================================================================== BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user include/linux/instrumented.h:118 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user lib/usercopy.c:32 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user+0xc7/0x150 lib/usercopy.c:26 Read of size 42 at addr ffff8880248dce80 by task syz-executor.5/11125 CPU: 0 PID: 11125 Comm: syz-executor.5 Not tainted 5.15.0-rc1-next-20210916-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_copy_to_user include/linux/instrumented.h:118 [inline] _copy_to_user lib/usercopy.c:32 [inline] _copy_to_user+0xc7/0x150 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:200 [inline] __htab_map_lookup_and_delete_batch+0xf19/0x1900 kernel/bpf/hashtab.c:1768 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4176 __sys_bpf+0x2706/0x5df0 kernel/bpf/syscall.c:4647 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff481e3a739 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff47f36f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ff481f3f0f0 RCX: 00007ff481e3a739 RDX: 0000000000000038 RSI: 0000000020000040 RDI: 0000000000000019 RBP: 00007ff481e94cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff481f3f0f0 R13: 00007ffc0e916d0f R14: 00007ff47f36f300 R15: 0000000000022000 Allocated by task 11125: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0xa4/0xd0 mm/kasan/common.c:522 kmalloc_node include/linux/slab.h:618 [inline] kvmalloc_node+0x61/0x120 mm/util.c:587 kvmalloc include/linux/slab.h:751 [inline] kvmalloc_array include/linux/slab.h:772 [inline] __htab_map_lookup_and_delete_batch+0x525/0x1900 kernel/bpf/hashtab.c:1647 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4176 __sys_bpf+0x2706/0x5df0 kernel/bpf/syscall.c:4647 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff8880248dce80 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff8880248dce80, ffff8880248dcec0) The buggy address belongs to the page: page:ffffea0000923700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x248dc flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 0000000700000001 ffff888010c41640 raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 148, ts 188120799784, free_ts 188074822958 prep_new_page mm/page_alloc.c:2424 [inline] get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4153 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5375 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2197 alloc_slab_page mm/slub.c:1763 [inline] allocate_slab mm/slub.c:1900 [inline] new_slab+0x319/0x490 mm/slub.c:1963 ___slab_alloc+0x921/0xfe0 mm/slub.c:2994 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3081 slab_alloc_node mm/slub.c:3172 [inline] slab_alloc mm/slub.c:3214 [inline] __kmalloc+0x305/0x320 mm/slub.c:4387 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:731 [inline] lsm_task_alloc security/security.c:614 [inline] security_task_alloc+0x10b/0x250 security/security.c:1643 copy_process+0x2132/0x7580 kernel/fork.c:2227 kernel_clone+0xe7/0xac0 kernel/fork.c:2635 kernel_thread+0xb5/0xf0 kernel/fork.c:2687 call_usermodehelper_exec_work kernel/umh.c:174 [inline] call_usermodehelper_exec_work+0xcc/0x180 kernel/umh.c:160 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x373/0x860 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3315 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3394 qlink_free mm/kasan/quarantine.c:146 [inline] qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x95/0xb0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3214 [inline] __kmalloc+0x1e7/0x320 mm/slub.c:4387 kmalloc include/linux/slab.h:599 [inline] tomoyo_add_entry security/tomoyo/common.c:2031 [inline] tomoyo_supervisor+0xce8/0xf00 security/tomoyo/common.c:2103 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline] tomoyo_path_number_perm+0x419/0x590 security/tomoyo/file.c:734 security_file_ioctl+0x50/0xb0 security/security.c:1540 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff8880248dcd80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880248dce00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880248dce80: 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880248dcf00: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ffff8880248dcf80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ==================================================================