags: 0x200000000000000(node=0|zone=2) [ 11.757355] page_type: f5(slab) [ 11.757527] raw: 0200000000000000 ffff88810128f3c0 dead000000000122 0000000000000000 [ 11.758319] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 11.758896] page dumped because: kasan: bad access detected [ 11.759251] [ 11.759359] Memory state around the buggy address: [ 11.759830] ffff888102f73f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.760458] ffff888102f73f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.761029] >ffff888102f74000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.761353] ^ [ 11.761511] ffff888102f74080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 11.762099] ffff888102f74100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.762513] ==================================================================