=====================================================
BUG: KMSAN: uninit-value in __radix_tree_lookup lib/radix-tree.c:758 [inline]
BUG: KMSAN: uninit-value in radix_tree_lookup+0x409/0x420 lib/radix-tree.c:818
CPU: 0 PID: 27142 Comm: syz-executor.5 Not tainted 5.9.0-rc8-syzkaller #0
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+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122
 __msan_warning+0x55/0x90 mm/kmsan/kmsan_instr.c:201
 __radix_tree_lookup lib/radix-tree.c:758 [inline]
 radix_tree_lookup+0x409/0x420 lib/radix-tree.c:818
 qrtr_tx_resume net/qrtr/qrtr.c:224 [inline]
 qrtr_endpoint_post+0x1172/0x1700 net/qrtr/qrtr.c:498
 qrtr_tun_write_iter+0x216/0x370 net/qrtr/tun.c:92
 call_write_iter include/linux/fs.h:1882 [inline]
 new_sync_write fs/read_write.c:503 [inline]
 vfs_write+0xfba/0x1870 fs/read_write.c:586
 ksys_write+0x2af/0x4d0 fs/read_write.c:639
 __do_sys_write fs/read_write.c:651 [inline]
 __se_sys_write+0x92/0xb0 fs/read_write.c:648
 __x64_sys_write+0x4a/0x70 fs/read_write.c:648
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45de59
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fee27012c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000003aec0 RCX: 000000000045de59
RDX: 00000000000000e4 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 000000000169fb7f R14: 00007fee270139c0 R15: 000000000118bf2c

Uninit was created at:
 kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:143
 kmsan_alloc_page+0xce/0x1d0 mm/kmsan/kmsan_shadow.c:278
 __alloc_pages_nodemask+0x84e/0x1040 mm/page_alloc.c:4938
 __alloc_pages include/linux/gfp.h:509 [inline]
 __alloc_pages_node include/linux/gfp.h:522 [inline]
 alloc_pages_node include/linux/gfp.h:536 [inline]
 __page_frag_cache_refill mm/page_alloc.c:5011 [inline]
 page_frag_alloc+0x35b/0x890 mm/page_alloc.c:5041
 __netdev_alloc_skb+0xbee/0xc50 net/core/skbuff.c:456
 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2841 [inline]
 netdev_alloc_skb_ip_align include/linux/skbuff.h:2851 [inline]
 batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:558 [inline]
 batadv_iv_ogm_queue_add+0x13ba/0x1c60 net/batman-adv/bat_iv_ogm.c:670
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:833 [inline]
 batadv_iv_ogm_schedule+0xe3e/0x1640 net/batman-adv/bat_iv_ogm.c:869
 batadv_iv_send_outstanding_bat_ogm_packet+0xd7b/0xf00 net/batman-adv/bat_iv_ogm.c:1723
 process_one_work+0x1224/0x20a0 kernel/workqueue.c:2269
 worker_thread+0x10cc/0x2740 kernel/workqueue.c:2415
 kthread+0x51c/0x560 kernel/kthread.c:293
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
=====================================================