EXT4-fs error (device loop4): __ext4_get_inode_loc:4347: comm syz-executor118: Invalid inode table block 5 in block_group 0 ------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:3355! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 317 Comm: syz-executor118 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:ffffc90000ab76c0 EFLAGS: 00010293 RAX: ffffffff81e92455 RBX: 00000000ffffe69e RCX: ffff888119a64f00 RDX: 0000000000000000 RSI: 00000000ffffe69e RDI: 0000000000000001 RBP: ffffc90000ab7750 R08: ffffffff81e91684 R09: ffffed10212697dc R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11022ff7c79 R13: ffff888117fbe3c8 R14: 0000000000000001 R15: ffff8881199e2000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdf0fd17c0 CR3: 000000011ef81000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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: 0033:0x7f5b70bdf4e9 Code: Unable to access opcode bytes at RIP 0x7f5b70bdf4bf. RSP: 002b:00007f5b70b8b2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f5b70c647a0 RCX: 00007f5b70bdf4e9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5b70c647a8 RBP: 00007f5b70c31c58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5b70c316c0 R13: 0030656c69662f2e R14: 6f6f6c2f7665642f R15: 00007f5b70c647a8 Modules linked in: ---[ end trace b136e2eceeb50e55 ]--- 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:ffffc90000ab76c0 EFLAGS: 00010293 RAX: ffffffff81e92455 RBX: 00000000ffffe69e RCX: ffff888119a64f00 RDX: 0000000000000000 RSI: 00000000ffffe69e RDI: 0000000000000001 RBP: ffffc90000ab7750 R08: ffffffff81e91684 R09: ffffed10212697dc R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11022ff7c79 R13: ffff888117fbe3c8 R14: 0000000000000001 R15: ffff8881199e2000 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5b687a8718 CR3: 000000010c3f8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400