Date
July 23, 2025, 3:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.710725] ================================================================== [ 31.710807] BUG: KASAN: double-free in kmem_cache_double_free+0x190/0x3c8 [ 31.710883] Free of addr fff00000c9a91000 by task kunit_try_catch/242 [ 31.710942] [ 31.710986] CPU: 0 UID: 0 PID: 242 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250723 #1 PREEMPT [ 31.711080] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 31.711114] Hardware name: linux,dummy-virt (DT) [ 31.711148] Call trace: [ 31.711174] show_stack+0x20/0x38 (C) [ 31.711227] dump_stack_lvl+0x8c/0xd0 [ 31.711276] print_report+0x118/0x5e8 [ 31.711321] kasan_report_invalid_free+0xc0/0xe8 [ 31.711368] check_slab_allocation+0xd4/0x108 [ 31.711414] __kasan_slab_pre_free+0x2c/0x48 [ 31.711463] kmem_cache_free+0xf0/0x468 [ 31.711510] kmem_cache_double_free+0x190/0x3c8 [ 31.711559] kunit_try_run_case+0x170/0x3f0 [ 31.711609] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.711663] kthread+0x328/0x630 [ 31.711704] ret_from_fork+0x10/0x20 [ 31.711752] [ 31.711770] Allocated by task 242: [ 31.711800] kasan_save_stack+0x3c/0x68 [ 31.711839] kasan_save_track+0x20/0x40 [ 31.711872] kasan_save_alloc_info+0x40/0x58 [ 31.711922] __kasan_slab_alloc+0xa8/0xb0 [ 31.711958] kmem_cache_alloc_noprof+0x10c/0x398 [ 31.711999] kmem_cache_double_free+0x12c/0x3c8 [ 31.712038] kunit_try_run_case+0x170/0x3f0 [ 31.712075] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.712116] kthread+0x328/0x630 [ 31.712149] ret_from_fork+0x10/0x20 [ 31.712183] [ 31.712202] Freed by task 242: [ 31.712229] kasan_save_stack+0x3c/0x68 [ 31.712262] kasan_save_track+0x20/0x40 [ 31.712295] kasan_save_free_info+0x4c/0x78 [ 31.712333] __kasan_slab_free+0x6c/0x98 [ 31.712366] kmem_cache_free+0x260/0x468 [ 31.712405] kmem_cache_double_free+0x140/0x3c8 [ 31.712443] kunit_try_run_case+0x170/0x3f0 [ 31.712480] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.712557] kthread+0x328/0x630 [ 31.712591] ret_from_fork+0x10/0x20 [ 31.712643] [ 31.712663] The buggy address belongs to the object at fff00000c9a91000 [ 31.712663] which belongs to the cache test_cache of size 200 [ 31.712720] The buggy address is located 0 bytes inside of [ 31.712720] 200-byte region [fff00000c9a91000, fff00000c9a910c8) [ 31.712781] [ 31.712801] The buggy address belongs to the physical page: [ 31.712841] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a91 [ 31.712905] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.712959] page_type: f5(slab) [ 31.713000] raw: 0bfffe0000000000 fff00000c5c24640 dead000000000122 0000000000000000 [ 31.713050] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 31.713091] page dumped because: kasan: bad access detected [ 31.713122] [ 31.713139] Memory state around the buggy address: [ 31.713174] fff00000c9a90f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.713217] fff00000c9a90f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.713260] >fff00000c9a91000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.713298] ^ [ 31.713328] fff00000c9a91080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.713368] fff00000c9a91100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.713408] ==================================================================
[ 25.901002] ================================================================== [ 25.901453] BUG: KASAN: double-free in kmem_cache_double_free+0x1e5/0x480 [ 25.902345] Free of addr ffff88810609e000 by task kunit_try_catch/258 [ 25.902634] [ 25.902774] CPU: 1 UID: 0 PID: 258 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250723 #1 PREEMPT(voluntary) [ 25.902829] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.902842] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.902864] Call Trace: [ 25.902879] <TASK> [ 25.902897] dump_stack_lvl+0x73/0xb0 [ 25.902932] print_report+0xd1/0x640 [ 25.903303] ? __virt_addr_valid+0x1db/0x2d0 [ 25.903338] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.903364] ? kmem_cache_double_free+0x1e5/0x480 [ 25.903390] kasan_report_invalid_free+0x10a/0x130 [ 25.903415] ? kmem_cache_double_free+0x1e5/0x480 [ 25.903441] ? kmem_cache_double_free+0x1e5/0x480 [ 25.903464] check_slab_allocation+0x101/0x130 [ 25.903486] __kasan_slab_pre_free+0x28/0x40 [ 25.903506] kmem_cache_free+0xed/0x420 [ 25.903527] ? kmem_cache_alloc_noprof+0x123/0x3f0 [ 25.903552] ? kmem_cache_double_free+0x1e5/0x480 [ 25.903578] kmem_cache_double_free+0x1e5/0x480 [ 25.903602] ? __pfx_kmem_cache_double_free+0x10/0x10 [ 25.903631] ? finish_task_switch.isra.0+0x153/0x700 [ 25.903654] ? __switch_to+0x47/0xf80 [ 25.903684] ? __pfx_read_tsc+0x10/0x10 [ 25.903706] ? ktime_get_ts64+0x86/0x230 [ 25.903732] kunit_try_run_case+0x1a5/0x480 [ 25.903759] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.903781] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.903807] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.903832] ? __kthread_parkme+0x82/0x180 [ 25.903853] ? preempt_count_sub+0x50/0x80 [ 25.903876] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.903899] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.903923] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.903945] kthread+0x337/0x6f0 [ 25.903965] ? trace_preempt_on+0x20/0xc0 [ 25.903990] ? __pfx_kthread+0x10/0x10 [ 25.904011] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.904034] ? calculate_sigpending+0x7b/0xa0 [ 25.904058] ? __pfx_kthread+0x10/0x10 [ 25.904079] ret_from_fork+0x116/0x1d0 [ 25.904099] ? __pfx_kthread+0x10/0x10 [ 25.904119] ret_from_fork_asm+0x1a/0x30 [ 25.904160] </TASK> [ 25.904172] [ 25.918115] Allocated by task 258: [ 25.918337] kasan_save_stack+0x45/0x70 [ 25.918715] kasan_save_track+0x18/0x40 [ 25.918898] kasan_save_alloc_info+0x3b/0x50 [ 25.919367] __kasan_slab_alloc+0x91/0xa0 [ 25.919716] kmem_cache_alloc_noprof+0x123/0x3f0 [ 25.920044] kmem_cache_double_free+0x14f/0x480 [ 25.920356] kunit_try_run_case+0x1a5/0x480 [ 25.920748] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.921171] kthread+0x337/0x6f0 [ 25.921477] ret_from_fork+0x116/0x1d0 [ 25.921770] ret_from_fork_asm+0x1a/0x30 [ 25.922311] [ 25.922601] Freed by task 258: [ 25.922935] kasan_save_stack+0x45/0x70 [ 25.923080] kasan_save_track+0x18/0x40 [ 25.923226] kasan_save_free_info+0x3f/0x60 [ 25.923363] __kasan_slab_free+0x56/0x70 [ 25.924132] kmem_cache_free+0x249/0x420 [ 25.924714] kmem_cache_double_free+0x16a/0x480 [ 25.925216] kunit_try_run_case+0x1a5/0x480 [ 25.925683] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.926104] kthread+0x337/0x6f0 [ 25.926234] ret_from_fork+0x116/0x1d0 [ 25.926359] ret_from_fork_asm+0x1a/0x30 [ 25.926830] [ 25.927003] The buggy address belongs to the object at ffff88810609e000 [ 25.927003] which belongs to the cache test_cache of size 200 [ 25.928081] The buggy address is located 0 bytes inside of [ 25.928081] 200-byte region [ffff88810609e000, ffff88810609e0c8) [ 25.928854] [ 25.928934] The buggy address belongs to the physical page: [ 25.929470] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10609e [ 25.930255] flags: 0x200000000000000(node=0|zone=2) [ 25.930592] page_type: f5(slab) [ 25.930718] raw: 0200000000000000 ffff8881012428c0 dead000000000122 0000000000000000 [ 25.930935] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 25.931701] page dumped because: kasan: bad access detected [ 25.932296] [ 25.932481] Memory state around the buggy address: [ 25.932955] ffff88810609df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.933689] ffff88810609df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.933910] >ffff88810609e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.934141] ^ [ 25.934264] ffff88810609e080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.934742] ffff88810609e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.935433] ==================================================================