Date
July 23, 2025, 2:10 a.m.
Environment | |
---|---|
qemu-x86_64 |
[ 16.402714] ================================================================== [ 16.403036] BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x3c/0x70 [ 16.403310] Read of size 121 at addr ffff888102b16500 by task kunit_try_catch/302 [ 16.403640] [ 16.403739] CPU: 0 UID: 0 PID: 302 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 16.403785] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.403799] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.403834] Call Trace: [ 16.403852] <TASK> [ 16.403869] dump_stack_lvl+0x73/0xb0 [ 16.403897] print_report+0xd1/0x610 [ 16.403921] ? __virt_addr_valid+0x1db/0x2d0 [ 16.403944] ? _copy_to_user+0x3c/0x70 [ 16.403964] ? kasan_complete_mode_report_info+0x2a/0x200 [ 16.403987] ? _copy_to_user+0x3c/0x70 [ 16.404008] kasan_report+0x141/0x180 [ 16.404031] ? _copy_to_user+0x3c/0x70 [ 16.404055] kasan_check_range+0x10c/0x1c0 [ 16.404079] __kasan_check_read+0x15/0x20 [ 16.404112] _copy_to_user+0x3c/0x70 [ 16.404133] copy_user_test_oob+0x364/0x10f0 [ 16.404161] ? __pfx_copy_user_test_oob+0x10/0x10 [ 16.404184] ? finish_task_switch.isra.0+0x153/0x700 [ 16.404207] ? __switch_to+0x47/0xf50 [ 16.404232] ? __schedule+0x10c6/0x2b60 [ 16.404256] ? __pfx_read_tsc+0x10/0x10 [ 16.404277] ? ktime_get_ts64+0x86/0x230 [ 16.404302] kunit_try_run_case+0x1a5/0x480 [ 16.404326] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.404350] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 16.404375] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 16.404399] ? __kthread_parkme+0x82/0x180 [ 16.404421] ? preempt_count_sub+0x50/0x80 [ 16.404445] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.404471] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.404496] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 16.404522] kthread+0x337/0x6f0 [ 16.404544] ? trace_preempt_on+0x20/0xc0 [ 16.404570] ? __pfx_kthread+0x10/0x10 [ 16.404593] ? _raw_spin_unlock_irq+0x47/0x80 [ 16.404618] ? calculate_sigpending+0x7b/0xa0 [ 16.404645] ? __pfx_kthread+0x10/0x10 [ 16.404669] ret_from_fork+0x116/0x1d0 [ 16.404688] ? __pfx_kthread+0x10/0x10 [ 16.404711] ret_from_fork_asm+0x1a/0x30 [ 16.404743] </TASK> [ 16.404754] [ 16.412120] Allocated by task 302: [ 16.412278] kasan_save_stack+0x45/0x70 [ 16.412425] kasan_save_track+0x18/0x40 [ 16.412564] kasan_save_alloc_info+0x3b/0x50 [ 16.412715] __kasan_kmalloc+0xb7/0xc0 [ 16.412914] __kmalloc_noprof+0x1c9/0x500 [ 16.413111] kunit_kmalloc_array+0x25/0x60 [ 16.413363] copy_user_test_oob+0xab/0x10f0 [ 16.413557] kunit_try_run_case+0x1a5/0x480 [ 16.413706] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.413895] kthread+0x337/0x6f0 [ 16.414028] ret_from_fork+0x116/0x1d0 [ 16.414383] ret_from_fork_asm+0x1a/0x30 [ 16.414584] [ 16.414682] The buggy address belongs to the object at ffff888102b16500 [ 16.414682] which belongs to the cache kmalloc-128 of size 128 [ 16.415234] The buggy address is located 0 bytes inside of [ 16.415234] allocated 120-byte region [ffff888102b16500, ffff888102b16578) [ 16.415595] [ 16.415670] The buggy address belongs to the physical page: [ 16.415861] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b16 [ 16.416209] flags: 0x200000000000000(node=0|zone=2) [ 16.416660] page_type: f5(slab) [ 16.416839] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 16.417186] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 16.417417] page dumped because: kasan: bad access detected [ 16.417593] [ 16.417664] Memory state around the buggy address: [ 16.418102] ffff888102b16400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.418428] ffff888102b16480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.418746] >ffff888102b16500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 16.419073] ^ [ 16.419362] ffff888102b16580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.419636] ffff888102b16600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.419929] ==================================================================