Date
July 24, 2025, 4:41 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.200413] ================================================================== [ 33.200889] BUG: KASAN: double-free in kmem_cache_double_free+0x190/0x3c8 [ 33.200964] Free of addr fff00000c9a94000 by task kunit_try_catch/240 [ 33.201026] [ 33.201148] CPU: 0 UID: 0 PID: 240 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250724 #1 PREEMPT [ 33.201595] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.201669] Hardware name: linux,dummy-virt (DT) [ 33.201734] Call trace: [ 33.201884] show_stack+0x20/0x38 (C) [ 33.202081] dump_stack_lvl+0x8c/0xd0 [ 33.202247] print_report+0x118/0x5e8 [ 33.202803] kasan_report_invalid_free+0xc0/0xe8 [ 33.203646] check_slab_allocation+0xd4/0x108 [ 33.203710] __kasan_slab_pre_free+0x2c/0x48 [ 33.203772] kmem_cache_free+0xf0/0x468 [ 33.203825] kmem_cache_double_free+0x190/0x3c8 [ 33.203896] kunit_try_run_case+0x170/0x3f0 [ 33.203948] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.204001] kthread+0x328/0x630 [ 33.204047] ret_from_fork+0x10/0x20 [ 33.204921] [ 33.205255] Allocated by task 240: [ 33.205292] kasan_save_stack+0x3c/0x68 [ 33.205685] kasan_save_track+0x20/0x40 [ 33.206037] kasan_save_alloc_info+0x40/0x58 [ 33.206223] __kasan_slab_alloc+0xa8/0xb0 [ 33.206549] kmem_cache_alloc_noprof+0x10c/0x398 [ 33.206763] kmem_cache_double_free+0x12c/0x3c8 [ 33.206812] kunit_try_run_case+0x170/0x3f0 [ 33.206848] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.206891] kthread+0x328/0x630 [ 33.206923] ret_from_fork+0x10/0x20 [ 33.207004] [ 33.207024] Freed by task 240: [ 33.207054] kasan_save_stack+0x3c/0x68 [ 33.207089] kasan_save_track+0x20/0x40 [ 33.207124] kasan_save_free_info+0x4c/0x78 [ 33.207286] __kasan_slab_free+0x6c/0x98 [ 33.207505] kmem_cache_free+0x260/0x468 [ 33.207550] kmem_cache_double_free+0x140/0x3c8 [ 33.207592] kunit_try_run_case+0x170/0x3f0 [ 33.207627] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.207715] kthread+0x328/0x630 [ 33.207780] ret_from_fork+0x10/0x20 [ 33.207823] [ 33.207926] The buggy address belongs to the object at fff00000c9a94000 [ 33.207926] which belongs to the cache test_cache of size 200 [ 33.208154] The buggy address is located 0 bytes inside of [ 33.208154] 200-byte region [fff00000c9a94000, fff00000c9a940c8) [ 33.208231] [ 33.208257] The buggy address belongs to the physical page: [ 33.208579] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a94 [ 33.208831] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.209372] page_type: f5(slab) [ 33.209534] raw: 0bfffe0000000000 fff00000c58d7640 dead000000000122 0000000000000000 [ 33.209597] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 33.209638] page dumped because: kasan: bad access detected [ 33.209998] [ 33.210020] Memory state around the buggy address: [ 33.210059] fff00000c9a93f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.210106] fff00000c9a93f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.210493] >fff00000c9a94000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.210539] ^ [ 33.210568] fff00000c9a94080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.210819] fff00000c9a94100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.210861] ==================================================================
[ 27.555196] ================================================================== [ 27.555694] BUG: KASAN: double-free in kmem_cache_double_free+0x1e5/0x480 [ 27.556450] Free of addr ffff88810546b000 by task kunit_try_catch/257 [ 27.556670] [ 27.556764] CPU: 0 UID: 0 PID: 257 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250724 #1 PREEMPT(voluntary) [ 27.556823] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 27.556837] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.556860] Call Trace: [ 27.556984] <TASK> [ 27.557009] dump_stack_lvl+0x73/0xb0 [ 27.557046] print_report+0xd1/0x640 [ 27.557071] ? __virt_addr_valid+0x1db/0x2d0 [ 27.557100] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.557125] ? kmem_cache_double_free+0x1e5/0x480 [ 27.557150] kasan_report_invalid_free+0x10a/0x130 [ 27.557174] ? kmem_cache_double_free+0x1e5/0x480 [ 27.557200] ? kmem_cache_double_free+0x1e5/0x480 [ 27.557224] check_slab_allocation+0x101/0x130 [ 27.557246] __kasan_slab_pre_free+0x28/0x40 [ 27.557266] kmem_cache_free+0xed/0x420 [ 27.557287] ? kmem_cache_alloc_noprof+0x123/0x3f0 [ 27.557312] ? kmem_cache_double_free+0x1e5/0x480 [ 27.557341] kmem_cache_double_free+0x1e5/0x480 [ 27.557366] ? __pfx_kmem_cache_double_free+0x10/0x10 [ 27.557389] ? finish_task_switch.isra.0+0x153/0x700 [ 27.557412] ? __switch_to+0x47/0xf80 [ 27.557443] ? __pfx_read_tsc+0x10/0x10 [ 27.557465] ? ktime_get_ts64+0x86/0x230 [ 27.557492] kunit_try_run_case+0x1a5/0x480 [ 27.557519] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.557541] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.557567] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.557607] ? __kthread_parkme+0x82/0x180 [ 27.557628] ? preempt_count_sub+0x50/0x80 [ 27.557651] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.557675] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.557698] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.557721] kthread+0x337/0x6f0 [ 27.557742] ? trace_preempt_on+0x20/0xc0 [ 27.557767] ? __pfx_kthread+0x10/0x10 [ 27.557840] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.557868] ? calculate_sigpending+0x7b/0xa0 [ 27.557893] ? __pfx_kthread+0x10/0x10 [ 27.557937] ret_from_fork+0x116/0x1d0 [ 27.557958] ? __pfx_kthread+0x10/0x10 [ 27.557978] ret_from_fork_asm+0x1a/0x30 [ 27.558011] </TASK> [ 27.558022] [ 27.568495] Allocated by task 257: [ 27.568703] kasan_save_stack+0x45/0x70 [ 27.568914] kasan_save_track+0x18/0x40 [ 27.569331] kasan_save_alloc_info+0x3b/0x50 [ 27.569498] __kasan_slab_alloc+0x91/0xa0 [ 27.569707] kmem_cache_alloc_noprof+0x123/0x3f0 [ 27.570051] kmem_cache_double_free+0x14f/0x480 [ 27.570265] kunit_try_run_case+0x1a5/0x480 [ 27.570451] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.570631] kthread+0x337/0x6f0 [ 27.570748] ret_from_fork+0x116/0x1d0 [ 27.570872] ret_from_fork_asm+0x1a/0x30 [ 27.571005] [ 27.571095] Freed by task 257: [ 27.571244] kasan_save_stack+0x45/0x70 [ 27.571433] kasan_save_track+0x18/0x40 [ 27.571626] kasan_save_free_info+0x3f/0x60 [ 27.572027] __kasan_slab_free+0x56/0x70 [ 27.572515] kmem_cache_free+0x249/0x420 [ 27.572722] kmem_cache_double_free+0x16a/0x480 [ 27.573661] kunit_try_run_case+0x1a5/0x480 [ 27.574206] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.574500] kthread+0x337/0x6f0 [ 27.574666] ret_from_fork+0x116/0x1d0 [ 27.574934] ret_from_fork_asm+0x1a/0x30 [ 27.575129] [ 27.575241] The buggy address belongs to the object at ffff88810546b000 [ 27.575241] which belongs to the cache test_cache of size 200 [ 27.575708] The buggy address is located 0 bytes inside of [ 27.575708] 200-byte region [ffff88810546b000, ffff88810546b0c8) [ 27.576291] [ 27.576392] The buggy address belongs to the physical page: [ 27.576591] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10546b [ 27.576879] flags: 0x200000000000000(node=0|zone=2) [ 27.577111] page_type: f5(slab) [ 27.577278] raw: 0200000000000000 ffff888101d87640 dead000000000122 0000000000000000 [ 27.577621] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 27.578309] page dumped because: kasan: bad access detected [ 27.578496] [ 27.578796] Memory state around the buggy address: [ 27.579197] ffff88810546af00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 27.579533] ffff88810546af80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 27.579874] >ffff88810546b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.580180] ^ [ 27.580368] ffff88810546b080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 27.580640] ffff88810546b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.580969] ==================================================================