EXT4-fs error (device loop0): ext4_map_blocks:579: inode #12: block 80: comm syz-executor.0: lblock 0 mapped to illegal pblock 80 (length 1)
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kernel BUG at fs/ext4/ext4.h:3241!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16215 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller-12728-g348551ddaf31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:ext4_get_group_info+0x399/0x3a0 fs/ext4/ext4.h:3241
Code: 4c ff 8b 74 24 04 48 c7 c7 c0 38 0c 8d 4c 89 f2 e8 2c fd 2d 02 43 80 3c 2c 00 0f 85 23 fd ff ff e9 26 fd ff ff e8 07 bd 4c 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:ffffc9000c2d76b8 EFLAGS: 00010293
RAX: ffffffff823ed269 RBX: 00000000ffffebac RCX: ffff88807ea93b80
RDX: 0000000000000000 RSI: 00000000ffffebac RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff823ecf39 R09: fffffbfff1cab886
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110070728cf
R13: dffffc0000000000 R14: ffff888038396000 R15: ffff888038394678
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b9c984558 CR3: 000000002ef5f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_mb_load_buddy_gfp+0xc6/0x850 fs/ext4/mballoc.c:1446
 ext4_discard_preallocations+0x744/0x1090 fs/ext4/mballoc.c:5226
 ext4_release_file+0x16e/0x300 fs/ext4/file.c:166
 __fput+0x3b7/0x890 fs/file_table.c:321
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x68f/0x2290 kernel/exit.c:871
 do_group_exit+0x206/0x2c0 kernel/exit.c:1021
 get_signal+0x1701/0x17e0 kernel/signal.c:2874
 arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efccae8c169
Code: Unable to access opcode bytes at 0x7efccae8c13f.
RSP: 002b:00007efccbb57218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007efccafac058 RCX: 00007efccae8c169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efccafac058
RBP: 00007efccafac050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efccafac05c
R13: 00007fffb5e9111f R14: 00007efccbb57300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_get_group_info+0x399/0x3a0 fs/ext4/ext4.h:3241
Code: 4c ff 8b 74 24 04 48 c7 c7 c0 38 0c 8d 4c 89 f2 e8 2c fd 2d 02 43 80 3c 2c 00 0f 85 23 fd ff ff e9 26 fd ff ff e8 07 bd 4c 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:ffffc9000c2d76b8 EFLAGS: 00010293
RAX: ffffffff823ed269 RBX: 00000000ffffebac RCX: ffff88807ea93b80
RDX: 0000000000000000 RSI: 00000000ffffebac RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff823ecf39 R09: fffffbfff1cab886
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110070728cf
R13: dffffc0000000000 R14: ffff888038396000 R15: ffff888038394678
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f576f1b8718 CR3: 000000002ef5f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400