audit: type=1400 audit(1542516251.815:2103): avc:  denied  { sys_admin } for  pid=3712 comm="syz-executor4" capability=21  scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1
audit: type=1400 audit(1542516251.935:2104): avc:  denied  { dac_override } for  pid=3719 comm="syz-executor5" capability=1  scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3721 at fs/buffer.c:634 __set_page_dirty+0x188/0x1f0 fs/buffer.c:634
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3721 Comm: syz-executor5 Not tainted 4.9.135+ #117
 ffff880199337370 ffffffff81b42b89 ffffffff82a38ba0 00000000ffffffff
 0000000000000000 0000000000000000 000000000000027a ffff880199337430
 ffffffff813f6aa5 0000000041b58ab3 ffffffff82e2b1c3 ffffffff813f68e6
Call Trace:
 [<ffffffff81b42b89>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42b89>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f6aa5>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f6d74>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff810dbe2c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff815b8148>] __set_page_dirty+0x188/0x1f0 fs/buffer.c:634
 [<ffffffff815b8309>] __set_page_dirty_buffers+0x159/0x230 fs/buffer.c:694
 [<ffffffff8142c982>] set_page_dirty+0x162/0x2d0 mm/page-writeback.c:2554
 [<ffffffff8142cb57>] set_page_dirty_lock+0x67/0xa0 mm/page-writeback.c:2579
 [<ffffffff815ccfca>] dio_bio_complete+0x40a/0x4e0 fs/direct-io.c:495
 [<ffffffff815d6847>] dio_await_completion fs/direct-io.c:517 [inline]
 [<ffffffff815d6847>] do_blockdev_direct_IO fs/direct-io.c:1331 [inline]
 [<ffffffff815d6847>] __blockdev_direct_IO+0x8c27/0xbd10 fs/direct-io.c:1360
 [<ffffffff816de598>] ext4_direct_IO_read fs/ext4/inode.c:3604 [inline]
 [<ffffffff816de598>] ext4_direct_IO+0xc68/0x29c0 fs/ext4/inode.c:3661
 [<ffffffff8141373b>] generic_file_read_iter+0x83b/0x1a80 mm/filemap.c:1964
 [<ffffffff81507dd4>] new_sync_read fs/read_write.c:439 [inline]
 [<ffffffff81507dd4>] __vfs_read+0x3d4/0x560 fs/read_write.c:451
 [<ffffffff8150a794>] vfs_read+0x124/0x390 fs/read_write.c:472
 [<ffffffff8150ebe5>] SYSC_pread64 fs/read_write.c:626 [inline]
 [<ffffffff8150ebe5>] SyS_pread64+0x145/0x170 fs/read_write.c:613
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82816b93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..