EXT4-fs (sda1): free_blocks=12631
EXT4-fs (sda1): dirty_blocks=438
EXT4-fs (sda1): Block reservation details
EXT4-fs (sda1): i_reserved_data_blocks=168
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5655 at fs/buffer.c:634 __set_page_dirty+0x188/0x1f0 fs/buffer.c:634
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 5655 Comm: syz-executor2 Not tainted 4.9.135+ #113
 ffff8801d3a37200 ffffffff81b36bf9 ffffffff82a38ba0 00000000ffffffff
 0000000000000000 0000000000000001 000000000000027a ffff8801d3a372c0
 ffffffff813f6aa5 0000000041b58ab3 ffffffff82e2a6e3 ffffffff813f68e6
Call Trace:
 [<ffffffff81b36bf9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b36bf9>] 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
 [<ffffffff81507628>] do_iter_readv_writev+0x2f8/0x4b0 fs/read_write.c:693
 [<ffffffff8150b21a>] do_readv_writev+0x2fa/0x7b0 fs/read_write.c:871
 [<ffffffff8150b754>] vfs_readv+0x84/0xc0 fs/read_write.c:897
 [<ffffffff8150bb87>] do_preadv+0x197/0x240 fs/read_write.c:974
 [<ffffffff8150f140>] SYSC_preadv fs/read_write.c:1024 [inline]
 [<ffffffff8150f140>] SyS_preadv+0x30/0x40 fs/read_write.c:1019
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff8280ac13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..