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: 0 PID: 5626 Comm: syz-executor.0 Not tainted 6.2.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 RIP: 0010:dtExtendPage fs/jfs/jfs_dtree.c:1661 [inline] RIP: 0010:dtSplitUp+0x11e8/0x4cf0 fs/jfs/jfs_dtree.c:1034 Code: 8b 4c 24 20 31 db 48 8b 01 48 8d 51 10 48 39 d0 74 07 48 8d 58 e8 48 89 19 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 3d 32 00 00 48 8b 33 48 85 f6 0f 85 c1 18 00 00 RSP: 0018:ffffc90004c977a8 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90004c97ca8 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc90004c97b48 RBP: ffff888072d196b0 R08: 0000000000000001 R09: ffffea0001cc5677 R10: ffff888072d19570 R11: 0000000000000000 R12: ffffc90004c97b40 R13: ffff888072d192e8 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f0ba495e700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056330d999950 CR3: 000000007285f000 CR4: 0000000000350ef0 Call Trace: dtInsert+0x713/0xb40 fs/jfs/jfs_dtree.c:863 jfs_create+0x50f/0x9e0 fs/jfs/namei.c:137 vfs_create fs/namei.c:3118 [inline] vfs_create+0x155/0x310 fs/namei.c:3102 do_mknodat+0x30d/0x4a0 fs/namei.c:3966 __do_sys_mknodat fs/namei.c:3994 [inline] __se_sys_mknodat fs/namei.c:3991 [inline] __x64_sys_mknodat+0xa5/0xd0 fs/namei.c:3991 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: 0033:0x7f0ba388b5f9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0ba495e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 RAX: ffffffffffffffda RBX: 00007f0ba39abf80 RCX: 00007f0ba388b5f9 RDX: 0000000000000008 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f0ba38e67b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000103 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc844e954f R14: 00007f0ba495e300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dtExtendPage fs/jfs/jfs_dtree.c:1661 [inline] RIP: 0010:dtSplitUp+0x11e8/0x4cf0 fs/jfs/jfs_dtree.c:1034 Code: 8b 4c 24 20 31 db 48 8b 01 48 8d 51 10 48 39 d0 74 07 48 8d 58 e8 48 89 19 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 3d 32 00 00 48 8b 33 48 85 f6 0f 85 c1 18 00 00 RSP: 0018:ffffc90004c977a8 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90004c97ca8 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc90004c97b48 RBP: ffff888072d196b0 R08: 0000000000000001 R09: ffffea0001cc5677 R10: ffff888072d19570 R11: 0000000000000000 R12: ffffc90004c97b40 R13: ffff888072d192e8 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f0ba495e700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5be9260300 CR3: 000000007285f000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 8b 4c 24 20 mov 0x20(%rsp),%ecx 4: 31 db xor %ebx,%ebx 6: 48 8b 01 mov (%rcx),%rax 9: 48 8d 51 10 lea 0x10(%rcx),%rdx d: 48 39 d0 cmp %rdx,%rax 10: 74 07 je 0x19 12: 48 8d 58 e8 lea -0x18(%rax),%rbx 16: 48 89 19 mov %rbx,(%rcx) 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 3d 32 00 00 jne 0x3271 34: 48 8b 33 mov (%rbx),%rsi 37: 48 85 f6 test %rsi,%rsi 3a: 0f 85 c1 18 00 00 jne 0x1901