===================================================== BUG: KMSAN: uninit-value in arch_atomic64_inc arch/x86/include/asm/atomic64_64.h:88 [inline] BUG: KMSAN: uninit-value in arch_atomic_long_inc include/linux/atomic/atomic-long.h:161 [inline] BUG: KMSAN: uninit-value in atomic_long_inc include/linux/atomic/atomic-instrumented.h:1429 [inline] BUG: KMSAN: uninit-value in __ip6_make_skb+0x3388/0x3620 net/ipv6/ip6_output.c:1969 arch_atomic64_inc arch/x86/include/asm/atomic64_64.h:88 [inline] arch_atomic_long_inc include/linux/atomic/atomic-long.h:161 [inline] atomic_long_inc include/linux/atomic/atomic-instrumented.h:1429 [inline] __ip6_make_skb+0x3388/0x3620 net/ipv6/ip6_output.c:1969 ip6_finish_skb include/net/ipv6.h:1122 [inline] ip6_push_pending_frames+0x113/0x560 net/ipv6/ip6_output.c:2000 rawv6_push_pending_frames+0xbd0/0xe20 net/ipv6/raw.c:583 rawv6_sendmsg+0x2959/0x2e30 net/ipv6/raw.c:926 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:828 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x7f6/0xa70 net/socket.c:2120 __do_sys_sendto net/socket.c:2132 [inline] __se_sys_sendto net/socket.c:2128 [inline] __ia32_sys_sendto+0x11f/0x1c0 net/socket.c:2128 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: slab_post_alloc_hook+0x12d/0xb60 mm/slab.h:766 slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x518/0x920 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c:988 kmalloc_reserve net/core/skbuff.c:492 [inline] __alloc_skb+0x3b8/0x900 net/core/skbuff.c:565 alloc_skb include/linux/skbuff.h:1270 [inline] __ip6_append_data+0x5254/0x6c70 net/ipv6/ip6_output.c:1697 ip6_append_data+0x432/0x5a0 net/ipv6/ip6_output.c:1867 rawv6_sendmsg+0x285d/0x2e30 net/ipv6/raw.c:919 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:828 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x7f6/0xa70 net/socket.c:2120 __do_sys_sendto net/socket.c:2132 [inline] __se_sys_sendto net/socket.c:2128 [inline] __ia32_sys_sendto+0x11f/0x1c0 net/socket.c:2128 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 CPU: 1 PID: 14496 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-81152-g97e36f4aa06f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 =====================================================