Date
July 8, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.526147] ================================================================== [ 19.526223] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 19.526282] Write of size 33 at addr fff00000c771c180 by task kunit_try_catch/186 [ 19.526333] [ 19.526502] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.526784] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.526816] Hardware name: linux,dummy-virt (DT) [ 19.526849] Call trace: [ 19.527114] show_stack+0x20/0x38 (C) [ 19.527294] dump_stack_lvl+0x8c/0xd0 [ 19.527347] print_report+0x118/0x608 [ 19.527394] kasan_report+0xdc/0x128 [ 19.527441] kasan_check_range+0x100/0x1a8 [ 19.527541] __asan_memset+0x34/0x78 [ 19.527596] kmalloc_uaf_memset+0x170/0x310 [ 19.527677] kunit_try_run_case+0x170/0x3f0 [ 19.527727] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.527923] kthread+0x328/0x630 [ 19.527975] ret_from_fork+0x10/0x20 [ 19.528076] [ 19.528150] Allocated by task 186: [ 19.528192] kasan_save_stack+0x3c/0x68 [ 19.528245] kasan_save_track+0x20/0x40 [ 19.528465] kasan_save_alloc_info+0x40/0x58 [ 19.528506] __kasan_kmalloc+0xd4/0xd8 [ 19.528583] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.528660] kmalloc_uaf_memset+0xb8/0x310 [ 19.528697] kunit_try_run_case+0x170/0x3f0 [ 19.528775] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.528954] kthread+0x328/0x630 [ 19.528991] ret_from_fork+0x10/0x20 [ 19.529076] [ 19.529095] Freed by task 186: [ 19.529291] kasan_save_stack+0x3c/0x68 [ 19.529414] kasan_save_track+0x20/0x40 [ 19.529528] kasan_save_free_info+0x4c/0x78 [ 19.529586] __kasan_slab_free+0x6c/0x98 [ 19.529645] kfree+0x214/0x3c8 [ 19.529727] kmalloc_uaf_memset+0x11c/0x310 [ 19.529786] kunit_try_run_case+0x170/0x3f0 [ 19.529929] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.529993] kthread+0x328/0x630 [ 19.530167] ret_from_fork+0x10/0x20 [ 19.530203] [ 19.530222] The buggy address belongs to the object at fff00000c771c180 [ 19.530222] which belongs to the cache kmalloc-64 of size 64 [ 19.530329] The buggy address is located 0 bytes inside of [ 19.530329] freed 64-byte region [fff00000c771c180, fff00000c771c1c0) [ 19.530877] [ 19.530977] The buggy address belongs to the physical page: [ 19.531066] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10771c [ 19.531179] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.531331] page_type: f5(slab) [ 19.531423] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.531565] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 19.531609] page dumped because: kasan: bad access detected [ 19.531673] [ 19.531691] Memory state around the buggy address: [ 19.531961] fff00000c771c080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.532129] fff00000c771c100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.532446] >fff00000c771c180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.532490] ^ [ 19.532518] fff00000c771c200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.532583] fff00000c771c280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.532623] ==================================================================
[ 12.778153] ================================================================== [ 12.779314] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 12.780013] Write of size 33 at addr ffff888102b88400 by task kunit_try_catch/204 [ 12.780762] [ 12.780927] CPU: 0 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.780989] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.781000] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.781022] Call Trace: [ 12.781036] <TASK> [ 12.781081] dump_stack_lvl+0x73/0xb0 [ 12.781114] print_report+0xd1/0x650 [ 12.781148] ? __virt_addr_valid+0x1db/0x2d0 [ 12.781172] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.781192] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.781216] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.781237] kasan_report+0x141/0x180 [ 12.781258] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.781284] kasan_check_range+0x10c/0x1c0 [ 12.781307] __asan_memset+0x27/0x50 [ 12.781326] kmalloc_uaf_memset+0x1a3/0x360 [ 12.781347] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 12.781371] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 12.781397] kunit_try_run_case+0x1a5/0x480 [ 12.781421] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.781443] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.781467] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.781492] ? __kthread_parkme+0x82/0x180 [ 12.781519] ? preempt_count_sub+0x50/0x80 [ 12.781545] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.781569] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.781592] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.781626] kthread+0x337/0x6f0 [ 12.781644] ? trace_preempt_on+0x20/0xc0 [ 12.781668] ? __pfx_kthread+0x10/0x10 [ 12.781688] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.781713] ? calculate_sigpending+0x7b/0xa0 [ 12.781737] ? __pfx_kthread+0x10/0x10 [ 12.781758] ret_from_fork+0x116/0x1d0 [ 12.781778] ? __pfx_kthread+0x10/0x10 [ 12.781798] ret_from_fork_asm+0x1a/0x30 [ 12.781830] </TASK> [ 12.781841] [ 12.795000] Allocated by task 204: [ 12.795267] kasan_save_stack+0x45/0x70 [ 12.795427] kasan_save_track+0x18/0x40 [ 12.795667] kasan_save_alloc_info+0x3b/0x50 [ 12.796079] __kasan_kmalloc+0xb7/0xc0 [ 12.796491] __kmalloc_cache_noprof+0x189/0x420 [ 12.797045] kmalloc_uaf_memset+0xa9/0x360 [ 12.797503] kunit_try_run_case+0x1a5/0x480 [ 12.798068] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.798575] kthread+0x337/0x6f0 [ 12.798739] ret_from_fork+0x116/0x1d0 [ 12.798940] ret_from_fork_asm+0x1a/0x30 [ 12.799331] [ 12.799518] Freed by task 204: [ 12.799829] kasan_save_stack+0x45/0x70 [ 12.800265] kasan_save_track+0x18/0x40 [ 12.800677] kasan_save_free_info+0x3f/0x60 [ 12.800955] __kasan_slab_free+0x56/0x70 [ 12.801325] kfree+0x222/0x3f0 [ 12.801442] kmalloc_uaf_memset+0x12b/0x360 [ 12.801855] kunit_try_run_case+0x1a5/0x480 [ 12.802300] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.802901] kthread+0x337/0x6f0 [ 12.803268] ret_from_fork+0x116/0x1d0 [ 12.803415] ret_from_fork_asm+0x1a/0x30 [ 12.803819] [ 12.804007] The buggy address belongs to the object at ffff888102b88400 [ 12.804007] which belongs to the cache kmalloc-64 of size 64 [ 12.804993] The buggy address is located 0 bytes inside of [ 12.804993] freed 64-byte region [ffff888102b88400, ffff888102b88440) [ 12.806019] [ 12.806186] The buggy address belongs to the physical page: [ 12.806724] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b88 [ 12.807333] flags: 0x200000000000000(node=0|zone=2) [ 12.807890] page_type: f5(slab) [ 12.808102] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.808817] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.809455] page dumped because: kasan: bad access detected [ 12.810082] [ 12.810206] Memory state around the buggy address: [ 12.810584] ffff888102b88300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.811027] ffff888102b88380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.811243] >ffff888102b88400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.811454] ^ [ 12.811657] ffff888102b88480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.812310] ffff888102b88500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.813089] ==================================================================