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BUG: KASAN: null-ptr-deref in mac802154_header_create+0x170/0x600
Write of size 4 at addr 000000000000004c by task kworker/1:10/7110

CPU: 1 UID: 0 PID: 7110 Comm: kworker/1:10 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: mld mld_ifc_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 kasan_report+0x117/0x150
 kasan_check_range+0x264/0x2c0
 mac802154_header_create+0x170/0x600
 neigh_connected_output+0x286/0x460
 ip6_output+0x340/0x550
 NF_HOOK+0xa2/0x3a0
 mld_sendpack+0x8b4/0xe40
 mld_ifc_work+0x835/0xe70
 process_scheduled_works+0xb02/0x1830
 worker_thread+0xa50/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
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