------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:3331! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 11004 Comm: syz-executor.3 Not tainted 6.1.25-syzkaller-00053-g722f6cc09c1d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3331 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xef8/0xf10 fs/ext4/mballoc.c:1448 Code: 7e 32 c6 ff e9 de f3 ff ff e8 54 e2 7f ff 48 c7 c7 e0 fe cb 86 4c 89 ee 48 89 da e8 72 cc a8 00 e9 50 f2 ff ff e8 38 e2 7f ff <0f> 0b e8 31 e2 7f ff 0f 0b e8 2a e2 7f ff 0f 0b 0f 1f 84 00 00 00 RSP: 0000:ffffc90000d375c8 EFLAGS: 00010293 RAX: ffffffff81f50c58 RBX: 0000000000000001 RCX: ffff888126f59440 RDX: 0000000000000000 RSI: 00000000fffe1885 RDI: 0000000000000001 RBP: ffffc90000d37650 R08: ffffffff81f4fe4c R09: ffffed10200b3d68 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000fffe1885 R13: ffff8881577d4000 R14: ffff8881522863c8 R15: ffff888152286018 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6e68576bf8 CR3: 000000011af78000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_discard_preallocations+0x79c/0xef0 fs/ext4/mballoc.c:5021 ext4_release_file+0x16e/0x310 fs/ext4/file.c:166 __fput+0x3ab/0x870 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x24d/0x2e0 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xbc5/0x2a40 kernel/exit.c:872 do_group_exit+0x21a/0x2d0 kernel/exit.c:1022 get_signal+0x169d/0x1820 kernel/signal.c:2861 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x6b/0xa0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0ffb67cae9 Code: Unable to access opcode bytes at 0x7f0ffb67cabf. RSP: 002b:00007f0ffc2ee178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f0ffb79c058 RCX: 00007f0ffb67cae9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0ffb79c058 RBP: 00007f0ffb79c050 R08: 00007f0ffc2ee6c0 R09: 00007f0ffc2ee6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0ffb79c05c R13: 000000000000006e R14: 00007ffd0cc04a50 R15: 00007ffd0cc04b38 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3331 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xef8/0xf10 fs/ext4/mballoc.c:1448 Code: 7e 32 c6 ff e9 de f3 ff ff e8 54 e2 7f ff 48 c7 c7 e0 fe cb 86 4c 89 ee 48 89 da e8 72 cc a8 00 e9 50 f2 ff ff e8 38 e2 7f ff <0f> 0b e8 31 e2 7f ff 0f 0b e8 2a e2 7f ff 0f 0b 0f 1f 84 00 00 00 RSP: 0000:ffffc90000d375c8 EFLAGS: 00010293 RAX: ffffffff81f50c58 RBX: 0000000000000001 RCX: ffff888126f59440 RDX: 0000000000000000 RSI: 00000000fffe1885 RDI: 0000000000000001 RBP: ffffc90000d37650 R08: ffffffff81f4fe4c R09: ffffed10200b3d68 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000fffe1885 R13: ffff8881577d4000 R14: ffff8881522863c8 R15: ffff888152286018 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31825000 CR3: 000000011af78000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400