Date
July 1, 2025, 12:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.691511] ================================================================== [ 18.691623] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 18.691703] Read of size 1 at addr fff00000c7829000 by task kunit_try_catch/213 [ 18.691756] [ 18.691800] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.691887] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.691913] Hardware name: linux,dummy-virt (DT) [ 18.691949] Call trace: [ 18.691974] show_stack+0x20/0x38 (C) [ 18.692027] dump_stack_lvl+0x8c/0xd0 [ 18.692080] print_report+0x118/0x608 [ 18.692127] kasan_report+0xdc/0x128 [ 18.692172] __asan_report_load1_noabort+0x20/0x30 [ 18.692224] kmem_cache_rcu_uaf+0x388/0x468 [ 18.692271] kunit_try_run_case+0x170/0x3f0 [ 18.692321] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.692376] kthread+0x328/0x630 [ 18.692420] ret_from_fork+0x10/0x20 [ 18.692486] [ 18.692505] Allocated by task 213: [ 18.692535] kasan_save_stack+0x3c/0x68 [ 18.692577] kasan_save_track+0x20/0x40 [ 18.692615] kasan_save_alloc_info+0x40/0x58 [ 18.692656] __kasan_slab_alloc+0xa8/0xb0 [ 18.692695] kmem_cache_alloc_noprof+0x10c/0x398 [ 18.692737] kmem_cache_rcu_uaf+0x12c/0x468 [ 18.692776] kunit_try_run_case+0x170/0x3f0 [ 18.692814] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.692857] kthread+0x328/0x630 [ 18.692889] ret_from_fork+0x10/0x20 [ 18.692924] [ 18.692944] Freed by task 0: [ 18.692970] kasan_save_stack+0x3c/0x68 [ 18.693007] kasan_save_track+0x20/0x40 [ 18.693044] kasan_save_free_info+0x4c/0x78 [ 18.693085] __kasan_slab_free+0x6c/0x98 [ 18.693120] slab_free_after_rcu_debug+0xd4/0x2f8 [ 18.693160] rcu_core+0x9f4/0x1e20 [ 18.693196] rcu_core_si+0x18/0x30 [ 18.693231] handle_softirqs+0x374/0xb28 [ 18.693268] __do_softirq+0x1c/0x28 [ 18.693302] [ 18.693322] Last potentially related work creation: [ 18.693348] kasan_save_stack+0x3c/0x68 [ 18.693387] kasan_record_aux_stack+0xb4/0xc8 [ 18.693426] kmem_cache_free+0x120/0x468 [ 18.693472] kmem_cache_rcu_uaf+0x16c/0x468 [ 18.693510] kunit_try_run_case+0x170/0x3f0 [ 18.693548] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.693592] kthread+0x328/0x630 [ 18.693623] ret_from_fork+0x10/0x20 [ 18.693659] [ 18.693677] The buggy address belongs to the object at fff00000c7829000 [ 18.693677] which belongs to the cache test_cache of size 200 [ 18.693739] The buggy address is located 0 bytes inside of [ 18.693739] freed 200-byte region [fff00000c7829000, fff00000c78290c8) [ 18.693802] [ 18.693824] The buggy address belongs to the physical page: [ 18.693858] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107829 [ 18.693917] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.693971] page_type: f5(slab) [ 18.694015] raw: 0bfffe0000000000 fff00000c3e4f500 dead000000000122 0000000000000000 [ 18.694066] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 18.694110] page dumped because: kasan: bad access detected [ 18.694140] [ 18.694158] Memory state around the buggy address: [ 18.694194] fff00000c7828f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 18.694239] fff00000c7828f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 18.694285] >fff00000c7829000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.694326] ^ [ 18.694354] fff00000c7829080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 18.694397] fff00000c7829100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.694455] ==================================================================
[ 12.234257] ================================================================== [ 12.234980] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.235496] Read of size 1 at addr ffff888103118000 by task kunit_try_catch/230 [ 12.235971] [ 12.236185] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 12.236233] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.236245] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.236268] Call Trace: [ 12.236280] <TASK> [ 12.236319] dump_stack_lvl+0x73/0xb0 [ 12.236352] print_report+0xd1/0x650 [ 12.236375] ? __virt_addr_valid+0x1db/0x2d0 [ 12.236398] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.236419] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.236440] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.236461] kasan_report+0x141/0x180 [ 12.236482] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.236508] __asan_report_load1_noabort+0x18/0x20 [ 12.236531] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.236553] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.236575] ? finish_task_switch.isra.0+0x153/0x700 [ 12.236598] ? __switch_to+0x47/0xf50 [ 12.236626] ? __pfx_read_tsc+0x10/0x10 [ 12.236646] ? ktime_get_ts64+0x86/0x230 [ 12.236903] kunit_try_run_case+0x1a5/0x480 [ 12.236930] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.236952] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.236976] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.236998] ? __kthread_parkme+0x82/0x180 [ 12.237017] ? preempt_count_sub+0x50/0x80 [ 12.237070] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.237092] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.237124] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.237280] kthread+0x337/0x6f0 [ 12.237307] ? trace_preempt_on+0x20/0xc0 [ 12.237333] ? __pfx_kthread+0x10/0x10 [ 12.237352] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.237373] ? calculate_sigpending+0x7b/0xa0 [ 12.237396] ? __pfx_kthread+0x10/0x10 [ 12.237417] ret_from_fork+0x116/0x1d0 [ 12.237435] ? __pfx_kthread+0x10/0x10 [ 12.237455] ret_from_fork_asm+0x1a/0x30 [ 12.237484] </TASK> [ 12.237497] [ 12.248468] Allocated by task 230: [ 12.248817] kasan_save_stack+0x45/0x70 [ 12.249020] kasan_save_track+0x18/0x40 [ 12.249466] kasan_save_alloc_info+0x3b/0x50 [ 12.249761] __kasan_slab_alloc+0x91/0xa0 [ 12.249982] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.250534] kmem_cache_rcu_uaf+0x155/0x510 [ 12.250708] kunit_try_run_case+0x1a5/0x480 [ 12.250961] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.251558] kthread+0x337/0x6f0 [ 12.251830] ret_from_fork+0x116/0x1d0 [ 12.252052] ret_from_fork_asm+0x1a/0x30 [ 12.252369] [ 12.252473] Freed by task 0: [ 12.252700] kasan_save_stack+0x45/0x70 [ 12.253122] kasan_save_track+0x18/0x40 [ 12.253388] kasan_save_free_info+0x3f/0x60 [ 12.253867] __kasan_slab_free+0x56/0x70 [ 12.254044] slab_free_after_rcu_debug+0xe4/0x310 [ 12.254601] rcu_core+0x66f/0x1c40 [ 12.254803] rcu_core_si+0x12/0x20 [ 12.254976] handle_softirqs+0x209/0x730 [ 12.255507] __irq_exit_rcu+0xc9/0x110 [ 12.255687] irq_exit_rcu+0x12/0x20 [ 12.255838] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.256427] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.256792] [ 12.256901] Last potentially related work creation: [ 12.257323] kasan_save_stack+0x45/0x70 [ 12.257508] kasan_record_aux_stack+0xb2/0xc0 [ 12.257967] kmem_cache_free+0x131/0x420 [ 12.258306] kmem_cache_rcu_uaf+0x194/0x510 [ 12.258651] kunit_try_run_case+0x1a5/0x480 [ 12.258852] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.259288] kthread+0x337/0x6f0 [ 12.259497] ret_from_fork+0x116/0x1d0 [ 12.259634] ret_from_fork_asm+0x1a/0x30 [ 12.260011] [ 12.260154] The buggy address belongs to the object at ffff888103118000 [ 12.260154] which belongs to the cache test_cache of size 200 [ 12.260735] The buggy address is located 0 bytes inside of [ 12.260735] freed 200-byte region [ffff888103118000, ffff8881031180c8) [ 12.261652] [ 12.261767] The buggy address belongs to the physical page: [ 12.261981] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103118 [ 12.262720] flags: 0x200000000000000(node=0|zone=2) [ 12.263064] page_type: f5(slab) [ 12.263456] raw: 0200000000000000 ffff888101ae4c80 dead000000000122 0000000000000000 [ 12.263926] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.264502] page dumped because: kasan: bad access detected [ 12.264720] [ 12.264806] Memory state around the buggy address: [ 12.265224] ffff888103117f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.265935] ffff888103117f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.266368] >ffff888103118000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.266954] ^ [ 12.267303] ffff888103118080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.267619] ffff888103118100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.268070] ==================================================================