Date
June 18, 2025, 6:43 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.282169] ================================================================== [ 21.282342] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 21.282485] Read of size 1 at addr fff00000c6058180 by task kunit_try_catch/202 [ 21.282977] [ 21.283205] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc2-next-20250618 #1 PREEMPT [ 21.283466] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 21.283536] Hardware name: linux,dummy-virt (DT) [ 21.283606] Call trace: [ 21.283703] show_stack+0x20/0x38 (C) [ 21.283977] dump_stack_lvl+0x8c/0xd0 [ 21.284296] print_report+0x118/0x608 [ 21.284577] kasan_report+0xdc/0x128 [ 21.284716] __kasan_check_byte+0x54/0x70 [ 21.285181] kfree_sensitive+0x30/0xb0 [ 21.285311] kmalloc_double_kzfree+0x168/0x308 [ 21.285555] kunit_try_run_case+0x170/0x3f0 [ 21.285917] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.286053] kthread+0x328/0x630 [ 21.286248] ret_from_fork+0x10/0x20 [ 21.286517] [ 21.286562] Allocated by task 202: [ 21.286631] kasan_save_stack+0x3c/0x68 [ 21.286924] kasan_save_track+0x20/0x40 [ 21.287195] kasan_save_alloc_info+0x40/0x58 [ 21.287432] __kasan_kmalloc+0xd4/0xd8 [ 21.287555] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.287646] kmalloc_double_kzfree+0xb8/0x308 [ 21.287741] kunit_try_run_case+0x170/0x3f0 [ 21.287838] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.287948] kthread+0x328/0x630 [ 21.288042] ret_from_fork+0x10/0x20 [ 21.288139] [ 21.288187] Freed by task 202: [ 21.288259] kasan_save_stack+0x3c/0x68 [ 21.288357] kasan_save_track+0x20/0x40 [ 21.288875] kasan_save_free_info+0x4c/0x78 [ 21.289146] __kasan_slab_free+0x6c/0x98 [ 21.289244] kfree+0x214/0x3c8 [ 21.289372] kfree_sensitive+0x80/0xb0 [ 21.289840] kmalloc_double_kzfree+0x11c/0x308 [ 21.289962] kunit_try_run_case+0x170/0x3f0 [ 21.290115] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.290248] kthread+0x328/0x630 [ 21.290409] ret_from_fork+0x10/0x20 [ 21.290500] [ 21.290544] The buggy address belongs to the object at fff00000c6058180 [ 21.290544] which belongs to the cache kmalloc-16 of size 16 [ 21.290660] The buggy address is located 0 bytes inside of [ 21.290660] freed 16-byte region [fff00000c6058180, fff00000c6058190) [ 21.290805] [ 21.290853] The buggy address belongs to the physical page: [ 21.290956] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106058 [ 21.291403] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.291605] page_type: f5(slab) [ 21.291742] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 21.292146] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 21.292272] page dumped because: kasan: bad access detected [ 21.292439] [ 21.292507] Memory state around the buggy address: [ 21.292718] fff00000c6058080: fa fb fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 21.293044] fff00000c6058100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 21.293167] >fff00000c6058180: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.293926] ^ [ 21.294202] fff00000c6058200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.294322] fff00000c6058280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.294758] ==================================================================
[ 11.464128] ================================================================== [ 11.464969] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 11.465691] Read of size 1 at addr ffff8881028596a0 by task kunit_try_catch/218 [ 11.466043] [ 11.466151] CPU: 1 UID: 0 PID: 218 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250618 #1 PREEMPT(voluntary) [ 11.466199] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.466250] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.466271] Call Trace: [ 11.466283] <TASK> [ 11.466298] dump_stack_lvl+0x73/0xb0 [ 11.466341] print_report+0xd1/0x650 [ 11.466361] ? __virt_addr_valid+0x1db/0x2d0 [ 11.466383] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.466434] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.466458] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.466490] kasan_report+0x141/0x180 [ 11.466511] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.466534] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.466555] __kasan_check_byte+0x3d/0x50 [ 11.466650] kfree_sensitive+0x22/0x90 [ 11.466689] kmalloc_double_kzfree+0x19c/0x350 [ 11.466710] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 11.466761] ? __schedule+0x10cc/0x2b60 [ 11.466783] ? __pfx_read_tsc+0x10/0x10 [ 11.466804] ? ktime_get_ts64+0x86/0x230 [ 11.466839] kunit_try_run_case+0x1a5/0x480 [ 11.466863] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.466884] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.466905] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.466925] ? __kthread_parkme+0x82/0x180 [ 11.466945] ? preempt_count_sub+0x50/0x80 [ 11.466967] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.466989] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.467009] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.467031] kthread+0x337/0x6f0 [ 11.467049] ? trace_preempt_on+0x20/0xc0 [ 11.467072] ? __pfx_kthread+0x10/0x10 [ 11.467092] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.467111] ? calculate_sigpending+0x7b/0xa0 [ 11.467135] ? __pfx_kthread+0x10/0x10 [ 11.467155] ret_from_fork+0x116/0x1d0 [ 11.467172] ? __pfx_kthread+0x10/0x10 [ 11.467191] ret_from_fork_asm+0x1a/0x30 [ 11.467230] </TASK> [ 11.467241] [ 11.478156] Allocated by task 218: [ 11.478810] kasan_save_stack+0x45/0x70 [ 11.479138] kasan_save_track+0x18/0x40 [ 11.479687] kasan_save_alloc_info+0x3b/0x50 [ 11.479889] __kasan_kmalloc+0xb7/0xc0 [ 11.480141] __kmalloc_cache_noprof+0x189/0x420 [ 11.480493] kmalloc_double_kzfree+0xa9/0x350 [ 11.480713] kunit_try_run_case+0x1a5/0x480 [ 11.481160] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.481417] kthread+0x337/0x6f0 [ 11.481737] ret_from_fork+0x116/0x1d0 [ 11.482041] ret_from_fork_asm+0x1a/0x30 [ 11.482403] [ 11.482581] Freed by task 218: [ 11.482842] kasan_save_stack+0x45/0x70 [ 11.483190] kasan_save_track+0x18/0x40 [ 11.483405] kasan_save_free_info+0x3f/0x60 [ 11.483922] __kasan_slab_free+0x56/0x70 [ 11.484246] kfree+0x222/0x3f0 [ 11.484415] kfree_sensitive+0x67/0x90 [ 11.484567] kmalloc_double_kzfree+0x12b/0x350 [ 11.484776] kunit_try_run_case+0x1a5/0x480 [ 11.484963] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.485217] kthread+0x337/0x6f0 [ 11.485365] ret_from_fork+0x116/0x1d0 [ 11.485534] ret_from_fork_asm+0x1a/0x30 [ 11.485708] [ 11.486319] The buggy address belongs to the object at ffff8881028596a0 [ 11.486319] which belongs to the cache kmalloc-16 of size 16 [ 11.487024] The buggy address is located 0 bytes inside of [ 11.487024] freed 16-byte region [ffff8881028596a0, ffff8881028596b0) [ 11.487958] [ 11.488057] The buggy address belongs to the physical page: [ 11.488551] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102859 [ 11.489058] flags: 0x200000000000000(node=0|zone=2) [ 11.489439] page_type: f5(slab) [ 11.489848] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 11.490376] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.490839] page dumped because: kasan: bad access detected [ 11.491261] [ 11.491360] Memory state around the buggy address: [ 11.491944] ffff888102859580: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.492407] ffff888102859600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.492858] >ffff888102859680: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 11.493347] ^ [ 11.493720] ffff888102859700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.494185] ffff888102859780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.494654] ==================================================================