audit: type=1400 audit(1547866386.037:205049): avc:  denied  { create } for  pid=7293 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
audit: type=1400 audit(1547866386.037:205050): avc:  denied  { write } for  pid=7293 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
audit: type=1400 audit(1547866386.057:205051): avc:  denied  { create } for  pid=7297 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2618!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 6907 Comm: kworker/u4:1 Not tainted 4.9.141+ #23
Workqueue: writeback wb_workfn (flush-8:0)
task: ffff8800b7d92f80 task.stack: ffff880066460000
RIP: 0010:[<ffffffff816c4f59>]  [<ffffffff816c4f59>] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618
RSP: 0018:ffff880066467308  EFLAGS: 00010293
RAX: ffff8800b7d92f80 RBX: ffffea0000185e40 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816c4f59 RDI: ffffea0000185e50
RBP: ffff8800664674c8 R08: ffff8800b7d93830 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: dffffc0000000000 R15: ffff880066467630
FS:  0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000008350004 CR3: 0000000028442000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 1ffff1000cc8ce70 ffff8800664673a0 ffff880066467638 ffff880066467640
 00000000b7d93830 0007ffffffffffff ffff8801d46d3c58 000000090000000c
 0000000000000400 ffff8800664673e0 ffff880066467648 ffffed000cc8cec7
Call Trace:
 [<ffffffff816d58ee>] ext4_writepages+0xeee/0x2e00 fs/ext4/inode.c:2780
 [<ffffffff81433d3f>] do_writepages+0xef/0x1d0 mm/page-writeback.c:2331
 [<ffffffff8159eb19>] __writeback_single_inode+0xd9/0x1020 fs/fs-writeback.c:1320
 [<ffffffff8159ff0c>] writeback_sb_inodes+0x4ac/0xe70 fs/fs-writeback.c:1584
 [<ffffffff815a09cb>] __writeback_inodes_wb+0xfb/0x1e0 fs/fs-writeback.c:1653
 [<ffffffff815a0fc2>] wb_writeback+0x512/0xbd0 fs/fs-writeback.c:1762
 [<ffffffff815a408e>] wb_do_writeback fs/fs-writeback.c:1894 [inline]
 [<ffffffff815a408e>] wb_workfn+0x20e/0xe90 fs/fs-writeback.c:1930
 [<ffffffff81131001>] process_one_work+0x831/0x15f0 kernel/workqueue.c:2092
 [<ffffffff81131e96>] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226
 [<ffffffff81142c3d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82817a5c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Code: fc ff ff 48 89 95 b0 fe ff ff e8 23 6b c5 ff 48 8b 95 b0 fe ff ff 48 8d 42 ff e9 6f ff ff ff e8 0e 6b c5 ff 0f 0b e8 07 6b c5 ff <0f> 0b 31 c0 89 85 b0 fe ff ff e8 f8 6a c5 ff 8b 85 18 ff ff ff 
RIP  [<ffffffff816c4f59>] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618
 RSP <ffff880066467308>
---[ end trace 016df916c0a60989 ]---