Date
July 3, 2025, 6:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.028440] ================================================================== [ 18.028565] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 18.028674] Read of size 1 at addr fff00000c78cb000 by task kunit_try_catch/213 [ 18.028866] [ 18.028973] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.029109] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.029137] Hardware name: linux,dummy-virt (DT) [ 18.029173] Call trace: [ 18.029196] show_stack+0x20/0x38 (C) [ 18.029251] dump_stack_lvl+0x8c/0xd0 [ 18.029301] print_report+0x118/0x608 [ 18.029437] kasan_report+0xdc/0x128 [ 18.029542] __asan_report_load1_noabort+0x20/0x30 [ 18.029593] kmem_cache_rcu_uaf+0x388/0x468 [ 18.029665] kunit_try_run_case+0x170/0x3f0 [ 18.029716] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.029771] kthread+0x328/0x630 [ 18.029842] ret_from_fork+0x10/0x20 [ 18.029892] [ 18.029910] Allocated by task 213: [ 18.029943] kasan_save_stack+0x3c/0x68 [ 18.030142] kasan_save_track+0x20/0x40 [ 18.030293] kasan_save_alloc_info+0x40/0x58 [ 18.030361] __kasan_slab_alloc+0xa8/0xb0 [ 18.030531] kmem_cache_alloc_noprof+0x10c/0x398 [ 18.030663] kmem_cache_rcu_uaf+0x12c/0x468 [ 18.030742] kunit_try_run_case+0x170/0x3f0 [ 18.030851] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.030950] kthread+0x328/0x630 [ 18.031053] ret_from_fork+0x10/0x20 [ 18.031094] [ 18.031146] Freed by task 0: [ 18.031174] kasan_save_stack+0x3c/0x68 [ 18.031259] kasan_save_track+0x20/0x40 [ 18.031295] kasan_save_free_info+0x4c/0x78 [ 18.031354] __kasan_slab_free+0x6c/0x98 [ 18.031491] slab_free_after_rcu_debug+0xd4/0x2f8 [ 18.031537] rcu_core+0x9f4/0x1e20 [ 18.031715] rcu_core_si+0x18/0x30 [ 18.031838] handle_softirqs+0x374/0xb28 [ 18.031893] __do_softirq+0x1c/0x28 [ 18.032299] [ 18.032399] Last potentially related work creation: [ 18.032642] kasan_save_stack+0x3c/0x68 [ 18.032721] kasan_record_aux_stack+0xb4/0xc8 [ 18.033153] kmem_cache_free+0x120/0x468 [ 18.033327] kmem_cache_rcu_uaf+0x16c/0x468 [ 18.033368] kunit_try_run_case+0x170/0x3f0 [ 18.033702] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.034080] kthread+0x328/0x630 [ 18.034157] ret_from_fork+0x10/0x20 [ 18.034194] [ 18.034729] The buggy address belongs to the object at fff00000c78cb000 [ 18.034729] which belongs to the cache test_cache of size 200 [ 18.035171] The buggy address is located 0 bytes inside of [ 18.035171] freed 200-byte region [fff00000c78cb000, fff00000c78cb0c8) [ 18.035239] [ 18.035261] The buggy address belongs to the physical page: [ 18.035553] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078cb [ 18.035971] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.036312] page_type: f5(slab) [ 18.036590] raw: 0bfffe0000000000 fff00000c3eaea00 dead000000000122 0000000000000000 [ 18.036737] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 18.037109] page dumped because: kasan: bad access detected [ 18.037145] [ 18.037162] Memory state around the buggy address: [ 18.037197] fff00000c78caf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.037574] fff00000c78caf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.037639] >fff00000c78cb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.037678] ^ [ 18.037715] fff00000c78cb080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 18.037976] fff00000c78cb100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.038333] ==================================================================
[ 12.206527] ================================================================== [ 12.206987] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.208040] Read of size 1 at addr ffff888103343000 by task kunit_try_catch/231 [ 12.209205] [ 12.209572] CPU: 1 UID: 0 PID: 231 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 12.209624] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.209636] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.209658] Call Trace: [ 12.209670] <TASK> [ 12.209689] dump_stack_lvl+0x73/0xb0 [ 12.209845] print_report+0xd1/0x650 [ 12.209877] ? __virt_addr_valid+0x1db/0x2d0 [ 12.209902] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.209924] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.209945] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.209967] kasan_report+0x141/0x180 [ 12.209987] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.210014] __asan_report_load1_noabort+0x18/0x20 [ 12.210036] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.210058] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.210079] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 12.210122] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.210149] kunit_try_run_case+0x1a5/0x480 [ 12.210173] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.210194] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.210217] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.210238] ? __kthread_parkme+0x82/0x180 [ 12.210259] ? preempt_count_sub+0x50/0x80 [ 12.210282] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.210304] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.210326] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.210347] kthread+0x337/0x6f0 [ 12.210365] ? trace_preempt_on+0x20/0xc0 [ 12.210389] ? __pfx_kthread+0x10/0x10 [ 12.210408] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.210428] ? calculate_sigpending+0x7b/0xa0 [ 12.210451] ? __pfx_kthread+0x10/0x10 [ 12.210471] ret_from_fork+0x116/0x1d0 [ 12.210490] ? __pfx_kthread+0x10/0x10 [ 12.210509] ret_from_fork_asm+0x1a/0x30 [ 12.210539] </TASK> [ 12.210552] [ 12.220208] Allocated by task 231: [ 12.220633] kasan_save_stack+0x45/0x70 [ 12.220804] kasan_save_track+0x18/0x40 [ 12.221007] kasan_save_alloc_info+0x3b/0x50 [ 12.221245] __kasan_slab_alloc+0x91/0xa0 [ 12.221563] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.221770] kmem_cache_rcu_uaf+0x155/0x510 [ 12.221980] kunit_try_run_case+0x1a5/0x480 [ 12.222330] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.222570] kthread+0x337/0x6f0 [ 12.222742] ret_from_fork+0x116/0x1d0 [ 12.222902] ret_from_fork_asm+0x1a/0x30 [ 12.223067] [ 12.223169] Freed by task 0: [ 12.223363] kasan_save_stack+0x45/0x70 [ 12.223502] kasan_save_track+0x18/0x40 [ 12.223772] kasan_save_free_info+0x3f/0x60 [ 12.224043] __kasan_slab_free+0x56/0x70 [ 12.224239] slab_free_after_rcu_debug+0xe4/0x310 [ 12.224537] rcu_core+0x66f/0x1c40 [ 12.224676] rcu_core_si+0x12/0x20 [ 12.224799] handle_softirqs+0x209/0x730 [ 12.225126] __irq_exit_rcu+0xc9/0x110 [ 12.225524] irq_exit_rcu+0x12/0x20 [ 12.225661] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.225873] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.226096] [ 12.226361] Last potentially related work creation: [ 12.226570] kasan_save_stack+0x45/0x70 [ 12.226852] kasan_record_aux_stack+0xb2/0xc0 [ 12.227089] kmem_cache_free+0x131/0x420 [ 12.227961] kmem_cache_rcu_uaf+0x194/0x510 [ 12.228322] kunit_try_run_case+0x1a5/0x480 [ 12.228702] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.228936] kthread+0x337/0x6f0 [ 12.229119] ret_from_fork+0x116/0x1d0 [ 12.229591] ret_from_fork_asm+0x1a/0x30 [ 12.229880] [ 12.229985] The buggy address belongs to the object at ffff888103343000 [ 12.229985] which belongs to the cache test_cache of size 200 [ 12.230785] The buggy address is located 0 bytes inside of [ 12.230785] freed 200-byte region [ffff888103343000, ffff8881033430c8) [ 12.231558] [ 12.231662] The buggy address belongs to the physical page: [ 12.231841] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103343 [ 12.232534] flags: 0x200000000000000(node=0|zone=2) [ 12.232890] page_type: f5(slab) [ 12.233239] raw: 0200000000000000 ffff888101849640 dead000000000122 0000000000000000 [ 12.233935] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.234543] page dumped because: kasan: bad access detected [ 12.234740] [ 12.234949] Memory state around the buggy address: [ 12.235134] ffff888103342f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.235875] ffff888103342f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.236418] >ffff888103343000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.236673] ^ [ 12.236978] ffff888103343080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.237495] ffff888103343100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.237880] ==================================================================