Date
May 12, 2025, 11:48 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.051207] ================================================================== [ 18.051382] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 18.051697] Read of size 1 at addr fff00000c794e000 by task kunit_try_catch/213 [ 18.051875] [ 18.051990] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT [ 18.052195] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.052255] Hardware name: linux,dummy-virt (DT) [ 18.052423] Call trace: [ 18.052482] show_stack+0x20/0x38 (C) [ 18.052592] dump_stack_lvl+0x8c/0xd0 [ 18.052704] print_report+0x118/0x608 [ 18.052809] kasan_report+0xdc/0x128 [ 18.052909] __asan_report_load1_noabort+0x20/0x30 [ 18.053024] kmem_cache_rcu_uaf+0x388/0x468 [ 18.053125] kunit_try_run_case+0x170/0x3f0 [ 18.053228] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.053340] kthread+0x328/0x630 [ 18.053436] ret_from_fork+0x10/0x20 [ 18.053540] [ 18.053581] Allocated by task 213: [ 18.053647] kasan_save_stack+0x3c/0x68 [ 18.053730] kasan_save_track+0x20/0x40 [ 18.053811] kasan_save_alloc_info+0x40/0x58 [ 18.053885] __kasan_slab_alloc+0xa8/0xb0 [ 18.054547] kmem_cache_alloc_noprof+0x10c/0x3a0 [ 18.054716] kmem_cache_rcu_uaf+0x12c/0x468 [ 18.054807] kunit_try_run_case+0x170/0x3f0 [ 18.055050] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.055166] kthread+0x328/0x630 [ 18.055228] ret_from_fork+0x10/0x20 [ 18.055490] [ 18.055858] Freed by task 0: [ 18.055934] kasan_save_stack+0x3c/0x68 [ 18.056198] kasan_save_track+0x20/0x40 [ 18.056315] kasan_save_free_info+0x4c/0x78 [ 18.056416] __kasan_slab_free+0x6c/0x98 [ 18.056495] slab_free_after_rcu_debug+0xd4/0x2f8 [ 18.056579] rcu_core+0x9f4/0x1e20 [ 18.057034] rcu_core_si+0x18/0x30 [ 18.057516] handle_softirqs+0x374/0xb28 [ 18.057707] __do_softirq+0x1c/0x28 [ 18.057951] [ 18.058092] Last potentially related work creation: [ 18.058187] kasan_save_stack+0x3c/0x68 [ 18.058401] kasan_record_aux_stack+0xb4/0xc8 [ 18.058536] kmem_cache_free+0x120/0x470 [ 18.058621] kmem_cache_rcu_uaf+0x16c/0x468 [ 18.058692] kunit_try_run_case+0x170/0x3f0 [ 18.058764] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.059201] kthread+0x328/0x630 [ 18.059688] ret_from_fork+0x10/0x20 [ 18.059766] [ 18.059981] The buggy address belongs to the object at fff00000c794e000 [ 18.059981] which belongs to the cache test_cache of size 200 [ 18.060322] The buggy address is located 0 bytes inside of [ 18.060322] freed 200-byte region [fff00000c794e000, fff00000c794e0c8) [ 18.060846] [ 18.060956] The buggy address belongs to the physical page: [ 18.061159] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10794e [ 18.061880] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.062226] page_type: f5(slab) [ 18.062611] raw: 0bfffe0000000000 fff00000c1096b40 dead000000000122 0000000000000000 [ 18.063248] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 18.063767] page dumped because: kasan: bad access detected [ 18.063953] [ 18.063996] Memory state around the buggy address: [ 18.064198] fff00000c794df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.064454] fff00000c794df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.064900] >fff00000c794e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.065376] ^ [ 18.065493] fff00000c794e080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 18.065606] fff00000c794e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.066124] ==================================================================
[ 17.653831] ================================================================== [ 17.654907] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 17.655411] Read of size 1 at addr ffff88810231d000 by task kunit_try_catch/230 [ 17.655597] [ 17.655691] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT(voluntary) [ 17.655751] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.655764] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 17.655791] Call Trace: [ 17.655809] <TASK> [ 17.655833] dump_stack_lvl+0x73/0xb0 [ 17.655868] print_report+0xd1/0x650 [ 17.655892] ? __virt_addr_valid+0x1db/0x2d0 [ 17.655921] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 17.655946] ? kasan_complete_mode_report_info+0x64/0x200 [ 17.655969] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 17.655994] kasan_report+0x141/0x180 [ 17.656018] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 17.656047] __asan_report_load1_noabort+0x18/0x20 [ 17.656069] kmem_cache_rcu_uaf+0x3e3/0x510 [ 17.656093] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 17.656118] ? finish_task_switch.isra.0+0x153/0x700 [ 17.656143] ? __switch_to+0x47/0xf50 [ 17.656173] ? __pfx_read_tsc+0x10/0x10 [ 17.656196] ? ktime_get_ts64+0x86/0x230 [ 17.656222] kunit_try_run_case+0x1a5/0x480 [ 17.656250] ? __pfx_kunit_try_run_case+0x10/0x10 [ 17.656883] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 17.656920] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 17.656945] ? __kthread_parkme+0x82/0x180 [ 17.656969] ? preempt_count_sub+0x50/0x80 [ 17.656993] ? __pfx_kunit_try_run_case+0x10/0x10 [ 17.657017] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 17.657062] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 17.657088] kthread+0x337/0x6f0 [ 17.657110] ? trace_preempt_on+0x20/0xc0 [ 17.657136] ? __pfx_kthread+0x10/0x10 [ 17.657158] ? _raw_spin_unlock_irq+0x47/0x80 [ 17.657178] ? calculate_sigpending+0x7b/0xa0 [ 17.657340] ? __pfx_kthread+0x10/0x10 [ 17.657369] ret_from_fork+0x116/0x1d0 [ 17.657392] ? __pfx_kthread+0x10/0x10 [ 17.657414] ret_from_fork_asm+0x1a/0x30 [ 17.657446] </TASK> [ 17.657460] [ 17.666358] Allocated by task 230: [ 17.666916] kasan_save_stack+0x45/0x70 [ 17.667105] kasan_save_track+0x18/0x40 [ 17.667410] kasan_save_alloc_info+0x3b/0x50 [ 17.667674] __kasan_slab_alloc+0x91/0xa0 [ 17.667875] kmem_cache_alloc_noprof+0x123/0x3f0 [ 17.668170] kmem_cache_rcu_uaf+0x155/0x510 [ 17.668449] kunit_try_run_case+0x1a5/0x480 [ 17.668685] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 17.668886] kthread+0x337/0x6f0 [ 17.669004] ret_from_fork+0x116/0x1d0 [ 17.669284] ret_from_fork_asm+0x1a/0x30 [ 17.669463] [ 17.669522] Freed by task 0: [ 17.669634] kasan_save_stack+0x45/0x70 [ 17.669957] kasan_save_track+0x18/0x40 [ 17.670131] kasan_save_free_info+0x3f/0x60 [ 17.670284] __kasan_slab_free+0x56/0x70 [ 17.670386] slab_free_after_rcu_debug+0xe4/0x310 [ 17.670756] rcu_core+0x66f/0x1c40 [ 17.670993] rcu_core_si+0x12/0x20 [ 17.671093] handle_softirqs+0x209/0x730 [ 17.671191] __irq_exit_rcu+0xc9/0x110 [ 17.671296] irq_exit_rcu+0x12/0x20 [ 17.671390] sysvec_apic_timer_interrupt+0x81/0x90 [ 17.671829] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 17.672205] [ 17.672358] Last potentially related work creation: [ 17.672593] kasan_save_stack+0x45/0x70 [ 17.672688] kasan_record_aux_stack+0xb2/0xc0 [ 17.672792] kmem_cache_free+0x131/0x420 [ 17.672996] kmem_cache_rcu_uaf+0x194/0x510 [ 17.673466] kunit_try_run_case+0x1a5/0x480 [ 17.673902] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 17.674283] kthread+0x337/0x6f0 [ 17.674513] ret_from_fork+0x116/0x1d0 [ 17.675135] ret_from_fork_asm+0x1a/0x30 [ 17.675641] [ 17.675965] The buggy address belongs to the object at ffff88810231d000 [ 17.675965] which belongs to the cache test_cache of size 200 [ 17.676695] The buggy address is located 0 bytes inside of [ 17.676695] freed 200-byte region [ffff88810231d000, ffff88810231d0c8) [ 17.677618] [ 17.677928] The buggy address belongs to the physical page: [ 17.678379] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10231d [ 17.678730] flags: 0x200000000000000(node=0|zone=2) [ 17.678871] page_type: f5(slab) [ 17.679115] raw: 0200000000000000 ffff8881009f8b40 dead000000000122 0000000000000000 [ 17.679586] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 17.679890] page dumped because: kasan: bad access detected [ 17.680126] [ 17.680216] Memory state around the buggy address: [ 17.680450] ffff88810231cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.681085] ffff88810231cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.681469] >ffff88810231d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.681780] ^ [ 17.681915] ffff88810231d080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 17.682544] ffff88810231d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.682964] ==================================================================