Date
June 17, 2025, 6:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.111205] ================================================================== [ 18.111309] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 18.111395] Read of size 1 at addr fff00000c507c000 by task kunit_try_catch/222 [ 18.111450] [ 18.111496] CPU: 1 UID: 0 PID: 222 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250617 #1 PREEMPT [ 18.111589] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.111617] Hardware name: linux,dummy-virt (DT) [ 18.111652] Call trace: [ 18.111679] show_stack+0x20/0x38 (C) [ 18.111733] dump_stack_lvl+0x8c/0xd0 [ 18.111786] print_report+0x118/0x608 [ 18.111836] kasan_report+0xdc/0x128 [ 18.111883] __asan_report_load1_noabort+0x20/0x30 [ 18.111949] kmem_cache_rcu_uaf+0x388/0x468 [ 18.112000] kunit_try_run_case+0x170/0x3f0 [ 18.112054] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.112108] kthread+0x328/0x630 [ 18.112153] ret_from_fork+0x10/0x20 [ 18.112203] [ 18.112222] Allocated by task 222: [ 18.112256] kasan_save_stack+0x3c/0x68 [ 18.112299] kasan_save_track+0x20/0x40 [ 18.112337] kasan_save_alloc_info+0x40/0x58 [ 18.112375] __kasan_slab_alloc+0xa8/0xb0 [ 18.112413] kmem_cache_alloc_noprof+0x10c/0x398 [ 18.112454] kmem_cache_rcu_uaf+0x12c/0x468 [ 18.112492] kunit_try_run_case+0x170/0x3f0 [ 18.112529] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.112573] kthread+0x328/0x630 [ 18.112606] ret_from_fork+0x10/0x20 [ 18.112642] [ 18.112660] Freed by task 0: [ 18.112687] kasan_save_stack+0x3c/0x68 [ 18.112723] kasan_save_track+0x20/0x40 [ 18.112761] kasan_save_free_info+0x4c/0x78 [ 18.112796] __kasan_slab_free+0x6c/0x98 [ 18.112834] slab_free_after_rcu_debug+0xd4/0x2f8 [ 18.112874] rcu_core+0x9f4/0x1e20 [ 18.112913] rcu_core_si+0x18/0x30 [ 18.115987] handle_softirqs+0x374/0xb28 [ 18.116033] __do_softirq+0x1c/0x28 [ 18.116071] [ 18.116092] Last potentially related work creation: [ 18.116120] kasan_save_stack+0x3c/0x68 [ 18.116160] kasan_record_aux_stack+0xb4/0xc8 [ 18.116198] kmem_cache_free+0x120/0x468 [ 18.116238] kmem_cache_rcu_uaf+0x16c/0x468 [ 18.116277] kunit_try_run_case+0x170/0x3f0 [ 18.116314] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.116358] kthread+0x328/0x630 [ 18.116391] ret_from_fork+0x10/0x20 [ 18.116427] [ 18.116447] The buggy address belongs to the object at fff00000c507c000 [ 18.116447] which belongs to the cache test_cache of size 200 [ 18.116510] The buggy address is located 0 bytes inside of [ 18.116510] freed 200-byte region [fff00000c507c000, fff00000c507c0c8) [ 18.116574] [ 18.116597] The buggy address belongs to the physical page: [ 18.116632] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10507c [ 18.116692] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.116745] page_type: f5(slab) [ 18.116788] raw: 0bfffe0000000000 fff00000c115d8c0 dead000000000122 0000000000000000 [ 18.116840] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 18.116883] page dumped because: kasan: bad access detected [ 18.116916] [ 18.116942] Memory state around the buggy address: [ 18.117021] fff00000c507bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.117102] fff00000c507bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.117225] >fff00000c507c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.117283] ^ [ 18.117331] fff00000c507c080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 18.117375] fff00000c507c100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.117427] ==================================================================
[ 19.248575] ================================================================== [ 19.249277] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 19.250239] Read of size 1 at addr ffff88810383a000 by task kunit_try_catch/240 [ 19.250972] [ 19.251630] CPU: 1 UID: 0 PID: 240 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250617 #1 PREEMPT(voluntary) [ 19.251761] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.251797] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 19.251936] Call Trace: [ 19.252037] <TASK> [ 19.252089] dump_stack_lvl+0x73/0xb0 [ 19.252175] print_report+0xd1/0x650 [ 19.252389] ? __virt_addr_valid+0x1db/0x2d0 [ 19.252465] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 19.252503] ? kasan_complete_mode_report_info+0x64/0x200 [ 19.252536] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 19.252569] kasan_report+0x141/0x180 [ 19.252600] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 19.252640] __asan_report_load1_noabort+0x18/0x20 [ 19.252677] kmem_cache_rcu_uaf+0x3e3/0x510 [ 19.252711] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 19.252742] ? finish_task_switch.isra.0+0x153/0x700 [ 19.252773] ? __switch_to+0x47/0xf50 [ 19.252811] ? __pfx_read_tsc+0x10/0x10 [ 19.252869] ? ktime_get_ts64+0x86/0x230 [ 19.252905] kunit_try_run_case+0x1a5/0x480 [ 19.252942] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.252973] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 19.253002] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 19.253038] ? __kthread_parkme+0x82/0x180 [ 19.253067] ? preempt_count_sub+0x50/0x80 [ 19.253098] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.253131] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.253164] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 19.253196] kthread+0x337/0x6f0 [ 19.253284] ? trace_preempt_on+0x20/0xc0 [ 19.253359] ? __pfx_kthread+0x10/0x10 [ 19.253390] ? _raw_spin_unlock_irq+0x47/0x80 [ 19.253423] ? calculate_sigpending+0x7b/0xa0 [ 19.253458] ? __pfx_kthread+0x10/0x10 [ 19.253486] ret_from_fork+0x116/0x1d0 [ 19.253512] ? __pfx_kthread+0x10/0x10 [ 19.253540] ret_from_fork_asm+0x1a/0x30 [ 19.253581] </TASK> [ 19.253597] [ 19.270212] Allocated by task 240: [ 19.270736] kasan_save_stack+0x45/0x70 [ 19.271193] kasan_save_track+0x18/0x40 [ 19.271721] kasan_save_alloc_info+0x3b/0x50 [ 19.272178] __kasan_slab_alloc+0x91/0xa0 [ 19.272763] kmem_cache_alloc_noprof+0x123/0x3f0 [ 19.273143] kmem_cache_rcu_uaf+0x155/0x510 [ 19.273915] kunit_try_run_case+0x1a5/0x480 [ 19.274390] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.275027] kthread+0x337/0x6f0 [ 19.275569] ret_from_fork+0x116/0x1d0 [ 19.275935] ret_from_fork_asm+0x1a/0x30 [ 19.276503] [ 19.276729] Freed by task 0: [ 19.277042] kasan_save_stack+0x45/0x70 [ 19.277493] kasan_save_track+0x18/0x40 [ 19.278108] kasan_save_free_info+0x3f/0x60 [ 19.278707] __kasan_slab_free+0x56/0x70 [ 19.279124] slab_free_after_rcu_debug+0xe4/0x310 [ 19.279768] rcu_core+0x66f/0x1c40 [ 19.280189] rcu_core_si+0x12/0x20 [ 19.280665] handle_softirqs+0x209/0x730 [ 19.280976] __irq_exit_rcu+0xc9/0x110 [ 19.281523] irq_exit_rcu+0x12/0x20 [ 19.282158] sysvec_apic_timer_interrupt+0x81/0x90 [ 19.282748] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 19.283190] [ 19.283566] Last potentially related work creation: [ 19.284057] kasan_save_stack+0x45/0x70 [ 19.284578] kasan_record_aux_stack+0xb2/0xc0 [ 19.285010] kmem_cache_free+0x131/0x420 [ 19.285492] kmem_cache_rcu_uaf+0x194/0x510 [ 19.285908] kunit_try_run_case+0x1a5/0x480 [ 19.286639] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.287094] kthread+0x337/0x6f0 [ 19.287651] ret_from_fork+0x116/0x1d0 [ 19.287970] ret_from_fork_asm+0x1a/0x30 [ 19.288545] [ 19.288749] The buggy address belongs to the object at ffff88810383a000 [ 19.288749] which belongs to the cache test_cache of size 200 [ 19.289799] The buggy address is located 0 bytes inside of [ 19.289799] freed 200-byte region [ffff88810383a000, ffff88810383a0c8) [ 19.291172] [ 19.291545] The buggy address belongs to the physical page: [ 19.291989] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10383a [ 19.292779] flags: 0x200000000000000(node=0|zone=2) [ 19.293371] page_type: f5(slab) [ 19.293738] raw: 0200000000000000 ffff888101db3780 dead000000000122 0000000000000000 [ 19.294612] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.295313] page dumped because: kasan: bad access detected [ 19.295761] [ 19.295975] Memory state around the buggy address: [ 19.296340] ffff888103839f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.297189] ffff888103839f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.297878] >ffff88810383a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.298794] ^ [ 19.299105] ffff88810383a080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.299818] ffff88810383a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.300524] ==================================================================