incfs: mount failed -22 incfs_lookup_dentry err:-40 general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 PID: 2987 Comm: syz-executor.4 Not tainted 6.1.75-syzkaller-00037-gdcb09569bbff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1359 Code: 30 ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 57 0e 77 ff 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 3a 0e 77 ff 48 8b 1b 48 83 c3 0c RSP: 0018:ffffc90000c2eeb8 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 0000000000040000 RDX: ffffc900041e6000 RSI: 00000000000001ce RDI: 00000000000001cf RBP: ffffc90000c2eee0 R08: dffffc0000000000 R09: ffffc90000c2f390 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000c2f3a0 R13: dffffc0000000000 R14: ffffc90000c2f390 R15: ffffc90000c2f390 FS: 00007f4c55d956c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000012b0e2000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_getattr+0x2a/0x310 fs/stat.c:158 ovl_copy_up_one fs/overlayfs/copy_up.c:974 [inline] ovl_copy_up_flags+0x5c8/0x3b40 fs/overlayfs/copy_up.c:1060 ovl_maybe_copy_up+0x15a/0x190 fs/overlayfs/copy_up.c:1092 ovl_open+0x108/0x2a0 fs/overlayfs/file.c:155 do_dentry_open+0x891/0x1250 fs/open.c:884 vfs_open fs/open.c:1015 [inline] dentry_open+0xb8/0x100 fs/open.c:1031 file_open+0x2a7/0x650 fs/incfs/vfs.c:1466 do_dentry_open+0x891/0x1250 fs/open.c:884 vfs_open+0x73/0x80 fs/open.c:1015 do_open fs/namei.c:3633 [inline] path_openat+0x2532/0x2d60 fs/namei.c:3790 do_filp_open+0x230/0x480 fs/namei.c:3817 do_sys_openat2+0x13f/0x850 fs/open.c:1341 do_sys_open fs/open.c:1357 [inline] __do_sys_openat fs/open.c:1373 [inline] __se_sys_openat fs/open.c:1368 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1368 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f4c5507dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4c55d950c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f4c551abf80 RCX: 00007f4c5507dea9 RDX: 0000000000000002 RSI: 0000000020000080 RDI: 000000000000000b RBP: 00007f4c550ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f4c551abf80 R15: 00007ffe5f8e7758 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1359 Code: 30 ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 57 0e 77 ff 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 3a 0e 77 ff 48 8b 1b 48 83 c3 0c RSP: 0018:ffffc90000c2eeb8 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 0000000000040000 RDX: ffffc900041e6000 RSI: 00000000000001ce RDI: 00000000000001cf RBP: ffffc90000c2eee0 R08: dffffc0000000000 R09: ffffc90000c2f390 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000c2f3a0 R13: dffffc0000000000 R14: ffffc90000c2f390 R15: ffffc90000c2f390 FS: 00007f4c55d956c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000012b0e2000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 30 ff xor %bh,%bh 2: 49 8d 5f 08 lea 0x8(%r15),%rbx 6: 48 89 d8 mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 57 0e 77 ff call 0xff770e73 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 30 add $0x30,%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 3a 0e 77 ff call 0xff770e73 39: 48 8b 1b mov (%rbx),%rbx 3c: 48 83 c3 0c add $0xc,%rbx