================================================================== BUG: KASAN: slab-out-of-bounds in copy_array+0x96/0x100 kernel/bpf/verifier.c:1072 Write of size 32 at addr ffff888023443500 by task syz-executor.2/11892 CPU: 1 PID: 11892 Comm: syz-executor.2 Not tainted 6.1.0-syzkaller-14011-gd75858ef108c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xbf/0x1f0 mm/kasan/report.c:517 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:189 memcpy+0x3d/0x60 mm/kasan/shadow.c:66 copy_array+0x96/0x100 kernel/bpf/verifier.c:1072 copy_verifier_state+0xa9/0xc60 kernel/bpf/verifier.c:1250 pop_stack+0x8c/0x2f0 kernel/bpf/verifier.c:1314 do_check kernel/bpf/verifier.c:14042 [inline] do_check_common+0x5663/0xbca0 kernel/bpf/verifier.c:16300 do_check_main kernel/bpf/verifier.c:16363 [inline] bpf_check+0x7348/0xacc0 kernel/bpf/verifier.c:16947 bpf_prog_load+0x1543/0x2230 kernel/bpf/syscall.c:2619 __sys_bpf+0x1435/0x5000 kernel/bpf/syscall.c:4979 __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] __se_sys_bpf kernel/bpf/syscall.c:5081 [inline] __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5081 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f187a28c0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f187af53168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f187a3abf80 RCX: 00007f187a28c0c9 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 00007f187a2e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce6902f1f R14: 00007f187af53300 R15: 0000000000022000 Allocated by task 11892: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_krealloc+0x145/0x180 mm/kasan/common.c:439 kasan_krealloc include/linux/kasan.h:231 [inline] __do_krealloc mm/slab_common.c:1361 [inline] krealloc+0xa8/0x100 mm/slab_common.c:1398 push_jmp_history+0x13e/0x330 kernel/bpf/verifier.c:2596 do_check kernel/bpf/verifier.c:13782 [inline] do_check_common+0xa68/0xbca0 kernel/bpf/verifier.c:16300 do_check_main kernel/bpf/verifier.c:16363 [inline] bpf_check+0x7348/0xacc0 kernel/bpf/verifier.c:16947 bpf_prog_load+0x1543/0x2230 kernel/bpf/syscall.c:2619 __sys_bpf+0x1435/0x5000 kernel/bpf/syscall.c:4979 __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] __se_sys_bpf kernel/bpf/syscall.c:5081 [inline] __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5081 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488 kvfree_call_rcu+0x78/0x8f0 kernel/rcu/tree.c:3376 kernfs_unlink_open_file+0x3a3/0x4a0 fs/kernfs/file.c:633 kernfs_fop_release+0xeb/0x1e0 fs/kernfs/file.c:805 __fput+0x27c/0xa90 fs/file_table.c:320 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488 kvfree_call_rcu+0x78/0x8f0 kernel/rcu/tree.c:3376 __hw_addr_flush+0x152/0x240 net/core/dev_addr_lists.c:490 dev_addr_flush+0x21/0x60 net/core/dev_addr_lists.c:535 free_netdev+0x1f9/0x620 net/core/dev.c:10708 netdev_run_todo+0xb4e/0x1100 net/core/dev.c:10354 ip_tunnel_delete_nets+0x3a8/0x5c0 net/ipv4/ip_tunnel.c:1127 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888023443500 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 0 bytes inside of 128-byte region [ffff888023443500, ffff888023443580) The buggy address belongs to the physical page: page:ffffea00008d10c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23443 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff8880124418c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080100010 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 4433, tgid 4433 (udevd), ts 273762315806, free_ts 273740638230 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2285 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1a4/0x430 mm/slub.c:3491 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] kernfs_get_open_node fs/kernfs/file.c:572 [inline] kernfs_fop_open+0xaea/0xe70 fs/kernfs/file.c:740 do_dentry_open+0x6cc/0x13f0 fs/open.c:882 do_open fs/namei.c:3557 [inline] path_openat+0x1bbc/0x2a50 fs/namei.c:3714 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3464 __vunmap+0x85d/0xd30 mm/vmalloc.c:2727 free_work+0x5c/0x80 mm/vmalloc.c:100 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff888023443400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc ffff888023443480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888023443500: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888023443580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888023443600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================