Date
July 19, 2025, 11:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.573032] ================================================================== [ 16.573134] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 16.573216] Read of size 1 at addr fff00000c77b1000 by task kunit_try_catch/213 [ 16.574016] [ 16.574187] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.574783] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.574813] Hardware name: linux,dummy-virt (DT) [ 16.575201] Call trace: [ 16.575230] show_stack+0x20/0x38 (C) [ 16.575597] dump_stack_lvl+0x8c/0xd0 [ 16.575660] print_report+0x118/0x5d0 [ 16.575937] kasan_report+0xdc/0x128 [ 16.576059] __asan_report_load1_noabort+0x20/0x30 [ 16.576299] kmem_cache_rcu_uaf+0x388/0x468 [ 16.576348] kunit_try_run_case+0x170/0x3f0 [ 16.576742] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.577224] kthread+0x328/0x630 [ 16.577326] ret_from_fork+0x10/0x20 [ 16.577530] [ 16.577550] Allocated by task 213: [ 16.577581] kasan_save_stack+0x3c/0x68 [ 16.578021] kasan_save_track+0x20/0x40 [ 16.578135] kasan_save_alloc_info+0x40/0x58 [ 16.578176] __kasan_slab_alloc+0xa8/0xb0 [ 16.578526] kmem_cache_alloc_noprof+0x10c/0x398 [ 16.578578] kmem_cache_rcu_uaf+0x12c/0x468 [ 16.578901] kunit_try_run_case+0x170/0x3f0 [ 16.579061] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.579107] kthread+0x328/0x630 [ 16.579703] ret_from_fork+0x10/0x20 [ 16.579917] [ 16.579939] Freed by task 0: [ 16.579969] kasan_save_stack+0x3c/0x68 [ 16.580140] kasan_save_track+0x20/0x40 [ 16.580201] kasan_save_free_info+0x4c/0x78 [ 16.580243] __kasan_slab_free+0x6c/0x98 [ 16.580359] slab_free_after_rcu_debug+0xd4/0x2f8 [ 16.580444] rcu_core+0x9f4/0x1e20 [ 16.580602] rcu_core_si+0x18/0x30 [ 16.580725] handle_softirqs+0x374/0xb28 [ 16.580854] __do_softirq+0x1c/0x28 [ 16.581009] [ 16.581032] Last potentially related work creation: [ 16.581061] kasan_save_stack+0x3c/0x68 [ 16.581568] kasan_record_aux_stack+0xb4/0xc8 [ 16.581850] kmem_cache_free+0x120/0x468 [ 16.581948] kmem_cache_rcu_uaf+0x16c/0x468 [ 16.581984] kunit_try_run_case+0x170/0x3f0 [ 16.582080] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.582128] kthread+0x328/0x630 [ 16.582765] ret_from_fork+0x10/0x20 [ 16.583195] [ 16.583381] The buggy address belongs to the object at fff00000c77b1000 [ 16.583381] which belongs to the cache test_cache of size 200 [ 16.583722] The buggy address is located 0 bytes inside of [ 16.583722] freed 200-byte region [fff00000c77b1000, fff00000c77b10c8) [ 16.583793] [ 16.584151] The buggy address belongs to the physical page: [ 16.584258] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1077b1 [ 16.584516] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.584579] page_type: f5(slab) [ 16.584624] raw: 0bfffe0000000000 fff00000c5b338c0 dead000000000122 0000000000000000 [ 16.585053] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 16.585354] page dumped because: kasan: bad access detected [ 16.585392] [ 16.585525] Memory state around the buggy address: [ 16.585731] fff00000c77b0f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.585789] fff00000c77b0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.586354] >fff00000c77b1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.586449] ^ [ 16.586481] fff00000c77b1080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 16.587017] fff00000c77b1100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.587281] ==================================================================
[ 12.796668] ================================================================== [ 12.797181] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.797487] Read of size 1 at addr ffff888102fdc000 by task kunit_try_catch/230 [ 12.797897] [ 12.798041] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.798186] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.798199] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.798222] Call Trace: [ 12.798234] <TASK> [ 12.798251] dump_stack_lvl+0x73/0xb0 [ 12.798283] print_report+0xd1/0x610 [ 12.798304] ? __virt_addr_valid+0x1db/0x2d0 [ 12.798327] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.798350] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.798425] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.798450] kasan_report+0x141/0x180 [ 12.798471] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.798498] __asan_report_load1_noabort+0x18/0x20 [ 12.798521] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.798543] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.798565] ? finish_task_switch.isra.0+0x153/0x700 [ 12.798611] ? __switch_to+0x47/0xf50 [ 12.798640] ? __pfx_read_tsc+0x10/0x10 [ 12.798660] ? ktime_get_ts64+0x86/0x230 [ 12.798684] kunit_try_run_case+0x1a5/0x480 [ 12.798709] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.798730] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.798772] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.798795] ? __kthread_parkme+0x82/0x180 [ 12.798816] ? preempt_count_sub+0x50/0x80 [ 12.798838] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.798861] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.798882] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.798905] kthread+0x337/0x6f0 [ 12.798924] ? trace_preempt_on+0x20/0xc0 [ 12.798946] ? __pfx_kthread+0x10/0x10 [ 12.798965] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.798986] ? calculate_sigpending+0x7b/0xa0 [ 12.799021] ? __pfx_kthread+0x10/0x10 [ 12.799041] ret_from_fork+0x116/0x1d0 [ 12.799059] ? __pfx_kthread+0x10/0x10 [ 12.799078] ret_from_fork_asm+0x1a/0x30 [ 12.799109] </TASK> [ 12.799119] [ 12.809771] Allocated by task 230: [ 12.809958] kasan_save_stack+0x45/0x70 [ 12.810187] kasan_save_track+0x18/0x40 [ 12.810556] kasan_save_alloc_info+0x3b/0x50 [ 12.810904] __kasan_slab_alloc+0x91/0xa0 [ 12.811142] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.811464] kmem_cache_rcu_uaf+0x155/0x510 [ 12.811771] kunit_try_run_case+0x1a5/0x480 [ 12.811979] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.812215] kthread+0x337/0x6f0 [ 12.812367] ret_from_fork+0x116/0x1d0 [ 12.812554] ret_from_fork_asm+0x1a/0x30 [ 12.812836] [ 12.812907] Freed by task 0: [ 12.813054] kasan_save_stack+0x45/0x70 [ 12.813583] kasan_save_track+0x18/0x40 [ 12.813720] kasan_save_free_info+0x3f/0x60 [ 12.814315] __kasan_slab_free+0x56/0x70 [ 12.814934] slab_free_after_rcu_debug+0xe4/0x310 [ 12.815188] rcu_core+0x66f/0x1c40 [ 12.815357] rcu_core_si+0x12/0x20 [ 12.815764] handle_softirqs+0x209/0x730 [ 12.816139] __irq_exit_rcu+0xc9/0x110 [ 12.816334] irq_exit_rcu+0x12/0x20 [ 12.816704] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.816926] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.817159] [ 12.817248] Last potentially related work creation: [ 12.817818] kasan_save_stack+0x45/0x70 [ 12.818351] kasan_record_aux_stack+0xb2/0xc0 [ 12.818671] kmem_cache_free+0x131/0x420 [ 12.818849] kmem_cache_rcu_uaf+0x194/0x510 [ 12.819049] kunit_try_run_case+0x1a5/0x480 [ 12.819243] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.819968] kthread+0x337/0x6f0 [ 12.820295] ret_from_fork+0x116/0x1d0 [ 12.820856] ret_from_fork_asm+0x1a/0x30 [ 12.821062] [ 12.821155] The buggy address belongs to the object at ffff888102fdc000 [ 12.821155] which belongs to the cache test_cache of size 200 [ 12.822350] The buggy address is located 0 bytes inside of [ 12.822350] freed 200-byte region [ffff888102fdc000, ffff888102fdc0c8) [ 12.823562] [ 12.823806] The buggy address belongs to the physical page: [ 12.824064] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102fdc [ 12.824619] flags: 0x200000000000000(node=0|zone=2) [ 12.824899] page_type: f5(slab) [ 12.825222] raw: 0200000000000000 ffff888102fd9000 dead000000000122 0000000000000000 [ 12.825733] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.826046] page dumped because: kasan: bad access detected [ 12.826279] [ 12.826364] Memory state around the buggy address: [ 12.826988] ffff888102fdbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.827479] ffff888102fdbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.828056] >ffff888102fdc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.828719] ^ [ 12.829048] ffff888102fdc080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.829352] ffff888102fdc100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.829914] ==================================================================