Date
July 23, 2025, 2:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.590948] ================================================================== [ 15.591294] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 15.591386] Read of size 1 at addr fff00000c3ec4160 by task kunit_try_catch/192 [ 15.591889] [ 15.591933] CPU: 1 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT [ 15.592339] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.592383] Hardware name: linux,dummy-virt (DT) [ 15.592561] Call trace: [ 15.592629] show_stack+0x20/0x38 (C) [ 15.592907] dump_stack_lvl+0x8c/0xd0 [ 15.593304] print_report+0x118/0x5d0 [ 15.593420] kasan_report+0xdc/0x128 [ 15.593480] __kasan_check_byte+0x54/0x70 [ 15.593692] kfree_sensitive+0x30/0xb0 [ 15.594091] kmalloc_double_kzfree+0x168/0x308 [ 15.594636] kunit_try_run_case+0x170/0x3f0 [ 15.594695] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.594772] kthread+0x328/0x630 [ 15.594815] ret_from_fork+0x10/0x20 [ 15.594871] [ 15.594892] Allocated by task 192: [ 15.595309] kasan_save_stack+0x3c/0x68 [ 15.595403] kasan_save_track+0x20/0x40 [ 15.595566] kasan_save_alloc_info+0x40/0x58 [ 15.595702] __kasan_kmalloc+0xd4/0xd8 [ 15.595884] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.595983] kmalloc_double_kzfree+0xb8/0x308 [ 15.596066] kunit_try_run_case+0x170/0x3f0 [ 15.596421] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.596636] kthread+0x328/0x630 [ 15.596678] ret_from_fork+0x10/0x20 [ 15.596715] [ 15.596914] Freed by task 192: [ 15.596948] kasan_save_stack+0x3c/0x68 [ 15.596991] kasan_save_track+0x20/0x40 [ 15.597032] kasan_save_free_info+0x4c/0x78 [ 15.597088] __kasan_slab_free+0x6c/0x98 [ 15.597129] kfree+0x214/0x3c8 [ 15.597168] kfree_sensitive+0x80/0xb0 [ 15.597205] kmalloc_double_kzfree+0x11c/0x308 [ 15.597244] kunit_try_run_case+0x170/0x3f0 [ 15.597292] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.597350] kthread+0x328/0x630 [ 15.597382] ret_from_fork+0x10/0x20 [ 15.597419] [ 15.597439] The buggy address belongs to the object at fff00000c3ec4160 [ 15.597439] which belongs to the cache kmalloc-16 of size 16 [ 15.597509] The buggy address is located 0 bytes inside of [ 15.597509] freed 16-byte region [fff00000c3ec4160, fff00000c3ec4170) [ 15.597573] [ 15.597602] The buggy address belongs to the physical page: [ 15.597640] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103ec4 [ 15.597696] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.597751] page_type: f5(slab) [ 15.597792] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.597844] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.597915] page dumped because: kasan: bad access detected [ 15.597955] [ 15.597995] Memory state around the buggy address: [ 15.598027] fff00000c3ec4000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.598072] fff00000c3ec4080: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.598125] >fff00000c3ec4100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.598163] ^ [ 15.598217] fff00000c3ec4180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.598279] fff00000c3ec4200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.598319] ==================================================================
[ 12.929765] ================================================================== [ 12.931415] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 12.931842] Read of size 1 at addr ffff8881025ca060 by task kunit_try_catch/209 [ 12.932253] [ 12.932698] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 12.932754] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.932766] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.932787] Call Trace: [ 12.932799] <TASK> [ 12.932824] dump_stack_lvl+0x73/0xb0 [ 12.932861] print_report+0xd1/0x610 [ 12.932883] ? __virt_addr_valid+0x1db/0x2d0 [ 12.932905] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.932927] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.932949] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.932972] kasan_report+0x141/0x180 [ 12.932993] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.933017] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.933040] __kasan_check_byte+0x3d/0x50 [ 12.933060] kfree_sensitive+0x22/0x90 [ 12.933083] kmalloc_double_kzfree+0x19c/0x350 [ 12.933105] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.933130] ? __schedule+0x10c6/0x2b60 [ 12.933152] ? __pfx_read_tsc+0x10/0x10 [ 12.933172] ? ktime_get_ts64+0x86/0x230 [ 12.933196] kunit_try_run_case+0x1a5/0x480 [ 12.933220] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.933253] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.933276] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.933299] ? __kthread_parkme+0x82/0x180 [ 12.933330] ? preempt_count_sub+0x50/0x80 [ 12.933353] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.933388] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.933411] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.933434] kthread+0x337/0x6f0 [ 12.933453] ? trace_preempt_on+0x20/0xc0 [ 12.933475] ? __pfx_kthread+0x10/0x10 [ 12.933495] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.933516] ? calculate_sigpending+0x7b/0xa0 [ 12.933538] ? __pfx_kthread+0x10/0x10 [ 12.933559] ret_from_fork+0x116/0x1d0 [ 12.933577] ? __pfx_kthread+0x10/0x10 [ 12.933597] ret_from_fork_asm+0x1a/0x30 [ 12.933626] </TASK> [ 12.933636] [ 12.947840] Allocated by task 209: [ 12.947974] kasan_save_stack+0x45/0x70 [ 12.948138] kasan_save_track+0x18/0x40 [ 12.948524] kasan_save_alloc_info+0x3b/0x50 [ 12.948923] __kasan_kmalloc+0xb7/0xc0 [ 12.949342] __kmalloc_cache_noprof+0x189/0x420 [ 12.949796] kmalloc_double_kzfree+0xa9/0x350 [ 12.950283] kunit_try_run_case+0x1a5/0x480 [ 12.950696] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.951196] kthread+0x337/0x6f0 [ 12.951499] ret_from_fork+0x116/0x1d0 [ 12.951915] ret_from_fork_asm+0x1a/0x30 [ 12.952328] [ 12.952487] Freed by task 209: [ 12.952793] kasan_save_stack+0x45/0x70 [ 12.953197] kasan_save_track+0x18/0x40 [ 12.953593] kasan_save_free_info+0x3f/0x60 [ 12.953900] __kasan_slab_free+0x56/0x70 [ 12.954044] kfree+0x222/0x3f0 [ 12.954242] kfree_sensitive+0x67/0x90 [ 12.954577] kmalloc_double_kzfree+0x12b/0x350 [ 12.955034] kunit_try_run_case+0x1a5/0x480 [ 12.955489] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.956009] kthread+0x337/0x6f0 [ 12.956338] ret_from_fork+0x116/0x1d0 [ 12.956724] ret_from_fork_asm+0x1a/0x30 [ 12.957010] [ 12.957182] The buggy address belongs to the object at ffff8881025ca060 [ 12.957182] which belongs to the cache kmalloc-16 of size 16 [ 12.957691] The buggy address is located 0 bytes inside of [ 12.957691] freed 16-byte region [ffff8881025ca060, ffff8881025ca070) [ 12.958809] [ 12.958995] The buggy address belongs to the physical page: [ 12.959546] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025ca [ 12.959965] flags: 0x200000000000000(node=0|zone=2) [ 12.960198] page_type: f5(slab) [ 12.960508] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.961288] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.962038] page dumped because: kasan: bad access detected [ 12.962561] [ 12.962647] Memory state around the buggy address: [ 12.962803] ffff8881025c9f00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.963427] ffff8881025c9f80: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.964208] >ffff8881025ca000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.964982] ^ [ 12.965593] ffff8881025ca080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.966118] ffff8881025ca100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.966373] ==================================================================