Date
July 9, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.926589] ================================================================== [ 16.926787] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 16.926910] Read of size 1 at addr fff00000c61bc480 by task kunit_try_catch/192 [ 16.927171] [ 16.927214] CPU: 1 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.927684] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.928184] Hardware name: linux,dummy-virt (DT) [ 16.928240] Call trace: [ 16.928285] show_stack+0x20/0x38 (C) [ 16.928535] dump_stack_lvl+0x8c/0xd0 [ 16.928872] print_report+0x118/0x608 [ 16.929153] kasan_report+0xdc/0x128 [ 16.929534] __kasan_check_byte+0x54/0x70 [ 16.930127] kfree_sensitive+0x30/0xb0 [ 16.930220] kmalloc_double_kzfree+0x168/0x308 [ 16.930600] kunit_try_run_case+0x170/0x3f0 [ 16.930669] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.931062] kthread+0x328/0x630 [ 16.931155] ret_from_fork+0x10/0x20 [ 16.931263] [ 16.931343] Allocated by task 192: [ 16.931437] kasan_save_stack+0x3c/0x68 [ 16.931501] kasan_save_track+0x20/0x40 [ 16.931572] kasan_save_alloc_info+0x40/0x58 [ 16.931613] __kasan_kmalloc+0xd4/0xd8 [ 16.931670] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.931711] kmalloc_double_kzfree+0xb8/0x308 [ 16.931750] kunit_try_run_case+0x170/0x3f0 [ 16.931787] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.931840] kthread+0x328/0x630 [ 16.931875] ret_from_fork+0x10/0x20 [ 16.931920] [ 16.931961] Freed by task 192: [ 16.931986] kasan_save_stack+0x3c/0x68 [ 16.932024] kasan_save_track+0x20/0x40 [ 16.932071] kasan_save_free_info+0x4c/0x78 [ 16.932128] __kasan_slab_free+0x6c/0x98 [ 16.932177] kfree+0x214/0x3c8 [ 16.932224] kfree_sensitive+0x80/0xb0 [ 16.932280] kmalloc_double_kzfree+0x11c/0x308 [ 16.932318] kunit_try_run_case+0x170/0x3f0 [ 16.932369] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.932420] kthread+0x328/0x630 [ 16.932452] ret_from_fork+0x10/0x20 [ 16.932488] [ 16.932507] The buggy address belongs to the object at fff00000c61bc480 [ 16.932507] which belongs to the cache kmalloc-16 of size 16 [ 16.932574] The buggy address is located 0 bytes inside of [ 16.932574] freed 16-byte region [fff00000c61bc480, fff00000c61bc490) [ 16.932634] [ 16.932654] The buggy address belongs to the physical page: [ 16.932687] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1061bc [ 16.932741] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.932793] page_type: f5(slab) [ 16.932855] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.932911] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.932953] page dumped because: kasan: bad access detected [ 16.932984] [ 16.933001] Memory state around the buggy address: [ 16.933035] fff00000c61bc380: fa fb fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 16.933087] fff00000c61bc400: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.933406] >fff00000c61bc480: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.933458] ^ [ 16.933489] fff00000c61bc500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.934151] fff00000c61bc580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.934233] ==================================================================
[ 12.900232] ================================================================== [ 12.901437] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 12.901728] Read of size 1 at addr ffff88810226cfc0 by task kunit_try_catch/209 [ 12.901941] [ 12.902029] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.902073] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.902084] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.902105] Call Trace: [ 12.902116] <TASK> [ 12.902131] dump_stack_lvl+0x73/0xb0 [ 12.902161] print_report+0xd1/0x650 [ 12.902183] ? __virt_addr_valid+0x1db/0x2d0 [ 12.902241] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.902264] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.902286] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.902321] kasan_report+0x141/0x180 [ 12.902343] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.902394] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.902418] __kasan_check_byte+0x3d/0x50 [ 12.902466] kfree_sensitive+0x22/0x90 [ 12.902489] kmalloc_double_kzfree+0x19c/0x350 [ 12.902511] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.902535] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 12.902562] ? trace_hardirqs_on+0x37/0xe0 [ 12.902585] ? __pfx_read_tsc+0x10/0x10 [ 12.902607] ? ktime_get_ts64+0x86/0x230 [ 12.902631] kunit_try_run_case+0x1a5/0x480 [ 12.902655] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.902680] ? queued_spin_lock_slowpath+0x116/0xb40 [ 12.902732] ? __kthread_parkme+0x82/0x180 [ 12.902753] ? preempt_count_sub+0x50/0x80 [ 12.902798] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.902822] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.902846] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.902881] kthread+0x337/0x6f0 [ 12.902908] ? trace_preempt_on+0x20/0xc0 [ 12.902930] ? __pfx_kthread+0x10/0x10 [ 12.902950] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.902981] ? calculate_sigpending+0x7b/0xa0 [ 12.903005] ? __pfx_kthread+0x10/0x10 [ 12.903075] ret_from_fork+0x116/0x1d0 [ 12.903097] ? __pfx_kthread+0x10/0x10 [ 12.903117] ret_from_fork_asm+0x1a/0x30 [ 12.903148] </TASK> [ 12.903158] [ 12.911691] Allocated by task 209: [ 12.911896] kasan_save_stack+0x45/0x70 [ 12.912195] kasan_save_track+0x18/0x40 [ 12.912421] kasan_save_alloc_info+0x3b/0x50 [ 12.912654] __kasan_kmalloc+0xb7/0xc0 [ 12.912886] __kmalloc_cache_noprof+0x189/0x420 [ 12.913218] kmalloc_double_kzfree+0xa9/0x350 [ 12.913456] kunit_try_run_case+0x1a5/0x480 [ 12.913661] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.913954] kthread+0x337/0x6f0 [ 12.914219] ret_from_fork+0x116/0x1d0 [ 12.914422] ret_from_fork_asm+0x1a/0x30 [ 12.914770] [ 12.914863] Freed by task 209: [ 12.914980] kasan_save_stack+0x45/0x70 [ 12.915476] kasan_save_track+0x18/0x40 [ 12.915617] kasan_save_free_info+0x3f/0x60 [ 12.915884] __kasan_slab_free+0x56/0x70 [ 12.916266] kfree+0x222/0x3f0 [ 12.916491] kfree_sensitive+0x67/0x90 [ 12.916681] kmalloc_double_kzfree+0x12b/0x350 [ 12.916926] kunit_try_run_case+0x1a5/0x480 [ 12.917094] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.917481] kthread+0x337/0x6f0 [ 12.917722] ret_from_fork+0x116/0x1d0 [ 12.917945] ret_from_fork_asm+0x1a/0x30 [ 12.918292] [ 12.918381] The buggy address belongs to the object at ffff88810226cfc0 [ 12.918381] which belongs to the cache kmalloc-16 of size 16 [ 12.918850] The buggy address is located 0 bytes inside of [ 12.918850] freed 16-byte region [ffff88810226cfc0, ffff88810226cfd0) [ 12.919520] [ 12.919633] The buggy address belongs to the physical page: [ 12.919917] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10226c [ 12.920545] flags: 0x200000000000000(node=0|zone=2) [ 12.920838] page_type: f5(slab) [ 12.921050] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.921468] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.921821] page dumped because: kasan: bad access detected [ 12.922094] [ 12.922236] Memory state around the buggy address: [ 12.922456] ffff88810226ce80: fa fb fc fc 00 04 fc fc 00 00 fc fc 00 04 fc fc [ 12.922813] ffff88810226cf00: 00 04 fc fc 00 00 fc fc fa fb fc fc fa fb fc fc [ 12.923106] >ffff88810226cf80: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 12.923508] ^ [ 12.923668] ffff88810226d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.924309] ffff88810226d080: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 12.924521] ==================================================================