EXT4-fs (loop1): i_reserved_data_blocks=132 EXT4-fs (loop1): Delayed block allocation failed for inode 18 at logical offset 2052 with max blocks 52 with error 28 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 144 at fs/ext4/ext4_jbd2.c:75 ext4_journal_check_start+0x1e5/0x240 Modules linked in: CPU: 1 PID: 144 Comm: kworker/u4:1 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: writeback wb_workfn (flush-7:1) RIP: 0010:ext4_journal_check_start+0x1e5/0x240 fs/ext4/ext4_jbd2.c:75 Code: 11 18 15 00 48 83 c4 08 bb e2 ff ff ff 89 d8 5b 41 5c 41 5d 41 5e 41 5f c3 e8 b7 28 6b ff bb fb ff ff ff eb e8 e8 ab 28 6b ff <0f> 0b 43 80 7c 25 00 00 0f 85 18 ff ff ff e9 1b ff ff ff 89 d9 80 RSP: 0018:ffffc9000141ee48 EFLAGS: 00010293 RAX: ffffffff821531c5 RBX: 0000000000000004 RCX: ffff888018199dc0 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 0000000000000001 R08: ffffffff821530d5 R09: ffffed100d0bd071 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff1100fcda8cf R14: ffff88807e6d4000 R15: ffff88807e6d4678 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa02d07bf98 CR3: 000000002a1de000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ext4_journal_start_sb+0xbe/0x370 fs/ext4/ext4_jbd2.c:98 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_writepages+0x114f/0x3d10 fs/ext4/inode.c:2811 do_writepages+0x481/0x730 mm/page-writeback.c:2386 __writeback_single_inode+0x15b/0xe30 fs/fs-writeback.c:1647 writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1930 __writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:2001 wb_writeback+0x465/0xc50 fs/fs-writeback.c:2106 wb_check_background_flush fs/fs-writeback.c:2172 [inline] wb_do_writeback fs/fs-writeback.c:2260 [inline] wb_workfn+0xd07/0x1130 fs/fs-writeback.c:2288 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287