------------[ cut here ]------------
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2827!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6795 Comm: syz.4.215 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ext4_do_writepages+0x479e/0x47a0 fs/ext4/inode.c:2826
Code: c6 20 2a 84 8b e8 b2 ef a5 fe 90 0f 0b e8 da f8 43 ff 4c 89 f7 48 c7 c6 00 2f 84 8b e8 9b ef a5 fe 90 0f 0b e8 c3 f8 43 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6
RSP: 0018:ffffc90006efeac0 EFLAGS: 00010293
RAX: ffffffff8281cf6d RBX: 0000004210000000 RCX: ffff88803fe15d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90006efeed0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100b298a68 R12: ffffc90006eff160
R13: 1ffff92000ddfe2c R14: 0000004000000000 R15: 0000000000000001
FS:  00007f6d2a33e6c0(0000) GS:ffff888125d46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d2a31cff8 CR3: 0000000039b84000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3043
 do_writepages+0x338/0x560 mm/page-writeback.c:2571
 filemap_writeback mm/filemap.c:387 [inline]
 filemap_fdatawrite_range mm/filemap.c:412 [inline]
 file_write_and_wait_range+0x374/0x440 mm/filemap.c:786
 mmb_fsync_noflush+0x76/0x1d0 fs/buffer.c:652
 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline]
 ext4_sync_file+0x423/0xd10 fs/ext4/fsync.c:160
 generic_write_sync include/linux/fs.h:2666 [inline]
 ext4_buffered_write_iter+0x2ca/0x370 fs/ext4/file.c:322
 ext4_file_write_iter+0x94b/0x1c90 fs/ext4/file.c:-1
 iter_file_splice_write+0xa36/0x1240 fs/splice.c:736
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0x104/0x160 fs/splice.c:1159
 splice_direct_to_actor+0x586/0xcc0 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x19b/0x2a0 fs/splice.c:1228
 do_sendfile+0x540/0x7e0 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: 0033:0x7f6d2acde0d9
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:00007f6d2a33e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f6d2af65fa0 RCX: 00007f6d2acde0d9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007f6d2ad75024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000040020fffe81 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6d2af66038 R14: 00007f6d2af65fa0 R15: 00007ffc3f00db68
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x479e/0x47a0 fs/ext4/inode.c:2826
Code: c6 20 2a 84 8b e8 b2 ef a5 fe 90 0f 0b e8 da f8 43 ff 4c 89 f7 48 c7 c6 00 2f 84 8b e8 9b ef a5 fe 90 0f 0b e8 c3 f8 43 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6
RSP: 0018:ffffc90006efeac0 EFLAGS: 00010293
RAX: ffffffff8281cf6d RBX: 0000004210000000 RCX: ffff88803fe15d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90006efeed0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100b298a68 R12: ffffc90006eff160
R13: 1ffff92000ddfe2c R14: 0000004000000000 R15: 0000000000000001
FS:  00007f6d2a33e6c0(0000) GS:ffff888125c46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d2ad2b7c0 CR3: 0000000039b84000 CR4: 00000000003526f0