loop5: detected capacity change from 0 to 2048 general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 PID: 1516 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:__nilfs_btree_get_block+0xc8/0x670 fs/nilfs2/btree.c:475 Code: 3c 18 00 0f 85 6c 05 00 00 48 8b 44 24 30 48 8b 98 18 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 30 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 37 05 00 00 48 8b 7b 30 48 8d 84 24 b0 00 00 00 RSP: 0018:ffffc90015ebf430 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8321c7cf RDI: 0000000000000030 RBP: 000000000000003f R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000008c07d R12: ffff8880848c7880 R13: 0000000000000000 R14: ffff888088a8b9c0 R15: 0000000000000000 FS: 00007feebd546700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a5e831000 CR3: 0000000076cda000 CR4: 0000000000350ee0 Call Trace: nilfs_btree_do_lookup+0x3eb/0x7d0 fs/nilfs2/btree.c:569 nilfs_btree_lookup+0x47/0x110 fs/nilfs2/btree.c:686 nilfs_bmap_lookup_at_level+0xcd/0x3e0 fs/nilfs2/bmap.c:69 nilfs_bmap_lookup fs/nilfs2/bmap.h:170 [inline] nilfs_mdt_submit_block+0x1a1/0xaa0 fs/nilfs2/mdt.c:142 nilfs_mdt_read_block+0x92/0x3c0 fs/nilfs2/mdt.c:176 nilfs_mdt_get_block+0xe6/0xdb0 fs/nilfs2/mdt.c:251 nilfs_palloc_get_block+0xc4/0x2b0 fs/nilfs2/alloc.c:216 nilfs_palloc_get_entry_block+0x167/0x1d0 fs/nilfs2/alloc.c:318 nilfs_ifile_get_inode_block+0xbf/0x190 fs/nilfs2/ifile.c:143 __nilfs_read_inode fs/nilfs2/inode.c:477 [inline] nilfs_iget+0x208/0x870 fs/nilfs2/inode.c:603 nilfs_get_root_dentry+0x26/0x240 fs/nilfs2/super.c:904 nilfs_fill_super fs/nilfs2/super.c:1078 [inline] nilfs_mount+0xbb2/0xfb0 fs/nilfs2/super.c:1317 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7feebc48cada Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007feebd545f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007feebc48cada RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 00007feebd545fe0 RBP: 00007feebd546020 R08: 00007feebd546020 R09: 00000000200000c0 R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200000c0 R13: 0000000020000100 R14: 00007feebd545fe0 R15: 0000000020000fc0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__nilfs_btree_get_block+0xc8/0x670 fs/nilfs2/btree.c:475 Code: 3c 18 00 0f 85 6c 05 00 00 48 8b 44 24 30 48 8b 98 18 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 30 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 37 05 00 00 48 8b 7b 30 48 8d 84 24 b0 00 00 00 RSP: 0018:ffffc90015ebf430 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8321c7cf RDI: 0000000000000030 RBP: 000000000000003f R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000008c07d R12: ffff8880848c7880 R13: 0000000000000000 R14: ffff888088a8b9c0 R15: 0000000000000000 FS: 00007feebd546700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c02e73f000 CR3: 0000000076cda000 CR4: 0000000000350ee0 ---------------- Code disassembly (best guess): 0: 3c 18 cmp $0x18,%al 2: 00 0f add %cl,(%rdi) 4: 85 6c 05 00 test %ebp,0x0(%rbp,%rax,1) 8: 00 48 8b add %cl,-0x75(%rax) b: 44 24 30 rex.R and $0x30,%al e: 48 8b 98 18 01 00 00 mov 0x118(%rax),%rbx 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 8d 7b 30 lea 0x30(%rbx),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 37 05 00 00 jne 0x56b 34: 48 8b 7b 30 mov 0x30(%rbx),%rdi 38: 48 8d 84 24 b0 00 00 lea 0xb0(%rsp),%rax 3f: 00