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: 288 Comm: syz-executor218 Not tainted 5.15.189-syzkaller-00079-ga71626bd56a5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:d_backing_inode include/linux/dcache.h:562 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1347 Code: 48 ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 67 a8 86 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 a8 86 ff 4d 8b 36 49 83 c6 0c RSP: 0018:ffffc900009970e0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffffc900009974d0 RCX: ffff8881063ccf00 RDX: 0000000000000000 RSI: ffffc900009974e0 RDI: ffffc900009974d0 RBP: ffffc90000997108 R08: dffffc0000000000 R09: ffffc900009974d0 R10: 0000000000000000 R11: 0000000000000020 R12: ffffc900009974d0 R13: dffffc0000000000 R14: 0000000000000030 R15: ffffc90000997480 FS: 000055558857c480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001258e7000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_getattr+0x29/0x310 fs/stat.c:157 ovl_copy_up_one fs/overlayfs/copy_up.c:965 [inline] ovl_copy_up_flags+0x3d9/0x1b20 fs/overlayfs/copy_up.c:1051 ovl_maybe_copy_up+0x160/0x190 fs/overlayfs/copy_up.c:1083 ovl_open+0x9d/0x1f0 fs/overlayfs/file.c:152 do_dentry_open+0x834/0x1010 fs/open.c:828 vfs_open fs/open.c:958 [inline] dentry_open+0xbb/0x100 fs/open.c:974 file_open+0x298/0x630 fs/incfs/vfs.c:1493 do_dentry_open+0x834/0x1010 fs/open.c:828 vfs_open+0x73/0x80 fs/open.c:958 do_open fs/namei.c:3608 [inline] path_openat+0x2646/0x2f10 fs/namei.c:3742 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769 do_sys_openat2+0x14c/0x7b0 fs/open.c:1234 do_sys_open fs/open.c:1250 [inline] __do_sys_openat fs/open.c:1266 [inline] __se_sys_openat fs/open.c:1261 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1261 x64_sys_call+0x219/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f85a8e7e159 Code: 48 83 c4 28 c3 e8 67 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:00007fffe592a7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0073662d6c61746e RCX: 00007f85a8e7e159 RDX: 0000000000000002 RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007fffe592a808 R08: 00007f85a8e4b150 R09: 00007f85a8e4b150 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffe592aa68 R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace d97d5beb8d62745c ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:562 [inline] RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1347 Code: 48 ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 67 a8 86 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 a8 86 ff 4d 8b 36 49 83 c6 0c RSP: 0018:ffffc900009970e0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffffc900009974d0 RCX: ffff8881063ccf00 RDX: 0000000000000000 RSI: ffffc900009974e0 RDI: ffffc900009974d0 RBP: ffffc90000997108 R08: dffffc0000000000 R09: ffffc900009974d0 R10: 0000000000000000 R11: 0000000000000020 R12: ffffc900009974d0 R13: dffffc0000000000 R14: 0000000000000030 R15: ffffc90000997480 FS: 000055558857c480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001258e7000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 ff 4c 8d 73 decq 0x73(%rbp,%rcx,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 a8 86 ff call 0xff86a883 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 a8 86 ff call 0xff86a883 39: 4d 8b 36 mov (%r14),%r14 3c: 49 83 c6 0c add $0xc,%r14