===================================================== BUG: KMSAN: uninit-value in memcmp lib/string.c:778 [inline] BUG: KMSAN: uninit-value in bcmp+0x14e/0x290 lib/string.c:810 memcmp lib/string.c:778 [inline] bcmp+0x14e/0x290 lib/string.c:810 ip4_obj_cmpfn+0x93/0x110 net/ipv4/ip_fragment.c:726 __rhashtable_lookup include/linux/rhashtable.h:601 [inline] rhashtable_lookup include/linux/rhashtable.h:638 [inline] inet_frag_find+0x591/0x2a60 net/ipv4/inet_fragment.c:362 ip_find net/ipv4/ip_fragment.c:216 [inline] ip_defrag+0x498/0x3d60 net/ipv4/ip_fragment.c:484 nf_ct_ipv4_gather_frags net/ipv4/netfilter/nf_defrag_ipv4.c:31 [inline] ipv4_conntrack_defrag+0x885/0xa30 net/ipv4/netfilter/nf_defrag_ipv4.c:86 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0x184/0x480 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:262 [inline] __ip_local_out+0x779/0x830 net/ipv4/ip_output.c:115 ip_local_out+0xa3/0x1f0 net/ipv4/ip_output.c:124 iptunnel_xmit+0xaaf/0x10e0 net/ipv4/ip_tunnel_core.c:82 ip_tunnel_xmit+0x3392/0x3b20 net/ipv4/ip_tunnel.c:810 __gre_xmit net/ipv4/ip_gre.c:471 [inline] ipgre_xmit+0x1270/0x1300 net/ipv4/ip_gre.c:658 __netdev_start_xmit include/linux/netdevice.h:4994 [inline] netdev_start_xmit include/linux/netdevice.h:5008 [inline] xmit_one+0x2f4/0x840 net/core/dev.c:3590 dev_hard_start_xmit+0x186/0x440 net/core/dev.c:3606 __dev_queue_xmit+0x2104/0x3290 net/core/dev.c:4229 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4262 __bpf_tx_skb net/core/filter.c:2114 [inline] __bpf_redirect_no_mac net/core/filter.c:2139 [inline] __bpf_redirect+0x8fc/0x1840 net/core/filter.c:2162 ____bpf_clone_redirect net/core/filter.c:2429 [inline] bpf_clone_redirect+0x4a5/0x660 net/core/filter.c:2401 ___bpf_prog_run+0x92d/0xb420 kernel/bpf/core.c:1558 __bpf_prog_run512+0x121/0x180 kernel/bpf/core.c:1797 bpf_dispatcher_nop_func include/linux/bpf.h:727 [inline] __bpf_prog_run include/linux/filter.h:626 [inline] bpf_prog_run include/linux/filter.h:633 [inline] bpf_test_run+0x762/0x1040 net/bpf/test_run.c:120 bpf_prog_test_run_skb+0x15c9/0x2100 net/bpf/test_run.c:666 bpf_prog_test_run+0x784/0x820 kernel/bpf/syscall.c:3349 __sys_bpf+0xada/0x1230 kernel/bpf/syscall.c:4651 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __ia32_sys_bpf+0xe1/0x130 kernel/bpf/syscall.c:4735 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Local variable key.i created at: ip_find net/ipv4/ip_fragment.c:206 [inline] ip_defrag+0x306/0x3d60 net/ipv4/ip_fragment.c:484 nf_ct_ipv4_gather_frags net/ipv4/netfilter/nf_defrag_ipv4.c:31 [inline] ipv4_conntrack_defrag+0x885/0xa30 net/ipv4/netfilter/nf_defrag_ipv4.c:86 CPU: 0 PID: 15182 Comm: syz-executor.4 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================