Date
July 5, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.245729] ================================================================== [ 19.245879] BUG: KASAN: double-free in kfree_sensitive+0x3c/0xb0 [ 19.245992] Free of addr fff00000c56728e0 by task kunit_try_catch/193 [ 19.247188] [ 19.247413] CPU: 0 UID: 0 PID: 193 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.247604] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.247670] Hardware name: linux,dummy-virt (DT) [ 19.247739] Call trace: [ 19.248623] show_stack+0x20/0x38 (C) [ 19.249202] dump_stack_lvl+0x8c/0xd0 [ 19.250037] print_report+0x118/0x608 [ 19.250560] kasan_report_invalid_free+0xc0/0xe8 [ 19.250723] check_slab_allocation+0xd4/0x108 [ 19.250814] __kasan_slab_pre_free+0x2c/0x48 [ 19.250911] kfree+0xe8/0x3c8 [ 19.252220] kfree_sensitive+0x3c/0xb0 [ 19.252486] kmalloc_double_kzfree+0x168/0x308 [ 19.253015] kunit_try_run_case+0x170/0x3f0 [ 19.253520] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.254155] kthread+0x328/0x630 [ 19.254319] ret_from_fork+0x10/0x20 [ 19.255165] [ 19.255266] Allocated by task 193: [ 19.255401] kasan_save_stack+0x3c/0x68 [ 19.256035] kasan_save_track+0x20/0x40 [ 19.256245] kasan_save_alloc_info+0x40/0x58 [ 19.256341] __kasan_kmalloc+0xd4/0xd8 [ 19.256443] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.256534] kmalloc_double_kzfree+0xb8/0x308 [ 19.256617] kunit_try_run_case+0x170/0x3f0 [ 19.256705] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.256803] kthread+0x328/0x630 [ 19.256878] ret_from_fork+0x10/0x20 [ 19.256961] [ 19.257003] Freed by task 193: [ 19.257062] kasan_save_stack+0x3c/0x68 [ 19.257874] kasan_save_track+0x20/0x40 [ 19.258634] kasan_save_free_info+0x4c/0x78 [ 19.258744] __kasan_slab_free+0x6c/0x98 [ 19.259429] kfree+0x214/0x3c8 [ 19.259603] kfree_sensitive+0x80/0xb0 [ 19.260494] kmalloc_double_kzfree+0x11c/0x308 [ 19.260666] kunit_try_run_case+0x170/0x3f0 [ 19.260757] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.260850] kthread+0x328/0x630 [ 19.260929] ret_from_fork+0x10/0x20 [ 19.261015] [ 19.261060] The buggy address belongs to the object at fff00000c56728e0 [ 19.261060] which belongs to the cache kmalloc-16 of size 16 [ 19.261193] The buggy address is located 0 bytes inside of [ 19.261193] 16-byte region [fff00000c56728e0, fff00000c56728f0) [ 19.261331] [ 19.261397] The buggy address belongs to the physical page: [ 19.261473] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105672 [ 19.261589] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.261698] page_type: f5(slab) [ 19.261783] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.261896] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.261993] page dumped because: kasan: bad access detected [ 19.262068] [ 19.262110] Memory state around the buggy address: [ 19.262182] fff00000c5672780: 00 03 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.262280] fff00000c5672800: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.264236] >fff00000c5672880: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.264374] ^ [ 19.264962] fff00000c5672900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.265048] fff00000c5672980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.265102] ==================================================================
[ 14.031736] ================================================================== [ 14.032301] BUG: KASAN: double-free in kfree_sensitive+0x2e/0x90 [ 14.032558] Free of addr ffff8881018868c0 by task kunit_try_catch/209 [ 14.033333] [ 14.033705] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 14.033808] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.033824] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.033850] Call Trace: [ 14.033867] <TASK> [ 14.033888] dump_stack_lvl+0x73/0xb0 [ 14.033925] print_report+0xd1/0x650 [ 14.033951] ? __virt_addr_valid+0x1db/0x2d0 [ 14.033979] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.034004] ? kfree_sensitive+0x2e/0x90 [ 14.034029] kasan_report_invalid_free+0x10a/0x130 [ 14.034057] ? kfree_sensitive+0x2e/0x90 [ 14.034082] ? kfree_sensitive+0x2e/0x90 [ 14.034105] check_slab_allocation+0x101/0x130 [ 14.034130] __kasan_slab_pre_free+0x28/0x40 [ 14.034154] kfree+0xf0/0x3f0 [ 14.034179] ? add_taint+0x2e/0xa0 [ 14.034200] ? kfree_sensitive+0x2e/0x90 [ 14.034226] kfree_sensitive+0x2e/0x90 [ 14.034249] kmalloc_double_kzfree+0x19c/0x350 [ 14.034278] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 14.034309] ? __schedule+0x10cc/0x2b60 [ 14.034337] ? __pfx_read_tsc+0x10/0x10 [ 14.034362] ? ktime_get_ts64+0x86/0x230 [ 14.034390] kunit_try_run_case+0x1a5/0x480 [ 14.034429] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.034454] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.034483] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.034509] ? __kthread_parkme+0x82/0x180 [ 14.034531] ? preempt_count_sub+0x50/0x80 [ 14.034560] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.034587] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.034613] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.034639] kthread+0x337/0x6f0 [ 14.034677] ? trace_preempt_on+0x20/0xc0 [ 14.034704] ? __pfx_kthread+0x10/0x10 [ 14.034728] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.034752] ? calculate_sigpending+0x7b/0xa0 [ 14.034795] ? __pfx_kthread+0x10/0x10 [ 14.034820] ret_from_fork+0x116/0x1d0 [ 14.034841] ? __pfx_kthread+0x10/0x10 [ 14.034866] ret_from_fork_asm+0x1a/0x30 [ 14.034901] </TASK> [ 14.034915] [ 14.049027] Allocated by task 209: [ 14.049247] kasan_save_stack+0x45/0x70 [ 14.049461] kasan_save_track+0x18/0x40 [ 14.049684] kasan_save_alloc_info+0x3b/0x50 [ 14.049859] __kasan_kmalloc+0xb7/0xc0 [ 14.050014] __kmalloc_cache_noprof+0x189/0x420 [ 14.050202] kmalloc_double_kzfree+0xa9/0x350 [ 14.050456] kunit_try_run_case+0x1a5/0x480 [ 14.050993] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.051277] kthread+0x337/0x6f0 [ 14.051431] ret_from_fork+0x116/0x1d0 [ 14.051676] ret_from_fork_asm+0x1a/0x30 [ 14.052093] [ 14.052205] Freed by task 209: [ 14.052403] kasan_save_stack+0x45/0x70 [ 14.052614] kasan_save_track+0x18/0x40 [ 14.052915] kasan_save_free_info+0x3f/0x60 [ 14.053141] __kasan_slab_free+0x56/0x70 [ 14.053374] kfree+0x222/0x3f0 [ 14.053551] kfree_sensitive+0x67/0x90 [ 14.053738] kmalloc_double_kzfree+0x12b/0x350 [ 14.054242] kunit_try_run_case+0x1a5/0x480 [ 14.054467] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.054747] kthread+0x337/0x6f0 [ 14.054966] ret_from_fork+0x116/0x1d0 [ 14.055195] ret_from_fork_asm+0x1a/0x30 [ 14.055383] [ 14.055500] The buggy address belongs to the object at ffff8881018868c0 [ 14.055500] which belongs to the cache kmalloc-16 of size 16 [ 14.056374] The buggy address is located 0 bytes inside of [ 14.056374] 16-byte region [ffff8881018868c0, ffff8881018868d0) [ 14.056827] [ 14.056948] The buggy address belongs to the physical page: [ 14.057373] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101886 [ 14.057805] flags: 0x200000000000000(node=0|zone=2) [ 14.058082] page_type: f5(slab) [ 14.058297] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 14.058734] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 14.059158] page dumped because: kasan: bad access detected [ 14.059423] [ 14.059510] Memory state around the buggy address: [ 14.059843] ffff888101886780: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 14.060225] ffff888101886800: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 14.060521] >ffff888101886880: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 14.060790] ^ [ 14.060994] ffff888101886900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.061373] ffff888101886980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.061770] ==================================================================