================================================================== 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 ffff88805ef04380 by task syz-executor.5/19286 CPU: 1 PID: 19286 Comm: syz-executor.5 Not tainted 5.16.0-rc4-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+0x8d/0x320 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 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+0xedb/0x18b0 kernel/bpf/hashtab.c:1768 bpf_map_do_batch+0x2dd/0x5c0 kernel/bpf/syscall.c:4221 __sys_bpf+0x288b/0x5980 kernel/bpf/syscall.c:4693 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4735 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: 0033:0x7f9fb7635af9 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:00007f9fb658a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9fb7749028 RCX: 00007f9fb7635af9 RDX: 0000000000000038 RSI: 0000000020000040 RDI: 0000000000000019 RBP: 00007f9fb768fff7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe52067acf R14: 00007f9fb658a300 R15: 0000000000022000 Allocated by task 19286: kasan_save_stack+0x1e/0x50 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+0xa9/0xd0 mm/kasan/common.c:522 kmalloc_node include/linux/slab.h:613 [inline] kvmalloc_node+0x61/0x120 mm/util.c:587 kvmalloc include/linux/slab.h:741 [inline] kvmalloc_array include/linux/slab.h:759 [inline] __htab_map_lookup_and_delete_batch+0x525/0x18b0 kernel/bpf/hashtab.c:1647 bpf_map_do_batch+0x2dd/0x5c0 kernel/bpf/syscall.c:4221 __sys_bpf+0x288b/0x5980 kernel/bpf/syscall.c:4693 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4735 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 ffff88805ef04380 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff88805ef04380, ffff88805ef043c0) The buggy address belongs to the page: page:ffffea00017bc100 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5ef04 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 dead000000000100 dead000000000122 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 1061, ts 76815280851, free_ts 76808792177 prep_new_page mm/page_alloc.c:2418 [inline] get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191 alloc_slab_page mm/slub.c:1793 [inline] allocate_slab mm/slub.c:1930 [inline] new_slab+0x32d/0x4a0 mm/slub.c:1993 ___slab_alloc+0x918/0xfe0 mm/slub.c:3022 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3109 slab_alloc_node mm/slub.c:3200 [inline] slab_alloc mm/slub.c:3242 [inline] __kmalloc+0x2fb/0x340 mm/slub.c:4419 kmalloc include/linux/slab.h:595 [inline] kzalloc include/linux/slab.h:724 [inline] lsm_task_alloc security/security.c:614 [inline] security_task_alloc+0x10b/0x250 security/security.c:1644 copy_process+0x2132/0x75a0 kernel/fork.c:2173 kernel_clone+0xe7/0xab0 kernel/fork.c:2582 kernel_thread+0xb5/0xf0 kernel/fork.c:2634 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:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 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+0x374/0x870 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3388 kasan_depopulate_vmalloc_pte+0x5c/0x70 mm/kasan/shadow.c:380 apply_to_pte_range mm/memory.c:2518 [inline] apply_to_pmd_range mm/memory.c:2562 [inline] apply_to_pud_range mm/memory.c:2598 [inline] apply_to_p4d_range mm/memory.c:2634 [inline] __apply_to_page_range+0x694/0x1080 mm/memory.c:2668 kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:490 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1708 try_purge_vmap_area_lazy mm/vmalloc.c:1727 [inline] free_vmap_area_noflush+0xa5b/0xd10 mm/vmalloc.c:1769 free_unmap_vmap_area mm/vmalloc.c:1782 [inline] remove_vm_area+0x1ca/0x230 mm/vmalloc.c:2528 vm_remove_mappings mm/vmalloc.c:2557 [inline] __vunmap+0x392/0xb70 mm/vmalloc.c:2622 free_work+0x58/0x70 mm/vmalloc.c:95 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffff88805ef04280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88805ef04300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88805ef04380: 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805ef04400: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff88805ef04480: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ==================================================================