Date
July 15, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.090882] ================================================================== [ 18.091370] BUG: KASAN: double-free in kfree_sensitive+0x3c/0xb0 [ 18.091522] Free of addr fff00000c45d8b60 by task kunit_try_catch/194 [ 18.091718] [ 18.091761] CPU: 0 UID: 0 PID: 194 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT [ 18.092088] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.092127] Hardware name: linux,dummy-virt (DT) [ 18.092404] Call trace: [ 18.092442] show_stack+0x20/0x38 (C) [ 18.092496] dump_stack_lvl+0x8c/0xd0 [ 18.092571] print_report+0x118/0x5d0 [ 18.092617] kasan_report_invalid_free+0xc0/0xe8 [ 18.092829] check_slab_allocation+0xd4/0x108 [ 18.092890] __kasan_slab_pre_free+0x2c/0x48 [ 18.092968] kfree+0xe8/0x3c8 [ 18.093094] kfree_sensitive+0x3c/0xb0 [ 18.093160] kmalloc_double_kzfree+0x168/0x308 [ 18.093247] kunit_try_run_case+0x170/0x3f0 [ 18.093487] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.093673] kthread+0x328/0x630 [ 18.093837] ret_from_fork+0x10/0x20 [ 18.093886] [ 18.094081] Allocated by task 194: [ 18.094240] kasan_save_stack+0x3c/0x68 [ 18.094566] kasan_save_track+0x20/0x40 [ 18.094615] kasan_save_alloc_info+0x40/0x58 [ 18.095094] __kasan_kmalloc+0xd4/0xd8 [ 18.095198] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.095345] kmalloc_double_kzfree+0xb8/0x308 [ 18.095597] kunit_try_run_case+0x170/0x3f0 [ 18.095806] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.095968] kthread+0x328/0x630 [ 18.096038] ret_from_fork+0x10/0x20 [ 18.096328] [ 18.096480] Freed by task 194: [ 18.096520] kasan_save_stack+0x3c/0x68 [ 18.096695] kasan_save_track+0x20/0x40 [ 18.096940] kasan_save_free_info+0x4c/0x78 [ 18.097031] __kasan_slab_free+0x6c/0x98 [ 18.097234] kfree+0x214/0x3c8 [ 18.097384] kfree_sensitive+0x80/0xb0 [ 18.097514] kmalloc_double_kzfree+0x11c/0x308 [ 18.097611] kunit_try_run_case+0x170/0x3f0 [ 18.097678] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.097724] kthread+0x328/0x630 [ 18.098003] ret_from_fork+0x10/0x20 [ 18.098211] [ 18.098275] The buggy address belongs to the object at fff00000c45d8b60 [ 18.098275] which belongs to the cache kmalloc-16 of size 16 [ 18.098342] The buggy address is located 0 bytes inside of [ 18.098342] 16-byte region [fff00000c45d8b60, fff00000c45d8b70) [ 18.098620] [ 18.098669] The buggy address belongs to the physical page: [ 18.098814] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1045d8 [ 18.098873] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.099248] page_type: f5(slab) [ 18.099553] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.099828] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.100038] page dumped because: kasan: bad access detected [ 18.100127] [ 18.100305] Memory state around the buggy address: [ 18.100576] fff00000c45d8a00: fa fb fc fc fa fb fc fc 00 01 fc fc fa fb fc fc [ 18.100776] fff00000c45d8a80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.100977] >fff00000c45d8b00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.101049] ^ [ 18.101321] fff00000c45d8b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.101519] fff00000c45d8c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.101698] ==================================================================
[ 11.357825] ================================================================== [ 11.358486] BUG: KASAN: double-free in kfree_sensitive+0x2e/0x90 [ 11.359142] Free of addr ffff8881027e74c0 by task kunit_try_catch/211 [ 11.359619] [ 11.359710] CPU: 1 UID: 0 PID: 211 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT(voluntary) [ 11.359752] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.359762] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.359780] Call Trace: [ 11.359792] <TASK> [ 11.359805] dump_stack_lvl+0x73/0xb0 [ 11.359827] print_report+0xd1/0x610 [ 11.359849] ? __virt_addr_valid+0x1db/0x2d0 [ 11.359869] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.359951] ? kfree_sensitive+0x2e/0x90 [ 11.359976] kasan_report_invalid_free+0x10a/0x130 [ 11.360000] ? kfree_sensitive+0x2e/0x90 [ 11.360021] ? kfree_sensitive+0x2e/0x90 [ 11.360041] check_slab_allocation+0x101/0x130 [ 11.360062] __kasan_slab_pre_free+0x28/0x40 [ 11.360082] kfree+0xf0/0x3f0 [ 11.360100] ? kfree_sensitive+0x2e/0x90 [ 11.360123] kfree_sensitive+0x2e/0x90 [ 11.360143] kmalloc_double_kzfree+0x19c/0x350 [ 11.360161] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 11.360180] ? __schedule+0x207f/0x2b60 [ 11.360202] ? __pfx_read_tsc+0x10/0x10 [ 11.360220] ? ktime_get_ts64+0x86/0x230 [ 11.360243] kunit_try_run_case+0x1a5/0x480 [ 11.360264] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.360281] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.360303] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.360326] ? __kthread_parkme+0x82/0x180 [ 11.360346] ? preempt_count_sub+0x50/0x80 [ 11.360369] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.360388] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.360410] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.360432] kthread+0x337/0x6f0 [ 11.360447] ? trace_preempt_on+0x20/0xc0 [ 11.360469] ? __pfx_kthread+0x10/0x10 [ 11.360485] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.360506] ? calculate_sigpending+0x7b/0xa0 [ 11.360525] ? __pfx_kthread+0x10/0x10 [ 11.360542] ret_from_fork+0x41/0x80 [ 11.360561] ? __pfx_kthread+0x10/0x10 [ 11.360578] ret_from_fork_asm+0x1a/0x30 [ 11.360607] </TASK> [ 11.360616] [ 11.372609] Allocated by task 211: [ 11.372948] kasan_save_stack+0x45/0x70 [ 11.373539] kasan_save_track+0x18/0x40 [ 11.374006] kasan_save_alloc_info+0x3b/0x50 [ 11.374198] __kasan_kmalloc+0xb7/0xc0 [ 11.374373] __kmalloc_cache_noprof+0x189/0x420 [ 11.374576] kmalloc_double_kzfree+0xa9/0x350 [ 11.375133] kunit_try_run_case+0x1a5/0x480 [ 11.375398] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.375826] kthread+0x337/0x6f0 [ 11.376004] ret_from_fork+0x41/0x80 [ 11.376176] ret_from_fork_asm+0x1a/0x30 [ 11.376355] [ 11.376443] Freed by task 211: [ 11.376584] kasan_save_stack+0x45/0x70 [ 11.377254] kasan_save_track+0x18/0x40 [ 11.377465] kasan_save_free_info+0x3f/0x60 [ 11.377635] __kasan_slab_free+0x56/0x70 [ 11.378230] kfree+0x222/0x3f0 [ 11.378384] kfree_sensitive+0x67/0x90 [ 11.378552] kmalloc_double_kzfree+0x12b/0x350 [ 11.379141] kunit_try_run_case+0x1a5/0x480 [ 11.379436] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.379871] kthread+0x337/0x6f0 [ 11.380044] ret_from_fork+0x41/0x80 [ 11.380215] ret_from_fork_asm+0x1a/0x30 [ 11.380400] [ 11.380493] The buggy address belongs to the object at ffff8881027e74c0 [ 11.380493] which belongs to the cache kmalloc-16 of size 16 [ 11.381404] The buggy address is located 0 bytes inside of [ 11.381404] 16-byte region [ffff8881027e74c0, ffff8881027e74d0) [ 11.382434] [ 11.382544] The buggy address belongs to the physical page: [ 11.383260] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027e7 [ 11.383592] flags: 0x200000000000000(node=0|zone=2) [ 11.384053] page_type: f5(slab) [ 11.384238] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.384555] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.385601] page dumped because: kasan: bad access detected [ 11.386216] [ 11.386475] Memory state around the buggy address: [ 11.386824] ffff8881027e7380: 00 04 fc fc 00 04 fc fc 00 01 fc fc 00 01 fc fc [ 11.387142] ffff8881027e7400: 00 04 fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 11.387425] >ffff8881027e7480: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 11.387944] ^ [ 11.388307] ffff8881027e7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.388991] ffff8881027e7580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.389571] ==================================================================