general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 1 PID: 8394 Comm: syz-executor.3 Not tainted 5.15.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline] RIP: 0010:security_inode_getattr+0x42/0x120 security/security.c:1346 Code: be fd 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 dc 89 08 fe 48 8b 2b 48 83 c5 68 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 ef e8 bf 89 08 fe 48 8b 6d 00 48 83 c5 RSP: 0018:ffffc90002e8f200 EFLAGS: 00010202 RAX: 000000000000000d RBX: ffffc90002e8f678 RCX: ffff88801b24bb80 RDX: 0000000000000000 RSI: ffffc90002e8f680 RDI: ffffc90002e8f670 RBP: 0000000000000068 R08: dffffc0000000000 R09: ffffc90002e8f670 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffc90002e8f680 R14: 0000000000000000 R15: ffffc90002e8f670 FS: 00007f65f3e846c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002006c030 CR3: 0000000056724000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_getattr+0x26/0x360 fs/stat.c:157 ovl_copy_up_one fs/overlayfs/copy_up.c:961 [inline] ovl_copy_up_flags+0x5e7/0x2e00 fs/overlayfs/copy_up.c:1047 ovl_maybe_copy_up+0x14e/0x180 fs/overlayfs/copy_up.c:1079 ovl_open+0xa4/0x200 fs/overlayfs/file.c:149 do_dentry_open+0x807/0xfb0 fs/open.c:826 do_open fs/namei.c:3538 [inline] path_openat+0x2702/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 file_open_name+0x242/0x2a0 fs/open.c:1156 acct_on kernel/acct.c:207 [inline] __do_sys_acct kernel/acct.c:286 [inline] __se_sys_acct+0x10d/0x710 kernel/acct.c:273 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f65f5986ae9 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:00007f65f3e840c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a3 RAX: ffffffffffffffda RBX: 00007f65f5aa62c0 RCX: 00007f65f5986ae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f65f59d247a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f65f5aa62c0 R15: 00007ffc02dbdcf8 Modules linked in: ---[ end trace 9c150ab9bae3ad11 ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline] RIP: 0010:security_inode_getattr+0x42/0x120 security/security.c:1346 Code: be fd 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 dc 89 08 fe 48 8b 2b 48 83 c5 68 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 ef e8 bf 89 08 fe 48 8b 6d 00 48 83 c5 RSP: 0018:ffffc90002e8f200 EFLAGS: 00010202 RAX: 000000000000000d RBX: ffffc90002e8f678 RCX: ffff88801b24bb80 RDX: 0000000000000000 RSI: ffffc90002e8f680 RDI: ffffc90002e8f670 RBP: 0000000000000068 R08: dffffc0000000000 R09: ffffc90002e8f670 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffc90002e8f680 R14: 0000000000000000 R15: ffffc90002e8f670 FS: 00007f65f3e846c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002012c030 CR3: 0000000056724000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: be fd 49 8d 5f mov $0x5f8d49fd,%esi 5: 08 48 89 or %cl,-0x77(%rax) 8: d8 48 c1 fmuls -0x3f(%rax) b: e8 03 42 80 3c call 0x3c804213 10: 20 00 and %al,(%rax) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 dc 89 08 fe call 0xfe0889f8 1c: 48 8b 2b mov (%rbx),%rbp 1f: 48 83 c5 68 add $0x68,%rbp 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 ef mov %rbp,%rdi 34: e8 bf 89 08 fe call 0xfe0889f8 39: 48 8b 6d 00 mov 0x0(%rbp),%rbp 3d: 48 rex.W 3e: 83 .byte 0x83 3f: c5 .byte 0xc5