Date
July 22, 2025, 2:40 p.m.
Environment | |
---|---|
qemu-x86_64 |
[ 15.027440] ================================================================== [ 15.029412] BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x32/0x90 [ 15.030161] Write of size 121 at addr ffff888103cfcc00 by task kunit_try_catch/305 [ 15.030647] [ 15.030751] CPU: 0 UID: 0 PID: 305 Comm: kunit_try_catch Tainted: G B N 6.15.8-rc1 #1 PREEMPT(voluntary) [ 15.030801] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.030814] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 15.030839] Call Trace: [ 15.030853] <TASK> [ 15.030873] dump_stack_lvl+0x73/0xb0 [ 15.030904] print_report+0xd1/0x610 [ 15.030929] ? __virt_addr_valid+0x1db/0x2d0 [ 15.030953] ? _copy_from_user+0x32/0x90 [ 15.030973] ? kasan_complete_mode_report_info+0x2a/0x200 [ 15.030997] ? _copy_from_user+0x32/0x90 [ 15.031018] kasan_report+0x141/0x180 [ 15.031042] ? _copy_from_user+0x32/0x90 [ 15.031067] kasan_check_range+0x10c/0x1c0 [ 15.031088] __kasan_check_write+0x18/0x20 [ 15.031109] _copy_from_user+0x32/0x90 [ 15.031130] copy_user_test_oob+0x2be/0x10f0 [ 15.031154] ? __pfx_copy_user_test_oob+0x10/0x10 [ 15.031174] ? finish_task_switch.isra.0+0x153/0x700 [ 15.031200] ? __switch_to+0x5d9/0xf60 [ 15.031242] ? dequeue_task_fair+0x166/0x4e0 [ 15.031271] ? __schedule+0x10c6/0x2b60 [ 15.031296] ? __pfx_read_tsc+0x10/0x10 [ 15.031318] ? ktime_get_ts64+0x86/0x230 [ 15.031365] kunit_try_run_case+0x1a5/0x480 [ 15.031387] ? __pfx_kunit_try_run_case+0x10/0x10 [ 15.031406] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 15.031428] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 15.031453] ? __kthread_parkme+0x82/0x180 [ 15.031486] ? preempt_count_sub+0x50/0x80 [ 15.031512] ? __pfx_kunit_try_run_case+0x10/0x10 [ 15.031533] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.031569] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 15.031593] kthread+0x337/0x6f0 [ 15.031611] ? trace_preempt_on+0x20/0xc0 [ 15.031636] ? __pfx_kthread+0x10/0x10 [ 15.031655] ? _raw_spin_unlock_irq+0x47/0x80 [ 15.031678] ? calculate_sigpending+0x7b/0xa0 [ 15.031701] ? __pfx_kthread+0x10/0x10 [ 15.031720] ret_from_fork+0x41/0x80 [ 15.031742] ? __pfx_kthread+0x10/0x10 [ 15.031760] ret_from_fork_asm+0x1a/0x30 [ 15.031793] </TASK> [ 15.031806] [ 15.045131] Allocated by task 305: [ 15.045492] kasan_save_stack+0x45/0x70 [ 15.045869] kasan_save_track+0x18/0x40 [ 15.046231] kasan_save_alloc_info+0x3b/0x50 [ 15.046641] __kasan_kmalloc+0xb7/0xc0 [ 15.046989] __kmalloc_noprof+0x1c9/0x500 [ 15.047400] kunit_kmalloc_array+0x25/0x60 [ 15.047782] copy_user_test_oob+0xab/0x10f0 [ 15.048108] kunit_try_run_case+0x1a5/0x480 [ 15.048369] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.048854] kthread+0x337/0x6f0 [ 15.048995] ret_from_fork+0x41/0x80 [ 15.049149] ret_from_fork_asm+0x1a/0x30 [ 15.049552] [ 15.049708] The buggy address belongs to the object at ffff888103cfcc00 [ 15.049708] which belongs to the cache kmalloc-128 of size 128 [ 15.050687] The buggy address is located 0 bytes inside of [ 15.050687] allocated 120-byte region [ffff888103cfcc00, ffff888103cfcc78) [ 15.051048] [ 15.051122] The buggy address belongs to the physical page: [ 15.051311] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103cfc [ 15.052019] flags: 0x200000000000000(node=0|zone=2) [ 15.052493] page_type: f5(slab) [ 15.052808] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 15.053501] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 15.054144] page dumped because: kasan: bad access detected [ 15.054648] [ 15.054802] Memory state around the buggy address: [ 15.055250] ffff888103cfcb00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.055881] ffff888103cfcb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.056158] >ffff888103cfcc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 15.056794] ^ [ 15.057213] ffff888103cfcc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.057664] ffff888103cfcd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.058289] ==================================================================