Date
July 20, 2025, 8:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.343114] ================================================================== [ 16.343547] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 16.343817] Read of size 1 at addr fff00000c7706000 by task kunit_try_catch/214 [ 16.344171] [ 16.344246] CPU: 1 UID: 0 PID: 214 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.344664] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.344726] Hardware name: linux,dummy-virt (DT) [ 16.344763] Call trace: [ 16.344789] show_stack+0x20/0x38 (C) [ 16.344846] dump_stack_lvl+0x8c/0xd0 [ 16.344955] print_report+0x118/0x5d0 [ 16.345159] kasan_report+0xdc/0x128 [ 16.345375] __asan_report_load1_noabort+0x20/0x30 [ 16.345661] kmem_cache_rcu_uaf+0x388/0x468 [ 16.346037] kunit_try_run_case+0x170/0x3f0 [ 16.346143] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.346458] kthread+0x328/0x630 [ 16.346521] ret_from_fork+0x10/0x20 [ 16.347039] [ 16.347069] Allocated by task 214: [ 16.347116] kasan_save_stack+0x3c/0x68 [ 16.347617] kasan_save_track+0x20/0x40 [ 16.347745] kasan_save_alloc_info+0x40/0x58 [ 16.347821] __kasan_slab_alloc+0xa8/0xb0 [ 16.347886] kmem_cache_alloc_noprof+0x10c/0x398 [ 16.348122] kmem_cache_rcu_uaf+0x12c/0x468 [ 16.348507] kunit_try_run_case+0x170/0x3f0 [ 16.348704] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.348963] kthread+0x328/0x630 [ 16.349006] ret_from_fork+0x10/0x20 [ 16.349059] [ 16.349079] Freed by task 0: [ 16.349563] kasan_save_stack+0x3c/0x68 [ 16.349839] kasan_save_track+0x20/0x40 [ 16.349908] kasan_save_free_info+0x4c/0x78 [ 16.349954] __kasan_slab_free+0x6c/0x98 [ 16.351477] slab_free_after_rcu_debug+0xd4/0x2f8 [ 16.351912] rcu_core+0x9f4/0x1e20 [ 16.352305] rcu_core_si+0x18/0x30 [ 16.352380] handle_softirqs+0x374/0xb28 [ 16.352445] __do_softirq+0x1c/0x28 [ 16.352504] [ 16.352817] Last potentially related work creation: [ 16.353093] kasan_save_stack+0x3c/0x68 [ 16.353149] kasan_record_aux_stack+0xb4/0xc8 [ 16.353553] kmem_cache_free+0x120/0x468 [ 16.353732] kmem_cache_rcu_uaf+0x16c/0x468 [ 16.353797] kunit_try_run_case+0x170/0x3f0 [ 16.353843] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.354043] kthread+0x328/0x630 [ 16.354294] ret_from_fork+0x10/0x20 [ 16.354558] [ 16.354631] The buggy address belongs to the object at fff00000c7706000 [ 16.354631] which belongs to the cache test_cache of size 200 [ 16.354843] The buggy address is located 0 bytes inside of [ 16.354843] freed 200-byte region [fff00000c7706000, fff00000c77060c8) [ 16.355115] [ 16.355179] The buggy address belongs to the physical page: [ 16.355494] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107706 [ 16.355596] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.355837] page_type: f5(slab) [ 16.356033] raw: 0bfffe0000000000 fff00000c5bc0780 dead000000000122 0000000000000000 [ 16.356299] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 16.356571] page dumped because: kasan: bad access detected [ 16.356638] [ 16.356691] Memory state around the buggy address: [ 16.356818] fff00000c7705f00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 16.356888] fff00000c7705f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.357029] >fff00000c7706000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.357097] ^ [ 16.357135] fff00000c7706080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 16.358061] fff00000c7706100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.358238] ==================================================================
[ 13.741419] ================================================================== [ 13.741936] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.742311] Read of size 1 at addr ffff888103263000 by task kunit_try_catch/231 [ 13.742638] [ 13.742756] CPU: 0 UID: 0 PID: 231 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 13.742806] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.742818] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.742841] Call Trace: [ 13.742855] <TASK> [ 13.742872] dump_stack_lvl+0x73/0xb0 [ 13.742905] print_report+0xd1/0x610 [ 13.742928] ? __virt_addr_valid+0x1db/0x2d0 [ 13.742952] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.742975] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.742996] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.743503] kasan_report+0x141/0x180 [ 13.743533] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.743562] __asan_report_load1_noabort+0x18/0x20 [ 13.743586] kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.743609] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 13.743632] ? finish_task_switch.isra.0+0x153/0x700 [ 13.743658] ? __switch_to+0x47/0xf50 [ 13.743689] ? __pfx_read_tsc+0x10/0x10 [ 13.743711] ? ktime_get_ts64+0x86/0x230 [ 13.743737] kunit_try_run_case+0x1a5/0x480 [ 13.743763] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.743801] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.743827] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.743851] ? __kthread_parkme+0x82/0x180 [ 13.743873] ? preempt_count_sub+0x50/0x80 [ 13.743895] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.743919] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.744195] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.744221] kthread+0x337/0x6f0 [ 13.744242] ? trace_preempt_on+0x20/0xc0 [ 13.744269] ? __pfx_kthread+0x10/0x10 [ 13.744290] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.744313] ? calculate_sigpending+0x7b/0xa0 [ 13.744339] ? __pfx_kthread+0x10/0x10 [ 13.744360] ret_from_fork+0x116/0x1d0 [ 13.744380] ? __pfx_kthread+0x10/0x10 [ 13.744402] ret_from_fork_asm+0x1a/0x30 [ 13.744433] </TASK> [ 13.744445] [ 13.754352] Allocated by task 231: [ 13.754569] kasan_save_stack+0x45/0x70 [ 13.754780] kasan_save_track+0x18/0x40 [ 13.755385] kasan_save_alloc_info+0x3b/0x50 [ 13.755579] __kasan_slab_alloc+0x91/0xa0 [ 13.755883] kmem_cache_alloc_noprof+0x123/0x3f0 [ 13.756281] kmem_cache_rcu_uaf+0x155/0x510 [ 13.756510] kunit_try_run_case+0x1a5/0x480 [ 13.756709] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.757282] kthread+0x337/0x6f0 [ 13.757422] ret_from_fork+0x116/0x1d0 [ 13.757716] ret_from_fork_asm+0x1a/0x30 [ 13.757927] [ 13.758004] Freed by task 0: [ 13.758176] kasan_save_stack+0x45/0x70 [ 13.758484] kasan_save_track+0x18/0x40 [ 13.758634] kasan_save_free_info+0x3f/0x60 [ 13.758881] __kasan_slab_free+0x56/0x70 [ 13.759437] slab_free_after_rcu_debug+0xe4/0x310 [ 13.759751] rcu_core+0x66f/0x1c40 [ 13.759916] rcu_core_si+0x12/0x20 [ 13.760455] handle_softirqs+0x209/0x730 [ 13.760679] __irq_exit_rcu+0xc9/0x110 [ 13.760825] irq_exit_rcu+0x12/0x20 [ 13.761013] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.761526] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.761831] [ 13.761917] Last potentially related work creation: [ 13.762252] kasan_save_stack+0x45/0x70 [ 13.762438] kasan_record_aux_stack+0xb2/0xc0 [ 13.762650] kmem_cache_free+0x131/0x420 [ 13.763120] kmem_cache_rcu_uaf+0x194/0x510 [ 13.763339] kunit_try_run_case+0x1a5/0x480 [ 13.763554] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.763964] kthread+0x337/0x6f0 [ 13.764171] ret_from_fork+0x116/0x1d0 [ 13.764405] ret_from_fork_asm+0x1a/0x30 [ 13.764629] [ 13.764723] The buggy address belongs to the object at ffff888103263000 [ 13.764723] which belongs to the cache test_cache of size 200 [ 13.765518] The buggy address is located 0 bytes inside of [ 13.765518] freed 200-byte region [ffff888103263000, ffff8881032630c8) [ 13.766369] [ 13.766491] The buggy address belongs to the physical page: [ 13.766897] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103263 [ 13.767292] flags: 0x200000000000000(node=0|zone=2) [ 13.767558] page_type: f5(slab) [ 13.767701] raw: 0200000000000000 ffff888103260000 dead000000000122 0000000000000000 [ 13.768054] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 13.768444] page dumped because: kasan: bad access detected [ 13.768673] [ 13.768771] Memory state around the buggy address: [ 13.768988] ffff888103262f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.769294] ffff888103262f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.769625] >ffff888103263000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.770112] ^ [ 13.770328] ffff888103263080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 13.770563] ffff888103263100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.770937] ==================================================================