Date
July 9, 2025, 12:11 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.866236] ================================================================== [ 20.866366] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 20.866463] Read of size 1 at addr fff00000c6472000 by task kunit_try_catch/214 [ 20.866518] [ 20.866565] CPU: 1 UID: 0 PID: 214 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 20.866653] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.866681] Hardware name: linux,dummy-virt (DT) [ 20.866714] Call trace: [ 20.866741] show_stack+0x20/0x38 (C) [ 20.866796] dump_stack_lvl+0x8c/0xd0 [ 20.866846] print_report+0x118/0x608 [ 20.866896] kasan_report+0xdc/0x128 [ 20.866941] __asan_report_load1_noabort+0x20/0x30 [ 20.866995] kmem_cache_rcu_uaf+0x388/0x468 [ 20.867043] kunit_try_run_case+0x170/0x3f0 [ 20.867107] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.867167] kthread+0x328/0x630 [ 20.867213] ret_from_fork+0x10/0x20 [ 20.867265] [ 20.867284] Allocated by task 214: [ 20.867318] kasan_save_stack+0x3c/0x68 [ 20.867361] kasan_save_track+0x20/0x40 [ 20.867440] kasan_save_alloc_info+0x40/0x58 [ 20.867483] __kasan_slab_alloc+0xa8/0xb0 [ 20.867522] kmem_cache_alloc_noprof+0x10c/0x398 [ 20.867573] kmem_cache_rcu_uaf+0x12c/0x468 [ 20.867790] kunit_try_run_case+0x170/0x3f0 [ 20.867842] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.868014] kthread+0x328/0x630 [ 20.868430] ret_from_fork+0x10/0x20 [ 20.869027] [ 20.869057] Freed by task 0: [ 20.869252] kasan_save_stack+0x3c/0x68 [ 20.869341] kasan_save_track+0x20/0x40 [ 20.869610] kasan_save_free_info+0x4c/0x78 [ 20.869675] __kasan_slab_free+0x6c/0x98 [ 20.869712] slab_free_after_rcu_debug+0xd4/0x2f8 [ 20.869754] rcu_core+0x9f4/0x1e20 [ 20.870677] rcu_core_si+0x18/0x30 [ 20.871233] handle_softirqs+0x374/0xb28 [ 20.871289] __do_softirq+0x1c/0x28 [ 20.871325] [ 20.871362] Last potentially related work creation: [ 20.871392] kasan_save_stack+0x3c/0x68 [ 20.871819] kasan_record_aux_stack+0xb4/0xc8 [ 20.872051] kmem_cache_free+0x120/0x468 [ 20.872755] kmem_cache_rcu_uaf+0x16c/0x468 [ 20.873427] kunit_try_run_case+0x170/0x3f0 [ 20.873583] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.873631] kthread+0x328/0x630 [ 20.874142] ret_from_fork+0x10/0x20 [ 20.874595] [ 20.874619] The buggy address belongs to the object at fff00000c6472000 [ 20.874619] which belongs to the cache test_cache of size 200 [ 20.875247] The buggy address is located 0 bytes inside of [ 20.875247] freed 200-byte region [fff00000c6472000, fff00000c64720c8) [ 20.875812] [ 20.875845] The buggy address belongs to the physical page: [ 20.876264] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106472 [ 20.876607] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.877089] page_type: f5(slab) [ 20.877297] raw: 0bfffe0000000000 fff00000c471a780 dead000000000122 0000000000000000 [ 20.877507] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 20.878263] page dumped because: kasan: bad access detected [ 20.878604] [ 20.878753] Memory state around the buggy address: [ 20.878932] fff00000c6471f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 20.878980] fff00000c6471f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 20.879025] >fff00000c6472000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.880077] ^ [ 20.880456] fff00000c6472080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 20.881016] fff00000c6472100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.881486] ==================================================================
[ 13.469115] ================================================================== [ 13.469752] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.470211] Read of size 1 at addr ffff888102ab6000 by task kunit_try_catch/230 [ 13.470660] [ 13.470982] CPU: 1 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.471033] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.471045] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.471067] Call Trace: [ 13.471545] <TASK> [ 13.471574] dump_stack_lvl+0x73/0xb0 [ 13.471613] print_report+0xd1/0x650 [ 13.471637] ? __virt_addr_valid+0x1db/0x2d0 [ 13.471660] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.471683] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.471706] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.471729] kasan_report+0x141/0x180 [ 13.471750] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.471777] __asan_report_load1_noabort+0x18/0x20 [ 13.471801] kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.471824] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 13.471847] ? finish_task_switch.isra.0+0x153/0x700 [ 13.471871] ? __switch_to+0x47/0xf50 [ 13.471898] ? __pfx_read_tsc+0x10/0x10 [ 13.471920] ? ktime_get_ts64+0x86/0x230 [ 13.472116] kunit_try_run_case+0x1a5/0x480 [ 13.472147] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.472170] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.472195] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.472464] ? __kthread_parkme+0x82/0x180 [ 13.472488] ? preempt_count_sub+0x50/0x80 [ 13.472512] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.472537] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.472561] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.472587] kthread+0x337/0x6f0 [ 13.472605] ? trace_preempt_on+0x20/0xc0 [ 13.472629] ? __pfx_kthread+0x10/0x10 [ 13.472650] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.472672] ? calculate_sigpending+0x7b/0xa0 [ 13.472696] ? __pfx_kthread+0x10/0x10 [ 13.472717] ret_from_fork+0x116/0x1d0 [ 13.472736] ? __pfx_kthread+0x10/0x10 [ 13.472756] ret_from_fork_asm+0x1a/0x30 [ 13.472787] </TASK> [ 13.472798] [ 13.484685] Allocated by task 230: [ 13.484896] kasan_save_stack+0x45/0x70 [ 13.485409] kasan_save_track+0x18/0x40 [ 13.485584] kasan_save_alloc_info+0x3b/0x50 [ 13.485970] __kasan_slab_alloc+0x91/0xa0 [ 13.486188] kmem_cache_alloc_noprof+0x123/0x3f0 [ 13.486459] kmem_cache_rcu_uaf+0x155/0x510 [ 13.486660] kunit_try_run_case+0x1a5/0x480 [ 13.486858] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.487109] kthread+0x337/0x6f0 [ 13.487354] ret_from_fork+0x116/0x1d0 [ 13.487518] ret_from_fork_asm+0x1a/0x30 [ 13.488268] [ 13.488372] Freed by task 0: [ 13.488559] kasan_save_stack+0x45/0x70 [ 13.488794] kasan_save_track+0x18/0x40 [ 13.489357] kasan_save_free_info+0x3f/0x60 [ 13.489658] __kasan_slab_free+0x56/0x70 [ 13.489884] slab_free_after_rcu_debug+0xe4/0x310 [ 13.490275] rcu_core+0x66f/0x1c40 [ 13.490737] rcu_core_si+0x12/0x20 [ 13.490963] handle_softirqs+0x209/0x730 [ 13.491414] __irq_exit_rcu+0xc9/0x110 [ 13.491577] irq_exit_rcu+0x12/0x20 [ 13.491786] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.492431] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.492659] [ 13.492745] Last potentially related work creation: [ 13.493100] kasan_save_stack+0x45/0x70 [ 13.493680] kasan_record_aux_stack+0xb2/0xc0 [ 13.493854] kmem_cache_free+0x131/0x420 [ 13.494371] kmem_cache_rcu_uaf+0x194/0x510 [ 13.494583] kunit_try_run_case+0x1a5/0x480 [ 13.494921] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.495354] kthread+0x337/0x6f0 [ 13.495603] ret_from_fork+0x116/0x1d0 [ 13.495847] ret_from_fork_asm+0x1a/0x30 [ 13.496095] [ 13.496505] The buggy address belongs to the object at ffff888102ab6000 [ 13.496505] which belongs to the cache test_cache of size 200 [ 13.497351] The buggy address is located 0 bytes inside of [ 13.497351] freed 200-byte region [ffff888102ab6000, ffff888102ab60c8) [ 13.497854] [ 13.498180] The buggy address belongs to the physical page: [ 13.498605] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ab6 [ 13.498963] flags: 0x200000000000000(node=0|zone=2) [ 13.499404] page_type: f5(slab) [ 13.499674] raw: 0200000000000000 ffff888100929b40 dead000000000122 0000000000000000 [ 13.500347] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 13.500776] page dumped because: kasan: bad access detected [ 13.501030] [ 13.501132] Memory state around the buggy address: [ 13.501630] ffff888102ab5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.501946] ffff888102ab5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.502576] >ffff888102ab6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.503085] ^ [ 13.503244] ffff888102ab6080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 13.503761] ffff888102ab6100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.504269] ==================================================================