batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2823!
audit: type=1800 audit(1620773822.970:2): pid=9657 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="loop4" ino=17 res=0
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
Modules linked in:
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
CPU: 1 PID: 9657 Comm: syz-executor.4 Not tainted 4.14.232-syzkaller #0
batman_adv: batadv0: Interface activated: batadv_slave_1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888099f58440 task.stack: ffff88809f7c0000
RIP: 0010:ext4_writepages+0x2246/0x2d30 fs/ext4/inode.c:2822
RSP: 0018:ffff88809f7c7630 EFLAGS: 00010247
RAX: 0000028410000000 RBX: 0000000000000001 RCX: 1ffff110133eb289
RDX: 1ffff110115d8c6a RSI: 0000000000000000 RDI: ffff888099f59448
RBP: ffff88809f7c7860 R08: 1ffff110133eb198 R09: 0000000000002626
R10: ffff88809f7c73d0 R11: ffff888099f58440 R12: ffff888099d90cc0
R13: 0000000000000000 R14: ffffed10115d8d00 R15: ffff88808aec64f0
FS:  00007f179ea91700(0000) GS:ffff8880ba700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004e6dc9 CR3: 000000009c782000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready
IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready
 do_writepages+0xba/0x220 mm/page-writeback.c:2361
 __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): vlan1: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_vlan: link is not ready
 vfs_fsync_range+0xe8/0x290 fs/sync.c:196
device veth0_vlan entered promiscuous mode
 generic_write_sync include/linux/fs.h:2682 [inline]
 ext4_file_write_iter+0x316/0xe30 fs/ext4/file.c:281
 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
device veth1_vlan entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready
 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
RIP: 0033:0x465a59
RSP: 002b:00007f179ea91188 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: 00007fff0a5c48af R14: 00007f179ea91300 R15: 0000000000022000
Code: f9 97 87 4c 89 ef e8 da 1a 0b 00 58 44 8b 95 60 fe ff ff 41 be 01 00 00 00 c6 85 18 fe ff 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 ff ff 44 8b 85 60 ff 
RIP: ext4_writepages+0x2246/0x2d30 fs/ext4/inode.c:2822 RSP: ffff88809f7c7630
---[ end trace 4d76331caa46435d ]---