Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 UID: 0 PID: 5636 Comm: syz.0.33 Not tainted 6.12.0-rc5-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 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 5d f0 d3 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:ffffc9000cccf658 EFLAGS: 00010207 RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020 RBP: ffff88801266e4a0 R08: ffffffff832aa440 R09: 1ffff110084fa5dc R10: dffffc0000000000 R11: ffffed10084fa5dd R12: 0000000000000000 R13: 000000000000001c R14: 0000000000000000 R15: ffff8880427d3248 FS: 00007f9f41b686c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc6074e2650 CR3: 000000001f058000 CR4: 0000000000352ef0 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_open fs/namei.c:3573 [inline] open_last_lookups fs/namei.c:3694 [inline] path_openat+0x11a7/0x3590 fs/namei.c:3930 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1441 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: 0033:0x7f9f40d7e719 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:00007f9f41b68038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f9f40f36058 RCX: 00007f9f40d7e719 RDX: 0000000000141042 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f9f40df132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f9f40f36058 R15: 00007ffe20d059b8 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 5d f0 d3 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:ffffc9000cccf658 EFLAGS: 00010207 RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020 RBP: ffff88801266e4a0 R08: ffffffff832aa440 R09: 1ffff110084fa5dc R10: dffffc0000000000 R11: ffffed10084fa5dd R12: 0000000000000000 R13: 000000000000001c R14: 0000000000000000 R15: ffff8880427d3248 FS: 00007f9f41b686c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e120000 CR3: 000000001f058000 CR4: 0000000000352ef0 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 5d f0 d3 fe call 0xfed3f06e 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