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: 480 Comm: syz.2.16 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:d_backing_inode include/linux/dcache.h:558 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1265 Code: 4e ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 67 a3 88 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 4a a3 88 ff 4d 8b 36 49 83 c6 0c RSP: 0018:ffffc9000440f150 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffffc9000440f4d0 RCX: ffff888116864f00 RDX: 0000000000000000 RSI: ffffc9000440f4e0 RDI: ffffc9000440f4d0 RBP: ffffc9000440f178 R08: dffffc0000000000 R09: ffffc9000440f4d0 R10: 0000000000000000 R11: 0000000000000020 R12: ffffc9000440f4d0 R13: dffffc0000000000 R14: 0000000000000030 R15: ffffc9000440f4e0 FS: 00007ffb08a666c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000117348000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_getattr+0x25/0x70 fs/stat.c:129 ovl_copy_up_one fs/overlayfs/copy_up.c:882 [inline] ovl_copy_up_flags+0x3da/0x1930 fs/overlayfs/copy_up.c:964 ovl_maybe_copy_up+0x160/0x190 fs/overlayfs/copy_up.c:996 ovl_open+0x9d/0x1f0 fs/overlayfs/file.c:151 do_dentry_open+0x793/0x1090 fs/open.c:819 vfs_open fs/open.c:942 [inline] dentry_open+0xbb/0x100 fs/open.c:958 file_open+0x298/0x630 fs/incfs/vfs.c:1478 do_dentry_open+0x793/0x1090 fs/open.c:819 vfs_open+0x73/0x80 fs/open.c:942 do_open fs/namei.c:3391 [inline] path_openat+0x27ad/0x3160 fs/namei.c:3509 do_filp_open+0x1b3/0x3e0 fs/namei.c:3536 do_sys_openat2+0x14c/0x6d0 fs/open.c:1217 do_sys_open fs/open.c:1233 [inline] __do_sys_openat fs/open.c:1249 [inline] __se_sys_openat fs/open.c:1244 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1244 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ffb08fecd29 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:00007ffb08a66038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffb091dcfa0 RCX: 00007ffb08fecd29 RDX: 0000000000000002 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007ffb09068b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffb091dcfa0 R15: 00007ffdfead7168 Modules linked in: ---[ end trace a2662bd56a873810 ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:558 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1265 Code: 4e ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 67 a3 88 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 4a a3 88 ff 4d 8b 36 49 83 c6 0c RSP: 0018:ffffc9000440f150 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffffc9000440f4d0 RCX: ffff888116864f00 RDX: 0000000000000000 RSI: ffffc9000440f4e0 RDI: ffffc9000440f4d0 RBP: ffffc9000440f178 R08: dffffc0000000000 R09: ffffc9000440f4d0 R10: 0000000000000000 R11: 0000000000000020 R12: ffffc9000440f4d0 R13: dffffc0000000000 R14: 0000000000000030 R15: ffffc9000440f4e0 FS: 00007ffb08a666c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000117348000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4e ff 4c 8d 73 rex.WRX decq 0x73(%rbp,%r9,4) 5: 08 4c 89 f0 or %cl,-0x10(%rcx,%rcx,4) 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 67 a3 88 ff call 0xff88a383 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 4a a3 88 ff call 0xff88a383 39: 4d 8b 36 mov (%r14),%r14 3c: 49 83 c6 0c add $0xc,%r14