Date
June 16, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.022067] ================================================================== [ 21.022369] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 21.022555] Read of size 1 at addr fff00000c7736000 by task kunit_try_catch/222 [ 21.022667] [ 21.022767] CPU: 0 UID: 0 PID: 222 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT [ 21.022986] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.023105] Hardware name: linux,dummy-virt (DT) [ 21.023257] Call trace: [ 21.023391] show_stack+0x20/0x38 (C) [ 21.023577] dump_stack_lvl+0x8c/0xd0 [ 21.023735] print_report+0x118/0x608 [ 21.023946] kasan_report+0xdc/0x128 [ 21.024133] __asan_report_load1_noabort+0x20/0x30 [ 21.024332] kmem_cache_rcu_uaf+0x388/0x468 [ 21.024549] kunit_try_run_case+0x170/0x3f0 [ 21.024727] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.024931] kthread+0x328/0x630 [ 21.025035] ret_from_fork+0x10/0x20 [ 21.025219] [ 21.025306] Allocated by task 222: [ 21.025385] kasan_save_stack+0x3c/0x68 [ 21.025499] kasan_save_track+0x20/0x40 [ 21.026017] kasan_save_alloc_info+0x40/0x58 [ 21.026112] __kasan_slab_alloc+0xa8/0xb0 [ 21.026219] kmem_cache_alloc_noprof+0x10c/0x398 [ 21.026328] kmem_cache_rcu_uaf+0x12c/0x468 [ 21.026430] kunit_try_run_case+0x170/0x3f0 [ 21.026534] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.026648] kthread+0x328/0x630 [ 21.026953] ret_from_fork+0x10/0x20 [ 21.027063] [ 21.027092] Freed by task 0: [ 21.027135] kasan_save_stack+0x3c/0x68 [ 21.027183] kasan_save_track+0x20/0x40 [ 21.027229] kasan_save_free_info+0x4c/0x78 [ 21.027271] __kasan_slab_free+0x6c/0x98 [ 21.027318] slab_free_after_rcu_debug+0xd4/0x2f8 [ 21.027365] rcu_core+0x9f4/0x1e20 [ 21.027408] rcu_core_si+0x18/0x30 [ 21.027446] handle_softirqs+0x374/0xb28 [ 21.027487] __do_softirq+0x1c/0x28 [ 21.027527] [ 21.027549] Last potentially related work creation: [ 21.027581] kasan_save_stack+0x3c/0x68 [ 21.027626] kasan_record_aux_stack+0xb4/0xc8 [ 21.027667] kmem_cache_free+0x120/0x468 [ 21.027710] kmem_cache_rcu_uaf+0x16c/0x468 [ 21.027749] kunit_try_run_case+0x170/0x3f0 [ 21.027792] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.027863] kthread+0x328/0x630 [ 21.027929] ret_from_fork+0x10/0x20 [ 21.028003] [ 21.028044] The buggy address belongs to the object at fff00000c7736000 [ 21.028044] which belongs to the cache test_cache of size 200 [ 21.028218] The buggy address is located 0 bytes inside of [ 21.028218] freed 200-byte region [fff00000c7736000, fff00000c77360c8) [ 21.028470] [ 21.028524] The buggy address belongs to the physical page: [ 21.028698] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107736 [ 21.028848] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.029224] page_type: f5(slab) [ 21.029341] raw: 0bfffe0000000000 fff00000c10ddb40 dead000000000122 0000000000000000 [ 21.029562] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 21.029695] page dumped because: kasan: bad access detected [ 21.029898] [ 21.029951] Memory state around the buggy address: [ 21.030144] fff00000c7735f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 21.030334] fff00000c7735f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 21.030564] >fff00000c7736000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.030674] ^ [ 21.031051] fff00000c7736080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 21.031320] fff00000c7736100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.031524] ==================================================================
[ 12.271584] ================================================================== [ 12.272125] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.272777] Read of size 1 at addr ffff8881028d3000 by task kunit_try_catch/238 [ 12.273090] [ 12.273199] CPU: 1 UID: 0 PID: 238 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT(voluntary) [ 12.273504] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.273518] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.273561] Call Trace: [ 12.273577] <TASK> [ 12.273612] dump_stack_lvl+0x73/0xb0 [ 12.273647] print_report+0xd1/0x650 [ 12.273672] ? __virt_addr_valid+0x1db/0x2d0 [ 12.273705] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.273728] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.273750] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.273773] kasan_report+0x141/0x180 [ 12.273794] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.273820] __asan_report_load1_noabort+0x18/0x20 [ 12.273843] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.273866] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.273889] ? finish_task_switch.isra.0+0x153/0x700 [ 12.273911] ? __switch_to+0x47/0xf50 [ 12.273952] ? __pfx_read_tsc+0x10/0x10 [ 12.273974] ? ktime_get_ts64+0x86/0x230 [ 12.274001] kunit_try_run_case+0x1a5/0x480 [ 12.274026] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.274047] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.274072] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.274094] ? __kthread_parkme+0x82/0x180 [ 12.274115] ? preempt_count_sub+0x50/0x80 [ 12.274137] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.274159] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.274194] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.274217] kthread+0x337/0x6f0 [ 12.274236] ? trace_preempt_on+0x20/0xc0 [ 12.274260] ? __pfx_kthread+0x10/0x10 [ 12.274281] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.274301] ? calculate_sigpending+0x7b/0xa0 [ 12.274325] ? __pfx_kthread+0x10/0x10 [ 12.274345] ret_from_fork+0x116/0x1d0 [ 12.274363] ? __pfx_kthread+0x10/0x10 [ 12.274383] ret_from_fork_asm+0x1a/0x30 [ 12.274414] </TASK> [ 12.274425] [ 12.282298] Allocated by task 238: [ 12.282523] kasan_save_stack+0x45/0x70 [ 12.283008] kasan_save_track+0x18/0x40 [ 12.283235] kasan_save_alloc_info+0x3b/0x50 [ 12.283446] __kasan_slab_alloc+0x91/0xa0 [ 12.283755] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.283941] kmem_cache_rcu_uaf+0x155/0x510 [ 12.284135] kunit_try_run_case+0x1a5/0x480 [ 12.284283] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.284651] kthread+0x337/0x6f0 [ 12.284879] ret_from_fork+0x116/0x1d0 [ 12.285122] ret_from_fork_asm+0x1a/0x30 [ 12.285253] [ 12.285316] Freed by task 0: [ 12.285415] kasan_save_stack+0x45/0x70 [ 12.285600] kasan_save_track+0x18/0x40 [ 12.285820] kasan_save_free_info+0x3f/0x60 [ 12.286103] __kasan_slab_free+0x56/0x70 [ 12.286838] slab_free_after_rcu_debug+0xe4/0x310 [ 12.287028] rcu_core+0x66f/0x1c40 [ 12.287210] rcu_core_si+0x12/0x20 [ 12.287383] handle_softirqs+0x209/0x730 [ 12.288139] __irq_exit_rcu+0xc9/0x110 [ 12.288277] irq_exit_rcu+0x12/0x20 [ 12.288411] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.288569] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.288731] [ 12.288800] Last potentially related work creation: [ 12.288955] kasan_save_stack+0x45/0x70 [ 12.289087] kasan_record_aux_stack+0xb2/0xc0 [ 12.289230] kmem_cache_free+0x131/0x420 [ 12.289585] kmem_cache_rcu_uaf+0x194/0x510 [ 12.289821] kunit_try_run_case+0x1a5/0x480 [ 12.290130] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.290619] kthread+0x337/0x6f0 [ 12.291086] ret_from_fork+0x116/0x1d0 [ 12.291250] ret_from_fork_asm+0x1a/0x30 [ 12.291577] [ 12.291742] The buggy address belongs to the object at ffff8881028d3000 [ 12.291742] which belongs to the cache test_cache of size 200 [ 12.292223] The buggy address is located 0 bytes inside of [ 12.292223] freed 200-byte region [ffff8881028d3000, ffff8881028d30c8) [ 12.292981] [ 12.293117] The buggy address belongs to the physical page: [ 12.293352] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1028d3 [ 12.293850] flags: 0x200000000000000(node=0|zone=2) [ 12.294107] page_type: f5(slab) [ 12.294234] raw: 0200000000000000 ffff888101894500 dead000000000122 0000000000000000 [ 12.294866] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.295165] page dumped because: kasan: bad access detected [ 12.295441] [ 12.295509] Memory state around the buggy address: [ 12.295889] ffff8881028d2f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.296228] ffff8881028d2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.296663] >ffff8881028d3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.297000] ^ [ 12.297136] ffff8881028d3080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.297578] ffff8881028d3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.297842] ==================================================================