Date
July 1, 2025, 3:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.189917] ================================================================== [ 18.190034] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 18.190111] Read of size 1 at addr fff00000c57df000 by task kunit_try_catch/214 [ 18.190165] [ 18.190206] CPU: 1 UID: 0 PID: 214 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.190295] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.190323] Hardware name: linux,dummy-virt (DT) [ 18.190361] Call trace: [ 18.190386] show_stack+0x20/0x38 (C) [ 18.190441] dump_stack_lvl+0x8c/0xd0 [ 18.190494] print_report+0x118/0x608 [ 18.190542] kasan_report+0xdc/0x128 [ 18.190602] __asan_report_load1_noabort+0x20/0x30 [ 18.190655] kmem_cache_rcu_uaf+0x388/0x468 [ 18.190702] kunit_try_run_case+0x170/0x3f0 [ 18.190752] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.190807] kthread+0x328/0x630 [ 18.190852] ret_from_fork+0x10/0x20 [ 18.190903] [ 18.190921] Allocated by task 214: [ 18.190952] kasan_save_stack+0x3c/0x68 [ 18.190994] kasan_save_track+0x20/0x40 [ 18.191032] kasan_save_alloc_info+0x40/0x58 [ 18.191071] __kasan_slab_alloc+0xa8/0xb0 [ 18.191110] kmem_cache_alloc_noprof+0x10c/0x398 [ 18.191150] kmem_cache_rcu_uaf+0x12c/0x468 [ 18.191193] kunit_try_run_case+0x170/0x3f0 [ 18.191232] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.191276] kthread+0x328/0x630 [ 18.191311] ret_from_fork+0x10/0x20 [ 18.191346] [ 18.191366] Freed by task 0: [ 18.191393] kasan_save_stack+0x3c/0x68 [ 18.191430] kasan_save_track+0x20/0x40 [ 18.191468] kasan_save_free_info+0x4c/0x78 [ 18.191508] __kasan_slab_free+0x6c/0x98 [ 18.191544] slab_free_after_rcu_debug+0xd4/0x2f8 [ 18.191594] rcu_core+0x9f4/0x1e20 [ 18.191632] rcu_core_si+0x18/0x30 [ 18.191665] handle_softirqs+0x374/0xb28 [ 18.191703] __do_softirq+0x1c/0x28 [ 18.191735] [ 18.191754] Last potentially related work creation: [ 18.191781] kasan_save_stack+0x3c/0x68 [ 18.191819] kasan_record_aux_stack+0xb4/0xc8 [ 18.191861] kmem_cache_free+0x120/0x468 [ 18.191897] kmem_cache_rcu_uaf+0x16c/0x468 [ 18.191935] kunit_try_run_case+0x170/0x3f0 [ 18.191972] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.192016] kthread+0x328/0x630 [ 18.192048] ret_from_fork+0x10/0x20 [ 18.192084] [ 18.192103] The buggy address belongs to the object at fff00000c57df000 [ 18.192103] which belongs to the cache test_cache of size 200 [ 18.192164] The buggy address is located 0 bytes inside of [ 18.192164] freed 200-byte region [fff00000c57df000, fff00000c57df0c8) [ 18.192229] [ 18.192252] The buggy address belongs to the physical page: [ 18.192285] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057df [ 18.192346] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.192402] page_type: f5(slab) [ 18.192446] raw: 0bfffe0000000000 fff00000c57d53c0 dead000000000122 0000000000000000 [ 18.192499] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 18.192542] page dumped because: kasan: bad access detected [ 18.192583] [ 18.192601] Memory state around the buggy address: [ 18.192637] fff00000c57def00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.192681] fff00000c57def80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.192725] >fff00000c57df000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.192765] ^ [ 18.192793] fff00000c57df080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 18.192837] fff00000c57df100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.192877] ==================================================================
[ 12.409965] ================================================================== [ 12.410792] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.412272] Read of size 1 at addr ffff8881033b9000 by task kunit_try_catch/230 [ 12.412599] [ 12.413190] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 12.413245] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.413258] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.413280] Call Trace: [ 12.413294] <TASK> [ 12.413315] dump_stack_lvl+0x73/0xb0 [ 12.413350] print_report+0xd1/0x650 [ 12.413374] ? __virt_addr_valid+0x1db/0x2d0 [ 12.413399] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.413421] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.413442] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.413464] kasan_report+0x141/0x180 [ 12.413484] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.413510] __asan_report_load1_noabort+0x18/0x20 [ 12.413533] kmem_cache_rcu_uaf+0x3e3/0x510 [ 12.413554] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.413575] ? finish_task_switch.isra.0+0x153/0x700 [ 12.413597] ? __switch_to+0x47/0xf50 [ 12.413626] ? __pfx_read_tsc+0x10/0x10 [ 12.413646] ? ktime_get_ts64+0x86/0x230 [ 12.413670] kunit_try_run_case+0x1a5/0x480 [ 12.413710] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.413731] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.413754] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.413775] ? __kthread_parkme+0x82/0x180 [ 12.413795] ? preempt_count_sub+0x50/0x80 [ 12.413816] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.413838] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.413859] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.413880] kthread+0x337/0x6f0 [ 12.413898] ? trace_preempt_on+0x20/0xc0 [ 12.413921] ? __pfx_kthread+0x10/0x10 [ 12.413940] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.413959] ? calculate_sigpending+0x7b/0xa0 [ 12.413982] ? __pfx_kthread+0x10/0x10 [ 12.414002] ret_from_fork+0x116/0x1d0 [ 12.414018] ? __pfx_kthread+0x10/0x10 [ 12.414049] ret_from_fork_asm+0x1a/0x30 [ 12.414322] </TASK> [ 12.414337] [ 12.427995] Allocated by task 230: [ 12.428877] kasan_save_stack+0x45/0x70 [ 12.429261] kasan_save_track+0x18/0x40 [ 12.429402] kasan_save_alloc_info+0x3b/0x50 [ 12.429547] __kasan_slab_alloc+0x91/0xa0 [ 12.430205] kmem_cache_alloc_noprof+0x123/0x3f0 [ 12.430809] kmem_cache_rcu_uaf+0x155/0x510 [ 12.431453] kunit_try_run_case+0x1a5/0x480 [ 12.432088] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.432591] kthread+0x337/0x6f0 [ 12.433014] ret_from_fork+0x116/0x1d0 [ 12.433336] ret_from_fork_asm+0x1a/0x30 [ 12.433479] [ 12.433551] Freed by task 0: [ 12.434050] kasan_save_stack+0x45/0x70 [ 12.434504] kasan_save_track+0x18/0x40 [ 12.434919] kasan_save_free_info+0x3f/0x60 [ 12.435540] __kasan_slab_free+0x56/0x70 [ 12.435831] slab_free_after_rcu_debug+0xe4/0x310 [ 12.435995] rcu_core+0x66f/0x1c40 [ 12.436135] rcu_core_si+0x12/0x20 [ 12.436264] handle_softirqs+0x209/0x730 [ 12.436405] __irq_exit_rcu+0xc9/0x110 [ 12.436535] irq_exit_rcu+0x12/0x20 [ 12.436676] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.436836] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.437290] [ 12.437461] Last potentially related work creation: [ 12.437637] kasan_save_stack+0x45/0x70 [ 12.438206] kasan_record_aux_stack+0xb2/0xc0 [ 12.438695] kmem_cache_free+0x131/0x420 [ 12.438926] kmem_cache_rcu_uaf+0x194/0x510 [ 12.439087] kunit_try_run_case+0x1a5/0x480 [ 12.439234] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.439406] kthread+0x337/0x6f0 [ 12.439525] ret_from_fork+0x116/0x1d0 [ 12.439730] ret_from_fork_asm+0x1a/0x30 [ 12.440088] [ 12.440252] The buggy address belongs to the object at ffff8881033b9000 [ 12.440252] which belongs to the cache test_cache of size 200 [ 12.441484] The buggy address is located 0 bytes inside of [ 12.441484] freed 200-byte region [ffff8881033b9000, ffff8881033b90c8) [ 12.442775] [ 12.443055] The buggy address belongs to the physical page: [ 12.443535] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1033b9 [ 12.444110] flags: 0x200000000000000(node=0|zone=2) [ 12.444285] page_type: f5(slab) [ 12.444411] raw: 0200000000000000 ffff8881033b6000 dead000000000122 0000000000000000 [ 12.444641] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 12.445311] page dumped because: kasan: bad access detected [ 12.445800] [ 12.446136] Memory state around the buggy address: [ 12.446555] ffff8881033b8f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.447274] ffff8881033b8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.448087] >ffff8881033b9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.448312] ^ [ 12.448428] ffff8881033b9080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.448684] ffff8881033b9100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.449390] ==================================================================