Date
Nov. 27, 2024, 3:37 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 48.789753] ================================================================== [ 48.791213] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 48.791929] Read of size 4 at addr fff00000c615dc80 by task swapper/1/0 [ 48.792669] [ 48.792991] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.12.0-next-20241127 #1 [ 48.794855] Tainted: [B]=BAD_PAGE, [N]=TEST [ 48.795473] Hardware name: linux,dummy-virt (DT) [ 48.796008] Call trace: [ 48.796425] show_stack+0x20/0x38 (C) [ 48.796953] dump_stack_lvl+0x8c/0xd0 [ 48.797995] print_report+0x118/0x5e0 [ 48.798704] kasan_report+0xc8/0x118 [ 48.799417] __asan_report_load4_noabort+0x20/0x30 [ 48.800033] rcu_uaf_reclaim+0x64/0x70 [ 48.800616] rcu_core+0x9f4/0x1e20 [ 48.801334] rcu_core_si+0x18/0x30 [ 48.801839] handle_softirqs+0x374/0xb20 [ 48.802477] __do_softirq+0x1c/0x28 [ 48.803051] ____do_softirq+0x18/0x30 [ 48.803569] call_on_irq_stack+0x24/0x58 [ 48.804232] do_softirq_own_stack+0x24/0x38 [ 48.805364] __irq_exit_rcu+0x1fc/0x318 [ 48.805769] irq_exit_rcu+0x1c/0x80 [ 48.806148] el1_interrupt+0x38/0x58 [ 48.806563] el1h_64_irq_handler+0x18/0x28 [ 48.806974] el1h_64_irq+0x6c/0x70 [ 48.808911] arch_local_irq_enable+0x4/0x8 (P) [ 48.809875] default_idle_call+0x6c/0x78 (L) [ 48.811392] do_idle+0x384/0x4e8 [ 48.812109] cpu_startup_entry+0x64/0x80 [ 48.812873] secondary_start_kernel+0x288/0x340 [ 48.813649] __secondary_switched+0xc0/0xc8 [ 48.814382] [ 48.814880] Allocated by task 187: [ 48.815731] kasan_save_stack+0x3c/0x68 [ 48.816285] kasan_save_track+0x20/0x40 [ 48.816990] kasan_save_alloc_info+0x40/0x58 [ 48.817780] __kasan_kmalloc+0xd4/0xd8 [ 48.818428] __kmalloc_cache_noprof+0x15c/0x3c0 [ 48.819273] rcu_uaf+0xb0/0x2d0 [ 48.819967] kunit_try_run_case+0x14c/0x3d0 [ 48.820825] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 48.821859] kthread+0x24c/0x2d0 [ 48.822537] ret_from_fork+0x10/0x20 [ 48.823194] [ 48.823545] Freed by task 0: [ 48.823967] kasan_save_stack+0x3c/0x68 [ 48.824561] kasan_save_track+0x20/0x40 [ 48.825526] kasan_save_free_info+0x4c/0x78 [ 48.826159] __kasan_slab_free+0x6c/0x98 [ 48.826877] kfree+0x114/0x3c8 [ 48.827511] rcu_uaf_reclaim+0x28/0x70 [ 48.828166] rcu_core+0x9f4/0x1e20 [ 48.828817] rcu_core_si+0x18/0x30 [ 48.829664] handle_softirqs+0x374/0xb20 [ 48.830508] __do_softirq+0x1c/0x28 [ 48.831015] [ 48.831348] Last potentially related work creation: [ 48.832180] kasan_save_stack+0x3c/0x68 [ 48.832975] __kasan_record_aux_stack+0xbc/0xe8 [ 48.833975] kasan_record_aux_stack_noalloc+0x14/0x20 [ 48.834838] __call_rcu_common.constprop.0+0x74/0xa10 [ 48.835695] call_rcu+0x18/0x30 [ 48.836178] rcu_uaf+0x14c/0x2d0 [ 48.836908] kunit_try_run_case+0x14c/0x3d0 [ 48.837780] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 48.838476] kthread+0x24c/0x2d0 [ 48.838985] ret_from_fork+0x10/0x20 [ 48.839580] [ 48.839896] The buggy address belongs to the object at fff00000c615dc80 [ 48.839896] which belongs to the cache kmalloc-32 of size 32 [ 48.841664] The buggy address is located 0 bytes inside of [ 48.841664] freed 32-byte region [fff00000c615dc80, fff00000c615dca0) [ 48.843202] [ 48.843497] The buggy address belongs to the physical page: [ 48.844216] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10615d [ 48.845174] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 48.845970] page_type: f5(slab) [ 48.846569] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 48.847803] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 48.848684] page dumped because: kasan: bad access detected [ 48.849662] [ 48.849953] Memory state around the buggy address: [ 48.850634] fff00000c615db80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 48.851517] fff00000c615dc00: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 48.852453] >fff00000c615dc80: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 48.853216] ^ [ 48.854419] fff00000c615dd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.855595] fff00000c615dd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.856405] ==================================================================
[ 26.047359] ================================================================== [ 26.049063] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 26.049612] Read of size 4 at addr ffff888102a4c040 by task swapper/0/0 [ 26.050507] [ 26.051108] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.12.0-next-20241127 #1 [ 26.052065] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.052543] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.053257] Call Trace: [ 26.053546] <IRQ> [ 26.053892] dump_stack_lvl+0x73/0xb0 [ 26.054351] print_report+0xd1/0x640 [ 26.054718] ? __virt_addr_valid+0x1db/0x2d0 [ 26.055541] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.056147] kasan_report+0x102/0x140 [ 26.056643] ? rcu_uaf_reclaim+0x50/0x60 [ 26.057388] ? rcu_uaf_reclaim+0x50/0x60 [ 26.057839] __asan_report_load4_noabort+0x18/0x20 [ 26.058218] rcu_uaf_reclaim+0x50/0x60 [ 26.058888] rcu_core+0x680/0x1d70 [ 26.059435] ? __pfx_rcu_core+0x10/0x10 [ 26.059627] ? ktime_get+0x69/0x150 [ 26.059801] ? handle_softirqs+0x18e/0x720 [ 26.060035] rcu_core_si+0x12/0x20 [ 26.060298] handle_softirqs+0x209/0x720 [ 26.060720] ? hrtimer_interrupt+0x2fe/0x780 [ 26.061115] ? __pfx_handle_softirqs+0x10/0x10 [ 26.061781] __irq_exit_rcu+0xc9/0x110 [ 26.062418] irq_exit_rcu+0x12/0x20 [ 26.062974] sysvec_apic_timer_interrupt+0x81/0x90 [ 26.063552] </IRQ> [ 26.063798] <TASK> [ 26.064073] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 26.064777] RIP: 0010:default_idle+0xf/0x20 [ 26.065489] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 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 f3 f5 34 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 [ 26.067060] RSP: 0000:ffffffffbac07df0 EFLAGS: 00010202 [ 26.067700] RAX: ffff88815b000000 RBX: ffffffffbac1a680 RCX: ffffffffb990b345 [ 26.068406] RDX: ffffed102b606b23 RSI: 0000000000000004 RDI: 000000000003c3d4 [ 26.069093] RBP: ffffffffbac07df8 R08: 0000000000000001 R09: ffffed102b606b22 [ 26.069714] R10: ffff88815b035913 R11: 0000000000000000 R12: 0000000000000000 [ 26.070402] R13: fffffbfff75834d0 R14: ffffffffbb772bd0 R15: 0000000000000000 [ 26.071224] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 26.071706] ? arch_cpu_idle+0xd/0x20 [ 26.072088] default_idle_call+0x48/0x80 [ 26.072547] do_idle+0x310/0x3c0 [ 26.072972] ? __pfx_do_idle+0x10/0x10 [ 26.073388] ? schedule+0x75/0x310 [ 26.073697] ? trace_preempt_on+0x20/0xc0 [ 26.074207] ? schedule+0x86/0x310 [ 26.074586] ? preempt_count_sub+0x50/0x80 [ 26.075107] cpu_startup_entry+0x5c/0x70 [ 26.075472] rest_init+0x11a/0x140 [ 26.075890] ? acpi_subsystem_init+0x5d/0x150 [ 26.076379] start_kernel+0x320/0x400 [ 26.076696] x86_64_start_reservations+0x1c/0x30 [ 26.077326] x86_64_start_kernel+0xcf/0xe0 [ 26.077802] common_startup_64+0x12c/0x138 [ 26.078231] </TASK> [ 26.078559] [ 26.078793] Allocated by task 206: [ 26.079163] kasan_save_stack+0x3d/0x60 [ 26.079443] kasan_save_track+0x18/0x40 [ 26.079910] kasan_save_alloc_info+0x3b/0x50 [ 26.080493] __kasan_kmalloc+0xb7/0xc0 [ 26.080807] __kmalloc_cache_noprof+0x184/0x410 [ 26.081389] rcu_uaf+0xb1/0x330 [ 26.081738] kunit_try_run_case+0x1b3/0x490 [ 26.082268] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.082703] kthread+0x257/0x310 [ 26.083054] ret_from_fork+0x41/0x80 [ 26.083496] ret_from_fork_asm+0x1a/0x30 [ 26.083836] [ 26.084007] Freed by task 0: [ 26.084371] kasan_save_stack+0x3d/0x60 [ 26.084802] kasan_save_track+0x18/0x40 [ 26.085250] kasan_save_free_info+0x3f/0x60 [ 26.085546] __kasan_slab_free+0x56/0x70 [ 26.085851] kfree+0x123/0x3f0 [ 26.086328] rcu_uaf_reclaim+0x1f/0x60 [ 26.086809] rcu_core+0x680/0x1d70 [ 26.087220] rcu_core_si+0x12/0x20 [ 26.087477] handle_softirqs+0x209/0x720 [ 26.087915] __irq_exit_rcu+0xc9/0x110 [ 26.088412] irq_exit_rcu+0x12/0x20 [ 26.088832] sysvec_apic_timer_interrupt+0x81/0x90 [ 26.090577] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 26.091622] [ 26.091869] Last potentially related work creation: [ 26.092718] kasan_save_stack+0x3d/0x60 [ 26.093375] __kasan_record_aux_stack+0xae/0xc0 [ 26.094037] kasan_record_aux_stack_noalloc+0xf/0x20 [ 26.094614] __call_rcu_common.constprop.0+0x72/0xaa0 [ 26.095482] call_rcu+0x12/0x20 [ 26.095798] rcu_uaf+0x169/0x330 [ 26.096355] kunit_try_run_case+0x1b3/0x490 [ 26.096864] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.097738] kthread+0x257/0x310 [ 26.098407] ret_from_fork+0x41/0x80 [ 26.098922] ret_from_fork_asm+0x1a/0x30 [ 26.099813] [ 26.100105] The buggy address belongs to the object at ffff888102a4c040 [ 26.100105] which belongs to the cache kmalloc-32 of size 32 [ 26.101324] The buggy address is located 0 bytes inside of [ 26.101324] freed 32-byte region [ffff888102a4c040, ffff888102a4c060) [ 26.102897] [ 26.103149] The buggy address belongs to the physical page: [ 26.103455] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a4c [ 26.104364] flags: 0x200000000000000(node=0|zone=2) [ 26.104791] page_type: f5(slab) [ 26.105587] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 26.106413] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 26.107252] page dumped because: kasan: bad access detected [ 26.107790] [ 26.108061] Memory state around the buggy address: [ 26.108933] ffff888102a4bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.109757] ffff888102a4bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.110613] >ffff888102a4c000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 26.111478] ^ [ 26.112088] ffff888102a4c080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.112804] ffff888102a4c100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.113842] ==================================================================