EXT4-fs error (device loop7): ext4_map_blocks:617: inode #3: block 9: comm syz.7.225: lblock 0 mapped to illegal pblock 9 (length 1)
EXT4-fs (loop7): Remounting filesystem read-only
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4.h:2984!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 1269 Comm: syz.7.225 Tainted: G        W         5.4.289-syzkaller-00025-g49530c73f82d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2984 [inline]
RIP: 0010:ext4_mb_find_by_goal+0xc36/0xc70 fs/ext4/mballoc.c:1830
Code: fb ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c f6 fb ff ff 48 89 d7 e8 79 65 c8 ff 48 8b 54 24 20 e9 e4 fb ff ff e8 4a 7b 98 ff <0f> 0b e8 d3 1e 6f ff e8 3e 7b 98 ff 0f 0b e8 37 7b 98 ff 0f 0b e8
RSP: 0018:ffff8881e919f400 EFLAGS: 00010283
RAX: ffffffff81cbcf26 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc90009e2f000 RSI: 0000000000000ae9 RDI: 0000000000000aea
RBP: ffff8881e919f510 R08: ffffffff81cbc411 R09: ffffed103bacbe7d
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881d594e3f0 R14: 0000000000000001 R15: 1ffff1103ab29c7e
FS:  00007fe64dbfb6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc5a079a005 CR3: 00000001e2978000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_mb_regular_allocator+0x229/0x10d0 fs/ext4/mballoc.c:2131
 ext4_mb_new_blocks+0x59a/0x2d10 fs/ext4/mballoc.c:4600
 ext4_ext_map_blocks+0x1e70/0x7450 fs/ext4/extents.c:4514
 ext4_map_blocks+0xa2f/0x1ba0 fs/ext4/inode.c:661
 ext4_alloc_file_blocks+0x3b1/0xc20 fs/ext4/extents.c:4703
 ext4_fallocate+0x3b5/0x570 fs/ext4/extents.c:4990
 vfs_fallocate+0x551/0x6b0 fs/open.c:309
 ksys_fallocate fs/open.c:332 [inline]
 __do_sys_fallocate fs/open.c:340 [inline]
 __se_sys_fallocate fs/open.c:338 [inline]
 __x64_sys_fallocate+0xb9/0x100 fs/open.c:338
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fe64f590d29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe64dbfb038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fe64f7a9fa0 RCX: 00007fe64f590d29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009
RBP: 00007fe64f6122a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001a00 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe64f7a9fa0 R15: 00007ffdc00a3498
Modules linked in:
---[ end trace 4f0b6201556419cd ]---
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2984 [inline]
RIP: 0010:ext4_mb_find_by_goal+0xc36/0xc70 fs/ext4/mballoc.c:1830
Code: fb ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c f6 fb ff ff 48 89 d7 e8 79 65 c8 ff 48 8b 54 24 20 e9 e4 fb ff ff e8 4a 7b 98 ff <0f> 0b e8 d3 1e 6f ff e8 3e 7b 98 ff 0f 0b e8 37 7b 98 ff 0f 0b e8
RSP: 0018:ffff8881e919f400 EFLAGS: 00010283
RAX: ffffffff81cbcf26 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc90009e2f000 RSI: 0000000000000ae9 RDI: 0000000000000aea
RBP: ffff8881e919f510 R08: ffffffff81cbc411 R09: ffffed103bacbe7d
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881d594e3f0 R14: 0000000000000001 R15: 1ffff1103ab29c7e
FS:  00007fe64dbfb6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe64dbb8f98 CR3: 00000001e2978000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400