kernel BUG at fs/ext4/ext4.h:3355! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3699 Comm: syz-executor416 Not tainted 5.15.105-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:ext4_get_group_info+0x399/0x3a0 fs/ext4/ext4.h:3355 Code: 62 ff 8b 74 24 04 48 c7 c7 60 56 a8 8c 4c 89 f2 e8 fc 03 0a 02 43 80 3c 2c 00 0f 85 23 fd ff ff e9 26 fd ff ff e8 a7 48 62 ff <0f> 0b 0f 1f 44 00 00 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00 RSP: 0018:ffffc90002f6f6e0 EFLAGS: 00010293 RAX: ffffffff821d7219 RBX: 00000000ffffe428 RCX: ffff88801df13a00 RDX: 0000000000000000 RSI: 00000000ffffe428 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff821d6ee9 R09: ffffed100e151730 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f8884cf R13: dffffc0000000000 R14: ffff88807c444000 R15: ffff88807c442678 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb3e570e000 CR3: 0000000074dd4000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_load_buddy_gfp+0xc7/0x1500 fs/ext4/mballoc.c:1498 ext4_discard_preallocations+0x84d/0xfc0 fs/ext4/mballoc.c:5033 ext4_release_file+0x16d/0x300 fs/ext4/file.c:149 __fput+0x3bf/0x890 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x6a3/0x2480 kernel/exit.c:872 do_group_exit+0x144/0x310 kernel/exit.c:994 get_signal+0xc66/0x14e0 kernel/signal.c:2889 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fb3e5761849 Code: Unable to access opcode bytes at RIP 0x7fb3e576181f. RSP: 002b:00007fb3e570d2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fb3e57e67a0 RCX: 00007fb3e5761849 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb3e57e67a8 RBP: 00007fb3e57b3834 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 313cad1a8e7d4acc R13: 0030656c69662f2e R14: 6f6f6c2f7665642f R15: 00007fb3e57e67a8 Modules linked in: ---[ end trace bfc37bb95de5ca32 ]--- RIP: 0010:ext4_get_group_info+0x399/0x3a0 fs/ext4/ext4.h:3355 Code: 62 ff 8b 74 24 04 48 c7 c7 60 56 a8 8c 4c 89 f2 e8 fc 03 0a 02 43 80 3c 2c 00 0f 85 23 fd ff ff e9 26 fd ff ff e8 a7 48 62 ff <0f> 0b 0f 1f 44 00 00 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00 RSP: 0018:ffffc90002f6f6e0 EFLAGS: 00010293 RAX: ffffffff821d7219 RBX: 00000000ffffe428 RCX: ffff88801df13a00 RDX: 0000000000000000 RSI: 00000000ffffe428 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff821d6ee9 R09: ffffed100e151730 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f8884cf R13: dffffc0000000000 R14: ffff88807c444000 R15: ffff88807c442678 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020041000 CR3: 00000000726e9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400