IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready
audit: type=1800 audit(1614143857.715:2): pid=9697 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="loop2" ino=17 res=0
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready
------------[ cut here ]------------
IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
kernel BUG at fs/ext4/inode.c:2824!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
Modules linked in:
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
CPU: 0 PID: 9697 Comm: syz-executor.2 Not tainted 4.14.222-syzkaller #0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880990605c0 task.stack: ffff88809b688000
RIP: 0010:ext4_writepages+0x2246/0x2d30 fs/ext4/inode.c:2823
RSP: 0018:ffff88809b68f630 EFLAGS: 00010247
RAX: 0000028410000000 RBX: 0000000000000001 RCX: 1ffff1101320c2b9
RDX: 1ffff110113efafa RSI: 0000000000000000 RDI: ffff8880990615c8
RBP: ffff88809b68f860 R08: 1ffff1101320c1c8 R09: 0000000000002670
R10: ffff88809b68f3d0 R11: ffff8880990605c0 R12: ffff888099074a40
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
R13: 0000000000000000 R14: ffffed10113efb90 R15: ffff888089f7d970
FS:  00007f1ffe8ce700(0000) GS:ffff8880ba600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f6d9b9000 CR3: 000000009aef5000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
 do_writepages+0xba/0x220 mm/page-writeback.c:2361
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
 __filemap_fdatawrite_range+0x213/0x2d0 mm/filemap.c:346
 file_write_and_wait_range+0x77/0xd0 mm/filemap.c:678
 __generic_file_fsync+0x67/0x1a0 fs/libfs.c:985
 ext4_sync_file+0x938/0x1050 fs/ext4/fsync.c:118
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready
 vfs_fsync_range+0xe8/0x290 fs/sync.c:196
 generic_write_sync include/linux/fs.h:2682 [inline]
 ext4_file_write_iter+0x316/0xe30 fs/ext4/file.c:281
batman_adv: batadv0: Interface activated: batadv_slave_0
 call_write_iter include/linux/fs.h:1778 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x413/0x840 fs/read_write.c:482
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
 vfs_write+0x150/0x4f0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0x100/0x250 fs/read_write.c:582
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
RIP: 0033:0x465a59
RSP: 002b:00007f1ffe8ce188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000055bf40 RCX: 0000000000465a59
RDX: 0000000000000082 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00000000004af682 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf40
R13: 00007ffc8ce25f2f R14: 00007f1ffe8ce300 R15: 0000000000022000
Code: f7 97 87 4c 89 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
ef 
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
e8 ea 16 0b 00 58 44 8b 95 60 fe ff ff 41 be 01 00 00 00 c6 85 18 fe ff 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
ff 01 45 31 ff 45 89 d5 e9 a2 ef ff ff <0f> 0b 48 8b 85 28 fe ff ff 44 8b 8d 64 ff 
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
ff 
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
ff 
batman_adv: batadv0: Interface activated: batadv_slave_1
44 8b 85 60 ff 
RIP: ext4_writepages+0x2246/0x2d30 fs/ext4/inode.c:2823 RSP: ffff88809b68f630
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
---[ end trace a1daf0ebd79b11b2 ]---
device veth0_vlan entered promiscuous mode