------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4780!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4780
Code: e8 e6 96 a3 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 e2 78 34 ff 90 0f 0b e8 da 78 34 ff 90 0f 0b e8 d2 78 34 ff 90 <0f> 0b e8 ca 78 34 ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80
RSP: 0018:ffffc9000ef6e9a0 EFLAGS: 00010293
RAX: ffffffff8291f93e RBX: 00000000fffffffd RCX: ffff88801cd1a540
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 1ffff110084db7d7 R08: ffff8880426e0c43 R09: 1ffff110084dc188
R10: dffffc0000000000 R11: ffffed10084dc189 R12: 0000000000000000
R13: 0000000000000004 R14: 1ffff110084dc18b R15: ffff8880426e0c58
FS:  00007fdd890136c0(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5b79f4c000 CR3: 00000000438f2000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ext4_mb_use_preallocated+0x638/0x13e0 fs/ext4/mballoc.c:4997
 ext4_mb_new_blocks+0x5a0/0x4530 fs/ext4/mballoc.c:6301
 ext4_ext_map_blocks+0x1534/0x5850 fs/ext4/extents.c:4461
 ext4_map_create_blocks+0x116/0x530 fs/ext4/inode.c:631
 ext4_map_blocks+0x7e4/0x1240 fs/ext4/inode.c:824
 ext4_iomap_alloc fs/ext4/inode.c:3740 [inline]
 ext4_iomap_begin+0x1387/0x1960 fs/ext4/inode.c:3823
 iomap_iter+0x5f5/0xf80 fs/iomap/iter.c:110
 __iomap_dio_rw+0xcab/0x1de0 fs/iomap/direct-io.c:803
 iomap_dio_rw+0x45/0xb0 fs/iomap/direct-io.c:898
 ext4_dio_write_iter fs/ext4/file.c:592 [inline]
 ext4_file_write_iter+0x1695/0x1c70 fs/ext4/file.c:733
 iter_file_splice_write+0xa31/0x1240 fs/splice.c:736
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1159
 splice_direct_to_actor+0x57b/0xcb0 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x195/0x290 fs/splice.c:1228
 do_sendfile+0x52e/0x7c0 fs/read_write.c:1371
 __do_sys_sendfile64 fs/read_write.c:1432 [inline]
 __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1418
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdd8819ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdd89012fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fdd88416090 RCX: 00007fdd8819ce59
RDX: 0000000000000000 RSI: 000000000000000c RDI: 000000000000000c
RBP: 00007fdd88232e6f R08: 0000000000000000 R09: 0000000000000000
R10: 000000000e3aa6ea R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdd88416128 R14: 00007fdd88416090 R15: 00007ffeaf7519b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4780
Code: e8 e6 96 a3 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 e2 78 34 ff 90 0f 0b e8 da 78 34 ff 90 0f 0b e8 d2 78 34 ff 90 <0f> 0b e8 ca 78 34 ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80
RSP: 0018:ffffc9000ef6e9a0 EFLAGS: 00010293
RAX: ffffffff8291f93e RBX: 00000000fffffffd RCX: ffff88801cd1a540
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 1ffff110084db7d7 R08: ffff8880426e0c43 R09: 1ffff110084dc188
R10: dffffc0000000000 R11: ffffed10084dc189 R12: 0000000000000000
R13: 0000000000000004 R14: 1ffff110084dc18b R15: ffff8880426e0c58
FS:  00007fdd890136c0(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5b79f4c000 CR3: 00000000438f2000 CR4: 0000000000352ef0