Date
July 9, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.882294] ================================================================== [ 16.882368] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 16.882423] Read of size 1 at addr fff00000c61bc468 by task kunit_try_catch/184 [ 16.882571] [ 16.882691] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.882803] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.882839] Hardware name: linux,dummy-virt (DT) [ 16.882880] Call trace: [ 16.882919] show_stack+0x20/0x38 (C) [ 16.882986] dump_stack_lvl+0x8c/0xd0 [ 16.883070] print_report+0x118/0x608 [ 16.883168] kasan_report+0xdc/0x128 [ 16.883233] __asan_report_load1_noabort+0x20/0x30 [ 16.883294] kmalloc_uaf+0x300/0x338 [ 16.883360] kunit_try_run_case+0x170/0x3f0 [ 16.883408] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.883460] kthread+0x328/0x630 [ 16.883501] ret_from_fork+0x10/0x20 [ 16.883550] [ 16.883568] Allocated by task 184: [ 16.883597] kasan_save_stack+0x3c/0x68 [ 16.883636] kasan_save_track+0x20/0x40 [ 16.883682] kasan_save_alloc_info+0x40/0x58 [ 16.883773] __kasan_kmalloc+0xd4/0xd8 [ 16.883820] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.883885] kmalloc_uaf+0xb8/0x338 [ 16.883951] kunit_try_run_case+0x170/0x3f0 [ 16.884029] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.884124] kthread+0x328/0x630 [ 16.884206] ret_from_fork+0x10/0x20 [ 16.884292] [ 16.884335] Freed by task 184: [ 16.884373] kasan_save_stack+0x3c/0x68 [ 16.884409] kasan_save_track+0x20/0x40 [ 16.884446] kasan_save_free_info+0x4c/0x78 [ 16.884747] __kasan_slab_free+0x6c/0x98 [ 16.884893] kfree+0x214/0x3c8 [ 16.884973] kmalloc_uaf+0x11c/0x338 [ 16.885050] kunit_try_run_case+0x170/0x3f0 [ 16.885142] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.885224] kthread+0x328/0x630 [ 16.885295] ret_from_fork+0x10/0x20 [ 16.885342] [ 16.885361] The buggy address belongs to the object at fff00000c61bc460 [ 16.885361] which belongs to the cache kmalloc-16 of size 16 [ 16.885692] The buggy address is located 8 bytes inside of [ 16.885692] freed 16-byte region [fff00000c61bc460, fff00000c61bc470) [ 16.885822] [ 16.885870] The buggy address belongs to the physical page: [ 16.885913] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1061bc [ 16.885975] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.886041] page_type: f5(slab) [ 16.886096] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.886224] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.886266] page dumped because: kasan: bad access detected [ 16.886297] [ 16.886342] Memory state around the buggy address: [ 16.886615] fff00000c61bc300: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.886748] fff00000c61bc380: fa fb fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 16.886825] >fff00000c61bc400: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.886878] ^ [ 16.886952] fff00000c61bc480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.887005] fff00000c61bc500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.887070] ==================================================================
[ 12.808353] ================================================================== [ 12.808802] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 12.809085] Read of size 1 at addr ffff8881031eb028 by task kunit_try_catch/201 [ 12.809972] [ 12.810305] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.810355] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.810367] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.810389] Call Trace: [ 12.810402] <TASK> [ 12.810420] dump_stack_lvl+0x73/0xb0 [ 12.810453] print_report+0xd1/0x650 [ 12.810475] ? __virt_addr_valid+0x1db/0x2d0 [ 12.810499] ? kmalloc_uaf+0x320/0x380 [ 12.810518] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.810541] ? kmalloc_uaf+0x320/0x380 [ 12.810560] kasan_report+0x141/0x180 [ 12.810581] ? kmalloc_uaf+0x320/0x380 [ 12.810604] __asan_report_load1_noabort+0x18/0x20 [ 12.810629] kmalloc_uaf+0x320/0x380 [ 12.810648] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.810668] ? __schedule+0x10cc/0x2b60 [ 12.810690] ? __pfx_read_tsc+0x10/0x10 [ 12.810726] ? ktime_get_ts64+0x86/0x230 [ 12.810774] kunit_try_run_case+0x1a5/0x480 [ 12.810798] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.810821] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.810846] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.810869] ? __kthread_parkme+0x82/0x180 [ 12.810890] ? preempt_count_sub+0x50/0x80 [ 12.810913] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.810937] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.810961] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.810986] kthread+0x337/0x6f0 [ 12.811004] ? trace_preempt_on+0x20/0xc0 [ 12.811111] ? __pfx_kthread+0x10/0x10 [ 12.811131] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.811153] ? calculate_sigpending+0x7b/0xa0 [ 12.811177] ? __pfx_kthread+0x10/0x10 [ 12.811198] ret_from_fork+0x116/0x1d0 [ 12.811216] ? __pfx_kthread+0x10/0x10 [ 12.811236] ret_from_fork_asm+0x1a/0x30 [ 12.811268] </TASK> [ 12.811278] [ 12.819479] Allocated by task 201: [ 12.819654] kasan_save_stack+0x45/0x70 [ 12.819954] kasan_save_track+0x18/0x40 [ 12.820168] kasan_save_alloc_info+0x3b/0x50 [ 12.820388] __kasan_kmalloc+0xb7/0xc0 [ 12.820600] __kmalloc_cache_noprof+0x189/0x420 [ 12.820850] kmalloc_uaf+0xaa/0x380 [ 12.821164] kunit_try_run_case+0x1a5/0x480 [ 12.821399] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.821608] kthread+0x337/0x6f0 [ 12.821737] ret_from_fork+0x116/0x1d0 [ 12.821869] ret_from_fork_asm+0x1a/0x30 [ 12.822165] [ 12.822262] Freed by task 201: [ 12.822419] kasan_save_stack+0x45/0x70 [ 12.822609] kasan_save_track+0x18/0x40 [ 12.822809] kasan_save_free_info+0x3f/0x60 [ 12.822987] __kasan_slab_free+0x56/0x70 [ 12.823238] kfree+0x222/0x3f0 [ 12.823357] kmalloc_uaf+0x12c/0x380 [ 12.823484] kunit_try_run_case+0x1a5/0x480 [ 12.823720] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.823970] kthread+0x337/0x6f0 [ 12.824214] ret_from_fork+0x116/0x1d0 [ 12.824423] ret_from_fork_asm+0x1a/0x30 [ 12.824584] [ 12.824654] The buggy address belongs to the object at ffff8881031eb020 [ 12.824654] which belongs to the cache kmalloc-16 of size 16 [ 12.825279] The buggy address is located 8 bytes inside of [ 12.825279] freed 16-byte region [ffff8881031eb020, ffff8881031eb030) [ 12.825693] [ 12.825824] The buggy address belongs to the physical page: [ 12.826156] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1031eb [ 12.826474] flags: 0x200000000000000(node=0|zone=2) [ 12.826637] page_type: f5(slab) [ 12.826768] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.827204] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.827560] page dumped because: kasan: bad access detected [ 12.827823] [ 12.827892] Memory state around the buggy address: [ 12.828204] ffff8881031eaf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.828492] ffff8881031eaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.828759] >ffff8881031eb000: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 12.829164] ^ [ 12.829386] ffff8881031eb080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.829716] ffff8881031eb100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.829947] ==================================================================