loop0: detected capacity change from 0 to 32768 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 5450 Comm: syz-executor.0 Not tainted 6.6.0-rc2-syzkaller-00048-g42dc814987c1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:dtExtendPage fs/jfs/jfs_dtree.c:1661 [inline] RIP: 0010:dtSplitUp+0x1754/0x5850 fs/jfs/jfs_dtree.c:1034 Code: 8d 47 10 48 39 c5 74 0c e8 19 fc 8e fe 48 8d 5d e8 49 89 1f e8 0d fc 8e fe 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 bf 3d 00 00 48 8b 2b 31 ff 48 89 ee e8 75 f7 8e RSP: 0018:ffffc900054f76f8 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff82f8ca23 RDI: 0000000000000003 RBP: ffffc900054f7c98 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888070c6b130 R14: ffff888070c6b130 R15: ffffc900054f7c88 FS: 00007f46a6c206c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f46a5b0456e CR3: 000000001f610000 CR4: 0000000000350ee0 Call Trace: dtInsert+0x872/0xb00 fs/jfs/jfs_dtree.c:863 jfs_create+0x63c/0xb10 fs/jfs/namei.c:137 vfs_create fs/namei.c:3197 [inline] vfs_create+0x474/0x6e0 fs/namei.c:3181 do_mknodat+0x405/0x570 fs/namei.c:4048 __do_sys_mknodat fs/namei.c:4076 [inline] __se_sys_mknodat fs/namei.c:4073 [inline] __x64_sys_mknodat+0xad/0xe0 fs/namei.c:4073 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f46a5a7ad79 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f46a6c200c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 RAX: ffffffffffffffda RBX: 00007f46a5b9bf80 RCX: 00007f46a5a7ad79 RDX: 0000000000000008 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f46a5ad7797 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000103 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f46a5b9bf80 R15: 00007fffb6fa2c88 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dtExtendPage fs/jfs/jfs_dtree.c:1661 [inline] RIP: 0010:dtSplitUp+0x1754/0x5850 fs/jfs/jfs_dtree.c:1034 Code: 8d 47 10 48 39 c5 74 0c e8 19 fc 8e fe 48 8d 5d e8 49 89 1f e8 0d fc 8e fe 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 bf 3d 00 00 48 8b 2b 31 ff 48 89 ee e8 75 f7 8e RSP: 0018:ffffc900054f76f8 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff82f8ca23 RDI: 0000000000000003 RBP: ffffc900054f7c98 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888070c6b130 R14: ffff888070c6b130 R15: ffffc900054f7c88 FS: 00007f46a6c206c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055aef3e00950 CR3: 000000001f610000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 8d 47 10 lea 0x10(%rdi),%eax 3: 48 39 c5 cmp %rax,%rbp 6: 74 0c je 0x14 8: e8 19 fc 8e fe call 0xfe8efc26 d: 48 8d 5d e8 lea -0x18(%rbp),%rbx 11: 49 89 1f mov %rbx,(%r15) 14: e8 0d fc 8e fe call 0xfe8efc26 19: 48 89 da mov %rbx,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 bf 3d 00 00 jne 0x3df3 34: 48 8b 2b mov (%rbx),%rbp 37: 31 ff xor %edi,%edi 39: 48 89 ee mov %rbp,%rsi 3c: e8 .byte 0xe8 3d: 75 f7 jne 0x36 3f: 8e .byte 0x8e