------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:3331! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 334 Comm: syz-executor217 Not tainted 6.1.25-syzkaller-00172-g10e4c804f2f9 #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:3331 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xef8/0xf10 fs/ext4/mballoc.c:1448 Code: ae 6f c6 ff e9 de f3 ff ff e8 f4 0c 81 ff 48 c7 c7 20 84 8b 86 4c 89 ee 48 89 da e8 52 32 a7 00 e9 50 f2 ff ff e8 d8 0c 81 ff <0f> 0b e8 d1 0c 81 ff 0f 0b e8 ca 0c 81 ff 0f 0b 0f 1f 84 00 00 00 RSP: 0018:ffffc90000fc75c8 EFLAGS: 00010293 RAX: ffffffff81f28bf8 RBX: 0000000000000001 RCX: ffff88810d19df00 RDX: 0000000000000000 RSI: 00000000ffffe69e RDI: 0000000000000001 RBP: ffffc90000fc7650 R08: ffffffff81f27dec R09: ffffed1022521bcb R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000ffffe69e R13: ffff88810d2ae000 R14: ffff8881099353a8 R15: ffff888109935018 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002004 CR3: 0000000120d08000 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+0xbb0/0x2910 kernel/exit.c:870 do_group_exit+0x21a/0x2d0 kernel/exit.c:1020 get_signal+0x169d/0x1820 kernel/signal.c:2858 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: 0033:0x7f341af194d9 Code: Unable to access opcode bytes at 0x7f341af194af. RSP: 002b:00007f3412b242f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f341af9e7b0 RCX: 00007f341af194d9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f341af9e7b8 RBP: 00007f341af6bc38 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f341af6b6a0 R13: 0030656c69662f2e R14: 6f6f6c2f7665642f R15: 00007f341af9e7b8 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: ae 6f c6 ff e9 de f3 ff ff e8 f4 0c 81 ff 48 c7 c7 20 84 8b 86 4c 89 ee 48 89 da e8 52 32 a7 00 e9 50 f2 ff ff e8 d8 0c 81 ff <0f> 0b e8 d1 0c 81 ff 0f 0b e8 ca 0c 81 ff 0f 0b 0f 1f 84 00 00 00 RSP: 0018:ffffc90000fc75c8 EFLAGS: 00010293 RAX: ffffffff81f28bf8 RBX: 0000000000000001 RCX: ffff88810d19df00 RDX: 0000000000000000 RSI: 00000000ffffe69e RDI: 0000000000000001 RBP: ffffc90000fc7650 R08: ffffffff81f27dec R09: ffffed1022521bcb R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000ffffe69e R13: ffff88810d2ae000 R14: ffff8881099353a8 R15: ffff888109935018 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555735c5e8 CR3: 00000001229af000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400