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: 348 Comm: syz-executor.0 Not tainted 6.1.145-syzkaller-1169987-gc750dc582629 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline] RIP: 0010:security_inode_getattr+0x47/0x140 security/security.c:1359 Code: 3b ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 97 59 80 ff 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 7a 59 80 ff 4d 8b 36 49 83 c6 0c RSP: 0018:ffffc90001457040 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffffc90001457410 RCX: ffff888107ddbcc0 RDX: 0000000000000000 RSI: ffffc90001457420 RDI: ffffc90001457410 RBP: ffffc90001457068 R08: dffffc0000000000 R09: ffffc90001457410 R10: 0000000000000000 R11: 0000000000000028 R12: ffffc90001457410 R13: dffffc0000000000 R14: 0000000000000030 R15: 0000000000048002 FS: 00007ffb10b4c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000123cb8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_getattr+0x29/0x310 fs/stat.c:158 ovl_copy_up_one fs/overlayfs/copy_up.c:974 [inline] ovl_copy_up_flags+0x3c8/0x24b0 fs/overlayfs/copy_up.c:1060 ovl_maybe_copy_up+0x160/0x190 fs/overlayfs/copy_up.c:1092 ovl_open+0xf7/0x2e0 fs/overlayfs/file.c:155 do_dentry_open+0x88e/0x1260 fs/open.c:884 vfs_open fs/open.c:1015 [inline] dentry_open+0xbb/0x100 fs/open.c:1031 file_open+0x298/0x630 fs/incfs/vfs.c:1501 do_dentry_open+0x88e/0x1260 fs/open.c:884 vfs_open+0x73/0x80 fs/open.c:1015 do_open fs/namei.c:3625 [inline] path_openat+0x2681/0x2f50 fs/namei.c:3782 do_filp_open+0x1c1/0x3c0 fs/namei.c:3809 do_sys_openat2+0x185/0x7e0 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+0x136/0x160 fs/open.c:1368 x64_sys_call+0x783/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ffb0fe7dda9 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:00007ffb10b4c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffb0ffabf80 RCX: 00007ffb0fe7dda9 RDX: 0000000000000002 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007ffb0feca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ffb0ffabf80 R15: 00007ffd488b23b8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline] RIP: 0010:security_inode_getattr+0x47/0x140 security/security.c:1359 Code: 3b ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 97 59 80 ff 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 7a 59 80 ff 4d 8b 36 49 83 c6 0c RSP: 0018:ffffc90001457040 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffffc90001457410 RCX: ffff888107ddbcc0 RDX: 0000000000000000 RSI: ffffc90001457420 RDI: ffffc90001457410 RBP: ffffc90001457068 R08: dffffc0000000000 R09: ffffc90001457410 R10: 0000000000000000 R11: 0000000000000028 R12: ffffc90001457410 R13: dffffc0000000000 R14: 0000000000000030 R15: 0000000000048002 FS: 00007ffb10b4c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000123cb8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 3b ff cmp %edi,%edi 2: 4c 8d 73 08 lea 0x8(%rbx),%r14 6: 4c 89 f0 mov %r14,%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: 4c 89 f7 mov %r14,%rdi 17: e8 97 59 80 ff call 0xff8059b3 1c: 4d 8b 36 mov (%r14),%r14 1f: 49 83 c6 30 add $0x30,%r14 23: 4c 89 f0 mov %r14,%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: 4c 89 f7 mov %r14,%rdi 34: e8 7a 59 80 ff call 0xff8059b3 39: 4d 8b 36 mov (%r14),%r14 3c: 49 83 c6 0c add $0xc,%r14