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BUG: KMSAN: uninit-value in batadv_interface_tx+0x772/0x1e40 net/batman-adv/soft-interface.c:226
CPU: 0 PID: 14941 Comm: syz-executor.4 Not tainted 5.0.0-rc1+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600
 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313
 batadv_interface_tx+0x772/0x1e40 net/batman-adv/soft-interface.c:226
 __netdev_start_xmit include/linux/netdevice.h:4382 [inline]
 netdev_start_xmit include/linux/netdevice.h:4391 [inline]
 dev_direct_xmit+0x8a3/0xbb0 net/core/dev.c:3930
 packet_direct_xmit+0x256/0x3e0 net/packet/af_packet.c:246
 packet_snd net/packet/af_packet.c:2932 [inline]
 packet_sendmsg+0x79bb/0x9760 net/packet/af_packet.c:2957
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg net/socket.c:631 [inline]
 sock_write_iter+0x3f4/0x4d0 net/socket.c:900
 call_write_iter include/linux/fs.h:1862 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x98a/0xc20 fs/read_write.c:487
 vfs_write+0x481/0x920 fs/read_write.c:549
 ksys_write fs/read_write.c:598 [inline]
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write+0x17a/0x370 fs/read_write.c:607
 __x64_sys_write+0x4a/0x70 fs/read_write.c:607
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457e29
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdd32f4fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29
RDX: 000000000000000e RSI: 0000000020002f40 RDI: 0000000000000004
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdd32f506d4
R13: 00000000004c7228 R14: 00000000004dcda0 R15: 00000000ffffffff

Uninit was created at:
 kmsan_save_stack_with_flags+0x7a/0x130 mm/kmsan/kmsan.c:205
 kmsan_internal_alloc_meta_for_pages+0x113/0x580 mm/kmsan/kmsan_hooks.c:98
 kmsan_alloc_page+0x7e/0x100 mm/kmsan/kmsan_hooks.c:396
 __alloc_pages_nodemask+0x137b/0x5e30 mm/page_alloc.c:4572
 alloc_pages_current+0x69d/0x9b0 mm/mempolicy.c:2106
 alloc_pages include/linux/gfp.h:511 [inline]
 alloc_slab_page mm/slub.c:1492 [inline]
 allocate_slab mm/slub.c:1637 [inline]
 new_slab+0x3c6/0x20b0 mm/slub.c:1711
 new_slab_objects mm/slub.c:2465 [inline]
 ___slab_alloc+0x1577/0x2060 mm/slub.c:2617
 __slab_alloc mm/slub.c:2657 [inline]
 slab_alloc_node mm/slub.c:2720 [inline]
 slab_alloc mm/slub.c:2762 [inline]
 kmem_cache_alloc+0xae8/0xb60 mm/slub.c:2767
 sk_prot_alloc+0xf1/0x500 net/core/sock.c:1471
 sk_alloc+0xde/0xb90 net/core/sock.c:1531
 inet_create+0x76f/0x1320 net/ipv4/af_inet.c:321
 __sock_create+0x65f/0xf30 net/socket.c:1277
 sock_create net/socket.c:1317 [inline]
 __sys_socket+0x174/0x640 net/socket.c:1347
 __do_sys_socket net/socket.c:1356 [inline]
 __se_sys_socket+0x8d/0xb0 net/socket.c:1354
 __x64_sys_socket+0x4a/0x70 net/socket.c:1354
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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