Oops: general protection fault, probably for non-canonical address 0xdffffc0000000104: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000820-0x0000000000000827] CPU: 1 UID: 0 PID: 5230 Comm: syz-executor Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2665 [inline] RIP: 0010:diRead+0x154/0xbc0 fs/jfs/jfs_imap.c:316 Code: 8d 5d 80 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 5d 55 d5 fe 4c 8b 33 49 8d 9e 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 3d 55 d5 fe 4c 8b 2b 49 8d 6d 28 RSP: 0018:ffffc90003cf7778 EFLAGS: 00010202 RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001 RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001 RBP: ffff888059889fd8 R08: ffff888059889c7f R09: 1ffff1100b31138f R10: dffffc0000000000 R11: ffffed100b311390 R12: 0000000000000006 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888059889c70 FS: 000055557c43c500(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe1b701ff8 CR3: 0000000062156000 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: 0033:0x7fcf5fb7f227 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:00007ffe1b702288 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 00007fcf5fbf0a14 RCX: 00007fcf5fb7f227 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe1b702340 RBP: 00007ffe1b702340 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe1b703430 R13: 00007fcf5fbf0a14 R14: 0000000000012fbb R15: 00007ffe1b7044f0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2665 [inline] RIP: 0010:diRead+0x154/0xbc0 fs/jfs/jfs_imap.c:316 Code: 8d 5d 80 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 5d 55 d5 fe 4c 8b 33 49 8d 9e 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 3d 55 d5 fe 4c 8b 2b 49 8d 6d 28 RSP: 0018:ffffc90003cf7778 EFLAGS: 00010202 RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001 RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001 RBP: ffff888059889fd8 R08: ffff888059889c7f R09: 1ffff1100b31138f R10: dffffc0000000000 R11: ffffed100b311390 R12: 0000000000000006 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888059889c70 FS: 000055557c43c500(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe1b701ff8 CR3: 0000000062156000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8d 5d 80 lea -0x80(%rbp),%ebx 3: 48 89 d8 mov %rbx,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 5d 55 d5 fe call 0xfed55576 19: 4c 8b 33 mov (%rbx),%r14 1c: 49 8d 9e 20 08 00 00 lea 0x820(%r14),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 3d 55 d5 fe call 0xfed55576 39: 4c 8b 2b mov (%rbx),%r13 3c: 49 8d 6d 28 lea 0x28(%r13),%rbp