Date
July 23, 2025, 3:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.229832] ================================================================== [ 31.229964] BUG: KASAN: double-free in kfree_sensitive+0x3c/0xb0 [ 31.230051] Free of addr fff00000c8603ee0 by task kunit_try_catch/225 [ 31.230240] [ 31.230324] CPU: 0 UID: 0 PID: 225 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250723 #1 PREEMPT [ 31.230427] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 31.230456] Hardware name: linux,dummy-virt (DT) [ 31.230993] Call trace: [ 31.231168] show_stack+0x20/0x38 (C) [ 31.231268] dump_stack_lvl+0x8c/0xd0 [ 31.231467] print_report+0x118/0x5e8 [ 31.231530] kasan_report_invalid_free+0xc0/0xe8 [ 31.231577] check_slab_allocation+0xd4/0x108 [ 31.231758] __kasan_slab_pre_free+0x2c/0x48 [ 31.231843] kfree+0xe8/0x3c8 [ 31.232048] kfree_sensitive+0x3c/0xb0 [ 31.232115] kmalloc_double_kzfree+0x168/0x308 [ 31.232164] kunit_try_run_case+0x170/0x3f0 [ 31.232536] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.232615] kthread+0x328/0x630 [ 31.232660] ret_from_fork+0x10/0x20 [ 31.232723] [ 31.232926] Allocated by task 225: [ 31.233139] kasan_save_stack+0x3c/0x68 [ 31.233297] kasan_save_track+0x20/0x40 [ 31.233359] kasan_save_alloc_info+0x40/0x58 [ 31.233658] __kasan_kmalloc+0xd4/0xd8 [ 31.233846] __kmalloc_cache_noprof+0x16c/0x3c0 [ 31.234138] kmalloc_double_kzfree+0xb8/0x308 [ 31.234314] kunit_try_run_case+0x170/0x3f0 [ 31.234382] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.234428] kthread+0x328/0x630 [ 31.234468] ret_from_fork+0x10/0x20 [ 31.234505] [ 31.234526] Freed by task 225: [ 31.234591] kasan_save_stack+0x3c/0x68 [ 31.234639] kasan_save_track+0x20/0x40 [ 31.234685] kasan_save_free_info+0x4c/0x78 [ 31.234723] __kasan_slab_free+0x6c/0x98 [ 31.234758] kfree+0x214/0x3c8 [ 31.234803] kfree_sensitive+0x80/0xb0 [ 31.234842] kmalloc_double_kzfree+0x11c/0x308 [ 31.234884] kunit_try_run_case+0x170/0x3f0 [ 31.234944] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.234994] kthread+0x328/0x630 [ 31.235028] ret_from_fork+0x10/0x20 [ 31.235065] [ 31.235089] The buggy address belongs to the object at fff00000c8603ee0 [ 31.235089] which belongs to the cache kmalloc-16 of size 16 [ 31.235151] The buggy address is located 0 bytes inside of [ 31.235151] 16-byte region [fff00000c8603ee0, fff00000c8603ef0) [ 31.235217] [ 31.235247] The buggy address belongs to the physical page: [ 31.235292] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xfff00000c8603e00 pfn:0x108603 [ 31.235351] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.235410] page_type: f5(slab) [ 31.235466] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 31.235527] raw: fff00000c8603e00 000000008080007f 00000000f5000000 0000000000000000 [ 31.235585] page dumped because: kasan: bad access detected [ 31.235616] [ 31.235646] Memory state around the buggy address: [ 31.235687] fff00000c8603d80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.235739] fff00000c8603e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.235797] >fff00000c8603e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.235836] ^ [ 31.235887] fff00000c8603f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.236396] fff00000c8603f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.236518] ==================================================================
[ 25.567965] ================================================================== [ 25.568385] BUG: KASAN: double-free in kfree_sensitive+0x2e/0x90 [ 25.569109] Free of addr ffff8881046316c0 by task kunit_try_catch/241 [ 25.570080] [ 25.570278] CPU: 1 UID: 0 PID: 241 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250723 #1 PREEMPT(voluntary) [ 25.570332] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.570345] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.570367] Call Trace: [ 25.570390] <TASK> [ 25.570413] dump_stack_lvl+0x73/0xb0 [ 25.570507] print_report+0xd1/0x640 [ 25.570532] ? __virt_addr_valid+0x1db/0x2d0 [ 25.570569] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.570594] ? kfree_sensitive+0x2e/0x90 [ 25.570617] kasan_report_invalid_free+0x10a/0x130 [ 25.570641] ? kfree_sensitive+0x2e/0x90 [ 25.570662] ? kfree_sensitive+0x2e/0x90 [ 25.570682] check_slab_allocation+0x101/0x130 [ 25.570703] __kasan_slab_pre_free+0x28/0x40 [ 25.570724] kfree+0xf0/0x3f0 [ 25.570746] ? kfree_sensitive+0x2e/0x90 [ 25.570767] kfree_sensitive+0x2e/0x90 [ 25.570787] kmalloc_double_kzfree+0x19c/0x350 [ 25.570810] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 25.570833] ? __schedule+0x10da/0x2b60 [ 25.570858] ? __pfx_read_tsc+0x10/0x10 [ 25.570880] ? ktime_get_ts64+0x86/0x230 [ 25.570904] kunit_try_run_case+0x1a5/0x480 [ 25.570946] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.570969] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.570993] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.571017] ? __kthread_parkme+0x82/0x180 [ 25.571037] ? preempt_count_sub+0x50/0x80 [ 25.571060] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.571083] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.571106] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.571129] kthread+0x337/0x6f0 [ 25.571157] ? trace_preempt_on+0x20/0xc0 [ 25.571180] ? __pfx_kthread+0x10/0x10 [ 25.571200] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.571223] ? calculate_sigpending+0x7b/0xa0 [ 25.571247] ? __pfx_kthread+0x10/0x10 [ 25.571268] ret_from_fork+0x116/0x1d0 [ 25.571287] ? __pfx_kthread+0x10/0x10 [ 25.571307] ret_from_fork_asm+0x1a/0x30 [ 25.571338] </TASK> [ 25.571349] [ 25.585617] Allocated by task 241: [ 25.586218] kasan_save_stack+0x45/0x70 [ 25.586842] kasan_save_track+0x18/0x40 [ 25.587381] kasan_save_alloc_info+0x3b/0x50 [ 25.587963] __kasan_kmalloc+0xb7/0xc0 [ 25.588336] __kmalloc_cache_noprof+0x189/0x420 [ 25.588510] kmalloc_double_kzfree+0xa9/0x350 [ 25.588659] kunit_try_run_case+0x1a5/0x480 [ 25.588802] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.588975] kthread+0x337/0x6f0 [ 25.589092] ret_from_fork+0x116/0x1d0 [ 25.589286] ret_from_fork_asm+0x1a/0x30 [ 25.589443] [ 25.589510] Freed by task 241: [ 25.589617] kasan_save_stack+0x45/0x70 [ 25.589795] kasan_save_track+0x18/0x40 [ 25.589983] kasan_save_free_info+0x3f/0x60 [ 25.590221] __kasan_slab_free+0x56/0x70 [ 25.590849] kfree+0x222/0x3f0 [ 25.591295] kfree_sensitive+0x67/0x90 [ 25.591790] kmalloc_double_kzfree+0x12b/0x350 [ 25.592232] kunit_try_run_case+0x1a5/0x480 [ 25.592612] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.592855] kthread+0x337/0x6f0 [ 25.593235] ret_from_fork+0x116/0x1d0 [ 25.593553] ret_from_fork_asm+0x1a/0x30 [ 25.593712] [ 25.593781] The buggy address belongs to the object at ffff8881046316c0 [ 25.593781] which belongs to the cache kmalloc-16 of size 16 [ 25.594215] The buggy address is located 0 bytes inside of [ 25.594215] 16-byte region [ffff8881046316c0, ffff8881046316d0) [ 25.595267] [ 25.595405] The buggy address belongs to the physical page: [ 25.595899] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104631 [ 25.596845] flags: 0x200000000000000(node=0|zone=2) [ 25.597296] page_type: f5(slab) [ 25.597609] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 25.597847] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 25.598102] page dumped because: kasan: bad access detected [ 25.598279] [ 25.598353] Memory state around the buggy address: [ 25.599051] ffff888104631580: 00 06 fc fc 00 06 fc fc fa fb fc fc fa fb fc fc [ 25.600179] ffff888104631600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.601099] >ffff888104631680: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 25.602235] ^ [ 25.602776] ffff888104631700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.603649] ffff888104631780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.604144] ==================================================================