print_req_error: I/O error, dev loop0, sector 8
EXT4-fs (loop0): VFS: Can't find ext4 filesystem
EXT4-fs: failed to create workqueue
EXT4-fs (loop3): mount failed
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4.h:2870!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2825 Comm: syz-executor873 Not tainted 4.19.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2870 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xfdd/0x1560 fs/ext4/mballoc.c:1116
Code: 0f 87 3c fc ff ff 4c 89 e7 e8 ef bd a2 ff e9 93 fc ff ff e9 3d fa ff ff e9 9f f7 ff ff 4c 89 e7 e8 e8 35 a8 ff e9 bd fb ff ff <0f> 0b 8b 55 bc 44 89 e6 4c 89 ff e8 53 de ff ff 85 c0 41 89 c5 0f
RSP: 0018:ffff8881dca17bd8 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: ffff8881dca17d50 RCX: 1ffff1103aebfd40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881d75fea00
RBP: ffff8881dca17c48 R08: 1ffff1103ac0c5e0 R09: ffffed10383300d0
R10: ffffed10383300d0 R11: ffff8881c1980683 R12: 00000000fffcef43
R13: ffff8881d75fe9c0 R14: ffff8881f36910c0 R15: ffff8881f3690a40
FS:  0000000001cbb300(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f81f0ff6718 CR3: 00000001d4d31006 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_discard_preallocations+0x9f1/0xe70 fs/ext4/mballoc.c:4089
 ext4_release_file+0x236/0x2b0 fs/ext4/file.c:98
 __fput+0x249/0x7f0 fs/file_table.c:278
 ____fput+0x9/0x10 fs/file_table.c:309
 task_work_run+0x108/0x180 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x185/0x1e0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x413/0x4e0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4074db
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 03 fd ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 41 fd ff ff 8b 44
RSP: 002b:00007fffaf3ae070 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004074db
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fffaf3ae0c0
R13: 00000000004ce52c R14: 00000000004027f0 R15: 00007fffaf3ae130
Modules linked in:
---[ end trace fdd15674111fada1 ]---
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2870 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xfdd/0x1560 fs/ext4/mballoc.c:1116
Code: 0f 87 3c fc ff ff 4c 89 e7 e8 ef bd a2 ff e9 93 fc ff ff e9 3d fa ff ff e9 9f f7 ff ff 4c 89 e7 e8 e8 35 a8 ff e9 bd fb ff ff <0f> 0b 8b 55 bc 44 89 e6 4c 89 ff e8 53 de ff ff 85 c0 41 89 c5 0f
RSP: 0018:ffff8881dca17bd8 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: ffff8881dca17d50 RCX: 1ffff1103aebfd40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881d75fea00
RBP: ffff8881dca17c48 R08: 1ffff1103ac0c5e0 R09: ffffed10383300d0
R10: ffffed10383300d0 R11: ffff8881c1980683 R12: 00000000fffcef43
R13: ffff8881d75fe9c0 R14: ffff8881f36910c0 R15: ffff8881f3690a40
FS:  0000000001cbb300(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffaf3f6a10 CR3: 00000001d4d31001 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400