Oops: general protection faul[ 334.676739][ T8588] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 UID: 0 PID: 8588 Comm: syz.3.273 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:diRead+0x420/0xb90 fs/jfs/jfs_imap.c:342 Code: 3c 08 00 4c 8b 7c 24 10 74 08 4c 89 f7 e8 c8 21 e6 fe 49 8b 1e 48 83 c3 34 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 a4 05 00 00 8b 1b bf 40 00 00 00 89 de e8 RSP: 0018:ffffc90003e576d8 EFLAGS: 00010207 RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000024 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100b69d9e2 R12: 0000000000000000 R13: ffff88802f0c0ea0 R14: ffff88805cd9a8a0 R15: 0000000000000000 FS: 00007fd98d87d6c0(0000) GS:ffff888126def000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0ada547000 CR3: 00000000542be000 CR4: 00000000003526f0 Call Trace: jfs_iget+0x89/0x470 fs/jfs/inode.c:35 jfs_lookup+0x1c5/0x380 fs/jfs/namei.c:1469 __lookup_slow+0x29d/0x3d0 fs/namei.c:1866 lookup_slow+0x53/0x70 fs/namei.c:1883 walk_component fs/namei.c:2229 [inline] lookup_last fs/namei.c:2730 [inline] path_lookupat+0x3f5/0x8c0 fs/namei.c:2754 filename_lookup+0x212/0x570 fs/namei.c:2783 user_path_at+0x3a/0x60 fs/namei.c:3576 do_sys_truncate+0xa3/0x190 fs/open.c:139 __do_sys_truncate fs/open.c:153 [inline] __se_sys_truncate fs/open.c:151 [inline] __x64_sys_truncate+0x5b/0x70 fs/open.c:151 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd98f63f749 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:00007fd98d87d038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007fd98f896090 RCX: 00007fd98f63f749 RDX: 0000000000000000 RSI: 000000000000e2ff RDI: 0000200000000080 RBP: 00007fd98f6c3f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd98f896128 R14: 00007fd98f896090 R15: 00007ffc728e4c58 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:diRead+0x420/0xb90 fs/jfs/jfs_imap.c:342 Code: 3c 08 00 4c 8b 7c 24 10 74 08 4c 89 f7 e8 c8 21 e6 fe 49 8b 1e 48 83 c3 34 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 a4 05 00 00 8b 1b bf 40 00 00 00 89 de e8 RSP: 0018:ffffc90003e576d8 EFLAGS: 00010207 RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000024 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100b69d9e2 R12: 0000000000000000 R13: ffff88802f0c0ea0 R14: ffff88805cd9a8a0 R15: 0000000000000000 FS: 00007fd98d87d6c0(0000) GS:ffff888126def000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0ada542000 CR3: 00000000542be000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 3c 08 cmp $0x8,%al 2: 00 4c 8b 7c add %cl,0x7c(%rbx,%rcx,4) 6: 24 10 and $0x10,%al 8: 74 08 je 0x12 a: 4c 89 f7 mov %r14,%rdi d: e8 c8 21 e6 fe call 0xfee621da 12: 49 8b 1e mov (%r14),%rbx 15: 48 83 c3 34 add $0x34,%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 a4 05 00 00 jne 0x5da 36: 8b 1b mov (%rbx),%ebx 38: bf 40 00 00 00 mov $0x40,%edi 3d: 89 de mov %ebx,%esi 3f: e8 .byte 0xe8