Date
July 3, 2025, 3:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.958504] ================================================================== [ 15.959877] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 15.960598] Read of size 4 at addr fff00000c65c5380 by task swapper/1/0 [ 15.961553] [ 15.961669] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.15.5-rc1 #1 PREEMPT [ 15.961755] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.961782] Hardware name: linux,dummy-virt (DT) [ 15.961814] Call trace: [ 15.962729] show_stack+0x20/0x38 (C) [ 15.963434] dump_stack_lvl+0x8c/0xd0 [ 15.963861] print_report+0x118/0x608 [ 15.964342] kasan_report+0xdc/0x128 [ 15.964812] __asan_report_load4_noabort+0x20/0x30 [ 15.965355] rcu_uaf_reclaim+0x64/0x70 [ 15.966165] rcu_core+0x9f4/0x1e20 [ 15.966580] rcu_core_si+0x18/0x30 [ 15.966653] handle_softirqs+0x374/0xb28 [ 15.966700] __do_softirq+0x1c/0x28 [ 15.966742] ____do_softirq+0x18/0x30 [ 15.966784] call_on_irq_stack+0x24/0x30 [ 15.966829] do_softirq_own_stack+0x24/0x38 [ 15.968226] __irq_exit_rcu+0x1fc/0x318 [ 15.969023] irq_exit_rcu+0x1c/0x80 [ 15.969316] el1_interrupt+0x38/0x58 [ 15.969701] el1h_64_irq_handler+0x18/0x28 [ 15.969752] el1h_64_irq+0x6c/0x70 [ 15.971315] arch_local_irq_enable+0x4/0x8 (P) [ 15.971580] do_idle+0x384/0x4e8 [ 15.972093] cpu_startup_entry+0x68/0x80 [ 15.972151] secondary_start_kernel+0x288/0x340 [ 15.972541] __secondary_switched+0xc0/0xc8 [ 15.973211] [ 15.973237] Allocated by task 201: [ 15.973892] kasan_save_stack+0x3c/0x68 [ 15.974193] kasan_save_track+0x20/0x40 [ 15.974228] kasan_save_alloc_info+0x40/0x58 [ 15.974267] __kasan_kmalloc+0xd4/0xd8 [ 15.974301] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.974855] rcu_uaf+0xb0/0x2d8 [ 15.975460] kunit_try_run_case+0x170/0x3f0 [ 15.975562] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.975608] kthread+0x328/0x630 [ 15.975644] ret_from_fork+0x10/0x20 [ 15.975682] [ 15.975702] Freed by task 0: [ 15.975728] kasan_save_stack+0x3c/0x68 [ 15.975765] kasan_save_track+0x20/0x40 [ 15.977126] kasan_save_free_info+0x4c/0x78 [ 15.977619] __kasan_slab_free+0x6c/0x98 [ 15.978210] kfree+0x214/0x3c8 [ 15.978255] rcu_uaf_reclaim+0x28/0x70 [ 15.978431] rcu_core+0x9f4/0x1e20 [ 15.978759] rcu_core_si+0x18/0x30 [ 15.979339] handle_softirqs+0x374/0xb28 [ 15.979391] __do_softirq+0x1c/0x28 [ 15.980011] [ 15.980322] Last potentially related work creation: [ 15.980367] kasan_save_stack+0x3c/0x68 [ 15.980417] kasan_record_aux_stack+0xb4/0xc8 [ 15.981775] __call_rcu_common.constprop.0+0x70/0x8b0 [ 15.981905] call_rcu+0x18/0x30 [ 15.981960] rcu_uaf+0x14c/0x2d8 [ 15.981996] kunit_try_run_case+0x170/0x3f0 [ 15.982035] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.983085] kthread+0x328/0x630 [ 15.983195] ret_from_fork+0x10/0x20 [ 15.983576] [ 15.983619] The buggy address belongs to the object at fff00000c65c5380 [ 15.983619] which belongs to the cache kmalloc-32 of size 32 [ 15.984355] The buggy address is located 0 bytes inside of [ 15.984355] freed 32-byte region [fff00000c65c5380, fff00000c65c53a0) [ 15.985071] [ 15.985251] The buggy address belongs to the physical page: [ 15.985370] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065c5 [ 15.985557] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.986198] page_type: f5(slab) [ 15.986493] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 15.987649] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 15.987884] page dumped because: kasan: bad access detected [ 15.988585] [ 15.988718] Memory state around the buggy address: [ 15.988769] fff00000c65c5280: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 15.988999] fff00000c65c5300: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 15.989202] >fff00000c65c5380: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 15.989284] ^ [ 15.989379] fff00000c65c5400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.989823] fff00000c65c5480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.989865] ==================================================================
[ 11.725501] ================================================================== [ 11.725981] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 11.726347] Read of size 4 at addr ffff888102dd04c0 by task swapper/1/0 [ 11.726636] [ 11.726816] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.15.5-rc1 #1 PREEMPT(voluntary) [ 11.726860] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.726871] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.726891] Call Trace: [ 11.726917] <IRQ> [ 11.726933] dump_stack_lvl+0x73/0xb0 [ 11.726961] print_report+0xd1/0x650 [ 11.726984] ? __virt_addr_valid+0x1db/0x2d0 [ 11.727006] ? rcu_uaf_reclaim+0x50/0x60 [ 11.727027] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.727049] ? rcu_uaf_reclaim+0x50/0x60 [ 11.727071] kasan_report+0x141/0x180 [ 11.727093] ? rcu_uaf_reclaim+0x50/0x60 [ 11.727119] __asan_report_load4_noabort+0x18/0x20 [ 11.727140] rcu_uaf_reclaim+0x50/0x60 [ 11.727161] rcu_core+0x66c/0x1c30 [ 11.727185] ? enqueue_hrtimer+0xfe/0x210 [ 11.727209] ? __pfx_rcu_core+0x10/0x10 [ 11.727231] ? ktime_get+0x6b/0x150 [ 11.727265] ? handle_softirqs+0x18e/0x730 [ 11.727291] rcu_core_si+0x12/0x20 [ 11.727308] handle_softirqs+0x209/0x730 [ 11.727329] ? hrtimer_interrupt+0x2fe/0x780 [ 11.727352] ? __pfx_handle_softirqs+0x10/0x10 [ 11.727378] __irq_exit_rcu+0xc9/0x110 [ 11.727400] irq_exit_rcu+0x12/0x20 [ 11.727417] sysvec_apic_timer_interrupt+0x81/0x90 [ 11.727442] </IRQ> [ 11.727467] <TASK> [ 11.727477] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 11.727564] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 11.727828] 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 43 ae 27 00 fb f4 <e9> fc 1f 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 [ 11.727913] RSP: 0000:ffff88810086fdc8 EFLAGS: 00010212 [ 11.728007] RAX: ffff8881c3b92000 RBX: ffff8881008353c0 RCX: ffffffff9500ef55 [ 11.728053] RDX: ffffed102b626103 RSI: 0000000000000004 RDI: 000000000001a79c [ 11.728096] RBP: ffff88810086fdd0 R08: 0000000000000001 R09: ffffed102b626102 [ 11.728147] R10: ffff88815b130813 R11: ffffffff975a3300 R12: 0000000000000001 [ 11.728192] R13: ffffed1020106a78 R14: ffffffff96d9c210 R15: 0000000000000000 [ 11.728262] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 11.728363] ? default_idle+0xd/0x20 [ 11.728384] arch_cpu_idle+0xd/0x20 [ 11.728403] default_idle_call+0x48/0x80 [ 11.728422] do_idle+0x379/0x4f0 [ 11.728443] ? complete+0x15b/0x1d0 [ 11.728463] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.728489] ? __pfx_do_idle+0x10/0x10 [ 11.728507] ? _raw_spin_unlock_irqrestore+0x49/0x90 [ 11.728532] ? complete+0x15b/0x1d0 [ 11.728555] cpu_startup_entry+0x5c/0x70 [ 11.728578] start_secondary+0x211/0x290 [ 11.728601] ? __pfx_start_secondary+0x10/0x10 [ 11.728626] common_startup_64+0x13e/0x148 [ 11.728672] </TASK> [ 11.728684] [ 11.741546] Allocated by task 217: [ 11.741808] kasan_save_stack+0x45/0x70 [ 11.742006] kasan_save_track+0x18/0x40 [ 11.742190] kasan_save_alloc_info+0x3b/0x50 [ 11.742452] __kasan_kmalloc+0xb7/0xc0 [ 11.742619] __kmalloc_cache_noprof+0x189/0x420 [ 11.742899] rcu_uaf+0xb0/0x330 [ 11.743073] kunit_try_run_case+0x1a5/0x480 [ 11.743223] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.743491] kthread+0x337/0x6f0 [ 11.743655] ret_from_fork+0x41/0x80 [ 11.743881] ret_from_fork_asm+0x1a/0x30 [ 11.744024] [ 11.744094] Freed by task 0: [ 11.744201] kasan_save_stack+0x45/0x70 [ 11.744363] kasan_save_track+0x18/0x40 [ 11.744560] kasan_save_free_info+0x3f/0x60 [ 11.744823] __kasan_slab_free+0x56/0x70 [ 11.745025] kfree+0x222/0x3f0 [ 11.745190] rcu_uaf_reclaim+0x1f/0x60 [ 11.745614] rcu_core+0x66c/0x1c30 [ 11.745910] rcu_core_si+0x12/0x20 [ 11.746884] handle_softirqs+0x209/0x730 [ 11.747186] __irq_exit_rcu+0xc9/0x110 [ 11.747522] irq_exit_rcu+0x12/0x20 [ 11.747872] sysvec_apic_timer_interrupt+0x81/0x90 [ 11.748116] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 11.748520] [ 11.748644] Last potentially related work creation: [ 11.749062] kasan_save_stack+0x45/0x70 [ 11.749357] kasan_record_aux_stack+0xb2/0xc0 [ 11.749584] __call_rcu_common.constprop.0+0x72/0x9c0 [ 11.750111] call_rcu+0x12/0x20 [ 11.750258] rcu_uaf+0x168/0x330 [ 11.750626] kunit_try_run_case+0x1a5/0x480 [ 11.750961] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.751209] kthread+0x337/0x6f0 [ 11.751575] ret_from_fork+0x41/0x80 [ 11.751791] ret_from_fork_asm+0x1a/0x30 [ 11.752125] [ 11.752257] The buggy address belongs to the object at ffff888102dd04c0 [ 11.752257] which belongs to the cache kmalloc-32 of size 32 [ 11.753085] The buggy address is located 0 bytes inside of [ 11.753085] freed 32-byte region [ffff888102dd04c0, ffff888102dd04e0) [ 11.753779] [ 11.753927] The buggy address belongs to the physical page: [ 11.754187] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102dd0 [ 11.754952] flags: 0x200000000000000(node=0|zone=2) [ 11.755186] page_type: f5(slab) [ 11.755406] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 11.755749] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 11.756064] page dumped because: kasan: bad access detected [ 11.756347] [ 11.756568] Memory state around the buggy address: [ 11.756787] ffff888102dd0380: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 11.757148] ffff888102dd0400: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 11.757654] >ffff888102dd0480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 11.758188] ^ [ 11.758653] ffff888102dd0500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.758936] ffff888102dd0580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.759247] ==================================================================