Date
July 22, 2025, 2:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.955580] ================================================================== [ 17.955675] BUG: KASAN: double-free in kmem_cache_double_free+0x190/0x3c8 [ 17.955750] Free of addr fff00000c6fac000 by task kunit_try_catch/211 [ 17.955794] [ 17.955869] CPU: 0 UID: 0 PID: 211 Comm: kunit_try_catch Tainted: G B N 6.15.8-rc1 #1 PREEMPT [ 17.955955] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.955982] Hardware name: linux,dummy-virt (DT) [ 17.956022] Call trace: [ 17.956066] show_stack+0x20/0x38 (C) [ 17.956117] dump_stack_lvl+0x8c/0xd0 [ 17.956169] print_report+0x118/0x5d0 [ 17.956229] kasan_report_invalid_free+0xc0/0xe8 [ 17.956276] check_slab_allocation+0xd4/0x108 [ 17.956339] __kasan_slab_pre_free+0x2c/0x48 [ 17.956384] kmem_cache_free+0xf0/0x468 [ 17.956430] kmem_cache_double_free+0x190/0x3c8 [ 17.956477] kunit_try_run_case+0x170/0x3f0 [ 17.956528] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.956578] kthread+0x328/0x630 [ 17.956623] ret_from_fork+0x10/0x20 [ 17.956672] [ 17.956704] Allocated by task 211: [ 17.956734] kasan_save_stack+0x3c/0x68 [ 17.956771] kasan_save_track+0x20/0x40 [ 17.956807] kasan_save_alloc_info+0x40/0x58 [ 17.956844] __kasan_slab_alloc+0xa8/0xb0 [ 17.956881] kmem_cache_alloc_noprof+0x10c/0x398 [ 17.956917] kmem_cache_double_free+0x12c/0x3c8 [ 17.956967] kunit_try_run_case+0x170/0x3f0 [ 17.957004] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.957043] kthread+0x328/0x630 [ 17.957086] ret_from_fork+0x10/0x20 [ 17.957121] [ 17.957147] Freed by task 211: [ 17.957177] kasan_save_stack+0x3c/0x68 [ 17.957212] kasan_save_track+0x20/0x40 [ 17.957247] kasan_save_free_info+0x4c/0x78 [ 17.957293] __kasan_slab_free+0x6c/0x98 [ 17.957328] kmem_cache_free+0x260/0x468 [ 17.957361] kmem_cache_double_free+0x140/0x3c8 [ 17.957430] kunit_try_run_case+0x170/0x3f0 [ 17.957483] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.957536] kthread+0x328/0x630 [ 17.957585] ret_from_fork+0x10/0x20 [ 17.957705] [ 17.957730] The buggy address belongs to the object at fff00000c6fac000 [ 17.957730] which belongs to the cache test_cache of size 200 [ 17.957949] The buggy address is located 0 bytes inside of [ 17.957949] 200-byte region [fff00000c6fac000, fff00000c6fac0c8) [ 17.958014] [ 17.958035] The buggy address belongs to the physical page: [ 17.958066] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106fac [ 17.958145] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.958199] page_type: f5(slab) [ 17.958340] raw: 0bfffe0000000000 fff00000c1bdf500 dead000000000122 0000000000000000 [ 17.958444] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 17.958492] page dumped because: kasan: bad access detected [ 17.958540] [ 17.958579] Memory state around the buggy address: [ 17.958632] fff00000c6fabf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 17.958675] fff00000c6fabf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 17.958746] >fff00000c6fac000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.958806] ^ [ 17.958835] fff00000c6fac080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 17.958876] fff00000c6fac100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.958915] ==================================================================
[ 11.809200] ================================================================== [ 11.810168] BUG: KASAN: double-free in kmem_cache_double_free+0x1e5/0x480 [ 11.810442] Free of addr ffff888103cf7000 by task kunit_try_catch/229 [ 11.811173] [ 11.811296] CPU: 0 UID: 0 PID: 229 Comm: kunit_try_catch Tainted: G B N 6.15.8-rc1 #1 PREEMPT(voluntary) [ 11.811379] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.811390] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.811438] Call Trace: [ 11.811452] <TASK> [ 11.811473] dump_stack_lvl+0x73/0xb0 [ 11.811503] print_report+0xd1/0x610 [ 11.811526] ? __virt_addr_valid+0x1db/0x2d0 [ 11.811550] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.811572] ? kmem_cache_double_free+0x1e5/0x480 [ 11.811593] kasan_report_invalid_free+0x10a/0x130 [ 11.811617] ? kmem_cache_double_free+0x1e5/0x480 [ 11.811639] ? kmem_cache_double_free+0x1e5/0x480 [ 11.811660] check_slab_allocation+0x101/0x130 [ 11.811733] __kasan_slab_pre_free+0x28/0x40 [ 11.811758] kmem_cache_free+0xed/0x420 [ 11.811779] ? kmem_cache_alloc_noprof+0x123/0x3f0 [ 11.811799] ? kmem_cache_double_free+0x1e5/0x480 [ 11.811822] kmem_cache_double_free+0x1e5/0x480 [ 11.811843] ? __pfx_kmem_cache_double_free+0x10/0x10 [ 11.811862] ? finish_task_switch.isra.0+0x153/0x700 [ 11.811886] ? __switch_to+0x5d9/0xf60 [ 11.811906] ? dequeue_task_fair+0x166/0x4e0 [ 11.811933] ? __pfx_read_tsc+0x10/0x10 [ 11.811953] ? ktime_get_ts64+0x86/0x230 [ 11.811978] kunit_try_run_case+0x1a5/0x480 [ 11.812000] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.812018] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.812039] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.812063] ? __kthread_parkme+0x82/0x180 [ 11.812085] ? preempt_count_sub+0x50/0x80 [ 11.812108] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.812127] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.812149] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.812171] kthread+0x337/0x6f0 [ 11.812188] ? trace_preempt_on+0x20/0xc0 [ 11.812211] ? __pfx_kthread+0x10/0x10 [ 11.812243] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.812265] ? calculate_sigpending+0x7b/0xa0 [ 11.812286] ? __pfx_kthread+0x10/0x10 [ 11.812304] ret_from_fork+0x41/0x80 [ 11.812325] ? __pfx_kthread+0x10/0x10 [ 11.812342] ret_from_fork_asm+0x1a/0x30 [ 11.812385] </TASK> [ 11.812396] [ 11.824375] Allocated by task 229: [ 11.824518] kasan_save_stack+0x45/0x70 [ 11.824666] kasan_save_track+0x18/0x40 [ 11.824798] kasan_save_alloc_info+0x3b/0x50 [ 11.824943] __kasan_slab_alloc+0x91/0xa0 [ 11.825078] kmem_cache_alloc_noprof+0x123/0x3f0 [ 11.825236] kmem_cache_double_free+0x14f/0x480 [ 11.825380] kunit_try_run_case+0x1a5/0x480 [ 11.825518] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.825684] kthread+0x337/0x6f0 [ 11.825796] ret_from_fork+0x41/0x80 [ 11.825920] ret_from_fork_asm+0x1a/0x30 [ 11.826052] [ 11.826120] Freed by task 229: [ 11.826936] kasan_save_stack+0x45/0x70 [ 11.827504] kasan_save_track+0x18/0x40 [ 11.828157] kasan_save_free_info+0x3f/0x60 [ 11.828847] __kasan_slab_free+0x56/0x70 [ 11.829486] kmem_cache_free+0x249/0x420 [ 11.830099] kmem_cache_double_free+0x16a/0x480 [ 11.830770] kunit_try_run_case+0x1a5/0x480 [ 11.831407] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.832269] kthread+0x337/0x6f0 [ 11.832802] ret_from_fork+0x41/0x80 [ 11.833314] ret_from_fork_asm+0x1a/0x30 [ 11.833942] [ 11.834279] The buggy address belongs to the object at ffff888103cf7000 [ 11.834279] which belongs to the cache test_cache of size 200 [ 11.835883] The buggy address is located 0 bytes inside of [ 11.835883] 200-byte region [ffff888103cf7000, ffff888103cf70c8) [ 11.837373] [ 11.837799] The buggy address belongs to the physical page: [ 11.838720] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103cf7 [ 11.839891] flags: 0x200000000000000(node=0|zone=2) [ 11.840797] page_type: f5(slab) [ 11.841094] raw: 0200000000000000 ffff8881014e3280 dead000000000122 0000000000000000 [ 11.841346] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 11.841572] page dumped because: kasan: bad access detected [ 11.842079] [ 11.842334] Memory state around the buggy address: [ 11.843061] ffff888103cf6f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.843301] ffff888103cf6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.844349] >ffff888103cf7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.845346] ^ [ 11.845473] ffff888103cf7080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 11.845694] ffff888103cf7100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.846283] ==================================================================