netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ------------[ cut here ]------------ ___sys_sendmsg+0x803/0x920 net/socket.c:2115 WARNING: CPU: 1 PID: 81 at net/batman-adv/bat_iv_ogm.c:597 batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:597 [inline] WARNING: CPU: 1 PID: 81 at net/batman-adv/bat_iv_ogm.c:597 batadv_iv_send_outstanding_bat_ogm_packet.cold+0x3f/0x46 net/batman-adv/bat_iv_ogm.c:1853 Kernel panic - not syncing: panic_on_warn set ... __sys_sendmsg+0x105/0x1d0 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c6c9 Code: ad b6 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f50e7becc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f50e7bed6d4 RCX: 000000000045c6c9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 00000000000009cb R14: 00000000004cc6fd R15: 0000000000000004 CPU: 1 PID: 81 Comm: kworker/u4:2 Not tainted 4.19.104-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 batman_adv: batadv0: Adding interface: veth133 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet Call Trace: batman_adv: batadv0: The MTU of interface veth133 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 batman_adv: batadv0: Not using interface veth133 (retrying later): interface not active __warn.cold+0x20/0x53 kernel/panic.c:541 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037 RIP: 0010:batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:597 [inline] RIP: 0010:batadv_iv_send_outstanding_bat_ogm_packet.cold+0x3f/0x46 net/batman-adv/bat_iv_ogm.c:1853 Code: 9c ff ff e8 13 91 36 fa 48 c7 c7 c0 d4 66 88 e8 5b f1 20 fa e9 4d 9c ff ff e8 fd 90 36 fa 48 c7 c7 80 d1 66 88 e8 45 f1 20 fa <0f> 0b e9 35 9c ff ff e8 e5 90 36 fa 48 c7 c7 80 d1 66 88 e8 2d f1 nla_parse: 38 callbacks suppressed netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'. RSP: 0018:ffff8880a940fcc8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff888092496488 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8155a136 RDI: ffffed1015281f8b RBP: ffff8880a940fd30 R08: 0000000000000024 R09: ffffed1015d25079 R10: ffffed1015d25078 R11: ffff8880ae9283c7 R12: ffff88804f3093c0 R13: ffff8880a80f4000 R14: ffff888092496440 R15: ffff88804f3093c0 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 CPU: 0 PID: 13827 Comm: syz-executor.3 Not tainted 4.19.104-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+0x197/0x210 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 __should_failslab+0x121/0x190 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x2ae/0x700 mm/slab.c:3557 kmem_cache_zalloc include/linux/slab.h:699 [inline] __kernfs_new_node+0xef/0x6f0 fs/kernfs/dir.c:633 kernfs_new_node+0x99/0x130 fs/kernfs/dir.c:693 kernfs_create_link+0xdd/0x250 fs/kernfs/symlink.c:40 sysfs_do_create_link_sd.isra.0+0x90/0x130 fs/sysfs/symlink.c:43 sysfs_do_create_link fs/sysfs/symlink.c:79 [inline] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:91 netdev_adjacent_sysfs_add+0xc2/0x100 net/core/dev.c:6940 __netdev_adjacent_dev_insert net/core/dev.c:6995 [inline] __netdev_adjacent_dev_insert+0x4c7/0x700 net/core/dev.c:6963 __netdev_adjacent_dev_link_lists net/core/dev.c:7072 [inline] __netdev_adjacent_dev_link_neighbour net/core/dev.c:7101 [inline] __netdev_upper_dev_link+0x2af/0x7a0 net/core/dev.c:7160 netdev_master_upper_dev_link+0x3a/0x50 net/core/dev.c:7224 batadv_hardif_enable_interface+0x26a/0xb50 net/batman-adv/hard-interface.c:773 batadv_softif_slave_add+0x8f/0x100 net/batman-adv/soft-interface.c:898 do_set_master net/core/rtnetlink.c:2321 [inline] do_set_master+0x1ca/0x230 net/core/rtnetlink.c:2295 do_setlink+0x961/0x3670 net/core/rtnetlink.c:2455 rtnl_newlink+0xbad/0x1600 net/core/rtnetlink.c:3077 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:4777 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4795 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0x105/0x1d0 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c6c9 Code: ad b6 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f50e7becc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f50e7bed6d4 RCX: 000000000045c6c9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 00000000000009cb R14: 00000000004cc6fd R15: 0000000000000005 Kernel Offset: disabled Rebooting in 86400 seconds..