------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:3331! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 27536 Comm: syz-executor.2 Not tainted 6.1.21-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:3331 Code: 4f ff 8b 74 24 04 48 c7 c7 00 c5 0b 8d 4c 89 f2 e8 dc 94 24 02 43 80 3c 2c 00 0f 85 23 fd ff ff e9 26 fd ff ff e8 f7 da 4f 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:ffffc90005fdf530 EFLAGS: 00010283 RAX: ffffffff8239ace9 RBX: 00000000ffffffff RCX: 0000000000040000 RDX: ffffc900047f9000 RSI: 000000000000e078 RDI: 000000000000e079 RBP: 0000000000000001 R08: ffffffff8239a9b9 R09: ffffed100849e5fb R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110069dc8cf R13: dffffc0000000000 R14: ffff888034ee6000 R15: ffff888034ee4678 FS: 00007f53227d1700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020024000 CR3: 000000002ef91000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_load_buddy_gfp+0xc3/0x820 fs/ext4/mballoc.c:1448 ext4_discard_preallocations+0x851/0x1150 fs/ext4/mballoc.c:5021 ext4_truncate+0x9a3/0x1290 fs/ext4/inode.c:4269 ext4_truncate_failed_write fs/ext4/truncate.h:22 [inline] ext4_write_end+0x6e9/0x9b0 fs/ext4/inode.c:1358 ext4_da_write_end+0x90/0xa90 fs/ext4/inode.c:3070 generic_perform_write+0x3e9/0x5e0 mm/filemap.c:3765 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285 ext4_file_write_iter+0x1d2/0x18f0 call_write_iter include/linux/fs.h:2205 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7ae/0xba0 fs/read_write.c:584 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5321a8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f53227d1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f5321babf80 RCX: 00007f5321a8c0f9 RDX: 000000000208e24b RSI: 0000000020000000 RDI: 0000000000000006 RBP: 00007f5321ae7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffebde247ff R14: 00007f53227d1300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_get_group_info+0x399/0x3a0 fs/ext4/ext4.h:3331 Code: 4f ff 8b 74 24 04 48 c7 c7 00 c5 0b 8d 4c 89 f2 e8 dc 94 24 02 43 80 3c 2c 00 0f 85 23 fd ff ff e9 26 fd ff ff e8 f7 da 4f 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:ffffc90005fdf530 EFLAGS: 00010283 RAX: ffffffff8239ace9 RBX: 00000000ffffffff RCX: 0000000000040000 RDX: ffffc900047f9000 RSI: 000000000000e078 RDI: 000000000000e079 RBP: 0000000000000001 R08: ffffffff8239a9b9 R09: ffffed100849e5fb R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110069dc8cf R13: dffffc0000000000 R14: ffff888034ee6000 R15: ffff888034ee4678 FS: 00007f53227d1700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f70257ad988 CR3: 000000002ef91000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400