Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 UID: 0 PID: 5518 Comm: syz-executor Not tainted 6.11.0-syzkaller-08833-gde5cb0dcb74c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:diRead+0x43c/0xbc0 fs/jfs/jfs_imap.c:342 Code: 08 00 4c 8b 64 24 18 74 08 48 89 ef e8 1d e6 d4 fe 48 8b 5d 00 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 84 05 00 00 8b 1b bf 40 00 00 00 89 de e8 RSP: 0018:ffffc900035ef778 EFLAGS: 00010207 RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020 RBP: ffff88806b420ca0 R08: ffffffff83266330 R09: 1ffff1100f46e5dc R10: dffffc0000000000 R11: ffffed100f46e5dd R12: 0000000000000000 R13: 000000000000001c R14: 0000000000000000 R15: ffff88807a373248 FS: 00005555921fd500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555592220608 CR3: 0000000060468000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_iget+0x86/0x3e0 fs/jfs/inode.c:35 jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469 __lookup_slow+0x28c/0x3f0 fs/namei.c:1732 lookup_slow+0x53/0x70 fs/namei.c:1749 walk_component+0x2e1/0x410 fs/namei.c:2053 lookup_last fs/namei.c:2556 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2580 filename_lookup+0x256/0x610 fs/namei.c:2609 user_path_at+0x3a/0x60 fs/namei.c:3016 ksys_umount fs/namespace.c:2033 [inline] __do_sys_umount fs/namespace.c:2041 [inline] __se_sys_umount fs/namespace.c:2039 [inline] __x64_sys_umount+0xf1/0x170 fs/namespace.c:2039 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f09c197f227 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffdebe5ed98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 00007f09c19f0a14 RCX: 00007f09c197f227 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdebe5ee50 RBP: 00007ffdebe5ee50 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdebe5ff40 R13: 00007f09c19f0a14 R14: 000000000001961f R15: 00007ffdebe61000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:diRead+0x43c/0xbc0 fs/jfs/jfs_imap.c:342 Code: 08 00 4c 8b 64 24 18 74 08 48 89 ef e8 1d e6 d4 fe 48 8b 5d 00 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 84 05 00 00 8b 1b bf 40 00 00 00 89 de e8 RSP: 0018:ffffc900035ef778 EFLAGS: 00010207 RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020 RBP: ffff88806b420ca0 R08: ffffffff83266330 R09: 1ffff1100f46e5dc R10: dffffc0000000000 R11: ffffed100f46e5dd R12: 0000000000000000 R13: 000000000000001c R14: 0000000000000000 R15: ffff88807a373248 FS: 00005555921fd500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff04500ff8 CR3: 0000000060468000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 4c 8b 64 24 18 mov 0x18(%rsp),%r12 7: 74 08 je 0x11 9: 48 89 ef mov %rbp,%rdi c: e8 1d e6 d4 fe call 0xfed4e62e 11: 48 8b 5d 00 mov 0x0(%rbp),%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 84 05 00 00 jne 0x5ba 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