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:[] [] 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: [] ext4_writepages+0xeee/0x2e00 fs/ext4/inode.c:2780 [] do_writepages+0xef/0x1d0 mm/page-writeback.c:2331 [] __writeback_single_inode+0xd9/0x1020 fs/fs-writeback.c:1320 [] writeback_sb_inodes+0x4ac/0xe70 fs/fs-writeback.c:1584 [] __writeback_inodes_wb+0xfb/0x1e0 fs/fs-writeback.c:1653 [] wb_writeback+0x512/0xbd0 fs/fs-writeback.c:1762 [] wb_do_writeback fs/fs-writeback.c:1894 [inline] [] wb_workfn+0x20e/0xe90 fs/fs-writeback.c:1930 [] process_one_work+0x831/0x15f0 kernel/workqueue.c:2092 [] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] 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 [] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618 RSP ---[ end trace 016df916c0a60989 ]---