EXT4-fs (loop6): free_blocks=68451041280
EXT4-fs (loop6): dirty_blocks=16
EXT4-fs (loop6): Block reservation details
EXT4-fs (loop6): i_reserved_data_blocks=1
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2826!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 27664 Comm: syz.6.1334 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:ext4_do_writepages+0x465f/0x4670
Code: c6 e0 4d e4 8b e8 a1 e7 a0 fe 90 0f 0b e8 39 9c 3e ff 4c 89 f7 48 c7 c6 c0 52 e4 8b e8 8a e7 a0 fe 90 0f 0b e8 22 9c 3e ff 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc9000419eda0 EFLAGS: 00010293
RAX: ffffffff8287268e RBX: 0000004210000000 RCX: ffff8881bb3a1d80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000419f1b0 R08: ffff88811d03a5d7 R09: 1ffff11023a074ba
R10: dffffc0000000000 R11: ffffed1023a074bb R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff11022e284c5
FS:  00007f62579136c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001580 CR3: 0000000112c86000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0
 do_writepages+0x32e/0x550
 file_write_and_wait_range+0x36e/0x440
 mmb_fsync_noflush+0x76/0x1c0
 ext4_sync_file+0x437/0xd50
 ext4_buffered_write_iter+0x2ca/0x3a0
 ext4_file_write_iter+0x298/0x1bf0
 do_iter_readv_writev+0x619/0x8c0
 vfs_writev+0x33c/0x990
 __se_sys_pwritev2+0x184/0x2a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f625699cdd9
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:00007f6257913028 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f6256c15fa0 RCX: 00007f625699cdd9
RDX: 0000000000000002 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007f6256a32d69 R08: 0000000001020884 R09: 0000000000000012
R10: 0000000001002020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6256c16038 R14: 00007f6256c15fa0 R15: 00007fff97f3b628
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x465f/0x4670
Code: c6 e0 4d e4 8b e8 a1 e7 a0 fe 90 0f 0b e8 39 9c 3e ff 4c 89 f7 48 c7 c6 c0 52 e4 8b e8 8a e7 a0 fe 90 0f 0b e8 22 9c 3e ff 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc9000419eda0 EFLAGS: 00010293
RAX: ffffffff8287268e RBX: 0000004210000000 RCX: ffff8881bb3a1d80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000419f1b0 R08: ffff88811d03a5d7 R09: 1ffff11023a074ba
R10: dffffc0000000000 R11: ffffed1023a074bb R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff11022e284c5
FS:  00007f62579136c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001580 CR3: 0000000112c86000 CR4: 00000000000006f0
