Date
Nov. 28, 2024, 2:36 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.894024] ================================================================== [ 31.894936] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 31.895771] Read of size 1 at addr fff00000c4074000 by task kunit_try_catch/201 [ 31.896421] [ 31.896790] CPU: 1 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241128 #1 [ 31.897704] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.898457] Hardware name: linux,dummy-virt (DT) [ 31.899037] Call trace: [ 31.899464] show_stack+0x20/0x38 (C) [ 31.899935] dump_stack_lvl+0x8c/0xd0 [ 31.900531] print_report+0x118/0x5e0 [ 31.901161] kasan_report+0xc8/0x118 [ 31.902169] __asan_report_load1_noabort+0x20/0x30 [ 31.902847] kmem_cache_rcu_uaf+0x390/0x468 [ 31.903384] kunit_try_run_case+0x14c/0x3d0 [ 31.903983] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.904663] kthread+0x24c/0x2d0 [ 31.905289] ret_from_fork+0x10/0x20 [ 31.905877] [ 31.906192] Allocated by task 201: [ 31.906684] kasan_save_stack+0x3c/0x68 [ 31.907235] kasan_save_track+0x20/0x40 [ 31.907816] kasan_save_alloc_info+0x40/0x58 [ 31.908428] __kasan_slab_alloc+0xa8/0xb0 [ 31.909047] kmem_cache_alloc_noprof+0x108/0x398 [ 31.909743] kmem_cache_rcu_uaf+0x12c/0x468 [ 31.910437] kunit_try_run_case+0x14c/0x3d0 [ 31.910993] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.911646] kthread+0x24c/0x2d0 [ 31.912199] ret_from_fork+0x10/0x20 [ 31.912692] [ 31.913328] Freed by task 0: [ 31.913778] kasan_save_stack+0x3c/0x68 [ 31.914344] kasan_save_track+0x20/0x40 [ 31.914813] kasan_save_free_info+0x4c/0x78 [ 31.915446] __kasan_slab_free+0x6c/0x98 [ 31.915982] slab_free_after_rcu_debug+0xd4/0x2f8 [ 31.916577] rcu_core+0x9f4/0x1e20 [ 31.917735] rcu_core_si+0x18/0x30 [ 31.918269] handle_softirqs+0x374/0xb20 [ 31.918793] __do_softirq+0x1c/0x28 [ 31.919251] [ 31.919601] Last potentially related work creation: [ 31.920228] kasan_save_stack+0x3c/0x68 [ 31.920822] __kasan_record_aux_stack+0xbc/0xe8 [ 31.921647] kasan_record_aux_stack_noalloc+0x14/0x20 [ 31.922247] kmem_cache_free+0x28c/0x470 [ 31.922830] kmem_cache_rcu_uaf+0x16c/0x468 [ 31.923483] kunit_try_run_case+0x14c/0x3d0 [ 31.924104] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.924774] kthread+0x24c/0x2d0 [ 31.925596] ret_from_fork+0x10/0x20 [ 31.926125] [ 31.926474] The buggy address belongs to the object at fff00000c4074000 [ 31.926474] which belongs to the cache test_cache of size 200 [ 31.927543] The buggy address is located 0 bytes inside of [ 31.927543] freed 200-byte region [fff00000c4074000, fff00000c40740c8) [ 31.928696] [ 31.929352] The buggy address belongs to the physical page: [ 31.929997] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104074 [ 31.930940] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.931670] page_type: f5(slab) [ 31.932232] raw: 0bfffe0000000000 fff00000c5b7b3c0 dead000000000122 0000000000000000 [ 31.933441] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 31.934148] page dumped because: kasan: bad access detected [ 31.934832] [ 31.935159] Memory state around the buggy address: [ 31.935778] fff00000c4073f00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.936533] fff00000c4073f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.937350] >fff00000c4074000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.938488] ^ [ 31.938859] fff00000c4074080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.939699] fff00000c4074100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.940400] ==================================================================
[ 22.797590] ================================================================== [ 22.798564] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 22.799659] Read of size 1 at addr ffff888102a27000 by task kunit_try_catch/221 [ 22.801314] [ 22.801579] CPU: 0 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241128 #1 [ 22.802524] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.802953] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.803749] Call Trace: [ 22.804205] <TASK> [ 22.804576] dump_stack_lvl+0x73/0xb0 [ 22.805357] print_report+0xd1/0x640 [ 22.806003] ? __virt_addr_valid+0x1db/0x2d0 [ 22.806775] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.807440] kasan_report+0x102/0x140 [ 22.807819] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 22.808571] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 22.809053] __asan_report_load1_noabort+0x18/0x20 [ 22.809911] kmem_cache_rcu_uaf+0x3e5/0x510 [ 22.810370] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 22.810912] ? finish_task_switch.isra.0+0x153/0x700 [ 22.811433] ? __switch_to+0x5d9/0xf60 [ 22.811947] ? __pfx_read_tsc+0x10/0x10 [ 22.812626] ? ktime_get_ts64+0x84/0x230 [ 22.813049] kunit_try_run_case+0x1b3/0x490 [ 22.813855] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.814502] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 22.815229] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.816183] ? __kthread_parkme+0x82/0x160 [ 22.816899] ? preempt_count_sub+0x50/0x80 [ 22.817458] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.818402] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.818992] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.819832] kthread+0x257/0x310 [ 22.820189] ? __pfx_kthread+0x10/0x10 [ 22.820541] ret_from_fork+0x41/0x80 [ 22.820894] ? __pfx_kthread+0x10/0x10 [ 22.821219] ret_from_fork_asm+0x1a/0x30 [ 22.821760] </TASK> [ 22.822061] [ 22.822281] Allocated by task 221: [ 22.822679] kasan_save_stack+0x3d/0x60 [ 22.823215] kasan_save_track+0x18/0x40 [ 22.823518] kasan_save_alloc_info+0x3b/0x50 [ 22.824008] __kasan_slab_alloc+0x91/0xa0 [ 22.824387] kmem_cache_alloc_noprof+0x11e/0x3e0 [ 22.824893] kmem_cache_rcu_uaf+0x156/0x510 [ 22.825413] kunit_try_run_case+0x1b3/0x490 [ 22.825720] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.826261] kthread+0x257/0x310 [ 22.826706] ret_from_fork+0x41/0x80 [ 22.827201] ret_from_fork_asm+0x1a/0x30 [ 22.827697] [ 22.827890] Freed by task 0: [ 22.828150] kasan_save_stack+0x3d/0x60 [ 22.828525] kasan_save_track+0x18/0x40 [ 22.828982] kasan_save_free_info+0x3f/0x60 [ 22.829555] __kasan_slab_free+0x56/0x70 [ 22.829933] slab_free_after_rcu_debug+0xe4/0x310 [ 22.830262] rcu_core+0x680/0x1d70 [ 22.830687] rcu_core_si+0x12/0x20 [ 22.831117] handle_softirqs+0x209/0x720 [ 22.831653] __irq_exit_rcu+0xc9/0x110 [ 22.832006] irq_exit_rcu+0x12/0x20 [ 22.832316] sysvec_apic_timer_interrupt+0x81/0x90 [ 22.832869] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 22.833493] [ 22.833659] Last potentially related work creation: [ 22.834241] kasan_save_stack+0x3d/0x60 [ 22.834652] __kasan_record_aux_stack+0xae/0xc0 [ 22.835166] kasan_record_aux_stack_noalloc+0xf/0x20 [ 22.835688] kmem_cache_free+0x284/0x420 [ 22.835962] kmem_cache_rcu_uaf+0x195/0x510 [ 22.836314] kunit_try_run_case+0x1b3/0x490 [ 22.836812] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.837518] kthread+0x257/0x310 [ 22.837939] ret_from_fork+0x41/0x80 [ 22.838323] ret_from_fork_asm+0x1a/0x30 [ 22.838624] [ 22.838774] The buggy address belongs to the object at ffff888102a27000 [ 22.838774] which belongs to the cache test_cache of size 200 [ 22.839936] The buggy address is located 0 bytes inside of [ 22.839936] freed 200-byte region [ffff888102a27000, ffff888102a270c8) [ 22.841174] [ 22.841389] The buggy address belongs to the physical page: [ 22.841736] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a27 [ 22.842665] flags: 0x200000000000000(node=0|zone=2) [ 22.843204] page_type: f5(slab) [ 22.843473] raw: 0200000000000000 ffff888101653c80 dead000000000122 0000000000000000 [ 22.844272] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 22.844995] page dumped because: kasan: bad access detected [ 22.845605] [ 22.845781] Memory state around the buggy address: [ 22.846276] ffff888102a26f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.846966] ffff888102a26f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.847505] >ffff888102a27000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.847983] ^ [ 22.848456] ffff888102a27080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 22.849060] ffff888102a27100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.849788] ==================================================================