general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 PID: 4852 Comm: syz-executor.4 Not tainted 6.1.78-syzkaller-00134-g997e6b3f6a21 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1359 Code: 2f ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 67 a9 76 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 4a a9 76 ff 48 8b 1b 48 83 c3 0c RSP: 0018:ffffc90004427078 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 0000000000040000 RDX: ffffc900012b9000 RSI: 00000000000004c0 RDI: 00000000000004c1 RBP: ffffc900044270a0 R08: dffffc0000000000 R09: ffffc90004427550 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90004427560 R13: dffffc0000000000 R14: ffffc90004427550 R15: ffffc90004427550 FS: 00007f56bdc0e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31a2f000 CR3: 000000011e26c000 CR4: 00000000003506b0 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+0x73/0x80 fs/open.c:1015 do_open fs/namei.c:3627 [inline] path_openat+0x2532/0x2d60 fs/namei.c:3784 do_filp_open+0x230/0x480 fs/namei.c:3811 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: 0033:0x7f56bce7cee9 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:00007f56bdc0e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f56bcfb4070 RCX: 00007f56bce7cee9 RDX: 0000000000000002 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 00007f56bcec947f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f56bcfb4070 R15: 00007ffc0cfb90e8 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: 2f ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 67 a9 76 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 4a a9 76 ff 48 8b 1b 48 83 c3 0c RSP: 0018:ffffc90004427078 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 0000000000040000 RDX: ffffc900012b9000 RSI: 00000000000004c0 RDI: 00000000000004c1 RBP: ffffc900044270a0 R08: dffffc0000000000 R09: ffffc90004427550 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90004427560 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff 49 8d decl -0x73(%rcx) 3: 5f pop %rdi 4: 08 48 89 or %cl,-0x77(%rax) 7: d8 48 c1 fmuls -0x3f(%rax) a: e8 03 42 80 3c call 0x3c804212 f: 28 00 sub %al,(%rax) 11: 74 08 je 0x1b 13: 48 89 df mov %rbx,%rdi 16: e8 67 a9 76 ff call 0xff76a982 1b: 48 8b 1b mov (%rbx),%rbx 1e: 48 83 c3 30 add $0x30,%rbx 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 4a a9 76 ff call 0xff76a982 38: 48 8b 1b mov (%rbx),%rbx 3b: 48 83 c3 0c add $0xc,%rbx