Date
March 19, 2025, 10:35 a.m.
| Environment | |
|---|---|
| qemu-x86_64 |
[ 28.851725] ================================================================== [ 28.852834] BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x32/0x90 [ 28.853561] Write of size 121 at addr ffff88810305ae00 by task kunit_try_catch/306 [ 28.854474] [ 28.854872] CPU: 0 UID: 0 PID: 306 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT(voluntary) [ 28.855056] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.855132] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 28.855202] Call Trace: [ 28.855243] <TASK> [ 28.855285] dump_stack_lvl+0x73/0xb0 [ 28.855464] print_report+0xd1/0x660 [ 28.855598] ? __virt_addr_valid+0x1db/0x2d0 [ 28.855808] ? kasan_complete_mode_report_info+0x2a/0x200 [ 28.855922] kasan_report+0x104/0x140 [ 28.856005] ? _copy_from_user+0x32/0x90 [ 28.856062] ? _copy_from_user+0x32/0x90 [ 28.856103] kasan_check_range+0x10c/0x1c0 [ 28.856167] __kasan_check_write+0x18/0x20 [ 28.856200] _copy_from_user+0x32/0x90 [ 28.856232] copy_user_test_oob+0x2be/0x1130 [ 28.856275] ? __pfx_copy_user_test_oob+0x10/0x10 [ 28.856312] ? finish_task_switch.isra.0+0x153/0x730 [ 28.856347] ? __switch_to+0x5d9/0xf70 [ 28.856390] ? __schedule+0xd46/0x29c0 [ 28.856424] ? __pfx_read_tsc+0x10/0x10 [ 28.856455] ? ktime_get_ts64+0x86/0x240 [ 28.856496] kunit_try_run_case+0x1b2/0x490 [ 28.856532] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.856566] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 28.856601] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 28.856635] ? __kthread_parkme+0x82/0x160 [ 28.856668] ? preempt_count_sub+0x50/0x80 [ 28.856711] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.856781] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.856818] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 28.856853] kthread+0x323/0x710 [ 28.856885] ? trace_preempt_on+0x20/0xc0 [ 28.856923] ? __pfx_kthread+0x10/0x10 [ 28.856958] ? _raw_spin_unlock_irq+0x47/0x80 [ 28.856990] ? calculate_sigpending+0x7b/0xa0 [ 28.857023] ? __pfx_kthread+0x10/0x10 [ 28.857056] ret_from_fork+0x41/0x80 [ 28.857089] ? __pfx_kthread+0x10/0x10 [ 28.857143] ret_from_fork_asm+0x1a/0x30 [ 28.857194] </TASK> [ 28.857213] [ 28.872074] Allocated by task 306: [ 28.872469] kasan_save_stack+0x3d/0x60 [ 28.872950] kasan_save_track+0x18/0x40 [ 28.873469] kasan_save_alloc_info+0x3b/0x50 [ 28.874023] __kasan_kmalloc+0xb7/0xc0 [ 28.874431] __kmalloc_noprof+0x1c3/0x500 [ 28.874906] kunit_kmalloc_array+0x25/0x60 [ 28.875437] copy_user_test_oob+0xab/0x1130 [ 28.876025] kunit_try_run_case+0x1b2/0x490 [ 28.876371] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.876709] kthread+0x323/0x710 [ 28.877094] ret_from_fork+0x41/0x80 [ 28.877532] ret_from_fork_asm+0x1a/0x30 [ 28.877979] [ 28.878241] The buggy address belongs to the object at ffff88810305ae00 [ 28.878241] which belongs to the cache kmalloc-128 of size 128 [ 28.879023] The buggy address is located 0 bytes inside of [ 28.879023] allocated 120-byte region [ffff88810305ae00, ffff88810305ae78) [ 28.880298] [ 28.880649] The buggy address belongs to the physical page: [ 28.881285] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10305a [ 28.882158] flags: 0x200000000000000(node=0|zone=2) [ 28.882738] page_type: f5(slab) [ 28.883202] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 28.883886] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 28.884567] page dumped because: kasan: bad access detected [ 28.885285] [ 28.885488] Memory state around the buggy address: [ 28.886197] ffff88810305ad00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.886682] ffff88810305ad80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.887600] >ffff88810305ae00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.888421] ^ [ 28.888793] ffff88810305ae80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.889218] ffff88810305af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.889993] ==================================================================