Date
July 22, 2025, 2:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.573583] ================================================================== [ 18.573663] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x174/0x300 [ 18.573734] Read of size 1 at addr fff00000c1bdf8c0 by task kunit_try_catch/217 [ 18.573785] [ 18.573827] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.15.8-rc1 #1 PREEMPT [ 18.573913] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.573941] Hardware name: linux,dummy-virt (DT) [ 18.573975] Call trace: [ 18.574000] show_stack+0x20/0x38 (C) [ 18.574051] dump_stack_lvl+0x8c/0xd0 [ 18.574102] print_report+0x118/0x5d0 [ 18.574146] kasan_report+0xdc/0x128 [ 18.574188] __kasan_check_byte+0x54/0x70 [ 18.574233] kmem_cache_destroy+0x34/0x218 [ 18.574294] kmem_cache_double_destroy+0x174/0x300 [ 18.574347] kunit_try_run_case+0x170/0x3f0 [ 18.574398] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.574446] kthread+0x328/0x630 [ 18.574492] ret_from_fork+0x10/0x20 [ 18.574540] [ 18.574560] Allocated by task 217: [ 18.574590] kasan_save_stack+0x3c/0x68 [ 18.574630] kasan_save_track+0x20/0x40 [ 18.574665] kasan_save_alloc_info+0x40/0x58 [ 18.574704] __kasan_slab_alloc+0xa8/0xb0 [ 18.575193] kmem_cache_alloc_noprof+0x10c/0x398 [ 18.575242] __kmem_cache_create_args+0x178/0x280 [ 18.575295] kmem_cache_double_destroy+0xc0/0x300 [ 18.575339] kunit_try_run_case+0x170/0x3f0 [ 18.575377] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.575417] kthread+0x328/0x630 [ 18.575453] ret_from_fork+0x10/0x20 [ 18.575489] [ 18.575509] Freed by task 217: [ 18.575536] kasan_save_stack+0x3c/0x68 [ 18.575573] kasan_save_track+0x20/0x40 [ 18.575610] kasan_save_free_info+0x4c/0x78 [ 18.575648] __kasan_slab_free+0x6c/0x98 [ 18.575683] kmem_cache_free+0x260/0x468 [ 18.575717] slab_kmem_cache_release+0x38/0x50 [ 18.575755] kmem_cache_release+0x1c/0x30 [ 18.575793] kobject_put+0x17c/0x420 [ 18.575831] sysfs_slab_release+0x1c/0x30 [ 18.575866] kmem_cache_destroy+0x118/0x218 [ 18.575902] kmem_cache_double_destroy+0x128/0x300 [ 18.575944] kunit_try_run_case+0x170/0x3f0 [ 18.575982] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.576024] kthread+0x328/0x630 [ 18.576060] ret_from_fork+0x10/0x20 [ 18.576097] [ 18.576118] The buggy address belongs to the object at fff00000c1bdf8c0 [ 18.576118] which belongs to the cache kmem_cache of size 208 [ 18.576175] The buggy address is located 0 bytes inside of [ 18.576175] freed 208-byte region [fff00000c1bdf8c0, fff00000c1bdf990) [ 18.576237] [ 18.576258] The buggy address belongs to the physical page: [ 18.576301] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101bdf [ 18.576358] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.576410] page_type: f5(slab) [ 18.576452] raw: 0bfffe0000000000 fff00000c0001000 dead000000000122 0000000000000000 [ 18.576502] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 18.576544] page dumped because: kasan: bad access detected [ 18.576576] [ 18.576596] Memory state around the buggy address: [ 18.576630] fff00000c1bdf780: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.576673] fff00000c1bdf800: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 18.576716] >fff00000c1bdf880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.576754] ^ [ 18.576786] fff00000c1bdf900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.576829] fff00000c1bdf980: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.576868] ==================================================================
[ 11.984031] ================================================================== [ 11.984722] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x1bf/0x380 [ 11.985528] Read of size 1 at addr ffff8881014e3500 by task kunit_try_catch/235 [ 11.985775] [ 11.985896] CPU: 0 UID: 0 PID: 235 Comm: kunit_try_catch Tainted: G B N 6.15.8-rc1 #1 PREEMPT(voluntary) [ 11.985947] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.985958] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.985981] Call Trace: [ 11.985994] <TASK> [ 11.986012] dump_stack_lvl+0x73/0xb0 [ 11.986042] print_report+0xd1/0x610 [ 11.986066] ? __virt_addr_valid+0x1db/0x2d0 [ 11.986089] ? kmem_cache_double_destroy+0x1bf/0x380 [ 11.986109] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.986131] ? kmem_cache_double_destroy+0x1bf/0x380 [ 11.986152] kasan_report+0x141/0x180 [ 11.986174] ? kmem_cache_double_destroy+0x1bf/0x380 [ 11.986198] ? kmem_cache_double_destroy+0x1bf/0x380 [ 11.986220] __kasan_check_byte+0x3d/0x50 [ 11.986254] kmem_cache_destroy+0x25/0x1d0 [ 11.986278] kmem_cache_double_destroy+0x1bf/0x380 [ 11.986299] ? __pfx_kmem_cache_double_destroy+0x10/0x10 [ 11.986319] ? finish_task_switch.isra.0+0x153/0x700 [ 11.986343] ? __switch_to+0x5d9/0xf60 [ 11.986364] ? dequeue_task_fair+0x166/0x4e0 [ 11.986390] ? __pfx_read_tsc+0x10/0x10 [ 11.986411] ? ktime_get_ts64+0x86/0x230 [ 11.986436] kunit_try_run_case+0x1a5/0x480 [ 11.986459] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.986477] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.986498] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.986522] ? __kthread_parkme+0x82/0x180 [ 11.986545] ? preempt_count_sub+0x50/0x80 [ 11.986569] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.986589] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.986670] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.986698] kthread+0x337/0x6f0 [ 11.986715] ? trace_preempt_on+0x20/0xc0 [ 11.986739] ? __pfx_kthread+0x10/0x10 [ 11.986756] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.986779] ? calculate_sigpending+0x7b/0xa0 [ 11.986801] ? __pfx_kthread+0x10/0x10 [ 11.986818] ret_from_fork+0x41/0x80 [ 11.986840] ? __pfx_kthread+0x10/0x10 [ 11.986857] ret_from_fork_asm+0x1a/0x30 [ 11.986888] </TASK> [ 11.986899] [ 11.998062] Allocated by task 235: [ 11.998244] kasan_save_stack+0x45/0x70 [ 11.998555] kasan_save_track+0x18/0x40 [ 11.998782] kasan_save_alloc_info+0x3b/0x50 [ 11.998925] __kasan_slab_alloc+0x91/0xa0 [ 11.999186] kmem_cache_alloc_noprof+0x123/0x3f0 [ 11.999413] __kmem_cache_create_args+0x169/0x240 [ 11.999616] kmem_cache_double_destroy+0xd5/0x380 [ 11.999956] kunit_try_run_case+0x1a5/0x480 [ 12.000169] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.000406] kthread+0x337/0x6f0 [ 12.000556] ret_from_fork+0x41/0x80 [ 12.000720] ret_from_fork_asm+0x1a/0x30 [ 12.000858] [ 12.000932] Freed by task 235: [ 12.001088] kasan_save_stack+0x45/0x70 [ 12.001354] kasan_save_track+0x18/0x40 [ 12.001501] kasan_save_free_info+0x3f/0x60 [ 12.001692] __kasan_slab_free+0x56/0x70 [ 12.001890] kmem_cache_free+0x249/0x420 [ 12.002080] slab_kmem_cache_release+0x2e/0x40 [ 12.002279] kmem_cache_release+0x16/0x20 [ 12.002571] kobject_put+0x181/0x450 [ 12.002786] sysfs_slab_release+0x16/0x20 [ 12.002972] kmem_cache_destroy+0xf0/0x1d0 [ 12.003144] kmem_cache_double_destroy+0x14e/0x380 [ 12.003375] kunit_try_run_case+0x1a5/0x480 [ 12.003549] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.003962] kthread+0x337/0x6f0 [ 12.004140] ret_from_fork+0x41/0x80 [ 12.004306] ret_from_fork_asm+0x1a/0x30 [ 12.004585] [ 12.004659] The buggy address belongs to the object at ffff8881014e3500 [ 12.004659] which belongs to the cache kmem_cache of size 208 [ 12.005111] The buggy address is located 0 bytes inside of [ 12.005111] freed 208-byte region [ffff8881014e3500, ffff8881014e35d0) [ 12.005468] [ 12.005541] The buggy address belongs to the physical page: [ 12.005756] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1014e3 [ 12.006406] flags: 0x200000000000000(node=0|zone=2) [ 12.006698] page_type: f5(slab) [ 12.006911] raw: 0200000000000000 ffff888100041000 dead000000000122 0000000000000000 [ 12.007263] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 12.008012] page dumped because: kasan: bad access detected [ 12.008265] [ 12.008352] Memory state around the buggy address: [ 12.008559] ffff8881014e3400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.008899] ffff8881014e3480: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.009191] >ffff8881014e3500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.009609] ^ [ 12.009785] ffff8881014e3580: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 12.010001] ffff8881014e3600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.010213] ==================================================================