===================================================== BUG: KMSAN: uninit-value in check_entry_size_and_hooks net/ipv4/netfilter/ip_tables.c:599 [inline] BUG: KMSAN: uninit-value in translate_table+0xdbf/0x3c40 net/ipv4/netfilter/ip_tables.c:685 CPU: 0 PID: 12412 Comm: syz-executor.0 Not tainted 5.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x24c/0x2e0 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197 check_entry_size_and_hooks net/ipv4/netfilter/ip_tables.c:599 [inline] translate_table+0xdbf/0x3c40 net/ipv4/netfilter/ip_tables.c:685 translate_compat_table net/ipv4/netfilter/ip_tables.c:1463 [inline] compat_do_replace net/ipv4/netfilter/ip_tables.c:1517 [inline] do_ipt_set_ctl+0x446a/0x56a0 net/ipv4/netfilter/ip_tables.c:1624 nf_setsockopt+0x59e/0x600 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x651f/0x8ab0 net/ipv4/ip_sockglue.c:1435 tcp_setsockopt+0x239/0x270 net/ipv4/tcp.c:3643 sock_common_setsockopt+0x16c/0x1b0 net/core/sock.c:3263 __sys_setsockopt+0x94c/0xd80 net/socket.c:2117 __do_sys_setsockopt net/socket.c:2128 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:2125 __ia32_sys_setsockopt+0x62/0x80 net/socket.c:2125 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline] __do_fast_syscall_32+0x127/0x180 arch/x86/entry/common.c:142 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:168 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:211 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7ff0549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f55ea5fc EFLAGS: 00000296 ORIG_RAX: 000000000000016e RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000000 RDX: 0000000000000040 RSI: 00000000200008c0 RDI: 000000000000027c RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104 kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76 slab_alloc_node mm/slub.c:2922 [inline] __kmalloc_node+0xa3c/0x1440 mm/slub.c:4116 kmalloc_node include/linux/slab.h:577 [inline] kvmalloc_node+0x201/0x3d0 mm/util.c:587 kvmalloc include/linux/mm.h:785 [inline] xt_alloc_table_info+0xce/0x1c0 net/netfilter/x_tables.c:1178 translate_compat_table net/ipv4/netfilter/ip_tables.c:1427 [inline] compat_do_replace net/ipv4/netfilter/ip_tables.c:1517 [inline] do_ipt_set_ctl+0x2978/0x56a0 net/ipv4/netfilter/ip_tables.c:1624 nf_setsockopt+0x59e/0x600 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x651f/0x8ab0 net/ipv4/ip_sockglue.c:1435 tcp_setsockopt+0x239/0x270 net/ipv4/tcp.c:3643 sock_common_setsockopt+0x16c/0x1b0 net/core/sock.c:3263 __sys_setsockopt+0x94c/0xd80 net/socket.c:2117 __do_sys_setsockopt net/socket.c:2128 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:2125 __ia32_sys_setsockopt+0x62/0x80 net/socket.c:2125 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline] __do_fast_syscall_32+0x127/0x180 arch/x86/entry/common.c:142 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:168 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:211 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c =====================================================