Date
July 20, 2025, 11:12 a.m.
Environment | |
---|---|
qemu-x86_64 |
[ 16.328647] ================================================================== [ 16.330010] BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x32/0x90 [ 16.330819] Write of size 121 at addr ffff888102ad4e00 by task kunit_try_catch/303 [ 16.331172] [ 16.331291] CPU: 0 UID: 0 PID: 303 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 16.331343] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.331356] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.331381] Call Trace: [ 16.331394] <TASK> [ 16.331415] dump_stack_lvl+0x73/0xb0 [ 16.331447] print_report+0xd1/0x610 [ 16.331472] ? __virt_addr_valid+0x1db/0x2d0 [ 16.331497] ? _copy_from_user+0x32/0x90 [ 16.331516] ? kasan_complete_mode_report_info+0x2a/0x200 [ 16.331539] ? _copy_from_user+0x32/0x90 [ 16.331559] kasan_report+0x141/0x180 [ 16.331581] ? _copy_from_user+0x32/0x90 [ 16.331605] kasan_check_range+0x10c/0x1c0 [ 16.331629] __kasan_check_write+0x18/0x20 [ 16.331648] _copy_from_user+0x32/0x90 [ 16.331668] copy_user_test_oob+0x2be/0x10f0 [ 16.331942] ? __pfx_copy_user_test_oob+0x10/0x10 [ 16.331967] ? finish_task_switch.isra.0+0x153/0x700 [ 16.332024] ? __switch_to+0x47/0xf50 [ 16.332053] ? __schedule+0x10cc/0x2b60 [ 16.332077] ? __pfx_read_tsc+0x10/0x10 [ 16.332099] ? ktime_get_ts64+0x86/0x230 [ 16.332123] kunit_try_run_case+0x1a5/0x480 [ 16.332147] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.332169] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 16.332193] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 16.332216] ? __kthread_parkme+0x82/0x180 [ 16.332238] ? preempt_count_sub+0x50/0x80 [ 16.332261] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.332284] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.332308] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 16.332331] kthread+0x337/0x6f0 [ 16.332351] ? trace_preempt_on+0x20/0xc0 [ 16.332376] ? __pfx_kthread+0x10/0x10 [ 16.332397] ? _raw_spin_unlock_irq+0x47/0x80 [ 16.332418] ? calculate_sigpending+0x7b/0xa0 [ 16.332442] ? __pfx_kthread+0x10/0x10 [ 16.332464] ret_from_fork+0x116/0x1d0 [ 16.332484] ? __pfx_kthread+0x10/0x10 [ 16.332504] ret_from_fork_asm+0x1a/0x30 [ 16.332535] </TASK> [ 16.332548] [ 16.345993] Allocated by task 303: [ 16.346172] kasan_save_stack+0x45/0x70 [ 16.346738] kasan_save_track+0x18/0x40 [ 16.347125] kasan_save_alloc_info+0x3b/0x50 [ 16.347334] __kasan_kmalloc+0xb7/0xc0 [ 16.347845] __kmalloc_noprof+0x1c9/0x500 [ 16.348607] kunit_kmalloc_array+0x25/0x60 [ 16.348884] copy_user_test_oob+0xab/0x10f0 [ 16.349097] kunit_try_run_case+0x1a5/0x480 [ 16.349290] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.349899] kthread+0x337/0x6f0 [ 16.350084] ret_from_fork+0x116/0x1d0 [ 16.350253] ret_from_fork_asm+0x1a/0x30 [ 16.350870] [ 16.351042] The buggy address belongs to the object at ffff888102ad4e00 [ 16.351042] which belongs to the cache kmalloc-128 of size 128 [ 16.351902] The buggy address is located 0 bytes inside of [ 16.351902] allocated 120-byte region [ffff888102ad4e00, ffff888102ad4e78) [ 16.353080] [ 16.353617] The buggy address belongs to the physical page: [ 16.353953] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ad4 [ 16.354291] flags: 0x200000000000000(node=0|zone=2) [ 16.355031] page_type: f5(slab) [ 16.355293] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 16.355940] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 16.356659] page dumped because: kasan: bad access detected [ 16.356921] [ 16.357016] Memory state around the buggy address: [ 16.357225] ffff888102ad4d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.358087] ffff888102ad4d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.358536] >ffff888102ad4e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 16.359177] ^ [ 16.359838] ffff888102ad4e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.360331] ffff888102ad4f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.361166] ==================================================================