Date
June 5, 2025, 7:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 26.963944] ================================================================== [ 26.964263] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 26.964780] Read of size 1 at addr fff00000c7760000 by task kunit_try_catch/213 [ 26.964950] [ 26.965048] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250605 #1 PREEMPT [ 26.965402] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.965589] Hardware name: linux,dummy-virt (DT) [ 26.965675] Call trace: [ 26.965831] show_stack+0x20/0x38 (C) [ 26.966342] dump_stack_lvl+0x8c/0xd0 [ 26.966479] print_report+0x118/0x608 [ 26.966594] kasan_report+0xdc/0x128 [ 26.966981] __asan_report_load1_noabort+0x20/0x30 [ 26.967224] kmem_cache_rcu_uaf+0x388/0x468 [ 26.967740] kunit_try_run_case+0x170/0x3f0 [ 26.968155] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.968370] kthread+0x328/0x630 [ 26.968531] ret_from_fork+0x10/0x20 [ 26.968892] [ 26.969024] Allocated by task 213: [ 26.969140] kasan_save_stack+0x3c/0x68 [ 26.969322] kasan_save_track+0x20/0x40 [ 26.969510] kasan_save_alloc_info+0x40/0x58 [ 26.969788] __kasan_slab_alloc+0xa8/0xb0 [ 26.969890] kmem_cache_alloc_noprof+0x10c/0x398 [ 26.969999] kmem_cache_rcu_uaf+0x12c/0x468 [ 26.970089] kunit_try_run_case+0x170/0x3f0 [ 26.970184] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.970296] kthread+0x328/0x630 [ 26.971252] ret_from_fork+0x10/0x20 [ 26.971385] [ 26.971548] Freed by task 0: [ 26.971640] kasan_save_stack+0x3c/0x68 [ 26.971935] kasan_save_track+0x20/0x40 [ 26.972214] kasan_save_free_info+0x4c/0x78 [ 26.972316] __kasan_slab_free+0x6c/0x98 [ 26.972436] slab_free_after_rcu_debug+0xd4/0x2f8 [ 26.972606] rcu_core+0x9f4/0x1e20 [ 26.972744] rcu_core_si+0x18/0x30 [ 26.972986] handle_softirqs+0x374/0xb28 [ 26.973125] __do_softirq+0x1c/0x28 [ 26.973220] [ 26.973270] Last potentially related work creation: [ 26.973438] kasan_save_stack+0x3c/0x68 [ 26.973586] kasan_record_aux_stack+0xb4/0xc8 [ 26.973680] kmem_cache_free+0x120/0x468 [ 26.973807] kmem_cache_rcu_uaf+0x16c/0x468 [ 26.974071] kunit_try_run_case+0x170/0x3f0 [ 26.974352] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.974471] kthread+0x328/0x630 [ 26.974573] ret_from_fork+0x10/0x20 [ 26.974675] [ 26.974733] The buggy address belongs to the object at fff00000c7760000 [ 26.974733] which belongs to the cache test_cache of size 200 [ 26.975630] The buggy address is located 0 bytes inside of [ 26.975630] freed 200-byte region [fff00000c7760000, fff00000c77600c8) [ 26.975734] [ 26.975761] The buggy address belongs to the physical page: [ 26.975818] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107760 [ 26.975940] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 26.976009] page_type: f5(slab) [ 26.976061] raw: 0bfffe0000000000 fff00000c11a6c80 dead000000000122 0000000000000000 [ 26.976124] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 26.976177] page dumped because: kasan: bad access detected [ 26.976217] [ 26.976237] Memory state around the buggy address: [ 26.976279] fff00000c775ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 26.976370] fff00000c775ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 26.976657] >fff00000c7760000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.976770] ^ [ 26.976851] fff00000c7760080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.977247] fff00000c7760100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.977494] ==================================================================
[ 12.207149] ================================================================== [ 12.207659] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.208126] Read of size 1 at addr ffff888102789000 by task kunit_try_catch/230 [ 12.208406] [ 12.208531] CPU: 1 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250605 #1 PREEMPT(voluntary) [ 12.208579] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.208590] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.208612] Call Trace: [ 12.208624] <TASK> [ 12.208641] dump_stack_lvl+0x73/0xb0 [ 12.208669] print_report+0xd1/0x650 [ 12.208691] ? __virt_addr_valid+0x1db/0x2d0 [ 12.208716] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.208738] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.208761] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.208820] kasan_report+0x141/0x180 [ 12.208842] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.208880] __asan_report_load1_noabort+0x18/0x20 [ 12.208912] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.208935] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.208957] ? finish_task_switch.isra.0+0x153/0x700 [ 12.208979] ? __switch_to+0x47/0xf50 [ 12.209008] ? __pfx_read_tsc+0x10/0x10 [ 12.209030] ? ktime_get_ts64+0x86/0x230 [ 12.209105] kunit_try_run_case+0x1a5/0x480 [ 12.209130] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.209149] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.209175] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.209199] ? __kthread_parkme+0x82/0x180 [ 12.209219] ? preempt_count_sub+0x50/0x80 [ 12.209241] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.209261] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.209285] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.209309] kthread+0x337/0x6f0 [ 12.209328] ? trace_preempt_on+0x20/0xc0 [ 12.209351] ? __pfx_kthread+0x10/0x10 [ 12.209371] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.209392] ? calculate_sigpending+0x7b/0xa0 [ 12.209416] ? __pfx_kthread+0x10/0x10 [ 12.209436] ret_from_fork+0x116/0x1d0 [ 12.209454] ? __pfx_kthread+0x10/0x10 [ 12.209474] ret_from_fork_asm+0x1a/0x30 [ 12.209504] </TASK> [ 12.209515] [ 12.220368] Allocated by task 230: [ 12.220621] kasan_save_stack+0x45/0x70 [ 12.221008] kasan_save_track+0x18/0x40 [ 12.221392] kasan_save_alloc_info+0x3b/0x50 [ 12.221593] __kasan_slab_alloc+0x91/0xa0 [ 12.221991] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.222338] kmem_cache_rcu_uaf+0x155/0x510 [ 12.222608] kunit_try_run_case+0x1a5/0x480 [ 12.222850] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.223335] kthread+0x337/0x6f0 [ 12.223467] ret_from_fork+0x116/0x1d0 [ 12.223791] ret_from_fork_asm+0x1a/0x30 [ 12.224149] [ 12.224352] Freed by task 0: [ 12.224484] kasan_save_stack+0x45/0x70 [ 12.224954] kasan_save_track+0x18/0x40 [ 12.225136] kasan_save_free_info+0x3f/0x60 [ 12.225343] __kasan_slab_free+0x56/0x70 [ 12.225524] slab_free_after_rcu_debug+0xe4/0x310 [ 12.226221] rcu_core+0x66f/0x1c40 [ 12.226390] rcu_core_si+0x12/0x20 [ 12.226518] handle_softirqs+0x209/0x730 [ 12.226951] __irq_exit_rcu+0xc9/0x110 [ 12.227337] irq_exit_rcu+0x12/0x20 [ 12.227522] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.227751] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.228252] [ 12.228332] Last potentially related work creation: [ 12.228730] kasan_save_stack+0x45/0x70 [ 12.229163] kasan_record_aux_stack+0xb2/0xc0 [ 12.229395] kmem_cache_free+0x131/0x420 [ 12.229669] kmem_cache_rcu_uaf+0x194/0x510 [ 12.229870] kunit_try_run_case+0x1a5/0x480 [ 12.230334] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.230655] kthread+0x337/0x6f0 [ 12.230855] ret_from_fork+0x116/0x1d0 [ 12.231242] ret_from_fork_asm+0x1a/0x30 [ 12.231400] [ 12.231496] The buggy address belongs to the object at ffff888102789000 [ 12.231496] which belongs to the cache test_cache of size 200 [ 12.232681] The buggy address is located 0 bytes inside of [ 12.232681] freed 200-byte region [ffff888102789000, ffff8881027890c8) [ 12.233334] [ 12.233442] The buggy address belongs to the physical page: [ 12.233909] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102789 [ 12.234373] flags: 0x200000000000000(node=0|zone=2) [ 12.234587] page_type: f5(slab) [ 12.235045] raw: 0200000000000000 ffff8881018ce280 dead000000000122 0000000000000000 [ 12.235361] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.235796] page dumped because: kasan: bad access detected [ 12.236220] [ 12.236322] Memory state around the buggy address: [ 12.236698] ffff888102788f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.237178] ffff888102788f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.237570] >ffff888102789000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.238123] ^ [ 12.238264] ffff888102789080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.238597] ffff888102789100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.239159] ==================================================================