Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 UID: 0 PID: 16655 Comm: syz.8.2108 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 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 78 43 e5 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:ffffc90005007718 EFLAGS: 00010207 RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000 RDX: ffffc9000c9dc000 RSI: 00000000000012b3 RDI: 00000000000012b4 RBP: 0000000000000024 R08: ffff8880480aae97 R09: 1ffff110090155d2 R10: dffffc0000000000 R11: ffffed10090155d3 R12: 0000000000000000 R13: ffff88804a4fd2e8 R14: ffff888046fc1ca0 R15: 0000000000000000 FS: 00007fe6cd89e6c0(0000) GS:ffff8881259e8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000012000 CR3: 0000000060476000 CR4: 00000000003526f0 Call Trace: jfs_iget+0x89/0x3e0 fs/jfs/inode.c:35 jfs_lookup+0x1c5/0x380 fs/jfs/namei.c:1469 __lookup_slow+0x297/0x3d0 fs/namei.c:1816 lookup_slow+0x53/0x70 fs/namei.c:1833 walk_component+0x2d2/0x400 fs/namei.c:2137 lookup_last fs/namei.c:2638 [inline] path_lookupat+0x163/0x430 fs/namei.c:2662 filename_lookup+0x212/0x570 fs/namei.c:2691 user_path_at+0x3a/0x60 fs/namei.c:3135 do_mount fs/namespace.c:4122 [inline] __do_sys_mount fs/namespace.c:4324 [inline] __se_sys_mount+0x2d4/0x410 fs/namespace.c:4301 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe6cc98eba9 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:00007fe6cd89e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fe6ccbd6090 RCX: 00007fe6cc98eba9 RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000 RBP: 00007fe6cca11e19 R08: 0000200000002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe6ccbd6128 R14: 00007fe6ccbd6090 R15: 00007fff732e9888 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 78 43 e5 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:ffffc90005007718 EFLAGS: 00010207 RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000 RDX: ffffc9000c9dc000 RSI: 00000000000012b3 RDI: 00000000000012b4 RBP: 0000000000000024 R08: ffff8880480aae97 R09: 1ffff110090155d2 R10: dffffc0000000000 R11: ffffed10090155d3 R12: 0000000000000000 R13: ffff88804a4fd2e8 R14: ffff888046fc1ca0 R15: 0000000000000000 FS: 00007fe6cd89e6c0(0000) GS:ffff888125ae8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff218c92000 CR3: 0000000060476000 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 78 43 e5 fe call 0xfee5438a 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