Date
July 24, 2025, 4:41 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.850118] ================================================================== [ 33.850211] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x174/0x300 [ 33.850291] Read of size 1 at addr fff00000c4565640 by task kunit_try_catch/246 [ 33.850344] [ 33.850390] CPU: 1 UID: 0 PID: 246 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250724 #1 PREEMPT [ 33.850481] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.850510] Hardware name: linux,dummy-virt (DT) [ 33.850543] Call trace: [ 33.850571] show_stack+0x20/0x38 (C) [ 33.850624] dump_stack_lvl+0x8c/0xd0 [ 33.850674] print_report+0x118/0x5e8 [ 33.850719] kasan_report+0xdc/0x128 [ 33.850774] __kasan_check_byte+0x54/0x70 [ 33.850820] kmem_cache_destroy+0x34/0x218 [ 33.850868] kmem_cache_double_destroy+0x174/0x300 [ 33.850920] kunit_try_run_case+0x170/0x3f0 [ 33.850998] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.851052] kthread+0x328/0x630 [ 33.851095] ret_from_fork+0x10/0x20 [ 33.851146] [ 33.851165] Allocated by task 246: [ 33.851196] kasan_save_stack+0x3c/0x68 [ 33.851237] kasan_save_track+0x20/0x40 [ 33.851273] kasan_save_alloc_info+0x40/0x58 [ 33.851313] __kasan_slab_alloc+0xa8/0xb0 [ 33.851349] kmem_cache_alloc_noprof+0x10c/0x398 [ 33.851392] __kmem_cache_create_args+0x178/0x280 [ 33.851433] kmem_cache_double_destroy+0xc0/0x300 [ 33.851475] kunit_try_run_case+0x170/0x3f0 [ 33.851511] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.851556] kthread+0x328/0x630 [ 33.851588] ret_from_fork+0x10/0x20 [ 33.851625] [ 33.851644] Freed by task 246: [ 33.851672] kasan_save_stack+0x3c/0x68 [ 33.851706] kasan_save_track+0x20/0x40 [ 33.851742] kasan_save_free_info+0x4c/0x78 [ 33.851789] __kasan_slab_free+0x6c/0x98 [ 33.851825] kmem_cache_free+0x260/0x468 [ 33.851863] slab_kmem_cache_release+0x38/0x50 [ 33.851904] kmem_cache_release+0x1c/0x30 [ 33.851942] kobject_put+0x17c/0x420 [ 33.851983] sysfs_slab_release+0x1c/0x30 [ 33.852018] kmem_cache_destroy+0x118/0x218 [ 33.852059] kmem_cache_double_destroy+0x128/0x300 [ 33.852099] kunit_try_run_case+0x170/0x3f0 [ 33.852135] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.852179] kthread+0x328/0x630 [ 33.852213] ret_from_fork+0x10/0x20 [ 33.852250] [ 33.852270] The buggy address belongs to the object at fff00000c4565640 [ 33.852270] which belongs to the cache kmem_cache of size 208 [ 33.852330] The buggy address is located 0 bytes inside of [ 33.852330] freed 208-byte region [fff00000c4565640, fff00000c4565710) [ 33.852392] [ 33.852414] The buggy address belongs to the physical page: [ 33.852457] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104565 [ 33.852516] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.852571] page_type: f5(slab) [ 33.852618] raw: 0bfffe0000000000 fff00000c0001000 dead000000000100 dead000000000122 [ 33.852670] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 33.852713] page dumped because: kasan: bad access detected [ 33.852755] [ 33.852775] Memory state around the buggy address: [ 33.852811] fff00000c4565500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.852857] fff00000c4565580: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.852901] >fff00000c4565600: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.852941] ^ [ 33.852975] fff00000c4565680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.853018] fff00000c4565700: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.853055] ==================================================================
[ 27.716765] ================================================================== [ 27.717887] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x1bf/0x380 [ 27.718176] Read of size 1 at addr ffff888100fbe640 by task kunit_try_catch/263 [ 27.718388] [ 27.718478] CPU: 1 UID: 0 PID: 263 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250724 #1 PREEMPT(voluntary) [ 27.718536] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 27.718551] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.718645] Call Trace: [ 27.718662] <TASK> [ 27.718685] dump_stack_lvl+0x73/0xb0 [ 27.718720] print_report+0xd1/0x640 [ 27.718745] ? __virt_addr_valid+0x1db/0x2d0 [ 27.718772] ? kmem_cache_double_destroy+0x1bf/0x380 [ 27.718845] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.718872] ? kmem_cache_double_destroy+0x1bf/0x380 [ 27.718897] kasan_report+0x141/0x180 [ 27.718920] ? kmem_cache_double_destroy+0x1bf/0x380 [ 27.718960] ? kmem_cache_double_destroy+0x1bf/0x380 [ 27.719015] __kasan_check_byte+0x3d/0x50 [ 27.719038] kmem_cache_destroy+0x25/0x1d0 [ 27.719067] kmem_cache_double_destroy+0x1bf/0x380 [ 27.719091] ? __pfx_kmem_cache_double_destroy+0x10/0x10 [ 27.719115] ? finish_task_switch.isra.0+0x153/0x700 [ 27.719139] ? __switch_to+0x47/0xf80 [ 27.719199] ? __pfx_read_tsc+0x10/0x10 [ 27.719222] ? ktime_get_ts64+0x86/0x230 [ 27.719248] kunit_try_run_case+0x1a5/0x480 [ 27.719283] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.719307] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.719363] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.719389] ? __kthread_parkme+0x82/0x180 [ 27.719410] ? preempt_count_sub+0x50/0x80 [ 27.719434] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.719458] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.719482] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.719506] kthread+0x337/0x6f0 [ 27.719525] ? trace_preempt_on+0x20/0xc0 [ 27.719550] ? __pfx_kthread+0x10/0x10 [ 27.719571] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.719604] ? calculate_sigpending+0x7b/0xa0 [ 27.719629] ? __pfx_kthread+0x10/0x10 [ 27.719652] ret_from_fork+0x116/0x1d0 [ 27.719705] ? __pfx_kthread+0x10/0x10 [ 27.719726] ret_from_fork_asm+0x1a/0x30 [ 27.719760] </TASK> [ 27.719770] [ 27.734370] Allocated by task 263: [ 27.734768] kasan_save_stack+0x45/0x70 [ 27.735127] kasan_save_track+0x18/0x40 [ 27.735266] kasan_save_alloc_info+0x3b/0x50 [ 27.735404] __kasan_slab_alloc+0x91/0xa0 [ 27.735532] kmem_cache_alloc_noprof+0x123/0x3f0 [ 27.735702] __kmem_cache_create_args+0x169/0x240 [ 27.735944] kmem_cache_double_destroy+0xd5/0x380 [ 27.736717] kunit_try_run_case+0x1a5/0x480 [ 27.737193] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.737831] kthread+0x337/0x6f0 [ 27.738178] ret_from_fork+0x116/0x1d0 [ 27.738533] ret_from_fork_asm+0x1a/0x30 [ 27.738910] [ 27.739156] Freed by task 263: [ 27.739457] kasan_save_stack+0x45/0x70 [ 27.739623] kasan_save_track+0x18/0x40 [ 27.739748] kasan_save_free_info+0x3f/0x60 [ 27.740175] __kasan_slab_free+0x56/0x70 [ 27.740522] kmem_cache_free+0x249/0x420 [ 27.740909] slab_kmem_cache_release+0x2e/0x40 [ 27.741384] kmem_cache_release+0x16/0x20 [ 27.741757] kobject_put+0x181/0x450 [ 27.742110] sysfs_slab_release+0x16/0x20 [ 27.742350] kmem_cache_destroy+0xf0/0x1d0 [ 27.742497] kmem_cache_double_destroy+0x14e/0x380 [ 27.742668] kunit_try_run_case+0x1a5/0x480 [ 27.742860] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.743348] kthread+0x337/0x6f0 [ 27.743645] ret_from_fork+0x116/0x1d0 [ 27.744015] ret_from_fork_asm+0x1a/0x30 [ 27.744686] [ 27.744890] The buggy address belongs to the object at ffff888100fbe640 [ 27.744890] which belongs to the cache kmem_cache of size 208 [ 27.745918] The buggy address is located 0 bytes inside of [ 27.745918] freed 208-byte region [ffff888100fbe640, ffff888100fbe710) [ 27.746268] [ 27.746339] The buggy address belongs to the physical page: [ 27.746521] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100fbe [ 27.747368] flags: 0x200000000000000(node=0|zone=2) [ 27.747879] page_type: f5(slab) [ 27.748186] raw: 0200000000000000 ffff888100041000 dead000000000100 dead000000000122 [ 27.749133] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 27.749795] page dumped because: kasan: bad access detected [ 27.750354] [ 27.750422] Memory state around the buggy address: [ 27.750586] ffff888100fbe500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.751010] ffff888100fbe580: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 27.751738] >ffff888100fbe600: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 27.752458] ^ [ 27.753221] ffff888100fbe680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.753814] ffff888100fbe700: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.754175] ==================================================================