Date
July 8, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.381303] ================================================================== [ 20.381400] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 20.381478] Read of size 1 at addr fff00000c7730000 by task kunit_try_catch/213 [ 20.382868] [ 20.382932] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 20.383360] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.383724] Hardware name: linux,dummy-virt (DT) [ 20.383891] Call trace: [ 20.383956] show_stack+0x20/0x38 (C) [ 20.384015] dump_stack_lvl+0x8c/0xd0 [ 20.384069] print_report+0x118/0x608 [ 20.384367] kasan_report+0xdc/0x128 [ 20.384605] __asan_report_load1_noabort+0x20/0x30 [ 20.384658] kmem_cache_rcu_uaf+0x388/0x468 [ 20.385069] kunit_try_run_case+0x170/0x3f0 [ 20.385152] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.385800] kthread+0x328/0x630 [ 20.386149] ret_from_fork+0x10/0x20 [ 20.386454] [ 20.386542] Allocated by task 213: [ 20.386574] kasan_save_stack+0x3c/0x68 [ 20.386854] kasan_save_track+0x20/0x40 [ 20.387003] kasan_save_alloc_info+0x40/0x58 [ 20.387071] __kasan_slab_alloc+0xa8/0xb0 [ 20.387319] kmem_cache_alloc_noprof+0x10c/0x398 [ 20.387815] kmem_cache_rcu_uaf+0x12c/0x468 [ 20.387904] kunit_try_run_case+0x170/0x3f0 [ 20.387941] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.387985] kthread+0x328/0x630 [ 20.388505] ret_from_fork+0x10/0x20 [ 20.388555] [ 20.388589] Freed by task 0: [ 20.388617] kasan_save_stack+0x3c/0x68 [ 20.388792] kasan_save_track+0x20/0x40 [ 20.388829] kasan_save_free_info+0x4c/0x78 [ 20.388869] __kasan_slab_free+0x6c/0x98 [ 20.389284] slab_free_after_rcu_debug+0xd4/0x2f8 [ 20.389512] rcu_core+0x9f4/0x1e20 [ 20.389643] rcu_core_si+0x18/0x30 [ 20.389882] handle_softirqs+0x374/0xb28 [ 20.390052] __do_softirq+0x1c/0x28 [ 20.390088] [ 20.390281] Last potentially related work creation: [ 20.390315] kasan_save_stack+0x3c/0x68 [ 20.390631] kasan_record_aux_stack+0xb4/0xc8 [ 20.390676] kmem_cache_free+0x120/0x468 [ 20.390714] kmem_cache_rcu_uaf+0x16c/0x468 [ 20.391177] kunit_try_run_case+0x170/0x3f0 [ 20.391228] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.391354] kthread+0x328/0x630 [ 20.391388] ret_from_fork+0x10/0x20 [ 20.391663] [ 20.391844] The buggy address belongs to the object at fff00000c7730000 [ 20.391844] which belongs to the cache test_cache of size 200 [ 20.391924] The buggy address is located 0 bytes inside of [ 20.391924] freed 200-byte region [fff00000c7730000, fff00000c77300c8) [ 20.392282] [ 20.392307] The buggy address belongs to the physical page: [ 20.392342] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107730 [ 20.392401] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.392454] page_type: f5(slab) [ 20.392497] raw: 0bfffe0000000000 fff00000c63df3c0 dead000000000122 0000000000000000 [ 20.392550] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 20.392591] page dumped because: kasan: bad access detected [ 20.392623] [ 20.392641] Memory state around the buggy address: [ 20.392675] fff00000c772ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.392719] fff00000c772ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.393371] >fff00000c7730000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.393456] ^ [ 20.393486] fff00000c7730080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 20.393690] fff00000c7730100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.394073] ==================================================================
[ 13.337123] ================================================================== [ 13.337655] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.337983] Read of size 1 at addr ffff888102b96000 by task kunit_try_catch/231 [ 13.338284] [ 13.338388] CPU: 0 UID: 0 PID: 231 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.338439] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.338450] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.338474] Call Trace: [ 13.338487] <TASK> [ 13.338507] dump_stack_lvl+0x73/0xb0 [ 13.338541] print_report+0xd1/0x650 [ 13.338564] ? __virt_addr_valid+0x1db/0x2d0 [ 13.338590] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.338647] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.338670] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.338694] kasan_report+0x141/0x180 [ 13.338716] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.338744] __asan_report_load1_noabort+0x18/0x20 [ 13.338769] kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.338792] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 13.338815] ? finish_task_switch.isra.0+0x153/0x700 [ 13.338840] ? __switch_to+0x47/0xf50 [ 13.338870] ? __pfx_read_tsc+0x10/0x10 [ 13.338893] ? ktime_get_ts64+0x86/0x230 [ 13.338918] kunit_try_run_case+0x1a5/0x480 [ 13.339228] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.339254] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.339280] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.339305] ? __kthread_parkme+0x82/0x180 [ 13.339327] ? preempt_count_sub+0x50/0x80 [ 13.339351] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.339375] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.339400] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.339426] kthread+0x337/0x6f0 [ 13.339444] ? trace_preempt_on+0x20/0xc0 [ 13.339469] ? __pfx_kthread+0x10/0x10 [ 13.339498] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.339545] ? calculate_sigpending+0x7b/0xa0 [ 13.339570] ? __pfx_kthread+0x10/0x10 [ 13.339592] ret_from_fork+0x116/0x1d0 [ 13.339621] ? __pfx_kthread+0x10/0x10 [ 13.339641] ret_from_fork_asm+0x1a/0x30 [ 13.339674] </TASK> [ 13.339685] [ 13.351051] Allocated by task 231: [ 13.351244] kasan_save_stack+0x45/0x70 [ 13.351472] kasan_save_track+0x18/0x40 [ 13.351848] kasan_save_alloc_info+0x3b/0x50 [ 13.352367] __kasan_slab_alloc+0x91/0xa0 [ 13.352709] kmem_cache_alloc_noprof+0x123/0x3f0 [ 13.352898] kmem_cache_rcu_uaf+0x155/0x510 [ 13.353431] kunit_try_run_case+0x1a5/0x480 [ 13.353723] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.354167] kthread+0x337/0x6f0 [ 13.354340] ret_from_fork+0x116/0x1d0 [ 13.354698] ret_from_fork_asm+0x1a/0x30 [ 13.355073] [ 13.355171] Freed by task 0: [ 13.355292] kasan_save_stack+0x45/0x70 [ 13.355762] kasan_save_track+0x18/0x40 [ 13.356096] kasan_save_free_info+0x3f/0x60 [ 13.356268] __kasan_slab_free+0x56/0x70 [ 13.356469] slab_free_after_rcu_debug+0xe4/0x310 [ 13.356832] rcu_core+0x66f/0x1c40 [ 13.356971] rcu_core_si+0x12/0x20 [ 13.357240] handle_softirqs+0x209/0x730 [ 13.357445] __irq_exit_rcu+0xc9/0x110 [ 13.357903] irq_exit_rcu+0x12/0x20 [ 13.358138] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.358367] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.358593] [ 13.358685] Last potentially related work creation: [ 13.358887] kasan_save_stack+0x45/0x70 [ 13.359384] kasan_record_aux_stack+0xb2/0xc0 [ 13.359559] kmem_cache_free+0x131/0x420 [ 13.359963] kmem_cache_rcu_uaf+0x194/0x510 [ 13.360335] kunit_try_run_case+0x1a5/0x480 [ 13.360531] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.361125] kthread+0x337/0x6f0 [ 13.361392] ret_from_fork+0x116/0x1d0 [ 13.361682] ret_from_fork_asm+0x1a/0x30 [ 13.361919] [ 13.362223] The buggy address belongs to the object at ffff888102b96000 [ 13.362223] which belongs to the cache test_cache of size 200 [ 13.362903] The buggy address is located 0 bytes inside of [ 13.362903] freed 200-byte region [ffff888102b96000, ffff888102b960c8) [ 13.363753] [ 13.364055] The buggy address belongs to the physical page: [ 13.364373] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b96 [ 13.365105] flags: 0x200000000000000(node=0|zone=2) [ 13.365333] page_type: f5(slab) [ 13.365505] raw: 0200000000000000 ffff888102b91140 dead000000000122 0000000000000000 [ 13.365896] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 13.366418] page dumped because: kasan: bad access detected [ 13.366752] [ 13.366852] Memory state around the buggy address: [ 13.367050] ffff888102b95f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.367455] ffff888102b95f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.367807] >ffff888102b96000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.368122] ^ [ 13.368235] ffff888102b96080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 13.368820] ffff888102b96100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.369222] ==================================================================