Date
July 17, 2025, 11:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.488437] ================================================================== [ 15.488681] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 15.488749] Write of size 33 at addr fff00000c7891c00 by task kunit_try_catch/187 [ 15.488802] [ 15.489022] CPU: 0 UID: 0 PID: 187 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.489215] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.489295] Hardware name: linux,dummy-virt (DT) [ 15.489337] Call trace: [ 15.489372] show_stack+0x20/0x38 (C) [ 15.489550] dump_stack_lvl+0x8c/0xd0 [ 15.489607] print_report+0x118/0x5d0 [ 15.489786] kasan_report+0xdc/0x128 [ 15.489969] kasan_check_range+0x100/0x1a8 [ 15.490156] __asan_memset+0x34/0x78 [ 15.490226] kmalloc_uaf_memset+0x170/0x310 [ 15.490403] kunit_try_run_case+0x170/0x3f0 [ 15.490508] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.490574] kthread+0x328/0x630 [ 15.490785] ret_from_fork+0x10/0x20 [ 15.490844] [ 15.490964] Allocated by task 187: [ 15.491280] kasan_save_stack+0x3c/0x68 [ 15.491368] kasan_save_track+0x20/0x40 [ 15.491501] kasan_save_alloc_info+0x40/0x58 [ 15.491568] __kasan_kmalloc+0xd4/0xd8 [ 15.491650] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.491815] kmalloc_uaf_memset+0xb8/0x310 [ 15.491942] kunit_try_run_case+0x170/0x3f0 [ 15.492061] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.492203] kthread+0x328/0x630 [ 15.492413] ret_from_fork+0x10/0x20 [ 15.492494] [ 15.492693] Freed by task 187: [ 15.492771] kasan_save_stack+0x3c/0x68 [ 15.492918] kasan_save_track+0x20/0x40 [ 15.493046] kasan_save_free_info+0x4c/0x78 [ 15.493204] __kasan_slab_free+0x6c/0x98 [ 15.493279] kfree+0x214/0x3c8 [ 15.493312] kmalloc_uaf_memset+0x11c/0x310 [ 15.493699] kunit_try_run_case+0x170/0x3f0 [ 15.493801] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.494147] kthread+0x328/0x630 [ 15.494219] ret_from_fork+0x10/0x20 [ 15.494349] [ 15.494392] The buggy address belongs to the object at fff00000c7891c00 [ 15.494392] which belongs to the cache kmalloc-64 of size 64 [ 15.494491] The buggy address is located 0 bytes inside of [ 15.494491] freed 64-byte region [fff00000c7891c00, fff00000c7891c40) [ 15.494689] [ 15.494758] The buggy address belongs to the physical page: [ 15.494792] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107891 [ 15.494938] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.495124] page_type: f5(slab) [ 15.495273] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 15.495402] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 15.495579] page dumped because: kasan: bad access detected [ 15.495613] [ 15.495631] Memory state around the buggy address: [ 15.495714] fff00000c7891b00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.496017] fff00000c7891b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.496198] >fff00000c7891c00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.496356] ^ [ 15.496400] fff00000c7891c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.496460] fff00000c7891d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.496500] ==================================================================
[ 13.318633] ================================================================== [ 13.319079] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 13.319857] Write of size 33 at addr ffff888102a13100 by task kunit_try_catch/203 [ 13.320191] [ 13.320330] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 13.320374] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.320386] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.320407] Call Trace: [ 13.320420] <TASK> [ 13.320436] dump_stack_lvl+0x73/0xb0 [ 13.320467] print_report+0xd1/0x610 [ 13.320500] ? __virt_addr_valid+0x1db/0x2d0 [ 13.320524] ? kmalloc_uaf_memset+0x1a3/0x360 [ 13.320612] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.320642] ? kmalloc_uaf_memset+0x1a3/0x360 [ 13.320664] kasan_report+0x141/0x180 [ 13.320700] ? kmalloc_uaf_memset+0x1a3/0x360 [ 13.320727] kasan_check_range+0x10c/0x1c0 [ 13.320751] __asan_memset+0x27/0x50 [ 13.320781] kmalloc_uaf_memset+0x1a3/0x360 [ 13.320803] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 13.320826] ? __schedule+0x10cc/0x2b60 [ 13.320858] ? __pfx_read_tsc+0x10/0x10 [ 13.320880] ? ktime_get_ts64+0x86/0x230 [ 13.320904] kunit_try_run_case+0x1a5/0x480 [ 13.320941] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.320965] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.320989] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.321013] ? __kthread_parkme+0x82/0x180 [ 13.321034] ? preempt_count_sub+0x50/0x80 [ 13.321058] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.321082] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.321107] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.321132] kthread+0x337/0x6f0 [ 13.321151] ? trace_preempt_on+0x20/0xc0 [ 13.321174] ? __pfx_kthread+0x10/0x10 [ 13.321195] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.321216] ? calculate_sigpending+0x7b/0xa0 [ 13.321285] ? __pfx_kthread+0x10/0x10 [ 13.321309] ret_from_fork+0x116/0x1d0 [ 13.321329] ? __pfx_kthread+0x10/0x10 [ 13.321349] ret_from_fork_asm+0x1a/0x30 [ 13.321381] </TASK> [ 13.321391] [ 13.329480] Allocated by task 203: [ 13.329678] kasan_save_stack+0x45/0x70 [ 13.329895] kasan_save_track+0x18/0x40 [ 13.330080] kasan_save_alloc_info+0x3b/0x50 [ 13.330471] __kasan_kmalloc+0xb7/0xc0 [ 13.330670] __kmalloc_cache_noprof+0x189/0x420 [ 13.330902] kmalloc_uaf_memset+0xa9/0x360 [ 13.331107] kunit_try_run_case+0x1a5/0x480 [ 13.331438] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.331670] kthread+0x337/0x6f0 [ 13.331794] ret_from_fork+0x116/0x1d0 [ 13.331953] ret_from_fork_asm+0x1a/0x30 [ 13.332177] [ 13.332271] Freed by task 203: [ 13.332427] kasan_save_stack+0x45/0x70 [ 13.332825] kasan_save_track+0x18/0x40 [ 13.333020] kasan_save_free_info+0x3f/0x60 [ 13.333255] __kasan_slab_free+0x56/0x70 [ 13.333501] kfree+0x222/0x3f0 [ 13.333665] kmalloc_uaf_memset+0x12b/0x360 [ 13.333816] kunit_try_run_case+0x1a5/0x480 [ 13.334023] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.334387] kthread+0x337/0x6f0 [ 13.334651] ret_from_fork+0x116/0x1d0 [ 13.334973] ret_from_fork_asm+0x1a/0x30 [ 13.335146] [ 13.335241] The buggy address belongs to the object at ffff888102a13100 [ 13.335241] which belongs to the cache kmalloc-64 of size 64 [ 13.335721] The buggy address is located 0 bytes inside of [ 13.335721] freed 64-byte region [ffff888102a13100, ffff888102a13140) [ 13.336171] [ 13.336261] The buggy address belongs to the physical page: [ 13.336489] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a13 [ 13.338005] flags: 0x200000000000000(node=0|zone=2) [ 13.338612] page_type: f5(slab) [ 13.339079] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 13.339663] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 13.340341] page dumped because: kasan: bad access detected [ 13.340787] [ 13.341040] Memory state around the buggy address: [ 13.341749] ffff888102a13000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.342160] ffff888102a13080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.343028] >ffff888102a13100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.343745] ^ [ 13.344215] ffff888102a13180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.344782] ffff888102a13200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.345084] ==================================================================