Date
July 23, 2025, 2:10 a.m.
Environment | |
---|---|
qemu-x86_64 |
[ 16.379025] ================================================================== [ 16.379725] BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x32/0x90 [ 16.380038] Write of size 121 at addr ffff888102b16500 by task kunit_try_catch/302 [ 16.380787] [ 16.381043] CPU: 0 UID: 0 PID: 302 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 16.381209] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.381226] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.381251] Call Trace: [ 16.381265] <TASK> [ 16.381286] dump_stack_lvl+0x73/0xb0 [ 16.381327] print_report+0xd1/0x610 [ 16.381351] ? __virt_addr_valid+0x1db/0x2d0 [ 16.381376] ? _copy_from_user+0x32/0x90 [ 16.381396] ? kasan_complete_mode_report_info+0x2a/0x200 [ 16.381419] ? _copy_from_user+0x32/0x90 [ 16.381440] kasan_report+0x141/0x180 [ 16.381464] ? _copy_from_user+0x32/0x90 [ 16.381489] kasan_check_range+0x10c/0x1c0 [ 16.381515] __kasan_check_write+0x18/0x20 [ 16.381535] _copy_from_user+0x32/0x90 [ 16.381557] copy_user_test_oob+0x2be/0x10f0 [ 16.381584] ? __pfx_copy_user_test_oob+0x10/0x10 [ 16.381607] ? finish_task_switch.isra.0+0x153/0x700 [ 16.381631] ? __switch_to+0x47/0xf50 [ 16.381659] ? __schedule+0x10c6/0x2b60 [ 16.381683] ? __pfx_read_tsc+0x10/0x10 [ 16.381704] ? ktime_get_ts64+0x86/0x230 [ 16.381730] kunit_try_run_case+0x1a5/0x480 [ 16.381755] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.381779] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 16.381803] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 16.381837] ? __kthread_parkme+0x82/0x180 [ 16.381860] ? preempt_count_sub+0x50/0x80 [ 16.381884] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.381909] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.381934] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 16.381959] kthread+0x337/0x6f0 [ 16.381980] ? trace_preempt_on+0x20/0xc0 [ 16.382004] ? __pfx_kthread+0x10/0x10 [ 16.382025] ? _raw_spin_unlock_irq+0x47/0x80 [ 16.382048] ? calculate_sigpending+0x7b/0xa0 [ 16.382074] ? __pfx_kthread+0x10/0x10 [ 16.382104] ret_from_fork+0x116/0x1d0 [ 16.382126] ? __pfx_kthread+0x10/0x10 [ 16.382148] ret_from_fork_asm+0x1a/0x30 [ 16.382179] </TASK> [ 16.382193] [ 16.391654] Allocated by task 302: [ 16.391828] kasan_save_stack+0x45/0x70 [ 16.392000] kasan_save_track+0x18/0x40 [ 16.392157] kasan_save_alloc_info+0x3b/0x50 [ 16.392424] __kasan_kmalloc+0xb7/0xc0 [ 16.392592] __kmalloc_noprof+0x1c9/0x500 [ 16.392778] kunit_kmalloc_array+0x25/0x60 [ 16.392964] copy_user_test_oob+0xab/0x10f0 [ 16.393234] kunit_try_run_case+0x1a5/0x480 [ 16.393454] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.393671] kthread+0x337/0x6f0 [ 16.393841] ret_from_fork+0x116/0x1d0 [ 16.394003] ret_from_fork_asm+0x1a/0x30 [ 16.394231] [ 16.394307] The buggy address belongs to the object at ffff888102b16500 [ 16.394307] which belongs to the cache kmalloc-128 of size 128 [ 16.394666] The buggy address is located 0 bytes inside of [ 16.394666] allocated 120-byte region [ffff888102b16500, ffff888102b16578) [ 16.395349] [ 16.395450] The buggy address belongs to the physical page: [ 16.395652] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b16 [ 16.395950] flags: 0x200000000000000(node=0|zone=2) [ 16.396321] page_type: f5(slab) [ 16.396488] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 16.396751] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 16.397132] page dumped because: kasan: bad access detected [ 16.397353] [ 16.397453] Memory state around the buggy address: [ 16.397664] ffff888102b16400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.397926] ffff888102b16480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.398336] >ffff888102b16500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 16.398620] ^ [ 16.398916] ffff888102b16580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.399245] ffff888102b16600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.399547] ==================================================================