Date
May 12, 2025, 6:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.355431] ================================================================== [ 19.356296] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 19.356831] Read of size 4 at addr fff00000c6549980 by task swapper/0/0 [ 19.357438] [ 19.357770] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.14.7-rc1 #1 [ 19.357964] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.358027] Hardware name: linux,dummy-virt (DT) [ 19.358121] Call trace: [ 19.358180] show_stack+0x20/0x38 (C) [ 19.358309] dump_stack_lvl+0x8c/0xd0 [ 19.358427] print_report+0x118/0x608 [ 19.358806] kasan_report+0xdc/0x128 [ 19.358938] __asan_report_load4_noabort+0x20/0x30 [ 19.359020] rcu_uaf_reclaim+0x64/0x70 [ 19.359072] rcu_core+0x9f4/0x1e20 [ 19.359129] rcu_core_si+0x18/0x30 [ 19.359176] handle_softirqs+0x374/0xb28 [ 19.359229] __do_softirq+0x1c/0x28 [ 19.359276] ____do_softirq+0x18/0x30 [ 19.359325] call_on_irq_stack+0x24/0x58 [ 19.359376] do_softirq_own_stack+0x24/0x38 [ 19.359427] __irq_exit_rcu+0x1fc/0x318 [ 19.359476] irq_exit_rcu+0x1c/0x80 [ 19.359522] el1_interrupt+0x38/0x58 [ 19.359576] el1h_64_irq_handler+0x18/0x28 [ 19.359626] el1h_64_irq+0x6c/0x70 [ 19.359781] arch_local_irq_enable+0x4/0x8 (P) [ 19.359848] do_idle+0x384/0x4e8 [ 19.359898] cpu_startup_entry+0x68/0x80 [ 19.359947] rest_init+0x160/0x188 [ 19.359996] start_kernel+0x310/0x3d8 [ 19.360053] __primary_switched+0x8c/0xa0 [ 19.360115] [ 19.369951] Allocated by task 187: [ 19.370439] kasan_save_stack+0x3c/0x68 [ 19.371317] kasan_save_track+0x20/0x40 [ 19.371869] kasan_save_alloc_info+0x40/0x58 [ 19.372414] __kasan_kmalloc+0xd4/0xd8 [ 19.372822] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.373346] rcu_uaf+0xb0/0x2d0 [ 19.373776] kunit_try_run_case+0x170/0x3f0 [ 19.374246] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.375079] kthread+0x318/0x620 [ 19.375498] ret_from_fork+0x10/0x20 [ 19.376006] [ 19.376271] Freed by task 0: [ 19.376655] kasan_save_stack+0x3c/0x68 [ 19.377130] kasan_save_track+0x20/0x40 [ 19.377654] kasan_save_free_info+0x4c/0x78 [ 19.378187] __kasan_slab_free+0x6c/0x98 [ 19.378973] kfree+0x214/0x3c8 [ 19.379600] rcu_uaf_reclaim+0x28/0x70 [ 19.380327] rcu_core+0x9f4/0x1e20 [ 19.380768] rcu_core_si+0x18/0x30 [ 19.381272] handle_softirqs+0x374/0xb28 [ 19.381696] __do_softirq+0x1c/0x28 [ 19.382226] [ 19.382613] Last potentially related work creation: [ 19.383332] kasan_save_stack+0x3c/0x68 [ 19.383856] kasan_record_aux_stack+0xb4/0xc8 [ 19.384345] __call_rcu_common.constprop.0+0x74/0xa10 [ 19.384937] call_rcu+0x18/0x30 [ 19.385353] rcu_uaf+0x14c/0x2d0 [ 19.385791] kunit_try_run_case+0x170/0x3f0 [ 19.386255] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.387115] kthread+0x318/0x620 [ 19.387569] ret_from_fork+0x10/0x20 [ 19.388038] [ 19.388392] The buggy address belongs to the object at fff00000c6549980 [ 19.388392] which belongs to the cache kmalloc-32 of size 32 [ 19.389391] The buggy address is located 0 bytes inside of [ 19.389391] freed 32-byte region [fff00000c6549980, fff00000c65499a0) [ 19.390419] [ 19.391005] The buggy address belongs to the physical page: [ 19.391313] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106549 [ 19.392192] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.392838] page_type: f5(slab) [ 19.393278] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.394091] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.394894] page dumped because: kasan: bad access detected [ 19.395627] [ 19.395916] Memory state around the buggy address: [ 19.396480] fff00000c6549880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.397079] fff00000c6549900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.397862] >fff00000c6549980: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 19.398609] ^ [ 19.399177] fff00000c6549a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.399687] fff00000c6549a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.400466] ==================================================================
[ 12.980141] ================================================================== [ 12.980720] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 12.980976] Read of size 4 at addr ffff888101b25e40 by task swapper/1/0 [ 12.981623] [ 12.981759] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.14.7-rc1 #1 [ 12.981813] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.981825] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.981862] Call Trace: [ 12.981900] <IRQ> [ 12.981922] dump_stack_lvl+0x73/0xb0 [ 12.981955] print_report+0xd1/0x650 [ 12.981978] ? __virt_addr_valid+0x1db/0x2d0 [ 12.982085] ? rcu_uaf_reclaim+0x50/0x60 [ 12.982107] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.982132] ? rcu_uaf_reclaim+0x50/0x60 [ 12.982151] kasan_report+0x140/0x180 [ 12.982172] ? rcu_uaf_reclaim+0x50/0x60 [ 12.982195] __asan_report_load4_noabort+0x18/0x20 [ 12.982218] rcu_uaf_reclaim+0x50/0x60 [ 12.982237] rcu_core+0x680/0x1d70 [ 12.982267] ? __pfx_rcu_core+0x10/0x10 [ 12.982289] ? ktime_get+0x6b/0x150 [ 12.982311] ? handle_softirqs+0x18e/0x730 [ 12.982337] rcu_core_si+0x12/0x20 [ 12.982357] handle_softirqs+0x209/0x730 [ 12.982378] ? hrtimer_interrupt+0x2fe/0x780 [ 12.982400] ? __pfx_handle_softirqs+0x10/0x10 [ 12.982426] __irq_exit_rcu+0xc9/0x110 [ 12.982447] irq_exit_rcu+0x12/0x20 [ 12.982468] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.982493] </IRQ> [ 12.982526] <TASK> [ 12.982536] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.982631] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 12.982758] Code: 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 33 b2 10 00 fb f4 <e9> cc 1c 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 [ 12.982856] RSP: 0000:ffff88810088fdd0 EFLAGS: 00010216 [ 12.982952] RAX: ffff888154b00000 RBX: ffff8881008790c0 RCX: ffffffffa437ce05 [ 12.983390] RDX: ffffed102a966ae3 RSI: 0000000000000004 RDI: 000000000000e7dc [ 12.983451] RBP: ffff88810088fdd8 R08: 0000000000000001 R09: ffffed102a966ae2 [ 12.983506] R10: ffff888154b35713 R11: 00000000000b5000 R12: 0000000000000001 [ 12.983549] R13: ffffed102010f218 R14: ffffffffa5f83210 R15: 0000000000000000 [ 12.983613] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 12.983673] ? default_idle+0xd/0x20 [ 12.983693] arch_cpu_idle+0xd/0x20 [ 12.983712] default_idle_call+0x48/0x80 [ 12.983732] do_idle+0x310/0x3c0 [ 12.983752] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.983778] ? __pfx_do_idle+0x10/0x10 [ 12.983795] ? _raw_spin_unlock_irqrestore+0x49/0x90 [ 12.983819] ? complete+0x15b/0x1d0 [ 12.983856] cpu_startup_entry+0x5c/0x70 [ 12.983877] start_secondary+0x216/0x290 [ 12.983899] ? __pfx_start_secondary+0x10/0x10 [ 12.983924] common_startup_64+0x12c/0x138 [ 12.983956] </TASK> [ 12.983968] [ 12.994344] Allocated by task 206: [ 12.994508] kasan_save_stack+0x45/0x70 [ 12.994717] kasan_save_track+0x18/0x40 [ 12.994919] kasan_save_alloc_info+0x3b/0x50 [ 12.995369] __kasan_kmalloc+0xb7/0xc0 [ 12.995515] __kmalloc_cache_noprof+0x18a/0x420 [ 12.995674] rcu_uaf+0xb1/0x330 [ 12.995851] kunit_try_run_case+0x1a6/0x480 [ 12.996179] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.996456] kthread+0x324/0x6e0 [ 12.996645] ret_from_fork+0x41/0x80 [ 12.996849] ret_from_fork_asm+0x1a/0x30 [ 12.997099] [ 12.997174] Freed by task 0: [ 12.997331] kasan_save_stack+0x45/0x70 [ 12.997527] kasan_save_track+0x18/0x40 [ 12.997723] kasan_save_free_info+0x3f/0x60 [ 12.997958] __kasan_slab_free+0x56/0x70 [ 12.998196] kfree+0x224/0x3f0 [ 12.998354] rcu_uaf_reclaim+0x1f/0x60 [ 12.998544] rcu_core+0x680/0x1d70 [ 12.998692] rcu_core_si+0x12/0x20 [ 12.998883] handle_softirqs+0x209/0x730 [ 12.999406] __irq_exit_rcu+0xc9/0x110 [ 12.999616] irq_exit_rcu+0x12/0x20 [ 12.999753] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.999942] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.000283] [ 13.000420] Last potentially related work creation: [ 13.000658] kasan_save_stack+0x45/0x70 [ 13.000817] kasan_record_aux_stack+0xb2/0xc0 [ 13.001139] __call_rcu_common.constprop.0+0x72/0xaa0 [ 13.001371] call_rcu+0x12/0x20 [ 13.001512] rcu_uaf+0x169/0x330 [ 13.001663] kunit_try_run_case+0x1a6/0x480 [ 13.001882] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.002215] kthread+0x324/0x6e0 [ 13.002381] ret_from_fork+0x41/0x80 [ 13.002542] ret_from_fork_asm+0x1a/0x30 [ 13.002727] [ 13.002833] The buggy address belongs to the object at ffff888101b25e40 [ 13.002833] which belongs to the cache kmalloc-32 of size 32 [ 13.003550] The buggy address is located 0 bytes inside of [ 13.003550] freed 32-byte region [ffff888101b25e40, ffff888101b25e60) [ 13.004135] [ 13.004240] The buggy address belongs to the physical page: [ 13.004423] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b25 [ 13.004663] flags: 0x200000000000000(node=0|zone=2) [ 13.004872] page_type: f5(slab) [ 13.005155] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.005505] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.005821] page dumped because: kasan: bad access detected [ 13.006090] [ 13.006165] Memory state around the buggy address: [ 13.006394] ffff888101b25d00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.006719] ffff888101b25d80: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 13.007338] >ffff888101b25e00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.007651] ^ [ 13.007821] ffff888101b25e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.008252] ffff888101b25f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.008575] ==================================================================