===================================================== BUG: KMSAN: uninit-value in ax25cmp+0x4a2/0x5f0 net/ax25/ax25_addr.c:119 ax25cmp+0x4a2/0x5f0 net/ax25/ax25_addr.c:119 nr_dev_get+0x1c1/0x420 net/netrom/nr_route.c:601 nr_route_frame+0x233/0x1480 net/netrom/nr_route.c:774 nr_xmit+0x9c/0x280 net/netrom/nr_dev.c:144 __netdev_start_xmit include/linux/netdevice.h:4778 [inline] netdev_start_xmit include/linux/netdevice.h:4792 [inline] xmit_one+0x2f4/0x840 net/core/dev.c:3532 dev_hard_start_xmit+0x186/0x440 net/core/dev.c:3548 __dev_queue_xmit+0x22ee/0x3500 net/core/dev.c:4176 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4209 raw_sendmsg+0x819/0xce0 net/ieee802154/socket.c:294 ieee802154_sock_sendmsg+0xec/0x130 net/ieee802154/socket.c:96 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] sock_write_iter+0x594/0x690 net/socket.c:1061 call_write_iter include/linux/fs.h:2050 [inline] new_sync_write fs/read_write.c:504 [inline] vfs_write+0x119f/0x1e80 fs/read_write.c:591 ksys_write+0x28b/0x510 fs/read_write.c:644 __do_sys_write fs/read_write.c:656 [inline] __se_sys_write fs/read_write.c:653 [inline] __ia32_sys_write+0xdb/0x120 fs/read_write.c:653 do_syscall_32_irqs_on arch/x86/entry/common.c:113 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:179 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:204 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:247 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Uninit was created at: slab_post_alloc_hook mm/slab.h:754 [inline] slab_alloc_node mm/slub.c:3231 [inline] __kmalloc_node_track_caller+0xde3/0x14f0 mm/slub.c:4962 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1300 [inline] alloc_skb_with_frags+0x1df/0xd60 net/core/skbuff.c:5995 sock_alloc_send_pskb+0xdf4/0xfc0 net/core/sock.c:2600 sock_alloc_send_skb+0xca/0xe0 net/core/sock.c:2617 raw_sendmsg+0x4cf/0xce0 net/ieee802154/socket.c:277 ieee802154_sock_sendmsg+0xec/0x130 net/ieee802154/socket.c:96 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] sock_write_iter+0x594/0x690 net/socket.c:1061 call_write_iter include/linux/fs.h:2050 [inline] new_sync_write fs/read_write.c:504 [inline] vfs_write+0x119f/0x1e80 fs/read_write.c:591 ksys_write+0x28b/0x510 fs/read_write.c:644 __do_sys_write fs/read_write.c:656 [inline] __se_sys_write fs/read_write.c:653 [inline] __ia32_sys_write+0xdb/0x120 fs/read_write.c:653 do_syscall_32_irqs_on arch/x86/entry/common.c:113 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:179 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:204 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:247 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c CPU: 0 PID: 4811 Comm: syz-executor.1 Not tainted 5.18.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================