Date
July 1, 2025, 11:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.553771] ================================================================== [ 19.553888] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 19.553982] Read of size 1 at addr fff00000c7713000 by task kunit_try_catch/214 [ 19.554040] [ 19.554089] CPU: 1 UID: 0 PID: 214 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.554203] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.554231] Hardware name: linux,dummy-virt (DT) [ 19.554271] Call trace: [ 19.554295] show_stack+0x20/0x38 (C) [ 19.554351] dump_stack_lvl+0x8c/0xd0 [ 19.554407] print_report+0x118/0x608 [ 19.554455] kasan_report+0xdc/0x128 [ 19.554504] __asan_report_load1_noabort+0x20/0x30 [ 19.554558] kmem_cache_rcu_uaf+0x388/0x468 [ 19.554608] kunit_try_run_case+0x170/0x3f0 [ 19.554660] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.554717] kthread+0x328/0x630 [ 19.554764] ret_from_fork+0x10/0x20 [ 19.554817] [ 19.554838] Allocated by task 214: [ 19.554871] kasan_save_stack+0x3c/0x68 [ 19.554914] kasan_save_track+0x20/0x40 [ 19.554951] kasan_save_alloc_info+0x40/0x58 [ 19.554994] __kasan_slab_alloc+0xa8/0xb0 [ 19.555034] kmem_cache_alloc_noprof+0x10c/0x398 [ 19.555080] kmem_cache_rcu_uaf+0x12c/0x468 [ 19.556199] kunit_try_run_case+0x170/0x3f0 [ 19.556245] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.556293] kthread+0x328/0x630 [ 19.556329] ret_from_fork+0x10/0x20 [ 19.556369] [ 19.556389] Freed by task 0: [ 19.556421] kasan_save_stack+0x3c/0x68 [ 19.556464] kasan_save_track+0x20/0x40 [ 19.556504] kasan_save_free_info+0x4c/0x78 [ 19.556547] __kasan_slab_free+0x6c/0x98 [ 19.556585] slab_free_after_rcu_debug+0xd4/0x2f8 [ 19.556630] rcu_core+0x9f4/0x1e20 [ 19.556670] rcu_core_si+0x18/0x30 [ 19.556708] handle_softirqs+0x374/0xb28 [ 19.556748] __do_softirq+0x1c/0x28 [ 19.556785] [ 19.556807] Last potentially related work creation: [ 19.556837] kasan_save_stack+0x3c/0x68 [ 19.556876] kasan_record_aux_stack+0xb4/0xc8 [ 19.556920] kmem_cache_free+0x120/0x468 [ 19.556958] kmem_cache_rcu_uaf+0x16c/0x468 [ 19.556998] kunit_try_run_case+0x170/0x3f0 [ 19.557039] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.557085] kthread+0x328/0x630 [ 19.557120] ret_from_fork+0x10/0x20 [ 19.557169] [ 19.557241] The buggy address belongs to the object at fff00000c7713000 [ 19.557241] which belongs to the cache test_cache of size 200 [ 19.557338] The buggy address is located 0 bytes inside of [ 19.557338] freed 200-byte region [fff00000c7713000, fff00000c77130c8) [ 19.557406] [ 19.557442] The buggy address belongs to the physical page: [ 19.557479] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107713 [ 19.557540] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.557602] page_type: f5(slab) [ 19.557652] raw: 0bfffe0000000000 fff00000c0cacdc0 dead000000000122 0000000000000000 [ 19.557721] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.557767] page dumped because: kasan: bad access detected [ 19.557830] [ 19.557851] Memory state around the buggy address: [ 19.557888] fff00000c7712f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 19.557938] fff00000c7712f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 19.558003] >fff00000c7713000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.558067] ^ [ 19.558098] fff00000c7713080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.558170] fff00000c7713100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.558230] ==================================================================
[ 12.297239] ================================================================== [ 12.297852] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.298371] Read of size 1 at addr ffff88810259d000 by task kunit_try_catch/230 [ 12.299298] [ 12.299427] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 12.299477] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.299490] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.299512] Call Trace: [ 12.299526] <TASK> [ 12.299547] dump_stack_lvl+0x73/0xb0 [ 12.299580] print_report+0xd1/0x650 [ 12.299604] ? __virt_addr_valid+0x1db/0x2d0 [ 12.299628] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.299649] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.299670] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.299691] kasan_report+0x141/0x180 [ 12.299712] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.299738] __asan_report_load1_noabort+0x18/0x20 [ 12.299761] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.299783] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.299803] ? finish_task_switch.isra.0+0x153/0x700 [ 12.299826] ? __switch_to+0x47/0xf50 [ 12.299854] ? __pfx_read_tsc+0x10/0x10 [ 12.299875] ? ktime_get_ts64+0x86/0x230 [ 12.299899] kunit_try_run_case+0x1a5/0x480 [ 12.299924] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.299945] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.300207] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.300231] ? __kthread_parkme+0x82/0x180 [ 12.300252] ? preempt_count_sub+0x50/0x80 [ 12.300274] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.300297] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.300319] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.300342] kthread+0x337/0x6f0 [ 12.300362] ? trace_preempt_on+0x20/0xc0 [ 12.300615] ? __pfx_kthread+0x10/0x10 [ 12.300637] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.300660] ? calculate_sigpending+0x7b/0xa0 [ 12.300683] ? __pfx_kthread+0x10/0x10 [ 12.300704] ret_from_fork+0x116/0x1d0 [ 12.300722] ? __pfx_kthread+0x10/0x10 [ 12.300742] ret_from_fork_asm+0x1a/0x30 [ 12.300804] </TASK> [ 12.300817] [ 12.309935] Allocated by task 230: [ 12.310182] kasan_save_stack+0x45/0x70 [ 12.310734] kasan_save_track+0x18/0x40 [ 12.311002] kasan_save_alloc_info+0x3b/0x50 [ 12.311270] __kasan_slab_alloc+0x91/0xa0 [ 12.311436] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.311611] kmem_cache_rcu_uaf+0x155/0x510 [ 12.311874] kunit_try_run_case+0x1a5/0x480 [ 12.312083] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.312665] kthread+0x337/0x6f0 [ 12.312828] ret_from_fork+0x116/0x1d0 [ 12.313099] ret_from_fork_asm+0x1a/0x30 [ 12.313259] [ 12.313535] Freed by task 0: [ 12.313860] kasan_save_stack+0x45/0x70 [ 12.314005] kasan_save_track+0x18/0x40 [ 12.314225] kasan_save_free_info+0x3f/0x60 [ 12.314489] __kasan_slab_free+0x56/0x70 [ 12.314744] slab_free_after_rcu_debug+0xe4/0x310 [ 12.315089] rcu_core+0x66f/0x1c40 [ 12.315306] rcu_core_si+0x12/0x20 [ 12.315465] handle_softirqs+0x209/0x730 [ 12.315720] __irq_exit_rcu+0xc9/0x110 [ 12.316201] irq_exit_rcu+0x12/0x20 [ 12.316508] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.316860] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.317086] [ 12.317161] Last potentially related work creation: [ 12.317413] kasan_save_stack+0x45/0x70 [ 12.317760] kasan_record_aux_stack+0xb2/0xc0 [ 12.318054] kmem_cache_free+0x131/0x420 [ 12.318242] kmem_cache_rcu_uaf+0x194/0x510 [ 12.318464] kunit_try_run_case+0x1a5/0x480 [ 12.318696] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.319045] kthread+0x337/0x6f0 [ 12.319524] ret_from_fork+0x116/0x1d0 [ 12.319688] ret_from_fork_asm+0x1a/0x30 [ 12.319888] [ 12.320665] The buggy address belongs to the object at ffff88810259d000 [ 12.320665] which belongs to the cache test_cache of size 200 [ 12.321336] The buggy address is located 0 bytes inside of [ 12.321336] freed 200-byte region [ffff88810259d000, ffff88810259d0c8) [ 12.322352] [ 12.322605] The buggy address belongs to the physical page: [ 12.323015] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10259d [ 12.323503] flags: 0x200000000000000(node=0|zone=2) [ 12.323914] page_type: f5(slab) [ 12.324228] raw: 0200000000000000 ffff888102596280 dead000000000122 0000000000000000 [ 12.324792] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.325242] page dumped because: kasan: bad access detected [ 12.325491] [ 12.325592] Memory state around the buggy address: [ 12.325770] ffff88810259cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.326158] ffff88810259cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.326478] >ffff88810259d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.326801] ^ [ 12.327098] ffff88810259d080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.327432] ffff88810259d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.327742] ==================================================================