syzbot

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kernel BUG at fs/ext4/ext4.h:3355!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 329 Comm: syz-executor699 Not tainted 5.15.106-syzkaller-00249-g19c0ed55a470 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3355 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xee5/0xf00 fs/ext4/mballoc.c:1498
Code: 11 0f c8 ff e9 0d f4 ff ff e8 87 c7 86 ff 48 c7 c7 80 81 a9 86 4c 89 fe 4c 89 f2 e8 05 93 9a 00 e9 87 f2 ff ff e8 6b c7 86 ff <0f> 0b e8 64 c7 86 ff 0f 0b e8 5d c7 86 ff 0f 0b 66 2e 0f 1f 84 00
RSP: 0018:ffffc90000af76c0 EFLAGS: 00010293
RAX: ffffffff81e92455 RBX: 00000000ffff821c RCX: ffff888117c13b40
RDX: 0000000000000000 RSI: 00000000ffff821c RDI: 0000000000000001
RBP: ffffc90000af7750 R08: ffffffff81e91684 R09: ffffed1021ecb4f0
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11023177879
R13: ffff888118bbc3c8 R14: 0000000000000001 R15: ffff88811d782000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a533057160 CR3: 000000010c526000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_discard_preallocations+0x79c/0xef0 fs/ext4/mballoc.c:5033
 ext4_release_file+0x16e/0x310 fs/ext4/file.c:151
 __fput+0x3fe/0x910 fs/file_table.c:280
 ____fput+0x15/0x20 fs/file_table.c:308
 task_work_run+0x129/0x190 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xc60/0x2b60 kernel/exit.c:875
 do_group_exit+0x141/0x310 kernel/exit.c:997
 get_signal+0x7a3/0x1630 kernel/signal.c:2891
 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:301
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f574aafe739
Code: Unable to access opcode bytes at RIP 0x7f574aafe70f.
RSP: 002b:00007f574aaaa2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f574ab837a0 RCX: 00007f574aafe739
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f574ab837a8
RBP: 00007f574ab50900 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f574ab506c0
R13: aa0d2915badb3bcf R14: 973f497c5f0c86e9 R15: 00007f574ab837a8
 </TASK>
Modules linked in:
---[ end trace 13d2e162ba08a574 ]---
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3355 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xee5/0xf00 fs/ext4/mballoc.c:1498
Code: 11 0f c8 ff e9 0d f4 ff ff e8 87 c7 86 ff 48 c7 c7 80 81 a9 86 4c 89 fe 4c 89 f2 e8 05 93 9a 00 e9 87 f2 ff ff e8 6b c7 86 ff <0f> 0b e8 64 c7 86 ff 0f 0b e8 5d c7 86 ff 0f 0b 66 2e 0f 1f 84 00
RSP: 0018:ffffc90000af76c0 EFLAGS: 00010293

RAX: ffffffff81e92455 RBX: 00000000ffff821c RCX: ffff888117c13b40
RDX: 0000000000000000 RSI: 00000000ffff821c RDI: 0000000000000001
RBP: ffffc90000af7750 R08: ffffffff81e91684 R09: ffffed1021ecb4f0
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11023177879
R13: ffff888118bbc3c8 R14: 0000000000000001 R15: ffff88811d782000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5742709000 CR3: 000000011dcbd000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400