Hello, syzbot found the following issue on: HEAD commit: 9ccce092 Merge tag 'for-linus-5.13-ofs-1' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=141aec93d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=5ab124e5617a0cfa dashboard link: https://syzkaller.appspot.com/bug?extid=050de9f900eb45b94ef9 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14bd921ed00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+050de9f900eb45b94ef9@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff888128e8efc0 (size 64): comm "syz-executor.1", pid 8445, jiffies 4294969756 (age 19.530s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 10 8a a5 83 ff ff ff ff ................ 00 f6 f4 27 81 88 ff ff 00 40 5a 28 81 88 ff ff ...'.....@Z(.... backtrace: [<ffffffff8146e301>] kmalloc_node include/linux/slab.h:579 [inline] [<ffffffff8146e301>] kvmalloc_node+0x61/0xf0 mm/util.c:587 [<ffffffff8381be3b>] kvmalloc include/linux/mm.h:797 [inline] [<ffffffff8381be3b>] kvzalloc include/linux/mm.h:805 [inline] [<ffffffff8381be3b>] allocate_hook_entries_size net/netfilter/core.c:61 [inline] [<ffffffff8381be3b>] nf_hook_entries_grow+0x31b/0x370 net/netfilter/core.c:128 [<ffffffff8381c19d>] __nf_register_net_hook+0x8d/0x290 net/netfilter/core.c:407 [<ffffffff8381c45f>] nf_register_net_hook+0xbf/0x100 net/netfilter/core.c:541 [<ffffffff8381c4f9>] nf_register_net_hooks+0x59/0xc0 net/netfilter/core.c:557 [<ffffffff83a56452>] arpt_register_table+0x152/0x1e0 net/ipv4/netfilter/arp_tables.c:1548 [<ffffffff83a58a7d>] arptable_filter_table_init+0x3d/0x60 net/ipv4/netfilter/arptable_filter.c:50 [<ffffffff838b85a9>] xt_find_table_lock+0x189/0x290 net/netfilter/x_tables.c:1244 [<ffffffff838b86d7>] xt_request_find_table_lock+0x27/0xb0 net/netfilter/x_tables.c:1275 [<ffffffff83a575b2>] get_info+0xd2/0x430 net/ipv4/netfilter/arp_tables.c:807 [<ffffffff83a57b34>] do_arpt_get_ctl+0x224/0x520 net/ipv4/netfilter/arp_tables.c:1443 [<ffffffff8381e3b7>] nf_getsockopt+0x57/0x80 net/netfilter/nf_sockopt.c:116 [<ffffffff83986b9a>] ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline] [<ffffffff83986b9a>] ip_getsockopt+0xfa/0x140 net/ipv4/ip_sockglue.c:1756 [<ffffffff8399b06b>] tcp_getsockopt+0x4b/0x80 net/ipv4/tcp.c:4251 [<ffffffff8366dc23>] __sys_getsockopt+0x133/0x2f0 net/socket.c:2161 [<ffffffff8366de02>] __do_sys_getsockopt net/socket.c:2176 [inline] [<ffffffff8366de02>] __se_sys_getsockopt net/socket.c:2173 [inline] [<ffffffff8366de02>] __x64_sys_getsockopt+0x22/0x30 net/socket.c:2173 BUG: memory leak unreferenced object 0xffff888128f2fb80 (size 64): comm "syz-executor.1", pid 8445, jiffies 4294969756 (age 19.530s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 10 8a a5 83 ff ff ff ff ................ 00 f6 f4 27 81 88 ff ff 50 40 5a 28 81 88 ff ff ...'....P@Z(.... backtrace: [<ffffffff8146e301>] kmalloc_node include/linux/slab.h:579 [inline] [<ffffffff8146e301>] kvmalloc_node+0x61/0xf0 mm/util.c:587 [<ffffffff8381be3b>] kvmalloc include/linux/mm.h:797 [inline] [<ffffffff8381be3b>] kvzalloc include/linux/mm.h:805 [inline] [<ffffffff8381be3b>] allocate_hook_entries_size net/netfilter/core.c:61 [inline] [<ffffffff8381be3b>] nf_hook_entries_grow+0x31b/0x370 net/netfilter/core.c:128 [<ffffffff8381c19d>] __nf_register_net_hook+0x8d/0x290 net/netfilter/core.c:407 [<ffffffff8381c45f>] nf_register_net_hook+0xbf/0x100 net/netfilter/core.c:541 [<ffffffff8381c4f9>] nf_register_net_hooks+0x59/0xc0 net/netfilter/core.c:557 [<ffffffff83a56452>] arpt_register_table+0x152/0x1e0 net/ipv4/netfilter/arp_tables.c:1548 [<ffffffff83a58a7d>] arptable_filter_table_init+0x3d/0x60 net/ipv4/netfilter/arptable_filter.c:50 [<ffffffff838b85a9>] xt_find_table_lock+0x189/0x290 net/netfilter/x_tables.c:1244 [<ffffffff838b86d7>] xt_request_find_table_lock+0x27/0xb0 net/netfilter/x_tables.c:1275 [<ffffffff83a575b2>] get_info+0xd2/0x430 net/ipv4/netfilter/arp_tables.c:807 [<ffffffff83a57b34>] do_arpt_get_ctl+0x224/0x520 net/ipv4/netfilter/arp_tables.c:1443 [<ffffffff8381e3b7>] nf_getsockopt+0x57/0x80 net/netfilter/nf_sockopt.c:116 [<ffffffff83986b9a>] ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline] [<ffffffff83986b9a>] ip_getsockopt+0xfa/0x140 net/ipv4/ip_sockglue.c:1756 [<ffffffff8399b06b>] tcp_getsockopt+0x4b/0x80 net/ipv4/tcp.c:4251 [<ffffffff8366dc23>] __sys_getsockopt+0x133/0x2f0 net/socket.c:2161 [<ffffffff8366de02>] __do_sys_getsockopt net/socket.c:2176 [inline] [<ffffffff8366de02>] __se_sys_getsockopt net/socket.c:2173 [inline] [<ffffffff8366de02>] __x64_sys_getsockopt+0x22/0x30 net/socket.c:2173 BUG: memory leak unreferenced object 0xffff88812249b100 (size 64): comm "kworker/u4:1", pid 24, jiffies 4294970575 (age 11.350s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 10 8a a5 83 ff ff ff ff ................ 00 f6 f4 27 81 88 ff ff 28 40 5a 28 81 88 ff ff ...'....(@Z(.... backtrace: [<ffffffff8146e301>] kmalloc_node include/linux/slab.h:579 [inline] [<ffffffff8146e301>] kvmalloc_node+0x61/0xf0 mm/util.c:587 [<ffffffff8381b1ad>] kvmalloc include/linux/mm.h:797 [inline] [<ffffffff8381b1ad>] kvzalloc include/linux/mm.h:805 [inline] [<ffffffff8381b1ad>] allocate_hook_entries_size net/netfilter/core.c:61 [inline] [<ffffffff8381b1ad>] __nf_hook_entries_try_shrink+0xfd/0x210 net/netfilter/core.c:248 [<ffffffff8381b96b>] __nf_unregister_net_hook+0x17b/0x280 net/netfilter/core.c:483 [<ffffffff8381baf2>] nf_unregister_net_hook+0x82/0xb0 net/netfilter/core.c:502 [<ffffffff8368fca1>] ops_exit_list+0x41/0x80 net/core/net_namespace.c:175 [<ffffffff83690861>] cleanup_net+0x2c1/0x4d0 net/core/net_namespace.c:595 [<ffffffff8125e109>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<ffffffff8125e9f9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<ffffffff81266268>] kthread+0x178/0x1b0 kernel/kthread.c:313 [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 --- This report is generated by a bot. 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