Date
June 26, 2025, 9:10 a.m.
| Environment | |
|---|---|
| dragonboard-845c | |
| qemu-arm64 | |
| qemu-x86_64 |
[ 45.924166] ================================================================== [ 45.935939] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 45.943178] Read of size 1 at addr ffff000094654000 by task kunit_try_catch/299 [ 45.950586] [ 45.952126] CPU: 7 UID: 0 PID: 299 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250626 #1 PREEMPT [ 45.952162] Tainted: [B]=BAD_PAGE, [N]=TEST [ 45.952170] Hardware name: Thundercomm Dragonboard 845c (DT) [ 45.952185] Call trace: [ 45.952193] show_stack+0x20/0x38 (C) [ 45.952215] dump_stack_lvl+0x8c/0xd0 [ 45.952236] print_report+0x118/0x608 [ 45.952258] kasan_report+0xdc/0x128 [ 45.952277] __asan_report_load1_noabort+0x20/0x30 [ 45.952293] kmem_cache_rcu_uaf+0x388/0x468 [ 45.952310] kunit_try_run_case+0x170/0x3f0 [ 45.952383] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 45.952402] kthread+0x328/0x630 [ 45.952416] ret_from_fork+0x10/0x20 [ 45.952435] [ 46.018092] Allocated by task 299: [ 46.021546] kasan_save_stack+0x3c/0x68 [ 46.025450] kasan_save_track+0x20/0x40 [ 46.029353] kasan_save_alloc_info+0x40/0x58 [ 46.033685] __kasan_slab_alloc+0xa8/0xb0 [ 46.037761] kmem_cache_alloc_noprof+0x10c/0x398 [ 46.042448] kmem_cache_rcu_uaf+0x12c/0x468 [ 46.046696] kunit_try_run_case+0x170/0x3f0 [ 46.050943] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 46.056512] kthread+0x328/0x630 [ 46.059793] ret_from_fork+0x10/0x20 [ 46.063423] [ 46.064954] Freed by task 0: [ 46.067888] kasan_save_stack+0x3c/0x68 [ 46.071790] kasan_save_track+0x20/0x40 [ 46.075693] kasan_save_free_info+0x4c/0x78 [ 46.079938] __kasan_slab_free+0x6c/0x98 [ 46.083928] slab_free_after_rcu_debug+0xd4/0x2f8 [ 46.088697] rcu_core+0x9f4/0x1e20 [ 46.092157] rcu_core_si+0x18/0x30 [ 46.095613] handle_softirqs+0x374/0xb28 [ 46.099602] __do_softirq+0x1c/0x28 [ 46.103147] [ 46.104675] Last potentially related work creation: [ 46.109611] kasan_save_stack+0x3c/0x68 [ 46.113512] kasan_record_aux_stack+0xb4/0xc8 [ 46.117933] kmem_cache_free+0x120/0x468 [ 46.121920] kmem_cache_rcu_uaf+0x16c/0x468 [ 46.126168] kunit_try_run_case+0x170/0x3f0 [ 46.130415] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 46.135983] kthread+0x328/0x630 [ 46.139267] ret_from_fork+0x10/0x20 [ 46.142899] [ 46.144425] The buggy address belongs to the object at ffff000094654000 [ 46.144425] which belongs to the cache test_cache of size 200 [ 46.156992] The buggy address is located 0 bytes inside of [ 46.156992] freed 200-byte region [ffff000094654000, ffff0000946540c8) [ 46.169210] [ 46.170735] The buggy address belongs to the physical page: [ 46.176384] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x114654 [ 46.184485] head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 46.192235] flags: 0xbfffe0000000040(head|node=0|zone=2|lastcpupid=0x1ffff) [ 46.199292] page_type: f5(slab) [ 46.202493] raw: 0bfffe0000000040 ffff00008195f040 dead000000000122 0000000000000000 [ 46.210332] raw: 0000000000000000 00000000801f001f 00000000f5000000 0000000000000000 [ 46.218170] head: 0bfffe0000000040 ffff00008195f040 dead000000000122 0000000000000000 [ 46.226095] head: 0000000000000000 00000000801f001f 00000000f5000000 0000000000000000 [ 46.234019] head: 0bfffe0000000001 fffffdffc2519501 00000000ffffffff 00000000ffffffff [ 46.241943] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 [ 46.249863] page dumped because: kasan: bad access detected [ 46.255500] [ 46.257032] Memory state around the buggy address: [ 46.261885] ffff000094653f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 46.269198] ffff000094653f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 46.276511] >ffff000094654000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.283821] ^ [ 46.287105] ffff000094654080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 46.294416] ffff000094654100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 46.301726] ==================================================================
[ 28.172157] ================================================================== [ 28.172246] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 28.172324] Read of size 1 at addr fff00000c77fa000 by task kunit_try_catch/225 [ 28.172375] [ 28.172418] CPU: 1 UID: 0 PID: 225 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250626 #1 PREEMPT [ 28.172509] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.172537] Hardware name: linux,dummy-virt (DT) [ 28.172570] Call trace: [ 28.172596] show_stack+0x20/0x38 (C) [ 28.172650] dump_stack_lvl+0x8c/0xd0 [ 28.172704] print_report+0x118/0x608 [ 28.172751] kasan_report+0xdc/0x128 [ 28.172797] __asan_report_load1_noabort+0x20/0x30 [ 28.172846] kmem_cache_rcu_uaf+0x388/0x468 [ 28.172896] kunit_try_run_case+0x170/0x3f0 [ 28.172948] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.173000] kthread+0x328/0x630 [ 28.173046] ret_from_fork+0x10/0x20 [ 28.173110] [ 28.173130] Allocated by task 225: [ 28.173159] kasan_save_stack+0x3c/0x68 [ 28.173201] kasan_save_track+0x20/0x40 [ 28.173240] kasan_save_alloc_info+0x40/0x58 [ 28.173277] __kasan_slab_alloc+0xa8/0xb0 [ 28.173315] kmem_cache_alloc_noprof+0x10c/0x398 [ 28.173356] kmem_cache_rcu_uaf+0x12c/0x468 [ 28.173394] kunit_try_run_case+0x170/0x3f0 [ 28.173431] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.173475] kthread+0x328/0x630 [ 28.173506] ret_from_fork+0x10/0x20 [ 28.173541] [ 28.173560] Freed by task 0: [ 28.173586] kasan_save_stack+0x3c/0x68 [ 28.173623] kasan_save_track+0x20/0x40 [ 28.173659] kasan_save_free_info+0x4c/0x78 [ 28.173696] __kasan_slab_free+0x6c/0x98 [ 28.173732] slab_free_after_rcu_debug+0xd4/0x2f8 [ 28.173773] rcu_core+0x9f4/0x1e20 [ 28.173810] rcu_core_si+0x18/0x30 [ 28.173844] handle_softirqs+0x374/0xb28 [ 28.173881] __do_softirq+0x1c/0x28 [ 28.173916] [ 28.173935] Last potentially related work creation: [ 28.173962] kasan_save_stack+0x3c/0x68 [ 28.174001] kasan_record_aux_stack+0xb4/0xc8 [ 28.174038] kmem_cache_free+0x120/0x468 [ 28.174087] kmem_cache_rcu_uaf+0x16c/0x468 [ 28.174124] kunit_try_run_case+0x170/0x3f0 [ 28.174167] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.174212] kthread+0x328/0x630 [ 28.174244] ret_from_fork+0x10/0x20 [ 28.174280] [ 28.174298] The buggy address belongs to the object at fff00000c77fa000 [ 28.174298] which belongs to the cache test_cache of size 200 [ 28.174357] The buggy address is located 0 bytes inside of [ 28.174357] freed 200-byte region [fff00000c77fa000, fff00000c77fa0c8) [ 28.174417] [ 28.174439] The buggy address belongs to the physical page: [ 28.174471] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1077fa [ 28.174528] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 28.174580] page_type: f5(slab) [ 28.174621] raw: 0bfffe0000000000 fff00000c56c28c0 dead000000000122 0000000000000000 [ 28.174671] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 28.174713] page dumped because: kasan: bad access detected [ 28.174745] [ 28.174762] Memory state around the buggy address: [ 28.174793] fff00000c77f9f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 28.174836] fff00000c77f9f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 28.174879] >fff00000c77fa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.174917] ^ [ 28.174943] fff00000c77fa080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.174985] fff00000c77fa100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.175025] ==================================================================
[ 22.910198] ================================================================== [ 22.911421] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.911779] Read of size 1 at addr ffff888102d58000 by task kunit_try_catch/242 [ 22.912288] [ 22.912396] CPU: 1 UID: 0 PID: 242 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250626 #1 PREEMPT(voluntary) [ 22.912452] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.912465] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.912489] Call Trace: [ 22.912852] <TASK> [ 22.912882] dump_stack_lvl+0x73/0xb0 [ 22.912918] print_report+0xd1/0x650 [ 22.912942] ? __virt_addr_valid+0x1db/0x2d0 [ 22.913191] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.913216] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.913257] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.913279] kasan_report+0x141/0x180 [ 22.913301] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.913326] __asan_report_load1_noabort+0x18/0x20 [ 22.913349] kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.913371] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 22.913392] ? finish_task_switch.isra.0+0x153/0x700 [ 22.913415] ? __switch_to+0x47/0xf50 [ 22.913444] ? __pfx_read_tsc+0x10/0x10 [ 22.913466] ? ktime_get_ts64+0x86/0x230 [ 22.913492] kunit_try_run_case+0x1a5/0x480 [ 22.913518] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.913539] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.913566] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.913590] ? __kthread_parkme+0x82/0x180 [ 22.913610] ? preempt_count_sub+0x50/0x80 [ 22.913636] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.913659] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.913681] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.913705] kthread+0x337/0x6f0 [ 22.913723] ? trace_preempt_on+0x20/0xc0 [ 22.913748] ? __pfx_kthread+0x10/0x10 [ 22.913773] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.913973] ? calculate_sigpending+0x7b/0xa0 [ 22.914001] ? __pfx_kthread+0x10/0x10 [ 22.914023] ret_from_fork+0x116/0x1d0 [ 22.914042] ? __pfx_kthread+0x10/0x10 [ 22.914062] ret_from_fork_asm+0x1a/0x30 [ 22.914093] </TASK> [ 22.914106] [ 22.924774] Allocated by task 242: [ 22.925296] kasan_save_stack+0x45/0x70 [ 22.925638] kasan_save_track+0x18/0x40 [ 22.925879] kasan_save_alloc_info+0x3b/0x50 [ 22.926211] __kasan_slab_alloc+0x91/0xa0 [ 22.926411] kmem_cache_alloc_noprof+0x123/0x3f0 [ 22.926622] kmem_cache_rcu_uaf+0x155/0x510 [ 22.926814] kunit_try_run_case+0x1a5/0x480 [ 22.927002] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.927327] kthread+0x337/0x6f0 [ 22.927454] ret_from_fork+0x116/0x1d0 [ 22.927624] ret_from_fork_asm+0x1a/0x30 [ 22.927812] [ 22.928065] Freed by task 0: [ 22.928260] kasan_save_stack+0x45/0x70 [ 22.928469] kasan_save_track+0x18/0x40 [ 22.928622] kasan_save_free_info+0x3f/0x60 [ 22.928781] __kasan_slab_free+0x56/0x70 [ 22.929260] slab_free_after_rcu_debug+0xe4/0x310 [ 22.929508] rcu_core+0x66f/0x1c40 [ 22.929695] rcu_core_si+0x12/0x20 [ 22.929958] handle_softirqs+0x209/0x730 [ 22.930172] __irq_exit_rcu+0xc9/0x110 [ 22.930332] irq_exit_rcu+0x12/0x20 [ 22.930451] sysvec_apic_timer_interrupt+0x81/0x90 [ 22.930670] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 22.930904] [ 22.930972] Last potentially related work creation: [ 22.931198] kasan_save_stack+0x45/0x70 [ 22.931396] kasan_record_aux_stack+0xb2/0xc0 [ 22.931742] kmem_cache_free+0x131/0x420 [ 22.931904] kmem_cache_rcu_uaf+0x194/0x510 [ 22.932185] kunit_try_run_case+0x1a5/0x480 [ 22.932336] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.932681] kthread+0x337/0x6f0 [ 22.933141] ret_from_fork+0x116/0x1d0 [ 22.933468] ret_from_fork_asm+0x1a/0x30 [ 22.933652] [ 22.933746] The buggy address belongs to the object at ffff888102d58000 [ 22.933746] which belongs to the cache test_cache of size 200 [ 22.934298] The buggy address is located 0 bytes inside of [ 22.934298] freed 200-byte region [ffff888102d58000, ffff888102d580c8) [ 22.935039] [ 22.935133] The buggy address belongs to the physical page: [ 22.935476] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102d58 [ 22.935752] flags: 0x200000000000000(node=0|zone=2) [ 22.935992] page_type: f5(slab) [ 22.936206] raw: 0200000000000000 ffff8881015d98c0 dead000000000122 0000000000000000 [ 22.936561] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 22.936901] page dumped because: kasan: bad access detected [ 22.937066] [ 22.937176] Memory state around the buggy address: [ 22.937415] ffff888102d57f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 22.938163] ffff888102d57f80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 22.938488] >ffff888102d58000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.938764] ^ [ 22.938948] ffff888102d58080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 22.939336] ffff888102d58100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.939914] ==================================================================