Date
July 18, 2025, 1:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.705970] ================================================================== [ 31.706104] BUG: KASAN: double-free in kfree_sensitive+0x3c/0xb0 [ 31.706179] Free of addr fff00000c907e100 by task kunit_try_catch/223 [ 31.706222] [ 31.706281] CPU: 0 UID: 0 PID: 223 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT [ 31.706510] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.706542] Hardware name: linux,dummy-virt (DT) [ 31.706584] Call trace: [ 31.706609] show_stack+0x20/0x38 (C) [ 31.706661] dump_stack_lvl+0x8c/0xd0 [ 31.706708] print_report+0x118/0x5e8 [ 31.706750] kasan_report_invalid_free+0xc0/0xe8 [ 31.706802] check_slab_allocation+0xd4/0x108 [ 31.706847] __kasan_slab_pre_free+0x2c/0x48 [ 31.706891] kfree+0xe8/0x3c8 [ 31.706934] kfree_sensitive+0x3c/0xb0 [ 31.706999] kmalloc_double_kzfree+0x168/0x308 [ 31.707047] kunit_try_run_case+0x170/0x3f0 [ 31.707132] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.707186] kthread+0x328/0x630 [ 31.707769] ret_from_fork+0x10/0x20 [ 31.707845] [ 31.707893] Allocated by task 223: [ 31.707937] kasan_save_stack+0x3c/0x68 [ 31.708060] kasan_save_track+0x20/0x40 [ 31.708147] kasan_save_alloc_info+0x40/0x58 [ 31.708282] __kasan_kmalloc+0xd4/0xd8 [ 31.708480] __kmalloc_cache_noprof+0x16c/0x3c0 [ 31.708550] kmalloc_double_kzfree+0xb8/0x308 [ 31.708711] kunit_try_run_case+0x170/0x3f0 [ 31.708776] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.708882] kthread+0x328/0x630 [ 31.708943] ret_from_fork+0x10/0x20 [ 31.709104] [ 31.709164] Freed by task 223: [ 31.709210] kasan_save_stack+0x3c/0x68 [ 31.709350] kasan_save_track+0x20/0x40 [ 31.709438] kasan_save_free_info+0x4c/0x78 [ 31.709749] __kasan_slab_free+0x6c/0x98 [ 31.709819] kfree+0x214/0x3c8 [ 31.709884] kfree_sensitive+0x80/0xb0 [ 31.710004] kmalloc_double_kzfree+0x11c/0x308 [ 31.710155] kunit_try_run_case+0x170/0x3f0 [ 31.710222] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.710300] kthread+0x328/0x630 [ 31.710398] ret_from_fork+0x10/0x20 [ 31.710446] [ 31.710466] The buggy address belongs to the object at fff00000c907e100 [ 31.710466] which belongs to the cache kmalloc-16 of size 16 [ 31.710838] The buggy address is located 0 bytes inside of [ 31.710838] 16-byte region [fff00000c907e100, fff00000c907e110) [ 31.710921] [ 31.711282] The buggy address belongs to the physical page: [ 31.711346] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xfff00000c907e020 pfn:0x10907e [ 31.711513] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.711612] page_type: f5(slab) [ 31.711667] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 31.711791] raw: fff00000c907e020 000000008080007f 00000000f5000000 0000000000000000 [ 31.711872] page dumped because: kasan: bad access detected [ 31.711922] [ 31.711940] Memory state around the buggy address: [ 31.711973] fff00000c907e000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.712019] fff00000c907e080: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.712067] >fff00000c907e100: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.712114] ^ [ 31.712541] fff00000c907e180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.712619] fff00000c907e200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.712747] ==================================================================
[ 25.195525] ================================================================== [ 25.195925] BUG: KASAN: double-free in kfree_sensitive+0x2e/0x90 [ 25.196167] Free of addr ffff888105380c40 by task kunit_try_catch/240 [ 25.196613] [ 25.196748] CPU: 0 UID: 0 PID: 240 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT(voluntary) [ 25.196797] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.197010] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.197032] Call Trace: [ 25.197043] <TASK> [ 25.197059] dump_stack_lvl+0x73/0xb0 [ 25.197091] print_report+0xd1/0x640 [ 25.197134] ? __virt_addr_valid+0x1db/0x2d0 [ 25.197157] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.197181] ? kfree_sensitive+0x2e/0x90 [ 25.197201] kasan_report_invalid_free+0x10a/0x130 [ 25.197236] ? kfree_sensitive+0x2e/0x90 [ 25.197256] ? kfree_sensitive+0x2e/0x90 [ 25.197274] check_slab_allocation+0x101/0x130 [ 25.197312] __kasan_slab_pre_free+0x28/0x40 [ 25.197333] kfree+0xf0/0x3f0 [ 25.197353] ? add_taint+0x2e/0xa0 [ 25.197376] ? kfree_sensitive+0x2e/0x90 [ 25.197396] kfree_sensitive+0x2e/0x90 [ 25.197415] kmalloc_double_kzfree+0x19c/0x350 [ 25.197437] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 25.197458] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 25.197498] ? trace_hardirqs_on+0x37/0xe0 [ 25.197534] ? __pfx_read_tsc+0x10/0x10 [ 25.197555] ? ktime_get_ts64+0x86/0x230 [ 25.197592] kunit_try_run_case+0x1a5/0x480 [ 25.197628] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.197664] ? queued_spin_lock_slowpath+0x116/0xb40 [ 25.197699] ? __kthread_parkme+0x82/0x180 [ 25.197731] ? preempt_count_sub+0x50/0x80 [ 25.197766] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.197789] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.197863] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.197886] kthread+0x337/0x6f0 [ 25.197904] ? trace_preempt_on+0x20/0xc0 [ 25.197926] ? __pfx_kthread+0x10/0x10 [ 25.197945] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.197977] ? calculate_sigpending+0x7b/0xa0 [ 25.198004] ? __pfx_kthread+0x10/0x10 [ 25.198026] ret_from_fork+0x116/0x1d0 [ 25.198045] ? __pfx_kthread+0x10/0x10 [ 25.198064] ret_from_fork_asm+0x1a/0x30 [ 25.198094] </TASK> [ 25.198105] [ 25.209779] Allocated by task 240: [ 25.209987] kasan_save_stack+0x45/0x70 [ 25.210179] kasan_save_track+0x18/0x40 [ 25.210359] kasan_save_alloc_info+0x3b/0x50 [ 25.210541] __kasan_kmalloc+0xb7/0xc0 [ 25.210730] __kmalloc_cache_noprof+0x189/0x420 [ 25.210915] kmalloc_double_kzfree+0xa9/0x350 [ 25.211121] kunit_try_run_case+0x1a5/0x480 [ 25.211735] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.211985] kthread+0x337/0x6f0 [ 25.212489] ret_from_fork+0x116/0x1d0 [ 25.212626] ret_from_fork_asm+0x1a/0x30 [ 25.213025] [ 25.213120] Freed by task 240: [ 25.213374] kasan_save_stack+0x45/0x70 [ 25.213664] kasan_save_track+0x18/0x40 [ 25.213866] kasan_save_free_info+0x3f/0x60 [ 25.214348] __kasan_slab_free+0x56/0x70 [ 25.214510] kfree+0x222/0x3f0 [ 25.214668] kfree_sensitive+0x67/0x90 [ 25.215026] kmalloc_double_kzfree+0x12b/0x350 [ 25.215398] kunit_try_run_case+0x1a5/0x480 [ 25.215600] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.216044] kthread+0x337/0x6f0 [ 25.216204] ret_from_fork+0x116/0x1d0 [ 25.216376] ret_from_fork_asm+0x1a/0x30 [ 25.216525] [ 25.216618] The buggy address belongs to the object at ffff888105380c40 [ 25.216618] which belongs to the cache kmalloc-16 of size 16 [ 25.217561] The buggy address is located 0 bytes inside of [ 25.217561] 16-byte region [ffff888105380c40, ffff888105380c50) [ 25.217986] [ 25.218122] The buggy address belongs to the physical page: [ 25.218584] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105380 [ 25.219099] flags: 0x200000000000000(node=0|zone=2) [ 25.219350] page_type: f5(slab) [ 25.219482] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 25.219792] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 25.220354] page dumped because: kasan: bad access detected [ 25.220600] [ 25.220683] Memory state around the buggy address: [ 25.221151] ffff888105380b00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.221461] ffff888105380b80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.221752] >ffff888105380c00: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 25.222178] ^ [ 25.222416] ffff888105380c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.222693] ffff888105380d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.223330] ==================================================================