EXT4-fs error (device loop4): ext4_map_blocks:601: inode #12: block 80: comm syz-executor.4: lblock 0 mapped to illegal pblock 80 (length 1)
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kernel BUG at fs/ext4/ext4.h:3355!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8110 Comm: syz-executor.4 Not tainted 5.15.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:ext4_get_group_info+0x399/0x3a0 fs/ext4/ext4.h:3355
Code: 61 ff 8b 74 24 04 48 c7 c7 e0 6a a8 8c 4c 89 f2 e8 8c bf 0f 02 43 80 3c 2c 00 0f 85 23 fd ff ff e9 26 fd ff ff e8 67 7c 61 ff <0f> 0b 0f 1f 44 00 00 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00
RSP: 0018:ffffc90002e1f6e0 EFLAGS: 00010293
RAX: ffffffff821efe19 RBX: 00000000ffffe428 RCX: ffff888023555700
RDX: 0000000000000000 RSI: 00000000ffffe428 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff821efae9 R09: ffffed100e89c373
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f5ca8cf
R13: dffffc0000000000 R14: ffff8880315d0000 R15: ffff88807ae54678
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66fc5fa000 CR3: 00000000287b9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_mb_load_buddy_gfp+0xc7/0x1500 fs/ext4/mballoc.c:1498
 ext4_discard_preallocations+0x923/0x10c0 fs/ext4/mballoc.c:5033
 ext4_release_file+0x16d/0x300 fs/ext4/file.c:149
 __fput+0x3bf/0x890 fs/file_table.c:280
 task_work_run+0x129/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0x6a3/0x2480 kernel/exit.c:872
 do_group_exit+0x144/0x310 kernel/exit.c:994
 get_signal+0xc66/0x14e0 kernel/signal.c:2889
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x5d/0x2b0 kernel/entry/common.c:300
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fdd803a60f9
Code: Unable to access opcode bytes at RIP 0x7fdd803a60cf.
RSP: 002b:00007fdd7e918218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fdd804c5f88 RCX: 00007fdd803a60f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fdd804c5f88
RBP: 00007fdd804c5f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdd804c5f8c
R13: 00007fff4bede39f R14: 00007fdd7e918300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace ee13171ce0e29ce2 ]---
RIP: 0010:ext4_get_group_info+0x399/0x3a0 fs/ext4/ext4.h:3355
Code: 61 ff 8b 74 24 04 48 c7 c7 e0 6a a8 8c 4c 89 f2 e8 8c bf 0f 02 43 80 3c 2c 00 0f 85 23 fd ff ff e9 26 fd ff ff e8 67 7c 61 ff <0f> 0b 0f 1f 44 00 00 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00
RSP: 0018:ffffc90002e1f6e0 EFLAGS: 00010293
RAX: ffffffff821efe19 RBX: 00000000ffffe428 RCX: ffff888023555700
RDX: 0000000000000000 RSI: 00000000ffffe428 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff821efae9 R09: ffffed100e89c373
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f5ca8cf
R13: dffffc0000000000 R14: ffff8880315d0000 R15: ffff88807ae54678
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66fc5fa000 CR3: 0000000023c70000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400