------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4755! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5353 Comm: syz.0.0 Not tainted 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4755 Code: e8 d4 c7 aa ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 10 e0 45 ff 90 0f 0b e8 08 e0 45 ff 90 0f 0b e8 00 e0 45 ff 90 <0f> 0b e8 f8 df 45 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000d4df408 EFLAGS: 00010293 RAX: ffffffff8279da30 RBX: 00000000ffffffff RCX: ffff888000b9c880 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 1ffff110085f479d R08: ffff888042fa4333 R09: 1ffff110085f4866 R10: dffffc0000000000 R11: ffffed10085f4867 R12: 0000000000000004 R13: 0000000000000002 R14: 1ffff110085f4869 R15: ffff888042fa4348 FS: 00007f7f006366c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f00635fc8 CR3: 0000000043830000 CR4: 0000000000352ef0 Call Trace: ext4_mb_use_preallocated+0x660/0x13f0 fs/ext4/mballoc.c:4972 ext4_mb_new_blocks+0x5b4/0x4720 fs/ext4/mballoc.c:6276 ext4_ext_map_blocks+0x161a/0x6ac0 fs/ext4/extents.c:4383 ext4_map_create_blocks fs/ext4/inode.c:609 [inline] ext4_map_blocks+0x860/0x1740 fs/ext4/inode.c:811 ext4_alloc_file_blocks+0x42c/0xdb0 fs/ext4/extents.c:4551 ext4_zero_range+0x39c/0xb90 fs/ext4/extents.c:4644 ext4_fallocate+0x334/0x3d0 fs/ext4/extents.c:4832 vfs_fallocate+0x666/0x7e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7eff78ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7f00636038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f7eff9b6090 RCX: 00007f7eff78ebe9 RDX: 0000000000000fff RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00007f7eff811e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7eff9b6128 R14: 00007f7eff9b6090 R15: 00007ffef871a1f8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4755 Code: e8 d4 c7 aa ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 10 e0 45 ff 90 0f 0b e8 08 e0 45 ff 90 0f 0b e8 00 e0 45 ff 90 <0f> 0b e8 f8 df 45 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000d4df408 EFLAGS: 00010293 RAX: ffffffff8279da30 RBX: 00000000ffffffff RCX: ffff888000b9c880 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 1ffff110085f479d R08: ffff888042fa4333 R09: 1ffff110085f4866 R10: dffffc0000000000 R11: ffffed10085f4867 R12: 0000000000000004 R13: 0000000000000002 R14: 1ffff110085f4869 R15: ffff888042fa4348 FS: 00007f7f006366c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f00635fc8 CR3: 0000000043830000 CR4: 0000000000352ef0