===================================================== BUG: KMSAN: uninit-value in batadv_interface_tx+0x10cf/0x2450 net/batman-adv/soft-interface.c:264 CPU: 0 PID: 10096 Comm: syz-executor.3 Not tainted 5.7.0-rc4-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+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 batadv_interface_tx+0x10cf/0x2450 net/batman-adv/soft-interface.c:264 __netdev_start_xmit include/linux/netdevice.h:4533 [inline] netdev_start_xmit include/linux/netdevice.h:4547 [inline] xmit_one net/core/dev.c:3477 [inline] dev_hard_start_xmit+0x531/0xab0 net/core/dev.c:3493 __dev_queue_xmit+0x2f8d/0x3b20 net/core/dev.c:4052 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4085 hsr_xmit net/hsr/hsr_forward.c:228 [inline] hsr_forward_do net/hsr/hsr_forward.c:285 [inline] hsr_forward_skb+0x2614/0x30d0 net/hsr/hsr_forward.c:361 hsr_handle_frame+0x3be/0x500 net/hsr/hsr_slave.c:44 __netif_receive_skb_core+0x21ce/0x5870 net/core/dev.c:5089 __netif_receive_skb_one_core net/core/dev.c:5186 [inline] __netif_receive_skb net/core/dev.c:5302 [inline] process_backlog+0x936/0x1410 net/core/dev.c:6134 napi_poll net/core/dev.c:6572 [inline] net_rx_action+0x786/0x1aa0 net/core/dev.c:6640 __do_softirq+0x311/0x83d kernel/softirq.c:293 invoke_softirq kernel/softirq.c:375 [inline] irq_exit+0x230/0x280 kernel/softirq.c:416 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:546 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1143 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:834 RIP: 0010:kmsan_get_metadata+0x6/0x180 mm/kmsan/kmsan_shadow.c:175 Code: c7 29 3e a9 bc 48 c7 c6 4a 3e a9 bc 4c 89 f2 31 c0 e8 d0 65 47 ff 0f 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 <41> 56 53 41 89 d6 48 89 fb 48 83 e3 fc 85 d2 48 0f 44 df 40 f6 c7 RSP: 0018:ffffb18301083bf8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: ffffb98301083d58 RBX: ffffb98301083d58 RCX: ffffb18301083d58 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffb18301083d58 RBP: ffffb18301083c00 R08: fffff408c000000f R09: ffff9701efffb000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffb18301083d58 R13: ffff9701e74f3d00 R14: ffffb18301083d58 R15: 0000000000000000 kmsan_get_shadow_origin_ptr+0x81/0xb0 mm/kmsan/kmsan_shadow.c:154 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:54 do_wait+0x328/0xb70 kernel/exit.c:1434 kernel_wait4+0x3e9/0x600 kernel/exit.c:1614 __do_sys_wait4 kernel/exit.c:1626 [inline] __se_sys_wait4+0x168/0x2b0 kernel/exit.c:1622 __x64_sys_wait4+0x56/0x70 kernel/exit.c:1622 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x41690a Code: 0f 83 6a 18 00 00 c3 66 0f 1f 84 00 00 00 00 00 8b 05 8e 30 89 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d4 ff ff ff f7 RSP: 002b:0000000000c9fda8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 000000000041690a RDX: 0000000040000001 RSI: 0000000000c9fde0 RDI: ffffffffffffffff RBP: 0000000000000734 R08: 0000000000000001 R09: 00000000023c3940 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000c R13: 0000000000c9fde0 R14: 0000000000137904 R15: 0000000000c9fdf0 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116 pskb_expand_head+0x38b/0x1b00 net/core/skbuff.c:1636 __skb_pad+0x47f/0x900 net/core/skbuff.c:1804 __skb_put_padto include/linux/skbuff.h:3244 [inline] skb_put_padto include/linux/skbuff.h:3263 [inline] send_hsr_supervision_frame+0x122d/0x1500 net/hsr/hsr_device.c:301 hsr_announce+0x1e2/0x370 net/hsr/hsr_device.c:332 call_timer_fn+0x218/0x510 kernel/time/timer.c:1405 expire_timers kernel/time/timer.c:1450 [inline] __run_timers+0xcff/0x1210 kernel/time/timer.c:1774 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1787 __do_softirq+0x311/0x83d kernel/softirq.c:293 Uninit was created at: kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:144 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:269 [inline] kmsan_alloc_page+0xb9/0x180 mm/kmsan/kmsan_shadow.c:293 __alloc_pages_nodemask+0x56a2/0x5dc0 mm/page_alloc.c:4848 __alloc_pages include/linux/gfp.h:504 [inline] __alloc_pages_node include/linux/gfp.h:517 [inline] alloc_pages_node include/linux/gfp.h:531 [inline] __page_frag_cache_refill mm/page_alloc.c:4923 [inline] page_frag_alloc+0x3ae/0x910 mm/page_alloc.c:4953 __netdev_alloc_skb+0x703/0xbb0 net/core/skbuff.c:456 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2852 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:2862 [inline] batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:558 [inline] batadv_iv_ogm_queue_add+0x10da/0x1900 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+0xd4c/0x1430 net/batman-adv/bat_iv_ogm.c:869 batadv_iv_send_outstanding_bat_ogm_packet+0xbae/0xd50 net/batman-adv/bat_iv_ogm.c:1722 process_one_work+0x1555/0x1f40 kernel/workqueue.c:2268 worker_thread+0xef6/0x2450 kernel/workqueue.c:2414 kthread+0x4b5/0x4f0 kernel/kthread.c:269 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353 =====================================================