------------[ cut here ]------------
WARNING: CPU: 1 PID: 5802 at fs/ext4/inode.c:922 ext4_dio_get_block_overwrite fs/ext4/inode.c:922 [inline]
WARNING: CPU: 1 PID: 5802 at fs/ext4/inode.c:922 ext4_dio_get_block_overwrite+0x103/0x120 fs/ext4/inode.c:907
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 5802 Comm: syz-executor.4 Not tainted 4.9.194+ #0
 ffff8801ad79eec8 ffffffff81b67001 0000000000000000 ffffffff82a3b3c0
 00000000ffffffff 0000000000000001 0000000000000009 ffff8801ad79efa8
 ffffffff813fef3a 0000000041b58ab3 ffffffff82e32f55 ffffffff813fed61
Call Trace:
 [<00000000e4965b73>] __dump_stack lib/dump_stack.c:15 [inline]
 [<00000000e4965b73>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<00000000bdaa8e2e>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<00000000b4287d7a>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<00000000b37d77e6>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<00000000f29b5244>] ext4_dio_get_block_overwrite fs/ext4/inode.c:922 [inline]
 [<00000000f29b5244>] ext4_dio_get_block_overwrite+0x103/0x120 fs/ext4/inode.c:907
 [<000000009a1e8dfc>] get_more_blocks fs/direct-io.c:654 [inline]
 [<000000009a1e8dfc>] do_direct_IO fs/direct-io.c:956 [inline]
 [<000000009a1e8dfc>] do_blockdev_direct_IO fs/direct-io.c:1275 [inline]
 [<000000009a1e8dfc>] __blockdev_direct_IO+0x3232/0xd370 fs/direct-io.c:1361
 [<000000001bd2b214>] ext4_direct_IO_write fs/ext4/inode.c:3504 [inline]
 [<000000001bd2b214>] ext4_direct_IO+0xd45/0x29b0 fs/ext4/inode.c:3660
 [<00000000c150664d>] generic_file_direct_write+0x293/0x520 mm/filemap.c:2841
 [<00000000de011402>] __generic_file_write_iter+0x20f/0x530 mm/filemap.c:3021
 [<00000000e1abccd2>] ext4_file_write_iter+0x364/0xcd0 fs/ext4/file.c:165
 [<000000004aa7ad24>] vfs_iter_write+0x2e2/0x580 fs/read_write.c:390
 [<0000000019edd28a>] iter_file_splice_write+0x5a9/0xb10 fs/splice.c:768
 [<00000000408bed28>] do_splice_from fs/splice.c:870 [inline]
 [<00000000408bed28>] direct_splice_actor+0x126/0x1a0 fs/splice.c:1037
 [<00000000a73ff9e7>] splice_direct_to_actor+0x2c8/0x820 fs/splice.c:992
 [<0000000088f2af90>] do_splice_direct+0x1a5/0x260 fs/splice.c:1080
 [<00000000cad4484f>] do_sendfile+0x503/0xc00 fs/read_write.c:1402
 [<00000000141fe44d>] SYSC_sendfile64 fs/read_write.c:1463 [inline]
 [<00000000141fe44d>] SyS_sendfile64+0x145/0x160 fs/read_write.c:1449
 [<000000009fff38a1>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<0000000001164ee0>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..