Date
Nov. 20, 2024, 6:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 37.605903] ================================================================== [ 37.607096] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 37.607928] Read of size 4 at addr fff00000c65b0200 by task swapper/1/0 [ 37.608524] [ 37.608829] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.12.0-next-20241120 #1 [ 37.610342] Tainted: [B]=BAD_PAGE, [N]=TEST [ 37.611125] Hardware name: linux,dummy-virt (DT) [ 37.611840] Call trace: [ 37.612277] show_stack+0x20/0x38 (C) [ 37.612773] dump_stack_lvl+0x8c/0xd0 [ 37.613738] print_report+0x118/0x5e0 [ 37.614431] kasan_report+0xc8/0x118 [ 37.614945] __asan_report_load4_noabort+0x20/0x30 [ 37.615636] rcu_uaf_reclaim+0x64/0x70 [ 37.616138] rcu_core+0xa54/0x1df8 [ 37.616686] rcu_core_si+0x18/0x30 [ 37.617251] handle_softirqs+0x374/0xb20 [ 37.618320] __do_softirq+0x1c/0x28 [ 37.618780] ____do_softirq+0x18/0x30 [ 37.619343] call_on_irq_stack+0x24/0x58 [ 37.619909] do_softirq_own_stack+0x24/0x38 [ 37.620547] __irq_exit_rcu+0x1fc/0x318 [ 37.621135] irq_exit_rcu+0x1c/0x80 [ 37.622111] el1_interrupt+0x38/0x58 [ 37.622610] el1h_64_irq_handler+0x18/0x28 [ 37.623178] el1h_64_irq+0x6c/0x70 [ 37.623819] arch_local_irq_enable+0x4/0x8 (P) [ 37.624534] default_idle_call+0x6c/0x78 (L) [ 37.625127] do_idle+0x384/0x4e8 [ 37.626113] cpu_startup_entry+0x68/0x80 [ 37.626722] secondary_start_kernel+0x288/0x340 [ 37.627320] __secondary_switched+0xc0/0xc8 [ 37.627962] [ 37.628308] Allocated by task 187: [ 37.628825] kasan_save_stack+0x3c/0x68 [ 37.629362] kasan_save_track+0x20/0x40 [ 37.630478] kasan_save_alloc_info+0x40/0x58 [ 37.631035] __kasan_kmalloc+0xd4/0xd8 [ 37.631619] __kmalloc_cache_noprof+0x15c/0x3c8 [ 37.632177] rcu_uaf+0xb0/0x2d0 [ 37.632700] kunit_try_run_case+0x14c/0x3d0 [ 37.633394] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 37.634426] kthread+0x24c/0x2d0 [ 37.635140] ret_from_fork+0x10/0x20 [ 37.635767] [ 37.636259] Freed by task 0: [ 37.636775] kasan_save_stack+0x3c/0x68 [ 37.637428] kasan_save_track+0x20/0x40 [ 37.638245] kasan_save_free_info+0x4c/0x78 [ 37.639041] __kasan_slab_free+0x6c/0x98 [ 37.639753] kfree+0x114/0x3d0 [ 37.640327] rcu_uaf_reclaim+0x28/0x70 [ 37.640808] rcu_core+0xa54/0x1df8 [ 37.641231] rcu_core_si+0x18/0x30 [ 37.642299] handle_softirqs+0x374/0xb20 [ 37.642895] __do_softirq+0x1c/0x28 [ 37.643519] [ 37.643966] Last potentially related work creation: [ 37.644721] kasan_save_stack+0x3c/0x68 [ 37.645472] __kasan_record_aux_stack+0xbc/0xe8 [ 37.646482] kasan_record_aux_stack_noalloc+0x14/0x20 [ 37.647009] __call_rcu_common.constprop.0+0x74/0xa18 [ 37.647821] call_rcu+0x18/0x30 [ 37.648484] rcu_uaf+0x14c/0x2d0 [ 37.648910] kunit_try_run_case+0x14c/0x3d0 [ 37.650035] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 37.650969] kthread+0x24c/0x2d0 [ 37.651373] ret_from_fork+0x10/0x20 [ 37.651859] [ 37.652190] The buggy address belongs to the object at fff00000c65b0200 [ 37.652190] which belongs to the cache kmalloc-32 of size 32 [ 37.653171] The buggy address is located 0 bytes inside of [ 37.653171] freed 32-byte region [fff00000c65b0200, fff00000c65b0220) [ 37.655206] [ 37.655626] The buggy address belongs to the physical page: [ 37.656421] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065b0 [ 37.657648] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 37.658660] page_type: f5(slab) [ 37.659182] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 37.660003] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 37.660907] page dumped because: kasan: bad access detected [ 37.661424] [ 37.661785] Memory state around the buggy address: [ 37.662434] fff00000c65b0100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 37.663836] fff00000c65b0180: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 37.664660] >fff00000c65b0200: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 37.665839] ^ [ 37.666251] fff00000c65b0280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.666945] fff00000c65b0300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.667712] ==================================================================
[ 29.185297] ================================================================== [ 29.186749] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 29.187776] Read of size 4 at addr ffff8881029e5540 by task swapper/1/0 [ 29.188432] [ 29.188660] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.12.0-next-20241120 #1 [ 29.189444] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.190200] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 29.191642] Call Trace: [ 29.191955] <IRQ> [ 29.192316] dump_stack_lvl+0x73/0xb0 [ 29.192733] print_report+0xd1/0x640 [ 29.193317] ? __virt_addr_valid+0x1db/0x2d0 [ 29.193774] ? kasan_complete_mode_report_info+0x64/0x200 [ 29.194499] kasan_report+0x102/0x140 [ 29.194942] ? rcu_uaf_reclaim+0x50/0x60 [ 29.195473] ? rcu_uaf_reclaim+0x50/0x60 [ 29.195945] __asan_report_load4_noabort+0x18/0x20 [ 29.196609] rcu_uaf_reclaim+0x50/0x60 [ 29.197056] rcu_core+0x680/0x1d70 [ 29.197557] ? __pfx_rcu_core+0x10/0x10 [ 29.198033] ? ktime_get+0x69/0x150 [ 29.198513] ? handle_softirqs+0x18e/0x720 [ 29.198998] rcu_core_si+0x12/0x20 [ 29.199453] handle_softirqs+0x209/0x720 [ 29.199889] ? hrtimer_interrupt+0x2fe/0x780 [ 29.200534] ? __pfx_handle_softirqs+0x10/0x10 [ 29.200928] __irq_exit_rcu+0xc9/0x110 [ 29.201415] irq_exit_rcu+0x12/0x20 [ 29.202034] sysvec_apic_timer_interrupt+0x81/0x90 [ 29.202774] </IRQ> [ 29.202955] <TASK> [ 29.203304] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 29.204065] RIP: 0010:default_idle+0xf/0x20 [ 29.204822] 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 13 f0 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 [ 29.207374] RSP: 0000:ffff888100877de0 EFLAGS: 00010216 [ 29.208447] RAX: ffff88815b100000 RBX: ffff888100845000 RCX: ffffffff98f0b925 [ 29.209162] RDX: ffffed102b626b23 RSI: 0000000000000004 RDI: 000000000002ccac [ 29.209811] RBP: ffff888100877de8 R08: 0000000000000001 R09: ffffed102b626b22 [ 29.210450] R10: ffff88815b135913 R11: 0000000000000000 R12: 0000000000000001 [ 29.211426] R13: ffffed1020108a00 R14: ffffffff9ad72650 R15: 0000000000000000 [ 29.212122] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 29.212599] ? arch_cpu_idle+0xd/0x20 [ 29.213342] default_idle_call+0x48/0x80 [ 29.213540] do_idle+0x310/0x3c0 [ 29.213822] ? __pfx_do_idle+0x10/0x10 [ 29.214959] ? _raw_spin_unlock_irqrestore+0x49/0x90 [ 29.215751] ? complete+0x15b/0x1d0 [ 29.216788] cpu_startup_entry+0x5c/0x70 [ 29.217246] start_secondary+0x216/0x290 [ 29.217656] ? __pfx_start_secondary+0x10/0x10 [ 29.218297] common_startup_64+0x12c/0x138 [ 29.219370] </TASK> [ 29.219561] [ 29.219728] Allocated by task 205: [ 29.220361] kasan_save_stack+0x3d/0x60 [ 29.221023] kasan_save_track+0x18/0x40 [ 29.221949] kasan_save_alloc_info+0x3b/0x50 [ 29.222267] __kasan_kmalloc+0xb7/0xc0 [ 29.222780] __kmalloc_cache_noprof+0x184/0x410 [ 29.223841] rcu_uaf+0xb1/0x330 [ 29.224179] kunit_try_run_case+0x1b3/0x490 [ 29.224593] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.225122] kthread+0x257/0x310 [ 29.225428] ret_from_fork+0x41/0x80 [ 29.226381] ret_from_fork_asm+0x1a/0x30 [ 29.226648] [ 29.226904] Freed by task 0: [ 29.227636] kasan_save_stack+0x3d/0x60 [ 29.228525] kasan_save_track+0x18/0x40 [ 29.229546] kasan_save_free_info+0x3f/0x60 [ 29.230143] __kasan_slab_free+0x56/0x70 [ 29.230955] kfree+0x123/0x3f0 [ 29.231338] rcu_uaf_reclaim+0x1f/0x60 [ 29.231782] rcu_core+0x680/0x1d70 [ 29.233210] rcu_core_si+0x12/0x20 [ 29.233535] handle_softirqs+0x209/0x720 [ 29.234528] __irq_exit_rcu+0xc9/0x110 [ 29.235088] irq_exit_rcu+0x12/0x20 [ 29.235608] sysvec_apic_timer_interrupt+0x81/0x90 [ 29.236102] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 29.237118] [ 29.237450] Last potentially related work creation: [ 29.237907] kasan_save_stack+0x3d/0x60 [ 29.238719] __kasan_record_aux_stack+0xae/0xc0 [ 29.239107] kasan_record_aux_stack_noalloc+0xf/0x20 [ 29.239896] __call_rcu_common.constprop.0+0x72/0xaa0 [ 29.240237] call_rcu+0x12/0x20 [ 29.240607] rcu_uaf+0x169/0x330 [ 29.241460] kunit_try_run_case+0x1b3/0x490 [ 29.242048] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.242993] kthread+0x257/0x310 [ 29.243389] ret_from_fork+0x41/0x80 [ 29.244077] ret_from_fork_asm+0x1a/0x30 [ 29.244568] [ 29.244900] The buggy address belongs to the object at ffff8881029e5540 [ 29.244900] which belongs to the cache kmalloc-32 of size 32 [ 29.246768] The buggy address is located 0 bytes inside of [ 29.246768] freed 32-byte region [ffff8881029e5540, ffff8881029e5560) [ 29.248344] [ 29.248568] The buggy address belongs to the physical page: [ 29.249571] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029e5 [ 29.251329] flags: 0x200000000000000(node=0|zone=2) [ 29.251930] page_type: f5(slab) [ 29.252154] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 29.253271] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 29.254095] page dumped because: kasan: bad access detected [ 29.255090] [ 29.255477] Memory state around the buggy address: [ 29.256229] ffff8881029e5400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.257437] ffff8881029e5480: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 29.258952] >ffff8881029e5500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.260484] ^ [ 29.261014] ffff8881029e5580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.261887] ffff8881029e5600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.262907] ==================================================================