netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'.
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2618!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 4501 Comm: syz-executor5 Not tainted 4.9.135+ #115
task: ffff8801d8daaf80 task.stack: ffff88018ba48000
RIP: 0010:[<ffffffff816c4ee9>]  [<ffffffff816c4ee9>] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618
RSP: 0018:ffff88018ba4f0c8  EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffffea0005b4e340 RCX: ffffc90002f5a000
RDX: 0000000000021d16 RSI: ffffffff816c4ee9 RDI: ffffea0005b4e350
RBP: ffff88018ba4f288 R08: ffff8801d8dab830 R09: 0000000000024bb0
R10: ffffffffffffffe8 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000092 R14: dffffc0000000000 R15: ffff88018ba4f3f0
FS:  00007fa56d3a3700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 00000001d336e000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 1ffff10031749e28 ffff88018ba4f160 ffff88018ba4f3f8 ffff88018ba4f400
 00000002d8dab830 000000000007ffff ffff8801934a64a8 0000000e0000000c
 7fffffffffffff6f ffff88018ba4f1a0 ffff88018ba4f408 ffffed0031749e7f
Call Trace:
 [<ffffffff816d587e>] ext4_writepages+0xeee/0x2e00 fs/ext4/inode.c:2780
 [<ffffffff81433c8f>] do_writepages+0xef/0x1d0 mm/page-writeback.c:2331
 [<ffffffff814119a9>] __filemap_fdatawrite_range+0x1a9/0x250 mm/filemap.c:390
 [<ffffffff81411c79>] filemap_write_and_wait_range+0x59/0xb0 mm/filemap.c:578
 [<ffffffff816dde81>] ext4_direct_IO_read fs/ext4/inode.c:3600 [inline]
 [<ffffffff816dde81>] ext4_direct_IO+0x551/0x29c0 fs/ext4/inode.c:3661
 [<ffffffff8141373b>] generic_file_read_iter+0x83b/0x1a80 mm/filemap.c:1964
 [<ffffffff815aacad>] generic_file_splice_read+0x2bd/0x4e0 fs/splice.c:309
 [<ffffffff815ab32c>] do_splice_to+0x10c/0x170 fs/splice.c:899
 [<ffffffff815ab5cf>] splice_direct_to_actor+0x23f/0x7e0 fs/splice.c:971
 [<ffffffff815abd13>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff8150d770>] do_sendfile+0x4f0/0xc30 fs/read_write.c:1393
 [<ffffffff8150f7e1>] SYSC_sendfile64 fs/read_write.c:1448 [inline]
 [<ffffffff8150f7e1>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82816b93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: fc ff ff 48 89 95 b0 fe ff ff e8 13 66 c5 ff 48 8b 95 b0 fe ff ff 48 8d 42 ff e9 6f ff ff ff e8 fe 65 c5 ff 0f 0b e8 f7 65 c5 ff <0f> 0b 31 c0 89 85 b0 fe ff ff e8 e8 65 c5 ff 8b 85 18 ff ff ff 
RIP  [<ffffffff816c4ee9>] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618
 RSP <ffff88018ba4f0c8>
---[ end trace b102b878fb8dd2be ]---