Date
July 20, 2025, 11:12 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.492360] ================================================================== [ 15.492434] BUG: KASAN: double-free in kfree_sensitive+0x3c/0xb0 [ 15.492483] Free of addr fff00000c3fc6200 by task kunit_try_catch/192 [ 15.492524] [ 15.492553] CPU: 0 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.492636] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.494407] Hardware name: linux,dummy-virt (DT) [ 15.495329] Call trace: [ 15.495386] show_stack+0x20/0x38 (C) [ 15.495822] dump_stack_lvl+0x8c/0xd0 [ 15.497239] print_report+0x118/0x5d0 [ 15.497546] kasan_report_invalid_free+0xc0/0xe8 [ 15.497617] check_slab_allocation+0xd4/0x108 [ 15.497673] __kasan_slab_pre_free+0x2c/0x48 [ 15.497723] kfree+0xe8/0x3c8 [ 15.497766] kfree_sensitive+0x3c/0xb0 [ 15.497809] kmalloc_double_kzfree+0x168/0x308 [ 15.499115] kunit_try_run_case+0x170/0x3f0 [ 15.499288] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.499827] kthread+0x328/0x630 [ 15.500491] ret_from_fork+0x10/0x20 [ 15.500652] [ 15.500692] Allocated by task 192: [ 15.501143] kasan_save_stack+0x3c/0x68 [ 15.501250] kasan_save_track+0x20/0x40 [ 15.501652] kasan_save_alloc_info+0x40/0x58 [ 15.502046] __kasan_kmalloc+0xd4/0xd8 [ 15.502263] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.502307] kmalloc_double_kzfree+0xb8/0x308 [ 15.502346] kunit_try_run_case+0x170/0x3f0 [ 15.502777] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.502839] kthread+0x328/0x630 [ 15.503432] ret_from_fork+0x10/0x20 [ 15.503513] [ 15.503936] Freed by task 192: [ 15.504003] kasan_save_stack+0x3c/0x68 [ 15.504049] kasan_save_track+0x20/0x40 [ 15.504087] kasan_save_free_info+0x4c/0x78 [ 15.504807] __kasan_slab_free+0x6c/0x98 [ 15.505630] kfree+0x214/0x3c8 [ 15.506304] kfree_sensitive+0x80/0xb0 [ 15.506715] kmalloc_double_kzfree+0x11c/0x308 [ 15.506967] kunit_try_run_case+0x170/0x3f0 [ 15.507006] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.507408] kthread+0x328/0x630 [ 15.507537] ret_from_fork+0x10/0x20 [ 15.508096] [ 15.508123] The buggy address belongs to the object at fff00000c3fc6200 [ 15.508123] which belongs to the cache kmalloc-16 of size 16 [ 15.508408] The buggy address is located 0 bytes inside of [ 15.508408] 16-byte region [fff00000c3fc6200, fff00000c3fc6210) [ 15.509179] [ 15.509207] The buggy address belongs to the physical page: [ 15.509335] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103fc6 [ 15.509744] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.509798] page_type: f5(slab) [ 15.509838] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.511055] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.511281] page dumped because: kasan: bad access detected [ 15.511314] [ 15.511332] Memory state around the buggy address: [ 15.511366] fff00000c3fc6100: 00 06 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.511410] fff00000c3fc6180: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.511819] >fff00000c3fc6200: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.512282] ^ [ 15.512400] fff00000c3fc6280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.513181] fff00000c3fc6300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.513501] ==================================================================
[ 12.673926] ================================================================== [ 12.674178] BUG: KASAN: double-free in kfree_sensitive+0x2e/0x90 [ 12.674379] Free of addr ffff888101d1f560 by task kunit_try_catch/209 [ 12.674576] [ 12.674663] CPU: 0 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.674706] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.674717] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.674737] Call Trace: [ 12.674750] <TASK> [ 12.674764] dump_stack_lvl+0x73/0xb0 [ 12.674790] print_report+0xd1/0x610 [ 12.674810] ? __virt_addr_valid+0x1db/0x2d0 [ 12.674832] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.674851] ? kfree_sensitive+0x2e/0x90 [ 12.674871] kasan_report_invalid_free+0x10a/0x130 [ 12.674894] ? kfree_sensitive+0x2e/0x90 [ 12.674954] ? kfree_sensitive+0x2e/0x90 [ 12.674973] check_slab_allocation+0x101/0x130 [ 12.674993] __kasan_slab_pre_free+0x28/0x40 [ 12.675013] kfree+0xf0/0x3f0 [ 12.675033] ? kfree_sensitive+0x2e/0x90 [ 12.675062] kfree_sensitive+0x2e/0x90 [ 12.675081] kmalloc_double_kzfree+0x19c/0x350 [ 12.675102] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.675125] ? __schedule+0x10cc/0x2b60 [ 12.675146] ? __pfx_read_tsc+0x10/0x10 [ 12.675165] ? ktime_get_ts64+0x86/0x230 [ 12.675188] kunit_try_run_case+0x1a5/0x480 [ 12.675210] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.675232] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.675254] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.675276] ? __kthread_parkme+0x82/0x180 [ 12.675294] ? preempt_count_sub+0x50/0x80 [ 12.675316] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.675339] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.675360] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.675393] kthread+0x337/0x6f0 [ 12.675411] ? trace_preempt_on+0x20/0xc0 [ 12.675432] ? __pfx_kthread+0x10/0x10 [ 12.675692] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.675721] ? calculate_sigpending+0x7b/0xa0 [ 12.675744] ? __pfx_kthread+0x10/0x10 [ 12.675765] ret_from_fork+0x116/0x1d0 [ 12.675783] ? __pfx_kthread+0x10/0x10 [ 12.675802] ret_from_fork_asm+0x1a/0x30 [ 12.675831] </TASK> [ 12.675841] [ 12.685840] Allocated by task 209: [ 12.686030] kasan_save_stack+0x45/0x70 [ 12.686221] kasan_save_track+0x18/0x40 [ 12.686356] kasan_save_alloc_info+0x3b/0x50 [ 12.686573] __kasan_kmalloc+0xb7/0xc0 [ 12.686762] __kmalloc_cache_noprof+0x189/0x420 [ 12.687730] kmalloc_double_kzfree+0xa9/0x350 [ 12.687927] kunit_try_run_case+0x1a5/0x480 [ 12.688223] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.688673] kthread+0x337/0x6f0 [ 12.688870] ret_from_fork+0x116/0x1d0 [ 12.689136] ret_from_fork_asm+0x1a/0x30 [ 12.689370] [ 12.689608] Freed by task 209: [ 12.689767] kasan_save_stack+0x45/0x70 [ 12.690071] kasan_save_track+0x18/0x40 [ 12.690219] kasan_save_free_info+0x3f/0x60 [ 12.690589] __kasan_slab_free+0x56/0x70 [ 12.690786] kfree+0x222/0x3f0 [ 12.691285] kfree_sensitive+0x67/0x90 [ 12.691534] kmalloc_double_kzfree+0x12b/0x350 [ 12.691828] kunit_try_run_case+0x1a5/0x480 [ 12.692195] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.692420] kthread+0x337/0x6f0 [ 12.692598] ret_from_fork+0x116/0x1d0 [ 12.693005] ret_from_fork_asm+0x1a/0x30 [ 12.693282] [ 12.693567] The buggy address belongs to the object at ffff888101d1f560 [ 12.693567] which belongs to the cache kmalloc-16 of size 16 [ 12.694224] The buggy address is located 0 bytes inside of [ 12.694224] 16-byte region [ffff888101d1f560, ffff888101d1f570) [ 12.694807] [ 12.695095] The buggy address belongs to the physical page: [ 12.695307] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101d1f [ 12.695643] flags: 0x200000000000000(node=0|zone=2) [ 12.695861] page_type: f5(slab) [ 12.696007] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.696705] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.697088] page dumped because: kasan: bad access detected [ 12.697266] [ 12.697493] Memory state around the buggy address: [ 12.697761] ffff888101d1f400: 00 02 fc fc 00 02 fc fc 00 02 fc fc fa fb fc fc [ 12.698298] ffff888101d1f480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.698755] >ffff888101d1f500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.699093] ^ [ 12.699467] ffff888101d1f580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.699939] ffff888101d1f600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.700463] ==================================================================