Date
Dec. 3, 2024, 11:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.872408] ================================================================== [ 31.873678] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 31.874807] Read of size 1 at addr fff00000c5917000 by task kunit_try_catch/202 [ 31.875987] [ 31.876591] CPU: 1 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241203 #1 [ 31.878053] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.878748] Hardware name: linux,dummy-virt (DT) [ 31.879439] Call trace: [ 31.879863] show_stack+0x20/0x38 (C) [ 31.880839] dump_stack_lvl+0x8c/0xd0 [ 31.881473] print_report+0x118/0x5e0 [ 31.882200] kasan_report+0xc8/0x118 [ 31.882904] __asan_report_load1_noabort+0x20/0x30 [ 31.883992] kmem_cache_rcu_uaf+0x390/0x468 [ 31.884702] kunit_try_run_case+0x14c/0x3d0 [ 31.885515] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.886399] kthread+0x24c/0x2d0 [ 31.886953] ret_from_fork+0x10/0x20 [ 31.887832] [ 31.888470] Allocated by task 202: [ 31.888986] kasan_save_stack+0x3c/0x68 [ 31.889559] kasan_save_track+0x20/0x40 [ 31.890159] kasan_save_alloc_info+0x40/0x58 [ 31.890768] __kasan_slab_alloc+0xa8/0xb0 [ 31.891887] kmem_cache_alloc_noprof+0x108/0x398 [ 31.892380] kmem_cache_rcu_uaf+0x12c/0x468 [ 31.893476] kunit_try_run_case+0x14c/0x3d0 [ 31.894269] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.895007] kthread+0x24c/0x2d0 [ 31.895641] ret_from_fork+0x10/0x20 [ 31.896622] [ 31.897048] Freed by task 0: [ 31.897646] kasan_save_stack+0x3c/0x68 [ 31.898488] kasan_save_track+0x20/0x40 [ 31.899443] kasan_save_free_info+0x4c/0x78 [ 31.900094] __kasan_slab_free+0x6c/0x98 [ 31.900660] slab_free_after_rcu_debug+0xd4/0x2f8 [ 31.901279] rcu_core+0x9f4/0x1e20 [ 31.901944] rcu_core_si+0x18/0x30 [ 31.902748] handle_softirqs+0x374/0xb20 [ 31.903851] __do_softirq+0x1c/0x28 [ 31.904623] [ 31.905072] Last potentially related work creation: [ 31.905894] kasan_save_stack+0x3c/0x68 [ 31.906637] kasan_record_aux_stack+0xb4/0xc8 [ 31.907475] kmem_cache_free+0x28c/0x470 [ 31.908364] kmem_cache_rcu_uaf+0x16c/0x468 [ 31.909172] kunit_try_run_case+0x14c/0x3d0 [ 31.909901] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.911356] kthread+0x24c/0x2d0 [ 31.911911] ret_from_fork+0x10/0x20 [ 31.912358] [ 31.912742] The buggy address belongs to the object at fff00000c5917000 [ 31.912742] which belongs to the cache test_cache of size 200 [ 31.914555] The buggy address is located 0 bytes inside of [ 31.914555] freed 200-byte region [fff00000c5917000, fff00000c59170c8) [ 31.916440] [ 31.917008] The buggy address belongs to the physical page: [ 31.917762] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105917 [ 31.918744] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.919895] page_type: f5(slab) [ 31.920395] raw: 0bfffe0000000000 fff00000c56f9780 dead000000000122 0000000000000000 [ 31.921416] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 31.922436] page dumped because: kasan: bad access detected [ 31.923090] [ 31.923442] Memory state around the buggy address: [ 31.924449] fff00000c5916f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.925435] fff00000c5916f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.926283] >fff00000c5917000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.927522] ^ [ 31.928026] fff00000c5917080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.929105] fff00000c5917100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.930012] ==================================================================
[ 27.267020] ================================================================== [ 27.267678] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 27.268304] Read of size 1 at addr ffff888102a02000 by task kunit_try_catch/222 [ 27.268915] [ 27.269310] CPU: 1 UID: 0 PID: 222 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241203 #1 [ 27.270797] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.271621] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.272425] Call Trace: [ 27.272797] <TASK> [ 27.273095] dump_stack_lvl+0x73/0xb0 [ 27.273690] print_report+0xd1/0x640 [ 27.274156] ? __virt_addr_valid+0x1db/0x2d0 [ 27.275110] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.275732] kasan_report+0x102/0x140 [ 27.276018] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 27.276634] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 27.277223] __asan_report_load1_noabort+0x18/0x20 [ 27.278007] kmem_cache_rcu_uaf+0x3e5/0x510 [ 27.278523] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 27.279094] ? finish_task_switch.isra.0+0x153/0x700 [ 27.279583] ? __switch_to+0x5d9/0xf60 [ 27.279957] ? __pfx_read_tsc+0x10/0x10 [ 27.280451] ? ktime_get_ts64+0x86/0x230 [ 27.281171] kunit_try_run_case+0x1b3/0x490 [ 27.281719] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.282246] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 27.282809] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.283111] ? __kthread_parkme+0x82/0x160 [ 27.283359] ? preempt_count_sub+0x50/0x80 [ 27.283650] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.283975] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.284508] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.285092] kthread+0x257/0x310 [ 27.285494] ? __pfx_kthread+0x10/0x10 [ 27.285912] ret_from_fork+0x41/0x80 [ 27.286278] ? __pfx_kthread+0x10/0x10 [ 27.286579] ret_from_fork_asm+0x1a/0x30 [ 27.286913] </TASK> [ 27.287197] [ 27.287421] Allocated by task 222: [ 27.287816] kasan_save_stack+0x3d/0x60 [ 27.288216] kasan_save_track+0x18/0x40 [ 27.288644] kasan_save_alloc_info+0x3b/0x50 [ 27.289037] __kasan_slab_alloc+0x91/0xa0 [ 27.290734] kmem_cache_alloc_noprof+0x11e/0x3e0 [ 27.291264] kmem_cache_rcu_uaf+0x156/0x510 [ 27.291547] kunit_try_run_case+0x1b3/0x490 [ 27.291928] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.292436] kthread+0x257/0x310 [ 27.292736] ret_from_fork+0x41/0x80 [ 27.293964] ret_from_fork_asm+0x1a/0x30 [ 27.294433] [ 27.294592] Freed by task 0: [ 27.294914] kasan_save_stack+0x3d/0x60 [ 27.295235] kasan_save_track+0x18/0x40 [ 27.295516] kasan_save_free_info+0x3f/0x60 [ 27.295895] __kasan_slab_free+0x56/0x70 [ 27.296361] slab_free_after_rcu_debug+0xe4/0x310 [ 27.296672] rcu_core+0x680/0x1d70 [ 27.296910] rcu_core_si+0x12/0x20 [ 27.297276] handle_softirqs+0x209/0x720 [ 27.297653] __irq_exit_rcu+0xc9/0x110 [ 27.298035] irq_exit_rcu+0x12/0x20 [ 27.299230] sysvec_apic_timer_interrupt+0x81/0x90 [ 27.299875] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 27.300378] [ 27.300765] Last potentially related work creation: [ 27.301163] kasan_save_stack+0x3d/0x60 [ 27.301418] kasan_record_aux_stack+0xb2/0xc0 [ 27.302448] kmem_cache_free+0x284/0x420 [ 27.302832] kmem_cache_rcu_uaf+0x195/0x510 [ 27.303398] kunit_try_run_case+0x1b3/0x490 [ 27.303990] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.304421] kthread+0x257/0x310 [ 27.304865] ret_from_fork+0x41/0x80 [ 27.305276] ret_from_fork_asm+0x1a/0x30 [ 27.306267] [ 27.306527] The buggy address belongs to the object at ffff888102a02000 [ 27.306527] which belongs to the cache test_cache of size 200 [ 27.307282] The buggy address is located 0 bytes inside of [ 27.307282] freed 200-byte region [ffff888102a02000, ffff888102a020c8) [ 27.308494] [ 27.308789] The buggy address belongs to the physical page: [ 27.309279] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a02 [ 27.310524] flags: 0x200000000000000(node=0|zone=2) [ 27.311007] page_type: f5(slab) [ 27.311357] raw: 0200000000000000 ffff888101e70500 dead000000000122 0000000000000000 [ 27.311928] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 27.312597] page dumped because: kasan: bad access detected [ 27.313072] [ 27.313279] Memory state around the buggy address: [ 27.313702] ffff888102a01f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.314137] ffff888102a01f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.314698] >ffff888102a02000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.316027] ^ [ 27.316348] ffff888102a02080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 27.316996] ffff888102a02100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.317761] ==================================================================