Date
July 25, 2025, 3:13 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.585786] ================================================================== [ 32.585858] BUG: KASAN: double-free in kfree_sensitive+0x3c/0xb0 [ 32.585920] Free of addr fff00000c85ecee0 by task kunit_try_catch/224 [ 32.585964] [ 32.585997] CPU: 1 UID: 0 PID: 224 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250725 #1 PREEMPT [ 32.586084] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 32.586133] Hardware name: linux,dummy-virt (DT) [ 32.586165] Call trace: [ 32.586188] show_stack+0x20/0x38 (C) [ 32.586237] dump_stack_lvl+0x8c/0xd0 [ 32.586281] print_report+0x118/0x5e8 [ 32.586326] kasan_report_invalid_free+0xc0/0xe8 [ 32.586373] check_slab_allocation+0xd4/0x108 [ 32.586419] __kasan_slab_pre_free+0x2c/0x48 [ 32.586470] kfree+0xe8/0x3c8 [ 32.586513] kfree_sensitive+0x3c/0xb0 [ 32.586559] kmalloc_double_kzfree+0x168/0x308 [ 32.586607] kunit_try_run_case+0x170/0x3f0 [ 32.586665] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.586717] kthread+0x328/0x630 [ 32.586758] ret_from_fork+0x10/0x20 [ 32.586806] [ 32.586824] Allocated by task 224: [ 32.586851] kasan_save_stack+0x3c/0x68 [ 32.586889] kasan_save_track+0x20/0x40 [ 32.586923] kasan_save_alloc_info+0x40/0x58 [ 32.588311] __kasan_kmalloc+0xd4/0xd8 [ 32.588504] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.589001] kmalloc_double_kzfree+0xb8/0x308 [ 32.589100] kunit_try_run_case+0x170/0x3f0 [ 32.589276] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.589671] kthread+0x328/0x630 [ 32.590176] ret_from_fork+0x10/0x20 [ 32.590295] [ 32.590368] Freed by task 224: [ 32.590398] kasan_save_stack+0x3c/0x68 [ 32.590601] kasan_save_track+0x20/0x40 [ 32.590946] kasan_save_free_info+0x4c/0x78 [ 32.591068] __kasan_slab_free+0x7c/0xa8 [ 32.591305] kfree+0x214/0x3c8 [ 32.591449] kfree_sensitive+0x80/0xb0 [ 32.591567] kmalloc_double_kzfree+0x11c/0x308 [ 32.591711] kunit_try_run_case+0x170/0x3f0 [ 32.591870] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.591955] kthread+0x328/0x630 [ 32.591996] ret_from_fork+0x10/0x20 [ 32.592159] [ 32.592371] The buggy address belongs to the object at fff00000c85ecee0 [ 32.592371] which belongs to the cache kmalloc-16 of size 16 [ 32.592590] The buggy address is located 0 bytes inside of [ 32.592590] 16-byte region [fff00000c85ecee0, fff00000c85ecef0) [ 32.592724] [ 32.592746] The buggy address belongs to the physical page: [ 32.593118] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1085ec [ 32.593236] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.593303] page_type: f5(slab) [ 32.593339] raw: 0bfffe0000000000 fff00000c0001640 dead000000000100 dead000000000122 [ 32.594072] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 32.594491] page dumped because: kasan: bad access detected [ 32.594650] [ 32.594674] Memory state around the buggy address: [ 32.594760] fff00000c85ecd80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.595255] fff00000c85ece00: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 32.595528] >fff00000c85ece80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.595615] ^ [ 32.595724] fff00000c85ecf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.595987] fff00000c85ecf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.596151] ==================================================================
[ 26.160896] ================================================================== [ 26.161978] BUG: KASAN: double-free in kfree_sensitive+0x2e/0x90 [ 26.162609] Free of addr ffff8881057d7660 by task kunit_try_catch/241 [ 26.163516] [ 26.163619] CPU: 0 UID: 0 PID: 241 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250725 #1 PREEMPT(voluntary) [ 26.163670] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.163683] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.163703] Call Trace: [ 26.163717] <TASK> [ 26.163735] dump_stack_lvl+0x73/0xb0 [ 26.163766] print_report+0xd1/0x640 [ 26.163961] ? __virt_addr_valid+0x1db/0x2d0 [ 26.163994] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.164022] ? kfree_sensitive+0x2e/0x90 [ 26.164043] kasan_report_invalid_free+0x10a/0x130 [ 26.164069] ? kfree_sensitive+0x2e/0x90 [ 26.164145] ? kfree_sensitive+0x2e/0x90 [ 26.164165] check_slab_allocation+0x101/0x130 [ 26.164188] __kasan_slab_pre_free+0x28/0x40 [ 26.164209] kfree+0xf0/0x3f0 [ 26.164232] ? kfree_sensitive+0x2e/0x90 [ 26.164254] kfree_sensitive+0x2e/0x90 [ 26.164274] kmalloc_double_kzfree+0x19c/0x350 [ 26.164298] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 26.164322] ? __schedule+0x10da/0x2b60 [ 26.164344] ? __pfx_read_tsc+0x10/0x10 [ 26.164367] ? ktime_get_ts64+0x86/0x230 [ 26.164391] kunit_try_run_case+0x1a5/0x480 [ 26.164416] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.164439] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 26.164461] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.164488] ? __kthread_parkme+0x82/0x180 [ 26.164508] ? preempt_count_sub+0x50/0x80 [ 26.164531] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.164556] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.164579] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.164603] kthread+0x337/0x6f0 [ 26.164623] ? trace_preempt_on+0x20/0xc0 [ 26.164647] ? __pfx_kthread+0x10/0x10 [ 26.164668] ? _raw_spin_unlock_irq+0x47/0x80 [ 26.164693] ? calculate_sigpending+0x7b/0xa0 [ 26.164716] ? __pfx_kthread+0x10/0x10 [ 26.164738] ret_from_fork+0x116/0x1d0 [ 26.164758] ? __pfx_kthread+0x10/0x10 [ 26.164778] ret_from_fork_asm+0x1a/0x30 [ 26.164820] </TASK> [ 26.164832] [ 26.178401] Allocated by task 241: [ 26.178637] kasan_save_stack+0x45/0x70 [ 26.178782] kasan_save_track+0x18/0x40 [ 26.179209] kasan_save_alloc_info+0x3b/0x50 [ 26.179601] __kasan_kmalloc+0xb7/0xc0 [ 26.179906] __kmalloc_cache_noprof+0x189/0x420 [ 26.180342] kmalloc_double_kzfree+0xa9/0x350 [ 26.180505] kunit_try_run_case+0x1a5/0x480 [ 26.180653] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.180861] kthread+0x337/0x6f0 [ 26.180992] ret_from_fork+0x116/0x1d0 [ 26.181319] ret_from_fork_asm+0x1a/0x30 [ 26.181497] [ 26.181571] Freed by task 241: [ 26.181693] kasan_save_stack+0x45/0x70 [ 26.181884] kasan_save_track+0x18/0x40 [ 26.182126] kasan_save_free_info+0x3f/0x60 [ 26.182306] __kasan_slab_free+0x5e/0x80 [ 26.182480] kfree+0x222/0x3f0 [ 26.182595] kfree_sensitive+0x67/0x90 [ 26.182726] kmalloc_double_kzfree+0x12b/0x350 [ 26.182939] kunit_try_run_case+0x1a5/0x480 [ 26.183263] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.183553] kthread+0x337/0x6f0 [ 26.183717] ret_from_fork+0x116/0x1d0 [ 26.184065] ret_from_fork_asm+0x1a/0x30 [ 26.184248] [ 26.184335] The buggy address belongs to the object at ffff8881057d7660 [ 26.184335] which belongs to the cache kmalloc-16 of size 16 [ 26.184788] The buggy address is located 0 bytes inside of [ 26.184788] 16-byte region [ffff8881057d7660, ffff8881057d7670) [ 26.185336] [ 26.185413] The buggy address belongs to the physical page: [ 26.185609] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057d7 [ 26.185974] flags: 0x200000000000000(node=0|zone=2) [ 26.186203] page_type: f5(slab) [ 26.186413] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 26.186658] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 26.187414] page dumped because: kasan: bad access detected [ 26.187638] [ 26.187729] Memory state around the buggy address: [ 26.187936] ffff8881057d7500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.188271] ffff8881057d7580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.188537] >ffff8881057d7600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.188908] ^ [ 26.189198] ffff8881057d7680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.189474] ffff8881057d7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.189766] ==================================================================