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kernel BUG at fs/ext4/inode.c:2620!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 1042 Comm: kworker/u4:8 Not tainted 6.14.0-rc6-syzkaller-00103-g4003c9e78778 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_do_writepages+0x3de9/0x3df0 fs/ext4/inode.c:2619
Code: cf 8e 4c 89 f2 e8 77 ba af 02 e9 7d fb ff ff e8 6d 59 43 ff 90 0f 0b e8 65 59 43 ff 90 0f 0b e8 6d 37 8a 09 e8 58 59 43 ff 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900025cec20 EFLAGS: 00010293
RAX: ffffffff827e85b8 RBX: 0000004000000000 RCX: ffff88801c7d8000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900025cf030 R08: ffffffff827e4cd5 R09: 1ffff1100358a9f2
R10: dffffc0000000000 R11: ffffed100358a9f3 R12: 0000000000000001
R13: ffffc900025cf520 R14: 0000006210000000 R15: ffff88801ac551f0
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fec0e6440 CR3: 000000004f9ca000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2824
 do_writepages+0x35f/0x880 mm/page-writeback.c:2687
 __writeback_single_inode+0x14f/0x10d0 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x820/0x1360 fs/fs-writeback.c:1976
 wb_writeback+0x413/0xb80 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x410/0x1080 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd30 kernel/workqueue.c:3400
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x3de9/0x3df0 fs/ext4/inode.c:2619
Code: cf 8e 4c 89 f2 e8 77 ba af 02 e9 7d fb ff ff e8 6d 59 43 ff 90 0f 0b e8 65 59 43 ff 90 0f 0b e8 6d 37 8a 09 e8 58 59 43 ff 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900025cec20 EFLAGS: 00010293
RAX: ffffffff827e85b8 RBX: 0000004000000000 RCX: ffff88801c7d8000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900025cf030 R08: ffffffff827e4cd5 R09: 1ffff1100358a9f2
R10: dffffc0000000000 R11: ffffed100358a9f3 R12: 0000000000000001
R13: ffffc900025cf520 R14: 0000006210000000 R15: ffff88801ac551f0
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fec0e6440 CR3: 0000000059c60000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400