------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:3248! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 27821 Comm: syz-executor.0 Tainted: G W 5.10.161-syzkaller-00019-g416c4356f372 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3248 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xe54/0xec0 fs/ext4/mballoc.c:1174 Code: ff e8 40 13 c8 ff e9 c8 f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 14 f4 ff ff e8 46 13 c8 ff e9 0a f4 ff ff e8 ec 10 8e ff <0f> 0b e8 e5 10 8e ff 4c 89 ef e8 5d 64 cd ff e9 34 fc ff ff e8 d3 RSP: 0018:ffffc90001db7bb8 EFLAGS: 00010293 RAX: ffffffff81df10c4 RBX: 0000000000000001 RCX: ffff88811dbd13c0 RDX: 0000000000000000 RSI: 00000000ffffe000 RDI: 0000000000000001 RBP: ffffc90001db7c50 R08: ffffffff81df034c R09: ffffed102d51e090 R10: ffffed102d51e090 R11: 1ffff1102d51e08f R12: 1ffff11023b4fa79 R13: ffff88811da79000 R14: 00000000ffffe000 R15: dffffc0000000000 FS: 0000555556b47400(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33825000 CR3: 0000000107de8000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_discard_preallocations+0x803/0xf10 fs/ext4/mballoc.c:4451 ext4_release_file+0x17a/0x320 fs/ext4/file.c:152 __fput+0x348/0x7c0 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xc8/0xe0 kernel/entry/common.c:164 exit_to_user_mode_prepare kernel/entry/common.c:191 [inline] syscall_exit_to_user_mode+0x77/0xa0 kernel/entry/common.c:266 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f045a2c0fab 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 63 fc 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 a1 fc ff ff 8b 44 RSP: 002b:00007ffcbf5228f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f045a2c0fab RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f045a430980 R08: 0000000000000000 R09: 00007f0459e83cc0 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000134c66 R13: 00007ffcbf5229f0 R14: 00007f045a42ef80 R15: 0000000000000032 Modules linked in: ---[ end trace 46e9445f876b9caf ]--- RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3248 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xe54/0xec0 fs/ext4/mballoc.c:1174 Code: ff e8 40 13 c8 ff e9 c8 f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 14 f4 ff ff e8 46 13 c8 ff e9 0a f4 ff ff e8 ec 10 8e ff <0f> 0b e8 e5 10 8e ff 4c 89 ef e8 5d 64 cd ff e9 34 fc ff ff e8 d3 RSP: 0018:ffffc90001db7bb8 EFLAGS: 00010293 RAX: ffffffff81df10c4 RBX: 0000000000000001 RCX: ffff88811dbd13c0 RDX: 0000000000000000 RSI: 00000000ffffe000 RDI: 0000000000000001 RBP: ffffc90001db7c50 R08: ffffffff81df034c R09: ffffed102d51e090 R10: ffffed102d51e090 R11: 1ffff1102d51e08f R12: 1ffff11023b4fa79 R13: ffff88811da79000 R14: 00000000ffffe000 R15: dffffc0000000000 FS: 0000555556b47400(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd209c99718 CR3: 0000000107de8000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400