bridge0: port 1(bridge_slave_0) entered forwarding state
bridge0: port 2(bridge_slave_1) entered forwarding state
bridge0: port 1(bridge_slave_0) entered forwarding state
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2345!
invalid opcode: 0000 [#1] SMP 
Modules linked in:
CPU: 0 PID: 7541 Comm: syz-executor256 Not tainted 4.1.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88020f9a6a10 ti: ffff880213c94000 task.ti: ffff880213c94000
RIP: 0010:[<ffffffff813f20e0>]  [<ffffffff813f20e0>] mpage_prepare_extent_to_map+0x2e0/0x2f0 fs/ext4/inode.c:2345
RSP: 0018:ffff880213c977f8  EFLAGS: 00010246
RAX: 02fffc0000020039 RBX: ffff880213c97828 RCX: 0000000000000001
RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff880213c978d8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000008
R13: 7fffffffffffffff R14: ffffea00084d2a00 R15: ffff880213c97988
FS:  00007fda96422700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fda9635be78 CR3: 00000000b77a6000 CR4: 00000000001407f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 0000000000000002 ffff8800bb2d3bd0 ffff880213c97858
 ffff880213c97838 0000000000000008 0000000000000007 0000000000000000
 ffffea00084d2a00 ffffea00084e7940 ffffea00082769c0 ffffea000836f440
Call Trace:
 [<ffffffff813f77bf>] ext4_writepages+0x52f/0x1300 fs/ext4/inode.c:2500
 [<ffffffff8127bd7c>] do_writepages+0x1c/0x30 mm/page-writeback.c:2036
 [<ffffffff8126de31>] __filemap_fdatawrite_range+0x51/0x60 mm/filemap.c:284
 [<ffffffff8126df28>] filemap_write_and_wait_range+0x28/0x70 mm/filemap.c:430
 [<ffffffff8126e5f6>] generic_file_direct_write+0x46/0x170 mm/filemap.c:2346
 [<ffffffff8126e7cc>] __generic_file_write_iter+0xac/0x1d0 mm/filemap.c:2550
 [<ffffffff813ebcfd>] ext4_file_write_iter+0x19d/0x4a0 fs/ext4/file.c:170
 [<ffffffff812eaf72>] vfs_iter_write+0x62/0xa0 fs/read_write.c:364
 [<ffffffff81323124>] iter_file_splice_write+0x254/0x3a0 fs/splice.c:1011
 [<ffffffff81322a51>] do_splice_from fs/splice.c:1115 [inline]
 [<ffffffff81322a51>] direct_splice_actor+0x31/0x40 fs/splice.c:1281
 [<ffffffff813233cc>] splice_direct_to_actor+0xcc/0x210 fs/splice.c:1234
 [<ffffffff8132359a>] do_splice_direct+0x8a/0xb0 fs/splice.c:1324
 [<ffffffff812ec09b>] do_sendfile+0x1ab/0x3a0 fs/read_write.c:1227
 [<ffffffff812ecc3f>] SYSC_sendfile64 fs/read_write.c:1282 [inline]
 [<ffffffff812ecc3f>] SyS_sendfile64+0x4f/0xb0 fs/read_write.c:1274
 [<ffffffff8248c1f2>] system_call_fastpath+0x16/0x7a
Code: 96 e7 ff e9 9a fe ff ff 0f 1f 00 be 0d 00 00 00 4c 89 f7 e8 c3 91 e7 ff 49 8b 06 f6 c4 20 0f 84 c9 fe ff ff 0f 0b 0f 1f 44 00 00 <0f> 0b 48 8d bd 50 ff ff ff e8 e2 cf e8 ff eb 8b 55 48 89 e5 41 
RIP  [<ffffffff813f20e0>] mpage_prepare_extent_to_map+0x2e0/0x2f0 fs/ext4/inode.c:2337
 RSP <ffff880213c977f8>
---[ end trace 6c2bc5b545f2e0b3 ]---