Date
May 26, 2025, 9:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.028059] ================================================================== [ 19.028427] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 19.028604] Read of size 1 at addr fff00000c794e000 by task kunit_try_catch/213 [ 19.028659] [ 19.028705] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7-next-20250526 #1 PREEMPT [ 19.028795] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.028822] Hardware name: linux,dummy-virt (DT) [ 19.028860] Call trace: [ 19.028885] show_stack+0x20/0x38 (C) [ 19.028943] dump_stack_lvl+0x8c/0xd0 [ 19.028995] print_report+0x118/0x608 [ 19.029043] kasan_report+0xdc/0x128 [ 19.029086] __asan_report_load1_noabort+0x20/0x30 [ 19.029136] kmem_cache_rcu_uaf+0x388/0x468 [ 19.029182] kunit_try_run_case+0x170/0x3f0 [ 19.029233] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.029285] kthread+0x328/0x630 [ 19.029339] ret_from_fork+0x10/0x20 [ 19.029396] [ 19.029415] Allocated by task 213: [ 19.029447] kasan_save_stack+0x3c/0x68 [ 19.029492] kasan_save_track+0x20/0x40 [ 19.029530] kasan_save_alloc_info+0x40/0x58 [ 19.029567] __kasan_slab_alloc+0xa8/0xb0 [ 19.029604] kmem_cache_alloc_noprof+0x10c/0x3a0 [ 19.029643] kmem_cache_rcu_uaf+0x12c/0x468 [ 19.029678] kunit_try_run_case+0x170/0x3f0 [ 19.029714] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.029754] kthread+0x328/0x630 [ 19.029785] ret_from_fork+0x10/0x20 [ 19.029820] [ 19.029838] Freed by task 0: [ 19.029864] kasan_save_stack+0x3c/0x68 [ 19.029899] kasan_save_track+0x20/0x40 [ 19.029935] kasan_save_free_info+0x4c/0x78 [ 19.029973] __kasan_slab_free+0x6c/0x98 [ 19.030019] slab_free_after_rcu_debug+0xd4/0x2f8 [ 19.030091] rcu_core+0x9f4/0x1e20 [ 19.030173] rcu_core_si+0x18/0x30 [ 19.030205] handle_softirqs+0x374/0xb28 [ 19.030761] __do_softirq+0x1c/0x28 [ 19.030908] [ 19.030933] Last potentially related work creation: [ 19.030963] kasan_save_stack+0x3c/0x68 [ 19.031011] kasan_record_aux_stack+0xb4/0xc8 [ 19.031060] kmem_cache_free+0x120/0x470 [ 19.031097] kmem_cache_rcu_uaf+0x16c/0x468 [ 19.031134] kunit_try_run_case+0x170/0x3f0 [ 19.031170] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.031211] kthread+0x328/0x630 [ 19.031381] ret_from_fork+0x10/0x20 [ 19.031529] [ 19.031687] The buggy address belongs to the object at fff00000c794e000 [ 19.031687] which belongs to the cache test_cache of size 200 [ 19.032142] The buggy address is located 0 bytes inside of [ 19.032142] freed 200-byte region [fff00000c794e000, fff00000c794e0c8) [ 19.033113] [ 19.033266] The buggy address belongs to the physical page: [ 19.033329] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10794e [ 19.033399] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.033853] page_type: f5(slab) [ 19.034152] raw: 0bfffe0000000000 fff00000c794a140 dead000000000122 0000000000000000 [ 19.034442] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.034590] page dumped because: kasan: bad access detected [ 19.034628] [ 19.034647] Memory state around the buggy address: [ 19.034744] fff00000c794df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.035104] fff00000c794df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.035206] >fff00000c794e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.035247] ^ [ 19.035334] fff00000c794e080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.035381] fff00000c794e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.035422] ==================================================================
[ 11.777347] ================================================================== [ 11.778146] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.778475] Read of size 1 at addr ffff88810397b000 by task kunit_try_catch/231 [ 11.778982] [ 11.779138] CPU: 0 UID: 0 PID: 231 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7-next-20250526 #1 PREEMPT(voluntary) [ 11.779185] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.779197] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.779220] Call Trace: [ 11.779232] <TASK> [ 11.779250] dump_stack_lvl+0x73/0xb0 [ 11.779524] print_report+0xd1/0x650 [ 11.779551] ? __virt_addr_valid+0x1db/0x2d0 [ 11.779577] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.779600] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.779624] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.779663] kasan_report+0x141/0x180 [ 11.779685] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.779713] __asan_report_load1_noabort+0x18/0x20 [ 11.779734] kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.779758] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 11.779780] ? finish_task_switch.isra.0+0x153/0x700 [ 11.779803] ? __switch_to+0x47/0xf50 [ 11.779833] ? __pfx_read_tsc+0x10/0x10 [ 11.779854] ? ktime_get_ts64+0x86/0x230 [ 11.779880] kunit_try_run_case+0x1a5/0x480 [ 11.779908] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.779927] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.779954] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.779979] ? __kthread_parkme+0x82/0x180 [ 11.779999] ? preempt_count_sub+0x50/0x80 [ 11.780021] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.780042] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.780066] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.780090] kthread+0x337/0x6f0 [ 11.780109] ? trace_preempt_on+0x20/0xc0 [ 11.780133] ? __pfx_kthread+0x10/0x10 [ 11.780154] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.780175] ? calculate_sigpending+0x7b/0xa0 [ 11.780199] ? __pfx_kthread+0x10/0x10 [ 11.780221] ret_from_fork+0x116/0x1d0 [ 11.780239] ? __pfx_kthread+0x10/0x10 [ 11.780259] ret_from_fork_asm+0x1a/0x30 [ 11.780290] </TASK> [ 11.780300] [ 11.788959] Allocated by task 231: [ 11.789207] kasan_save_stack+0x45/0x70 [ 11.789478] kasan_save_track+0x18/0x40 [ 11.789800] kasan_save_alloc_info+0x3b/0x50 [ 11.790070] __kasan_slab_alloc+0x91/0xa0 [ 11.790343] kmem_cache_alloc_noprof+0x123/0x3f0 [ 11.790556] kmem_cache_rcu_uaf+0x155/0x510 [ 11.790766] kunit_try_run_case+0x1a5/0x480 [ 11.791170] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.791450] kthread+0x337/0x6f0 [ 11.791724] ret_from_fork+0x116/0x1d0 [ 11.791929] ret_from_fork_asm+0x1a/0x30 [ 11.792337] [ 11.792432] Freed by task 0: [ 11.792586] kasan_save_stack+0x45/0x70 [ 11.792768] kasan_save_track+0x18/0x40 [ 11.793044] kasan_save_free_info+0x3f/0x60 [ 11.793374] __kasan_slab_free+0x56/0x70 [ 11.793634] slab_free_after_rcu_debug+0xe4/0x310 [ 11.793815] rcu_core+0x66f/0x1c40 [ 11.794222] rcu_core_si+0x12/0x20 [ 11.794468] handle_softirqs+0x209/0x730 [ 11.794640] __irq_exit_rcu+0xc9/0x110 [ 11.794863] irq_exit_rcu+0x12/0x20 [ 11.795260] sysvec_apic_timer_interrupt+0x81/0x90 [ 11.795496] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 11.795746] [ 11.795911] Last potentially related work creation: [ 11.796295] kasan_save_stack+0x45/0x70 [ 11.796514] kasan_record_aux_stack+0xb2/0xc0 [ 11.796769] kmem_cache_free+0x131/0x420 [ 11.796955] kmem_cache_rcu_uaf+0x194/0x510 [ 11.797337] kunit_try_run_case+0x1a5/0x480 [ 11.797573] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.797876] kthread+0x337/0x6f0 [ 11.798188] ret_from_fork+0x116/0x1d0 [ 11.798460] ret_from_fork_asm+0x1a/0x30 [ 11.798708] [ 11.798790] The buggy address belongs to the object at ffff88810397b000 [ 11.798790] which belongs to the cache test_cache of size 200 [ 11.799443] The buggy address is located 0 bytes inside of [ 11.799443] freed 200-byte region [ffff88810397b000, ffff88810397b0c8) [ 11.800402] [ 11.800507] The buggy address belongs to the physical page: [ 11.800717] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10397b [ 11.801194] flags: 0x200000000000000(node=0|zone=2) [ 11.801407] page_type: f5(slab) [ 11.801585] raw: 0200000000000000 ffff88810189ca00 dead000000000122 0000000000000000 [ 11.802072] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 11.802467] page dumped because: kasan: bad access detected [ 11.802856] [ 11.803007] Memory state around the buggy address: [ 11.803341] ffff88810397af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.803670] ffff88810397af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.804125] >ffff88810397b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.804457] ^ [ 11.804628] ffff88810397b080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 11.804989] ffff88810397b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.805328] ==================================================================