Date
July 20, 2025, 8:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.512972] ================================================================== [ 16.513118] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x174/0x300 [ 16.513206] Read of size 1 at addr fff00000c5bc08c0 by task kunit_try_catch/216 [ 16.513259] [ 16.513450] CPU: 1 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.513540] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.513625] Hardware name: linux,dummy-virt (DT) [ 16.513662] Call trace: [ 16.513687] show_stack+0x20/0x38 (C) [ 16.513744] dump_stack_lvl+0x8c/0xd0 [ 16.513795] print_report+0x118/0x5d0 [ 16.513840] kasan_report+0xdc/0x128 [ 16.513886] __kasan_check_byte+0x54/0x70 [ 16.513931] kmem_cache_destroy+0x34/0x218 [ 16.513980] kmem_cache_double_destroy+0x174/0x300 [ 16.514029] kunit_try_run_case+0x170/0x3f0 [ 16.514076] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.514128] kthread+0x328/0x630 [ 16.514214] ret_from_fork+0x10/0x20 [ 16.514263] [ 16.514312] Allocated by task 216: [ 16.514347] kasan_save_stack+0x3c/0x68 [ 16.514457] kasan_save_track+0x20/0x40 [ 16.514638] kasan_save_alloc_info+0x40/0x58 [ 16.514728] __kasan_slab_alloc+0xa8/0xb0 [ 16.514875] kmem_cache_alloc_noprof+0x10c/0x398 [ 16.514953] __kmem_cache_create_args+0x178/0x280 [ 16.515098] kmem_cache_double_destroy+0xc0/0x300 [ 16.515209] kunit_try_run_case+0x170/0x3f0 [ 16.515274] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.515572] kthread+0x328/0x630 [ 16.515650] ret_from_fork+0x10/0x20 [ 16.515704] [ 16.515752] Freed by task 216: [ 16.515805] kasan_save_stack+0x3c/0x68 [ 16.515874] kasan_save_track+0x20/0x40 [ 16.516022] kasan_save_free_info+0x4c/0x78 [ 16.516168] __kasan_slab_free+0x6c/0x98 [ 16.516267] kmem_cache_free+0x260/0x468 [ 16.516577] slab_kmem_cache_release+0x38/0x50 [ 16.516769] kmem_cache_release+0x1c/0x30 [ 16.516809] kobject_put+0x17c/0x420 [ 16.516851] sysfs_slab_release+0x1c/0x30 [ 16.517155] kmem_cache_destroy+0x118/0x218 [ 16.517333] kmem_cache_double_destroy+0x128/0x300 [ 16.517428] kunit_try_run_case+0x170/0x3f0 [ 16.517563] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.517652] kthread+0x328/0x630 [ 16.517776] ret_from_fork+0x10/0x20 [ 16.517818] [ 16.517863] The buggy address belongs to the object at fff00000c5bc08c0 [ 16.517863] which belongs to the cache kmem_cache of size 208 [ 16.517928] The buggy address is located 0 bytes inside of [ 16.517928] freed 208-byte region [fff00000c5bc08c0, fff00000c5bc0990) [ 16.517991] [ 16.518025] The buggy address belongs to the physical page: [ 16.518068] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105bc0 [ 16.518144] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.518336] page_type: f5(slab) [ 16.518384] raw: 0bfffe0000000000 fff00000c0001000 dead000000000122 0000000000000000 [ 16.518435] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 16.518478] page dumped because: kasan: bad access detected [ 16.518536] [ 16.518554] Memory state around the buggy address: [ 16.518589] fff00000c5bc0780: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.518630] fff00000c5bc0800: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 16.518687] >fff00000c5bc0880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.518733] ^ [ 16.518768] fff00000c5bc0900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.518810] fff00000c5bc0980: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.518863] ==================================================================
[ 13.794582] ================================================================== [ 13.795650] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x1bf/0x380 [ 13.796159] Read of size 1 at addr ffff888100fc9dc0 by task kunit_try_catch/233 [ 13.797257] [ 13.797722] CPU: 1 UID: 0 PID: 233 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 13.797780] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.797793] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.797819] Call Trace: [ 13.797837] <TASK> [ 13.797858] dump_stack_lvl+0x73/0xb0 [ 13.797922] print_report+0xd1/0x610 [ 13.797948] ? __virt_addr_valid+0x1db/0x2d0 [ 13.797974] ? kmem_cache_double_destroy+0x1bf/0x380 [ 13.797999] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.798022] ? kmem_cache_double_destroy+0x1bf/0x380 [ 13.798048] kasan_report+0x141/0x180 [ 13.798071] ? kmem_cache_double_destroy+0x1bf/0x380 [ 13.798099] ? kmem_cache_double_destroy+0x1bf/0x380 [ 13.798134] __kasan_check_byte+0x3d/0x50 [ 13.798157] kmem_cache_destroy+0x25/0x1d0 [ 13.798183] kmem_cache_double_destroy+0x1bf/0x380 [ 13.798208] ? __pfx_kmem_cache_double_destroy+0x10/0x10 [ 13.798233] ? finish_task_switch.isra.0+0x153/0x700 [ 13.798257] ? __switch_to+0x47/0xf50 [ 13.798287] ? __pfx_read_tsc+0x10/0x10 [ 13.798310] ? ktime_get_ts64+0x86/0x230 [ 13.798335] kunit_try_run_case+0x1a5/0x480 [ 13.798362] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.798385] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.798411] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.798436] ? __kthread_parkme+0x82/0x180 [ 13.798458] ? preempt_count_sub+0x50/0x80 [ 13.798493] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.798518] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.798542] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.798566] kthread+0x337/0x6f0 [ 13.798587] ? trace_preempt_on+0x20/0xc0 [ 13.798612] ? __pfx_kthread+0x10/0x10 [ 13.798633] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.798657] ? calculate_sigpending+0x7b/0xa0 [ 13.798682] ? __pfx_kthread+0x10/0x10 [ 13.798703] ret_from_fork+0x116/0x1d0 [ 13.798723] ? __pfx_kthread+0x10/0x10 [ 13.798743] ret_from_fork_asm+0x1a/0x30 [ 13.798777] </TASK> [ 13.798788] [ 13.808171] Allocated by task 233: [ 13.808314] kasan_save_stack+0x45/0x70 [ 13.808604] kasan_save_track+0x18/0x40 [ 13.808883] kasan_save_alloc_info+0x3b/0x50 [ 13.809153] __kasan_slab_alloc+0x91/0xa0 [ 13.809355] kmem_cache_alloc_noprof+0x123/0x3f0 [ 13.809687] __kmem_cache_create_args+0x169/0x240 [ 13.810013] kmem_cache_double_destroy+0xd5/0x380 [ 13.810186] kunit_try_run_case+0x1a5/0x480 [ 13.810341] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.810731] kthread+0x337/0x6f0 [ 13.811169] ret_from_fork+0x116/0x1d0 [ 13.811374] ret_from_fork_asm+0x1a/0x30 [ 13.811594] [ 13.811694] Freed by task 233: [ 13.811957] kasan_save_stack+0x45/0x70 [ 13.812260] kasan_save_track+0x18/0x40 [ 13.812465] kasan_save_free_info+0x3f/0x60 [ 13.812710] __kasan_slab_free+0x56/0x70 [ 13.812980] kmem_cache_free+0x249/0x420 [ 13.813260] slab_kmem_cache_release+0x2e/0x40 [ 13.813427] kmem_cache_release+0x16/0x20 [ 13.813646] kobject_put+0x181/0x450 [ 13.813834] sysfs_slab_release+0x16/0x20 [ 13.814210] kmem_cache_destroy+0xf0/0x1d0 [ 13.814602] kmem_cache_double_destroy+0x14e/0x380 [ 13.814786] kunit_try_run_case+0x1a5/0x480 [ 13.815079] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.815505] kthread+0x337/0x6f0 [ 13.815686] ret_from_fork+0x116/0x1d0 [ 13.815920] ret_from_fork_asm+0x1a/0x30 [ 13.816120] [ 13.816303] The buggy address belongs to the object at ffff888100fc9dc0 [ 13.816303] which belongs to the cache kmem_cache of size 208 [ 13.816818] The buggy address is located 0 bytes inside of [ 13.816818] freed 208-byte region [ffff888100fc9dc0, ffff888100fc9e90) [ 13.817540] [ 13.817697] The buggy address belongs to the physical page: [ 13.817914] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100fc9 [ 13.818376] flags: 0x200000000000000(node=0|zone=2) [ 13.818872] page_type: f5(slab) [ 13.819120] raw: 0200000000000000 ffff888100041000 dead000000000122 0000000000000000 [ 13.819496] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 13.819885] page dumped because: kasan: bad access detected [ 13.820283] [ 13.820392] Memory state around the buggy address: [ 13.820661] ffff888100fc9c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.821033] ffff888100fc9d00: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 13.821456] >ffff888100fc9d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.821834] ^ [ 13.822150] ffff888100fc9e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.822616] ffff888100fc9e80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.823212] ==================================================================