Date
July 20, 2025, 8:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.318610] ================================================================== [ 15.318670] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 15.318722] Write of size 33 at addr fff00000c770c500 by task kunit_try_catch/187 [ 15.318773] [ 15.318809] CPU: 1 UID: 0 PID: 187 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.318915] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.318943] Hardware name: linux,dummy-virt (DT) [ 15.318976] Call trace: [ 15.318998] show_stack+0x20/0x38 (C) [ 15.319050] dump_stack_lvl+0x8c/0xd0 [ 15.319099] print_report+0x118/0x5d0 [ 15.319146] kasan_report+0xdc/0x128 [ 15.319481] kasan_check_range+0x100/0x1a8 [ 15.319579] __asan_memset+0x34/0x78 [ 15.319820] kmalloc_uaf_memset+0x170/0x310 [ 15.319891] kunit_try_run_case+0x170/0x3f0 [ 15.320601] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.320695] kthread+0x328/0x630 [ 15.320753] ret_from_fork+0x10/0x20 [ 15.320813] [ 15.321000] Allocated by task 187: [ 15.321050] kasan_save_stack+0x3c/0x68 [ 15.321469] kasan_save_track+0x20/0x40 [ 15.321702] kasan_save_alloc_info+0x40/0x58 [ 15.321908] __kasan_kmalloc+0xd4/0xd8 [ 15.322000] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.322042] kmalloc_uaf_memset+0xb8/0x310 [ 15.322084] kunit_try_run_case+0x170/0x3f0 [ 15.322122] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.322334] kthread+0x328/0x630 [ 15.322424] ret_from_fork+0x10/0x20 [ 15.322770] [ 15.323159] Freed by task 187: [ 15.323259] kasan_save_stack+0x3c/0x68 [ 15.323580] kasan_save_track+0x20/0x40 [ 15.323824] kasan_save_free_info+0x4c/0x78 [ 15.323921] __kasan_slab_free+0x6c/0x98 [ 15.324054] kfree+0x214/0x3c8 [ 15.324114] kmalloc_uaf_memset+0x11c/0x310 [ 15.324246] kunit_try_run_case+0x170/0x3f0 [ 15.324289] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.324535] kthread+0x328/0x630 [ 15.324594] ret_from_fork+0x10/0x20 [ 15.324740] [ 15.324861] The buggy address belongs to the object at fff00000c770c500 [ 15.324861] which belongs to the cache kmalloc-64 of size 64 [ 15.325156] The buggy address is located 0 bytes inside of [ 15.325156] freed 64-byte region [fff00000c770c500, fff00000c770c540) [ 15.325407] [ 15.325658] The buggy address belongs to the physical page: [ 15.325706] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10770c [ 15.325906] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.326061] page_type: f5(slab) [ 15.326150] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 15.326291] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 15.326334] page dumped because: kasan: bad access detected [ 15.326586] [ 15.326668] Memory state around the buggy address: [ 15.326715] fff00000c770c400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.326763] fff00000c770c480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.326938] >fff00000c770c500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.327007] ^ [ 15.327045] fff00000c770c580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.327098] fff00000c770c600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.327137] ==================================================================
[ 13.219168] ================================================================== [ 13.219922] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 13.220381] Write of size 33 at addr ffff888103256980 by task kunit_try_catch/204 [ 13.220729] [ 13.220918] CPU: 0 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 13.220964] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.220975] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.220995] Call Trace: [ 13.221006] <TASK> [ 13.221021] dump_stack_lvl+0x73/0xb0 [ 13.221105] print_report+0xd1/0x610 [ 13.221128] ? __virt_addr_valid+0x1db/0x2d0 [ 13.221162] ? kmalloc_uaf_memset+0x1a3/0x360 [ 13.221184] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.221206] ? kmalloc_uaf_memset+0x1a3/0x360 [ 13.221240] kasan_report+0x141/0x180 [ 13.221272] ? kmalloc_uaf_memset+0x1a3/0x360 [ 13.221298] kasan_check_range+0x10c/0x1c0 [ 13.221321] __asan_memset+0x27/0x50 [ 13.221352] kmalloc_uaf_memset+0x1a3/0x360 [ 13.221373] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 13.221395] ? __schedule+0x10c6/0x2b60 [ 13.221418] ? __pfx_read_tsc+0x10/0x10 [ 13.221439] ? ktime_get_ts64+0x86/0x230 [ 13.221463] kunit_try_run_case+0x1a5/0x480 [ 13.221497] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.221519] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.221542] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.221565] ? __kthread_parkme+0x82/0x180 [ 13.221586] ? preempt_count_sub+0x50/0x80 [ 13.221619] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.221643] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.221666] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.221701] kthread+0x337/0x6f0 [ 13.221720] ? trace_preempt_on+0x20/0xc0 [ 13.221743] ? __pfx_kthread+0x10/0x10 [ 13.221763] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.221794] ? calculate_sigpending+0x7b/0xa0 [ 13.221827] ? __pfx_kthread+0x10/0x10 [ 13.221849] ret_from_fork+0x116/0x1d0 [ 13.221868] ? __pfx_kthread+0x10/0x10 [ 13.221888] ret_from_fork_asm+0x1a/0x30 [ 13.221930] </TASK> [ 13.221940] [ 13.229775] Allocated by task 204: [ 13.229992] kasan_save_stack+0x45/0x70 [ 13.230399] kasan_save_track+0x18/0x40 [ 13.230620] kasan_save_alloc_info+0x3b/0x50 [ 13.230852] __kasan_kmalloc+0xb7/0xc0 [ 13.231100] __kmalloc_cache_noprof+0x189/0x420 [ 13.231327] kmalloc_uaf_memset+0xa9/0x360 [ 13.231560] kunit_try_run_case+0x1a5/0x480 [ 13.231756] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.232026] kthread+0x337/0x6f0 [ 13.232245] ret_from_fork+0x116/0x1d0 [ 13.232401] ret_from_fork_asm+0x1a/0x30 [ 13.232633] [ 13.232737] Freed by task 204: [ 13.232896] kasan_save_stack+0x45/0x70 [ 13.233042] kasan_save_track+0x18/0x40 [ 13.233184] kasan_save_free_info+0x3f/0x60 [ 13.233337] __kasan_slab_free+0x56/0x70 [ 13.233492] kfree+0x222/0x3f0 [ 13.233662] kmalloc_uaf_memset+0x12b/0x360 [ 13.234024] kunit_try_run_case+0x1a5/0x480 [ 13.234334] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.234592] kthread+0x337/0x6f0 [ 13.234721] ret_from_fork+0x116/0x1d0 [ 13.235110] ret_from_fork_asm+0x1a/0x30 [ 13.235350] [ 13.235451] The buggy address belongs to the object at ffff888103256980 [ 13.235451] which belongs to the cache kmalloc-64 of size 64 [ 13.236273] The buggy address is located 0 bytes inside of [ 13.236273] freed 64-byte region [ffff888103256980, ffff8881032569c0) [ 13.236750] [ 13.236865] The buggy address belongs to the physical page: [ 13.237252] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103256 [ 13.237518] flags: 0x200000000000000(node=0|zone=2) [ 13.237692] page_type: f5(slab) [ 13.237836] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 13.238406] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 13.238761] page dumped because: kasan: bad access detected [ 13.239018] [ 13.239284] Memory state around the buggy address: [ 13.239537] ffff888103256880: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 13.239933] ffff888103256900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.240289] >ffff888103256980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.240623] ^ [ 13.240820] ffff888103256a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.241193] ffff888103256a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.241521] ==================================================================