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: 295 Comm: syz-executor159 Not tainted 5.15.178-syzkaller-00033-g9cecf52dacae #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:d_backing_inode include/linux/dcache.h:562 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1347 Code: 37 ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 77 57 7a 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 5a 57 7a ff 48 8b 1b 48 83 c3 0c RSP: 0018:ffffc90000986ed0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88810cf83b40 RDX: 0000000000000000 RSI: ffffc90000987400 RDI: ffffc900009873f0 RBP: ffffc90000986ef8 R08: dffffc0000000000 R09: ffffc900009873f0 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000987400 R13: dffffc0000000000 R14: ffffc900009873f0 R15: ffffc900009873f0 FS: 0000555566c33380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001600 CR3: 000000010c42d000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_getattr+0x2a/0x320 fs/stat.c:157 ovl_copy_up_one fs/overlayfs/copy_up.c:961 [inline] ovl_copy_up_flags+0x629/0x2d30 fs/overlayfs/copy_up.c:1047 ovl_maybe_copy_up+0x15a/0x190 fs/overlayfs/copy_up.c:1079 ovl_open+0xad/0x210 fs/overlayfs/file.c:152 do_dentry_open+0x81c/0xfd0 fs/open.c:828 vfs_open fs/open.c:958 [inline] dentry_open+0xb8/0x100 fs/open.c:974 file_open+0x2a7/0x650 fs/incfs/vfs.c:1493 do_dentry_open+0x81c/0xfd0 fs/open.c:828 vfs_open+0x73/0x80 fs/open.c:958 do_open fs/namei.c:3608 [inline] path_openat+0x26f0/0x2f40 fs/namei.c:3742 do_filp_open+0x21c/0x460 fs/namei.c:3769 do_sys_openat2+0x13f/0x820 fs/open.c:1234 do_sys_open fs/open.c:1250 [inline] __do_sys_creat fs/open.c:1326 [inline] __se_sys_creat fs/open.c:1320 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1320 x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:86 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f6135685569 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe0f32dc88 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f6135685569 RDX: 00007f6135685569 RSI: 0000000000000000 RDI: 0000200000000100 RBP: 00002000000000c0 R08: 00007ffe0f32de68 R09: 00007ffe0f32de68 R10: 00007ffe0f32de68 R11: 0000000000000246 R12: 0030656c69662f2e R13: 00007ffe0f32de58 R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace 32f9e53782fdbb4f ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:562 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1347 Code: 37 ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 77 57 7a 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 5a 57 7a ff 48 8b 1b 48 83 c3 0c RSP: 0018:ffffc90000986ed0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88810cf83b40 RDX: 0000000000000000 RSI: ffffc90000987400 RDI: ffffc900009873f0 RBP: ffffc90000986ef8 R08: dffffc0000000000 R09: ffffc900009873f0 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000987400 R13: dffffc0000000000 R14: ffffc900009873f0 R15: ffffc900009873f0 FS: 0000555566c33380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001600 CR3: 000000010c42d000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- 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 77 57 7a ff call 0xff7a5792 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 5a 57 7a ff call 0xff7a5792 38: 48 8b 1b mov (%rbx),%rbx 3b: 48 83 c3 0c add $0xc,%rbx