Date
July 18, 2025, 1:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.125980] ================================================================== [ 32.126060] BUG: KASAN: double-free in kmem_cache_double_free+0x190/0x3c8 [ 32.126144] Free of addr fff00000c3f1d000 by task kunit_try_catch/240 [ 32.126189] [ 32.126231] CPU: 0 UID: 0 PID: 240 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT [ 32.126703] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.126736] Hardware name: linux,dummy-virt (DT) [ 32.126839] Call trace: [ 32.126866] show_stack+0x20/0x38 (C) [ 32.126918] dump_stack_lvl+0x8c/0xd0 [ 32.126997] print_report+0x118/0x5e8 [ 32.127041] kasan_report_invalid_free+0xc0/0xe8 [ 32.127109] check_slab_allocation+0xd4/0x108 [ 32.127154] __kasan_slab_pre_free+0x2c/0x48 [ 32.127198] kmem_cache_free+0xf0/0x468 [ 32.127245] kmem_cache_double_free+0x190/0x3c8 [ 32.127295] kunit_try_run_case+0x170/0x3f0 [ 32.127344] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.127395] kthread+0x328/0x630 [ 32.127598] ret_from_fork+0x10/0x20 [ 32.127649] [ 32.127697] Allocated by task 240: [ 32.127727] kasan_save_stack+0x3c/0x68 [ 32.127804] kasan_save_track+0x20/0x40 [ 32.127872] kasan_save_alloc_info+0x40/0x58 [ 32.127993] __kasan_slab_alloc+0xa8/0xb0 [ 32.128057] kmem_cache_alloc_noprof+0x10c/0x398 [ 32.128105] kmem_cache_double_free+0x12c/0x3c8 [ 32.128145] kunit_try_run_case+0x170/0x3f0 [ 32.128181] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.128224] kthread+0x328/0x630 [ 32.128255] ret_from_fork+0x10/0x20 [ 32.128537] [ 32.128583] Freed by task 240: [ 32.128641] kasan_save_stack+0x3c/0x68 [ 32.128714] kasan_save_track+0x20/0x40 [ 32.128816] kasan_save_free_info+0x4c/0x78 [ 32.128902] __kasan_slab_free+0x6c/0x98 [ 32.128979] kmem_cache_free+0x260/0x468 [ 32.129040] kmem_cache_double_free+0x140/0x3c8 [ 32.129107] kunit_try_run_case+0x170/0x3f0 [ 32.129161] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.129316] kthread+0x328/0x630 [ 32.129349] ret_from_fork+0x10/0x20 [ 32.129384] [ 32.129404] The buggy address belongs to the object at fff00000c3f1d000 [ 32.129404] which belongs to the cache test_cache of size 200 [ 32.129491] The buggy address is located 0 bytes inside of [ 32.129491] 200-byte region [fff00000c3f1d000, fff00000c3f1d0c8) [ 32.129578] [ 32.129599] The buggy address belongs to the physical page: [ 32.129863] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f1d [ 32.129964] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.130057] page_type: f5(slab) [ 32.130174] raw: 0bfffe0000000000 fff00000ffec6f00 dead000000000122 0000000000000000 [ 32.130251] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 32.130326] page dumped because: kasan: bad access detected [ 32.130357] [ 32.130373] Memory state around the buggy address: [ 32.130695] fff00000c3f1cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.130749] fff00000c3f1cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.130835] >fff00000c3f1d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.130911] ^ [ 32.130996] fff00000c3f1d080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.131117] fff00000c3f1d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.131179] ==================================================================
[ 25.536611] ================================================================== [ 25.537773] BUG: KASAN: double-free in kmem_cache_double_free+0x1e5/0x480 [ 25.538807] Free of addr ffff888102b09000 by task kunit_try_catch/257 [ 25.539416] [ 25.539728] CPU: 1 UID: 0 PID: 257 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT(voluntary) [ 25.539785] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.539798] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.539821] Call Trace: [ 25.539942] <TASK> [ 25.539968] dump_stack_lvl+0x73/0xb0 [ 25.540006] print_report+0xd1/0x640 [ 25.540030] ? __virt_addr_valid+0x1db/0x2d0 [ 25.540056] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.540092] ? kmem_cache_double_free+0x1e5/0x480 [ 25.540117] kasan_report_invalid_free+0x10a/0x130 [ 25.540140] ? kmem_cache_double_free+0x1e5/0x480 [ 25.540165] ? kmem_cache_double_free+0x1e5/0x480 [ 25.540187] check_slab_allocation+0x101/0x130 [ 25.540208] __kasan_slab_pre_free+0x28/0x40 [ 25.540237] kmem_cache_free+0xed/0x420 [ 25.540256] ? kmem_cache_alloc_noprof+0x123/0x3f0 [ 25.540280] ? kmem_cache_double_free+0x1e5/0x480 [ 25.540306] kmem_cache_double_free+0x1e5/0x480 [ 25.540328] ? __pfx_kmem_cache_double_free+0x10/0x10 [ 25.540351] ? finish_task_switch.isra.0+0x153/0x700 [ 25.540373] ? __switch_to+0x47/0xf80 [ 25.540402] ? __pfx_read_tsc+0x10/0x10 [ 25.540423] ? ktime_get_ts64+0x86/0x230 [ 25.540448] kunit_try_run_case+0x1a5/0x480 [ 25.540473] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.540494] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.540528] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.540560] ? __kthread_parkme+0x82/0x180 [ 25.540579] ? preempt_count_sub+0x50/0x80 [ 25.540603] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.540625] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.540648] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.540670] kthread+0x337/0x6f0 [ 25.540689] ? trace_preempt_on+0x20/0xc0 [ 25.540713] ? __pfx_kthread+0x10/0x10 [ 25.540732] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.540761] ? calculate_sigpending+0x7b/0xa0 [ 25.540785] ? __pfx_kthread+0x10/0x10 [ 25.540841] ret_from_fork+0x116/0x1d0 [ 25.540860] ? __pfx_kthread+0x10/0x10 [ 25.540879] ret_from_fork_asm+0x1a/0x30 [ 25.540910] </TASK> [ 25.540922] [ 25.556382] Allocated by task 257: [ 25.556513] kasan_save_stack+0x45/0x70 [ 25.556656] kasan_save_track+0x18/0x40 [ 25.556780] kasan_save_alloc_info+0x3b/0x50 [ 25.556916] __kasan_slab_alloc+0x91/0xa0 [ 25.557042] kmem_cache_alloc_noprof+0x123/0x3f0 [ 25.557189] kmem_cache_double_free+0x14f/0x480 [ 25.557340] kunit_try_run_case+0x1a5/0x480 [ 25.557476] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.557637] kthread+0x337/0x6f0 [ 25.557747] ret_from_fork+0x116/0x1d0 [ 25.557867] ret_from_fork_asm+0x1a/0x30 [ 25.557994] [ 25.558054] Freed by task 257: [ 25.558153] kasan_save_stack+0x45/0x70 [ 25.558403] kasan_save_track+0x18/0x40 [ 25.558737] kasan_save_free_info+0x3f/0x60 [ 25.559093] __kasan_slab_free+0x56/0x70 [ 25.559508] kmem_cache_free+0x249/0x420 [ 25.559850] kmem_cache_double_free+0x16a/0x480 [ 25.560244] kunit_try_run_case+0x1a5/0x480 [ 25.561047] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.561701] kthread+0x337/0x6f0 [ 25.562328] ret_from_fork+0x116/0x1d0 [ 25.562796] ret_from_fork_asm+0x1a/0x30 [ 25.563321] [ 25.563616] The buggy address belongs to the object at ffff888102b09000 [ 25.563616] which belongs to the cache test_cache of size 200 [ 25.565053] The buggy address is located 0 bytes inside of [ 25.565053] 200-byte region [ffff888102b09000, ffff888102b090c8) [ 25.566528] [ 25.566859] The buggy address belongs to the physical page: [ 25.567586] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b09 [ 25.568569] flags: 0x200000000000000(node=0|zone=2) [ 25.569268] page_type: f5(slab) [ 25.569757] raw: 0200000000000000 ffff8881012b1640 dead000000000122 0000000000000000 [ 25.570692] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 25.571701] page dumped because: kasan: bad access detected [ 25.572541] [ 25.572743] Memory state around the buggy address: [ 25.573355] ffff888102b08f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.574210] ffff888102b08f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.574738] >ffff888102b09000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.575219] ^ [ 25.575346] ffff888102b09080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.575554] ffff888102b09100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.575759] ==================================================================