kernel BUG at fs/ext4/ext4.h:3247! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 291 Comm: syz-executor139 Not tainted 5.10.178-syzkaller-00127-g43c801dc3325 #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:3247 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xf5d/0x1020 fs/ext4/mballoc.c:1174 Code: ff e8 77 3b c8 ff e9 f0 f2 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 52 f3 ff ff e8 7d 3b c8 ff e9 48 f3 ff ff e8 73 2d 8b ff <0f> 0b e9 62 00 00 00 e8 67 2d 8b ff e9 ef fb ff ff e9 65 00 00 00 RSP: 0018:ffffc90000b77a30 EFLAGS: 00010293 RAX: ffffffff81df45ad RBX: 00000000ffff821c RCX: ffff88811e584f00 RDX: 0000000000000000 RSI: 00000000ffff821c RDI: 0000000000000001 RBP: ffffc90000b77ab0 R08: ffffffff81df373c R09: ffffed1021ff8384 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffff88811e8bd000 R14: 1ffff11023d17879 R15: ffff88811e8bc3c8 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000618348 CR3: 000000011e7e4000 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:4451 ext4_release_file+0x16e/0x310 fs/ext4/file.c:152 __fput+0x309/0x760 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x129/0x190 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xc83/0x2a50 kernel/exit.c:861 do_group_exit+0x141/0x310 kernel/exit.c:983 __do_sys_exit_group kernel/exit.c:994 [inline] __se_sys_exit_group kernel/exit.c:992 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:992 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fa1e8b88569 Code: Unable to access opcode bytes at RIP 0x7fa1e8b8853f. RSP: 002b:00007ffd89c3cc58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fa1e8c0f470 RCX: 00007fa1e8b88569 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffb8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa1e8c0f470 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Modules linked in: ---[ end trace a00a21c7b37d8d2e ]--- RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3247 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xf5d/0x1020 fs/ext4/mballoc.c:1174 Code: ff e8 77 3b c8 ff e9 f0 f2 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 52 f3 ff ff e8 7d 3b c8 ff e9 48 f3 ff ff e8 73 2d 8b ff <0f> 0b e9 62 00 00 00 e8 67 2d 8b ff e9 ef fb ff ff e9 65 00 00 00 RSP: 0018:ffffc90000b77a30 EFLAGS: 00010293 RAX: ffffffff81df45ad RBX: 00000000ffff821c RCX: ffff88811e584f00 RDX: 0000000000000000 RSI: 00000000ffff821c RDI: 0000000000000001 RBP: ffffc90000b77ab0 R08: ffffffff81df373c R09: ffffed1021ff8384 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffff88811e8bd000 R14: 1ffff11023d17879 R15: ffff88811e8bc3c8 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa1e8bdad08 CR3: 000000011e9ba000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400