Date
Dec. 5, 2024, 2:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.472502] ================================================================== [ 31.473737] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 31.474521] Read of size 1 at addr fff00000c638b000 by task kunit_try_catch/202 [ 31.475578] [ 31.476106] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241205 #1 [ 31.477554] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.478099] Hardware name: linux,dummy-virt (DT) [ 31.478820] Call trace: [ 31.479455] show_stack+0x20/0x38 (C) [ 31.480182] dump_stack_lvl+0x8c/0xd0 [ 31.480775] print_report+0x118/0x5e0 [ 31.481472] kasan_report+0xc8/0x118 [ 31.482135] __asan_report_load1_noabort+0x20/0x30 [ 31.482918] kmem_cache_rcu_uaf+0x390/0x468 [ 31.483715] kunit_try_run_case+0x14c/0x3d0 [ 31.484537] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.485550] kthread+0x24c/0x2d0 [ 31.486187] ret_from_fork+0x10/0x20 [ 31.486928] [ 31.487449] Allocated by task 202: [ 31.488085] kasan_save_stack+0x3c/0x68 [ 31.488655] kasan_save_track+0x20/0x40 [ 31.489305] kasan_save_alloc_info+0x40/0x58 [ 31.489859] __kasan_slab_alloc+0xa8/0xb0 [ 31.490575] kmem_cache_alloc_noprof+0x108/0x398 [ 31.491452] kmem_cache_rcu_uaf+0x12c/0x468 [ 31.492023] kunit_try_run_case+0x14c/0x3d0 [ 31.492619] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.493600] kthread+0x24c/0x2d0 [ 31.494217] ret_from_fork+0x10/0x20 [ 31.494776] [ 31.495162] Freed by task 0: [ 31.495770] kasan_save_stack+0x3c/0x68 [ 31.496616] kasan_save_track+0x20/0x40 [ 31.497131] kasan_save_free_info+0x4c/0x78 [ 31.497713] __kasan_slab_free+0x6c/0x98 [ 31.498192] slab_free_after_rcu_debug+0xd4/0x2f8 [ 31.498950] rcu_core+0x9f4/0x1e20 [ 31.499745] rcu_core_si+0x18/0x30 [ 31.500631] handle_softirqs+0x374/0xb20 [ 31.501383] __do_softirq+0x1c/0x28 [ 31.502094] [ 31.502558] Last potentially related work creation: [ 31.503347] kasan_save_stack+0x3c/0x68 [ 31.503944] kasan_record_aux_stack+0xb4/0xc8 [ 31.504701] kmem_cache_free+0x28c/0x470 [ 31.505283] kmem_cache_rcu_uaf+0x16c/0x468 [ 31.506142] kunit_try_run_case+0x14c/0x3d0 [ 31.506830] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.507668] kthread+0x24c/0x2d0 [ 31.508262] ret_from_fork+0x10/0x20 [ 31.508949] [ 31.509319] The buggy address belongs to the object at fff00000c638b000 [ 31.509319] which belongs to the cache test_cache of size 200 [ 31.510811] The buggy address is located 0 bytes inside of [ 31.510811] freed 200-byte region [fff00000c638b000, fff00000c638b0c8) [ 31.513180] [ 31.513658] The buggy address belongs to the physical page: [ 31.514592] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10638b [ 31.515802] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.516941] page_type: f5(slab) [ 31.517476] raw: 0bfffe0000000000 fff00000c56a0c80 dead000000000122 0000000000000000 [ 31.518496] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 31.519584] page dumped because: kasan: bad access detected [ 31.520495] [ 31.520994] Memory state around the buggy address: [ 31.521712] fff00000c638af00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.522760] fff00000c638af80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.524050] >fff00000c638b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.525413] ^ [ 31.525666] fff00000c638b080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.526598] fff00000c638b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.527735] ==================================================================
[ 29.268341] ================================================================== [ 29.269400] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 29.270116] Read of size 1 at addr ffff888101abc000 by task kunit_try_catch/220 [ 29.271075] [ 29.271292] CPU: 0 UID: 0 PID: 220 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241205 #1 [ 29.272530] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.272929] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 29.273756] Call Trace: [ 29.274228] <TASK> [ 29.274450] dump_stack_lvl+0x73/0xb0 [ 29.274936] print_report+0xd1/0x640 [ 29.275203] ? __virt_addr_valid+0x1db/0x2d0 [ 29.275501] ? kasan_complete_mode_report_info+0x64/0x200 [ 29.275910] kasan_report+0x102/0x140 [ 29.276183] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 29.276483] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 29.276988] __asan_report_load1_noabort+0x18/0x20 [ 29.277395] kmem_cache_rcu_uaf+0x3e5/0x510 [ 29.277854] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 29.278476] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 29.279207] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 29.279840] kunit_try_run_case+0x1b3/0x490 [ 29.280385] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.280910] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 29.281243] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 29.281953] ? __kthread_parkme+0x82/0x160 [ 29.282564] ? preempt_count_sub+0x50/0x80 [ 29.283215] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.283994] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 29.284703] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.285273] kthread+0x257/0x310 [ 29.285963] ? __pfx_kthread+0x10/0x10 [ 29.286319] ret_from_fork+0x41/0x80 [ 29.286740] ? __pfx_kthread+0x10/0x10 [ 29.287173] ret_from_fork_asm+0x1a/0x30 [ 29.287615] </TASK> [ 29.288084] [ 29.288246] Allocated by task 220: [ 29.288497] kasan_save_stack+0x3d/0x60 [ 29.289028] kasan_save_track+0x18/0x40 [ 29.289405] kasan_save_alloc_info+0x3b/0x50 [ 29.290115] __kasan_slab_alloc+0x91/0xa0 [ 29.290615] kmem_cache_alloc_noprof+0x11e/0x3e0 [ 29.291317] kmem_cache_rcu_uaf+0x156/0x510 [ 29.291722] kunit_try_run_case+0x1b3/0x490 [ 29.292224] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.293002] kthread+0x257/0x310 [ 29.293512] ret_from_fork+0x41/0x80 [ 29.294107] ret_from_fork_asm+0x1a/0x30 [ 29.294393] [ 29.294549] Freed by task 0: [ 29.295102] kasan_save_stack+0x3d/0x60 [ 29.295945] kasan_save_track+0x18/0x40 [ 29.296440] kasan_save_free_info+0x3f/0x60 [ 29.297132] __kasan_slab_free+0x56/0x70 [ 29.297500] slab_free_after_rcu_debug+0xe4/0x310 [ 29.298305] rcu_core+0x680/0x1d70 [ 29.298673] rcu_core_si+0x12/0x20 [ 29.299296] handle_softirqs+0x209/0x720 [ 29.299835] __irq_exit_rcu+0xc9/0x110 [ 29.300244] irq_exit_rcu+0x12/0x20 [ 29.300606] sysvec_apic_timer_interrupt+0x81/0x90 [ 29.301116] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 29.301590] [ 29.301918] Last potentially related work creation: [ 29.302222] kasan_save_stack+0x3d/0x60 [ 29.302499] kasan_record_aux_stack+0xb2/0xc0 [ 29.303196] kmem_cache_free+0x284/0x420 [ 29.303721] kmem_cache_rcu_uaf+0x195/0x510 [ 29.304213] kunit_try_run_case+0x1b3/0x490 [ 29.304517] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.305310] kthread+0x257/0x310 [ 29.305881] ret_from_fork+0x41/0x80 [ 29.306283] ret_from_fork_asm+0x1a/0x30 [ 29.306733] [ 29.307256] The buggy address belongs to the object at ffff888101abc000 [ 29.307256] which belongs to the cache test_cache of size 200 [ 29.308217] The buggy address is located 0 bytes inside of [ 29.308217] freed 200-byte region [ffff888101abc000, ffff888101abc0c8) [ 29.309669] [ 29.309994] The buggy address belongs to the physical page: [ 29.310587] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101abc [ 29.311368] flags: 0x200000000000000(node=0|zone=2) [ 29.312049] page_type: f5(slab) [ 29.312381] raw: 0200000000000000 ffff8881011e5dc0 dead000000000122 0000000000000000 [ 29.313108] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 29.313936] page dumped because: kasan: bad access detected [ 29.314503] [ 29.314799] Memory state around the buggy address: [ 29.315256] ffff888101abbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.315948] ffff888101abbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.316676] >ffff888101abc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.317319] ^ [ 29.317822] ffff888101abc080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.318656] ffff888101abc100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.319385] ==================================================================