Date
July 18, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.514090] ================================================================== [ 16.514205] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 16.514286] Read of size 1 at addr fff00000c3f28000 by task kunit_try_catch/213 [ 16.514351] [ 16.515694] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.515860] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.516689] Hardware name: linux,dummy-virt (DT) [ 16.516851] Call trace: [ 16.517088] show_stack+0x20/0x38 (C) [ 16.517743] dump_stack_lvl+0x8c/0xd0 [ 16.517896] print_report+0x118/0x5d0 [ 16.518371] kasan_report+0xdc/0x128 [ 16.518608] __asan_report_load1_noabort+0x20/0x30 [ 16.518663] kmem_cache_rcu_uaf+0x388/0x468 [ 16.518709] kunit_try_run_case+0x170/0x3f0 [ 16.519464] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.519533] kthread+0x328/0x630 [ 16.520117] ret_from_fork+0x10/0x20 [ 16.520548] [ 16.521080] Allocated by task 213: [ 16.521119] kasan_save_stack+0x3c/0x68 [ 16.521169] kasan_save_track+0x20/0x40 [ 16.521208] kasan_save_alloc_info+0x40/0x58 [ 16.521247] __kasan_slab_alloc+0xa8/0xb0 [ 16.521981] kmem_cache_alloc_noprof+0x10c/0x398 [ 16.522226] kmem_cache_rcu_uaf+0x12c/0x468 [ 16.522796] kunit_try_run_case+0x170/0x3f0 [ 16.523158] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.523976] kthread+0x328/0x630 [ 16.524139] ret_from_fork+0x10/0x20 [ 16.524180] [ 16.524570] Freed by task 0: [ 16.524607] kasan_save_stack+0x3c/0x68 [ 16.524952] kasan_save_track+0x20/0x40 [ 16.525158] kasan_save_free_info+0x4c/0x78 [ 16.525200] __kasan_slab_free+0x6c/0x98 [ 16.525765] slab_free_after_rcu_debug+0xd4/0x2f8 [ 16.525925] rcu_core+0x9f4/0x1e20 [ 16.526243] rcu_core_si+0x18/0x30 [ 16.527148] handle_softirqs+0x374/0xb28 [ 16.527302] __do_softirq+0x1c/0x28 [ 16.527450] [ 16.527586] Last potentially related work creation: [ 16.527651] kasan_save_stack+0x3c/0x68 [ 16.527792] kasan_record_aux_stack+0xb4/0xc8 [ 16.528008] kmem_cache_free+0x120/0x468 [ 16.528050] kmem_cache_rcu_uaf+0x16c/0x468 [ 16.528134] kunit_try_run_case+0x170/0x3f0 [ 16.528232] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.528276] kthread+0x328/0x630 [ 16.528309] ret_from_fork+0x10/0x20 [ 16.528450] [ 16.528471] The buggy address belongs to the object at fff00000c3f28000 [ 16.528471] which belongs to the cache test_cache of size 200 [ 16.529525] The buggy address is located 0 bytes inside of [ 16.529525] freed 200-byte region [fff00000c3f28000, fff00000c3f280c8) [ 16.530088] [ 16.530850] The buggy address belongs to the physical page: [ 16.530975] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f28 [ 16.531050] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.531106] page_type: f5(slab) [ 16.531152] raw: 0bfffe0000000000 fff00000c3e97dc0 dead000000000122 0000000000000000 [ 16.531558] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 16.532139] page dumped because: kasan: bad access detected [ 16.532688] [ 16.532709] Memory state around the buggy address: [ 16.532750] fff00000c3f27f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.533196] fff00000c3f27f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.533368] >fff00000c3f28000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.533613] ^ [ 16.533647] fff00000c3f28080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 16.533709] fff00000c3f28100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.534003] ==================================================================
[ 12.957193] ================================================================== [ 12.957723] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.958206] Read of size 1 at addr ffff8881029dc000 by task kunit_try_catch/232 [ 12.958602] [ 12.958712] CPU: 0 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.958789] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.958802] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.958823] Call Trace: [ 12.958837] <TASK> [ 12.958886] dump_stack_lvl+0x73/0xb0 [ 12.958918] print_report+0xd1/0x610 [ 12.958940] ? __virt_addr_valid+0x1db/0x2d0 [ 12.958975] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.958998] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.959020] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.959043] kasan_report+0x141/0x180 [ 12.959064] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.959187] __asan_report_load1_noabort+0x18/0x20 [ 12.959213] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.959236] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.959258] ? finish_task_switch.isra.0+0x153/0x700 [ 12.959293] ? __switch_to+0x47/0xf50 [ 12.959321] ? __pfx_read_tsc+0x10/0x10 [ 12.959342] ? ktime_get_ts64+0x86/0x230 [ 12.959397] kunit_try_run_case+0x1a5/0x480 [ 12.959423] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.959737] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.959766] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.959790] ? __kthread_parkme+0x82/0x180 [ 12.959811] ? preempt_count_sub+0x50/0x80 [ 12.959834] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.959857] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.959882] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.959906] kthread+0x337/0x6f0 [ 12.959925] ? trace_preempt_on+0x20/0xc0 [ 12.959948] ? __pfx_kthread+0x10/0x10 [ 12.959968] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.959990] ? calculate_sigpending+0x7b/0xa0 [ 12.960014] ? __pfx_kthread+0x10/0x10 [ 12.960109] ret_from_fork+0x116/0x1d0 [ 12.960129] ? __pfx_kthread+0x10/0x10 [ 12.960149] ret_from_fork_asm+0x1a/0x30 [ 12.960179] </TASK> [ 12.960189] [ 12.969092] Allocated by task 232: [ 12.969257] kasan_save_stack+0x45/0x70 [ 12.969586] kasan_save_track+0x18/0x40 [ 12.969852] kasan_save_alloc_info+0x3b/0x50 [ 12.970223] __kasan_slab_alloc+0x91/0xa0 [ 12.970377] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.970766] kmem_cache_rcu_uaf+0x155/0x510 [ 12.971104] kunit_try_run_case+0x1a5/0x480 [ 12.971313] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.971689] kthread+0x337/0x6f0 [ 12.971904] ret_from_fork+0x116/0x1d0 [ 12.972072] ret_from_fork_asm+0x1a/0x30 [ 12.972244] [ 12.972447] Freed by task 0: [ 12.972647] kasan_save_stack+0x45/0x70 [ 12.972840] kasan_save_track+0x18/0x40 [ 12.973047] kasan_save_free_info+0x3f/0x60 [ 12.973261] __kasan_slab_free+0x56/0x70 [ 12.973479] slab_free_after_rcu_debug+0xe4/0x310 [ 12.973810] rcu_core+0x66f/0x1c40 [ 12.973991] rcu_core_si+0x12/0x20 [ 12.974162] handle_softirqs+0x209/0x730 [ 12.974541] __irq_exit_rcu+0xc9/0x110 [ 12.974727] irq_exit_rcu+0x12/0x20 [ 12.974849] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.975110] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.975364] [ 12.975461] Last potentially related work creation: [ 12.975632] kasan_save_stack+0x45/0x70 [ 12.975764] kasan_record_aux_stack+0xb2/0xc0 [ 12.975910] kmem_cache_free+0x131/0x420 [ 12.976074] kmem_cache_rcu_uaf+0x194/0x510 [ 12.976293] kunit_try_run_case+0x1a5/0x480 [ 12.976636] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.976954] kthread+0x337/0x6f0 [ 12.977323] ret_from_fork+0x116/0x1d0 [ 12.977620] ret_from_fork_asm+0x1a/0x30 [ 12.977795] [ 12.977864] The buggy address belongs to the object at ffff8881029dc000 [ 12.977864] which belongs to the cache test_cache of size 200 [ 12.978247] The buggy address is located 0 bytes inside of [ 12.978247] freed 200-byte region [ffff8881029dc000, ffff8881029dc0c8) [ 12.979010] [ 12.979146] The buggy address belongs to the physical page: [ 12.979464] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029dc [ 12.980006] flags: 0x200000000000000(node=0|zone=2) [ 12.980221] page_type: f5(slab) [ 12.980505] raw: 0200000000000000 ffff888100a74280 dead000000000122 0000000000000000 [ 12.980877] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.981394] page dumped because: kasan: bad access detected [ 12.981725] [ 12.981797] Memory state around the buggy address: [ 12.981950] ffff8881029dbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.982640] ffff8881029dbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.982988] >ffff8881029dc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.983489] ^ [ 12.983672] ffff8881029dc080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.984024] ffff8881029dc100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.984433] ==================================================================