Date
May 23, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.225250] ================================================================== [ 29.225479] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 29.225667] Read of size 1 at addr fff00000c777f000 by task kunit_try_catch/215 [ 29.227462] [ 29.227581] CPU: 0 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT [ 29.227760] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.227800] Hardware name: linux,dummy-virt (DT) [ 29.227851] Call trace: [ 29.227887] show_stack+0x20/0x38 (C) [ 29.228079] dump_stack_lvl+0x8c/0xd0 [ 29.228214] print_report+0x118/0x608 [ 29.228351] kasan_report+0xdc/0x128 [ 29.228476] __asan_report_load1_noabort+0x20/0x30 [ 29.228611] kmem_cache_rcu_uaf+0x388/0x468 [ 29.228730] kunit_try_run_case+0x170/0x3f0 [ 29.228859] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.229081] kthread+0x328/0x630 [ 29.229246] ret_from_fork+0x10/0x20 [ 29.229403] [ 29.229487] Allocated by task 215: [ 29.229619] kasan_save_stack+0x3c/0x68 [ 29.229781] kasan_save_track+0x20/0x40 [ 29.229907] kasan_save_alloc_info+0x40/0x58 [ 29.230035] __kasan_slab_alloc+0xa8/0xb0 [ 29.230195] kmem_cache_alloc_noprof+0x10c/0x3a0 [ 29.230320] kmem_cache_rcu_uaf+0x12c/0x468 [ 29.230439] kunit_try_run_case+0x170/0x3f0 [ 29.230574] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.230709] kthread+0x328/0x630 [ 29.230820] ret_from_fork+0x10/0x20 [ 29.230924] [ 29.230982] Freed by task 0: [ 29.231057] kasan_save_stack+0x3c/0x68 [ 29.231162] kasan_save_track+0x20/0x40 [ 29.231269] kasan_save_free_info+0x4c/0x78 [ 29.231391] __kasan_slab_free+0x6c/0x98 [ 29.231508] slab_free_after_rcu_debug+0xd4/0x2f8 [ 29.231616] rcu_core+0x9f4/0x1e20 [ 29.231760] rcu_core_si+0x18/0x30 [ 29.231914] handle_softirqs+0x374/0xb28 [ 29.232042] __do_softirq+0x1c/0x28 [ 29.232137] [ 29.232191] Last potentially related work creation: [ 29.232273] kasan_save_stack+0x3c/0x68 [ 29.232384] kasan_record_aux_stack+0xb4/0xc8 [ 29.232528] kmem_cache_free+0x120/0x470 [ 29.232679] kmem_cache_rcu_uaf+0x16c/0x468 [ 29.232803] kunit_try_run_case+0x170/0x3f0 [ 29.233003] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.233216] kthread+0x328/0x630 [ 29.233328] ret_from_fork+0x10/0x20 [ 29.233431] [ 29.233491] The buggy address belongs to the object at fff00000c777f000 [ 29.233491] which belongs to the cache test_cache of size 200 [ 29.233636] The buggy address is located 0 bytes inside of [ 29.233636] freed 200-byte region [fff00000c777f000, fff00000c777f0c8) [ 29.233793] [ 29.233851] The buggy address belongs to the physical page: [ 29.233944] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10777f [ 29.234111] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.234261] page_type: f5(slab) [ 29.234373] raw: 0bfffe0000000000 fff00000c11fd780 dead000000000122 0000000000000000 [ 29.234543] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 29.234686] page dumped because: kasan: bad access detected [ 29.234769] [ 29.234863] Memory state around the buggy address: [ 29.234973] fff00000c777ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.235106] fff00000c777ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.235294] >fff00000c777f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.235478] ^ [ 29.235604] fff00000c777f080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.235792] fff00000c777f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.235910] ==================================================================
[ 13.440367] ================================================================== [ 13.440863] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.441595] Read of size 1 at addr ffff88810270d000 by task kunit_try_catch/232 [ 13.442597] [ 13.442838] CPU: 0 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT(voluntary) [ 13.442888] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.442900] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.442922] Call Trace: [ 13.442937] <TASK> [ 13.442956] dump_stack_lvl+0x73/0xb0 [ 13.442989] print_report+0xd1/0x650 [ 13.443013] ? __virt_addr_valid+0x1db/0x2d0 [ 13.443038] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.443059] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.443083] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.443104] kasan_report+0x141/0x180 [ 13.443128] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.443154] __asan_report_load1_noabort+0x18/0x20 [ 13.443176] kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.443197] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 13.443218] ? finish_task_switch.isra.0+0x153/0x700 [ 13.443244] ? __switch_to+0x5d9/0xf60 [ 13.443266] ? dequeue_task_fair+0x166/0x4e0 [ 13.443306] ? __pfx_read_tsc+0x10/0x10 [ 13.443329] ? ktime_get_ts64+0x86/0x230 [ 13.443356] kunit_try_run_case+0x1a5/0x480 [ 13.443382] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.443406] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.443444] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.443468] ? __kthread_parkme+0x82/0x180 [ 13.443491] ? preempt_count_sub+0x50/0x80 [ 13.443517] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.443541] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.443564] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.443588] kthread+0x337/0x6f0 [ 13.443606] ? trace_preempt_on+0x20/0xc0 [ 13.443631] ? __pfx_kthread+0x10/0x10 [ 13.443650] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.443672] ? calculate_sigpending+0x7b/0xa0 [ 13.443695] ? __pfx_kthread+0x10/0x10 [ 13.443715] ret_from_fork+0x41/0x80 [ 13.443736] ? __pfx_kthread+0x10/0x10 [ 13.443755] ret_from_fork_asm+0x1a/0x30 [ 13.443789] </TASK> [ 13.443801] [ 13.454108] Allocated by task 232: [ 13.454350] kasan_save_stack+0x45/0x70 [ 13.454501] kasan_save_track+0x18/0x40 [ 13.454762] kasan_save_alloc_info+0x3b/0x50 [ 13.454984] __kasan_slab_alloc+0x91/0xa0 [ 13.455169] kmem_cache_alloc_noprof+0x123/0x3f0 [ 13.455390] kmem_cache_rcu_uaf+0x155/0x510 [ 13.455535] kunit_try_run_case+0x1a5/0x480 [ 13.455724] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.456021] kthread+0x337/0x6f0 [ 13.456215] ret_from_fork+0x41/0x80 [ 13.456358] ret_from_fork_asm+0x1a/0x30 [ 13.456582] [ 13.456678] Freed by task 0: [ 13.456894] kasan_save_stack+0x45/0x70 [ 13.457374] kasan_save_track+0x18/0x40 [ 13.457562] kasan_save_free_info+0x3f/0x60 [ 13.458317] __kasan_slab_free+0x56/0x70 [ 13.458581] slab_free_after_rcu_debug+0xe4/0x310 [ 13.458933] rcu_core+0x66c/0x1c30 [ 13.459098] rcu_core_si+0x12/0x20 [ 13.459275] handle_softirqs+0x209/0x730 [ 13.459472] __irq_exit_rcu+0xc9/0x110 [ 13.460200] irq_exit_rcu+0x12/0x20 [ 13.460346] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.460902] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.461284] [ 13.461374] Last potentially related work creation: [ 13.461764] kasan_save_stack+0x45/0x70 [ 13.462066] kasan_record_aux_stack+0xb2/0xc0 [ 13.462519] kmem_cache_free+0x131/0x420 [ 13.462747] kmem_cache_rcu_uaf+0x194/0x510 [ 13.462979] kunit_try_run_case+0x1a5/0x480 [ 13.463287] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.463740] kthread+0x337/0x6f0 [ 13.464009] ret_from_fork+0x41/0x80 [ 13.464335] ret_from_fork_asm+0x1a/0x30 [ 13.464579] [ 13.464893] The buggy address belongs to the object at ffff88810270d000 [ 13.464893] which belongs to the cache test_cache of size 200 [ 13.465421] The buggy address is located 0 bytes inside of [ 13.465421] freed 200-byte region [ffff88810270d000, ffff88810270d0c8) [ 13.465957] [ 13.466099] The buggy address belongs to the physical page: [ 13.466400] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10270d [ 13.466772] flags: 0x200000000000000(node=0|zone=2) [ 13.466975] page_type: f5(slab) [ 13.467473] raw: 0200000000000000 ffff888102707280 dead000000000122 0000000000000000 [ 13.467759] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 13.468085] page dumped because: kasan: bad access detected [ 13.468335] [ 13.468612] Memory state around the buggy address: [ 13.468906] ffff88810270cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.469322] ffff88810270cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.469699] >ffff88810270d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.470118] ^ [ 13.470291] ffff88810270d080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 13.470759] ffff88810270d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.471085] ==================================================================