Date
July 5, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.295546] ================================================================== [ 19.295645] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 19.295724] Read of size 1 at addr fff00000c78c3000 by task kunit_try_catch/213 [ 19.295777] [ 19.295818] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.295912] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.295940] Hardware name: linux,dummy-virt (DT) [ 19.295974] Call trace: [ 19.295996] show_stack+0x20/0x38 (C) [ 19.296342] dump_stack_lvl+0x8c/0xd0 [ 19.297057] print_report+0x118/0x608 [ 19.297721] kasan_report+0xdc/0x128 [ 19.298005] __asan_report_load1_noabort+0x20/0x30 [ 19.298923] kmem_cache_rcu_uaf+0x388/0x468 [ 19.299181] kunit_try_run_case+0x170/0x3f0 [ 19.299575] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.299952] kthread+0x328/0x630 [ 19.300688] ret_from_fork+0x10/0x20 [ 19.301180] [ 19.301203] Allocated by task 213: [ 19.301527] kasan_save_stack+0x3c/0x68 [ 19.301648] kasan_save_track+0x20/0x40 [ 19.302299] kasan_save_alloc_info+0x40/0x58 [ 19.302467] __kasan_slab_alloc+0xa8/0xb0 [ 19.302528] kmem_cache_alloc_noprof+0x10c/0x398 [ 19.303055] kmem_cache_rcu_uaf+0x12c/0x468 [ 19.303431] kunit_try_run_case+0x170/0x3f0 [ 19.303585] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.304323] kthread+0x328/0x630 [ 19.305146] ret_from_fork+0x10/0x20 [ 19.305331] [ 19.305355] Freed by task 0: [ 19.305482] kasan_save_stack+0x3c/0x68 [ 19.305836] kasan_save_track+0x20/0x40 [ 19.306273] kasan_save_free_info+0x4c/0x78 [ 19.306451] __kasan_slab_free+0x6c/0x98 [ 19.306710] slab_free_after_rcu_debug+0xd4/0x2f8 [ 19.306755] rcu_core+0x9f4/0x1e20 [ 19.306792] rcu_core_si+0x18/0x30 [ 19.307609] handle_softirqs+0x374/0xb28 [ 19.308044] __do_softirq+0x1c/0x28 [ 19.308620] [ 19.308650] Last potentially related work creation: [ 19.308710] kasan_save_stack+0x3c/0x68 [ 19.308893] kasan_record_aux_stack+0xb4/0xc8 [ 19.309566] kmem_cache_free+0x120/0x468 [ 19.310141] kmem_cache_rcu_uaf+0x16c/0x468 [ 19.310393] kunit_try_run_case+0x170/0x3f0 [ 19.311006] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.311265] kthread+0x328/0x630 [ 19.311310] ret_from_fork+0x10/0x20 [ 19.311347] [ 19.311367] The buggy address belongs to the object at fff00000c78c3000 [ 19.311367] which belongs to the cache test_cache of size 200 [ 19.312261] The buggy address is located 0 bytes inside of [ 19.312261] freed 200-byte region [fff00000c78c3000, fff00000c78c30c8) [ 19.312801] [ 19.312840] The buggy address belongs to the physical page: [ 19.313385] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078c3 [ 19.313904] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.314047] page_type: f5(slab) [ 19.314299] raw: 0bfffe0000000000 fff00000c78c0000 dead000000000122 0000000000000000 [ 19.314374] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.314416] page dumped because: kasan: bad access detected [ 19.314447] [ 19.315531] Memory state around the buggy address: [ 19.315826] fff00000c78c2f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.316342] fff00000c78c2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.316405] >fff00000c78c3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.316589] ^ [ 19.316891] fff00000c78c3080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.317391] fff00000c78c3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.317560] ==================================================================
[ 14.486347] ================================================================== [ 14.487006] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.487526] Read of size 1 at addr ffff888103926000 by task kunit_try_catch/231 [ 14.487899] [ 14.488012] CPU: 0 UID: 0 PID: 231 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 14.488067] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.488080] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.488105] Call Trace: [ 14.488121] <TASK> [ 14.488143] dump_stack_lvl+0x73/0xb0 [ 14.488181] print_report+0xd1/0x650 [ 14.488207] ? __virt_addr_valid+0x1db/0x2d0 [ 14.488235] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.488261] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.488288] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.488313] kasan_report+0x141/0x180 [ 14.488338] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.488369] __asan_report_load1_noabort+0x18/0x20 [ 14.488397] kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.488422] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 14.488532] ? finish_task_switch.isra.0+0x153/0x700 [ 14.488560] ? __switch_to+0x47/0xf50 [ 14.488594] ? __pfx_read_tsc+0x10/0x10 [ 14.488618] ? ktime_get_ts64+0x86/0x230 [ 14.488645] kunit_try_run_case+0x1a5/0x480 [ 14.488675] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.488699] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.488726] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.488751] ? __kthread_parkme+0x82/0x180 [ 14.488775] ? preempt_count_sub+0x50/0x80 [ 14.488809] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.488835] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.488860] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.488886] kthread+0x337/0x6f0 [ 14.488907] ? trace_preempt_on+0x20/0xc0 [ 14.488934] ? __pfx_kthread+0x10/0x10 [ 14.488956] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.488979] ? calculate_sigpending+0x7b/0xa0 [ 14.489006] ? __pfx_kthread+0x10/0x10 [ 14.489029] ret_from_fork+0x116/0x1d0 [ 14.489050] ? __pfx_kthread+0x10/0x10 [ 14.489072] ret_from_fork_asm+0x1a/0x30 [ 14.489107] </TASK> [ 14.489121] [ 14.500477] Allocated by task 231: [ 14.500746] kasan_save_stack+0x45/0x70 [ 14.501019] kasan_save_track+0x18/0x40 [ 14.501218] kasan_save_alloc_info+0x3b/0x50 [ 14.501390] __kasan_slab_alloc+0x91/0xa0 [ 14.501731] kmem_cache_alloc_noprof+0x123/0x3f0 [ 14.502014] kmem_cache_rcu_uaf+0x155/0x510 [ 14.502240] kunit_try_run_case+0x1a5/0x480 [ 14.502810] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.503086] kthread+0x337/0x6f0 [ 14.503290] ret_from_fork+0x116/0x1d0 [ 14.503605] ret_from_fork_asm+0x1a/0x30 [ 14.503885] [ 14.504005] Freed by task 0: [ 14.504238] kasan_save_stack+0x45/0x70 [ 14.504393] kasan_save_track+0x18/0x40 [ 14.504541] kasan_save_free_info+0x3f/0x60 [ 14.504718] __kasan_slab_free+0x56/0x70 [ 14.504958] slab_free_after_rcu_debug+0xe4/0x310 [ 14.505325] rcu_core+0x66f/0x1c40 [ 14.505629] rcu_core_si+0x12/0x20 [ 14.505859] handle_softirqs+0x209/0x730 [ 14.506082] __irq_exit_rcu+0xc9/0x110 [ 14.506232] irq_exit_rcu+0x12/0x20 [ 14.506373] sysvec_apic_timer_interrupt+0x81/0x90 [ 14.506613] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 14.506923] [ 14.507050] Last potentially related work creation: [ 14.507675] kasan_save_stack+0x45/0x70 [ 14.507958] kasan_record_aux_stack+0xb2/0xc0 [ 14.508331] kmem_cache_free+0x131/0x420 [ 14.508723] kmem_cache_rcu_uaf+0x194/0x510 [ 14.509667] kunit_try_run_case+0x1a5/0x480 [ 14.509872] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.510176] kthread+0x337/0x6f0 [ 14.510670] ret_from_fork+0x116/0x1d0 [ 14.510908] ret_from_fork_asm+0x1a/0x30 [ 14.511138] [ 14.511480] The buggy address belongs to the object at ffff888103926000 [ 14.511480] which belongs to the cache test_cache of size 200 [ 14.512587] The buggy address is located 0 bytes inside of [ 14.512587] freed 200-byte region [ffff888103926000, ffff8881039260c8) [ 14.513445] [ 14.513682] The buggy address belongs to the physical page: [ 14.513954] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103926 [ 14.514429] flags: 0x200000000000000(node=0|zone=2) [ 14.514749] page_type: f5(slab) [ 14.514958] raw: 0200000000000000 ffff888103923000 dead000000000122 0000000000000000 [ 14.515521] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 14.515931] page dumped because: kasan: bad access detected [ 14.516363] [ 14.516876] Memory state around the buggy address: [ 14.517128] ffff888103925f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.517660] ffff888103925f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.518004] >ffff888103926000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.518487] ^ [ 14.518637] ffff888103926080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 14.519574] ffff888103926100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.519916] ==================================================================