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: 5243 Comm: syz-executor.5 Not tainted 6.4.0-rc1-syzkaller-g9a48d6046722 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 RIP: 0010:d_backing_inode include/linux/dcache.h:543 [inline] RIP: 0010:security_inode_getattr+0x46/0x120 security/security.c:2112 Code: 9c fd 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f8 d3 f3 fd 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 db d3 f3 fd 48 8b 6d 00 48 83 c5 RSP: 0018:ffffc9000578f980 EFLAGS: 00010202 RAX: 000000000000000d RBX: ffffc9000578fa68 RCX: ffff88802ca90000 RDX: 0000000000000000 RSI: ffffc9000578fb60 RDI: ffffc9000578fa60 RBP: 0000000000000068 R08: dffffc0000000000 R09: 0000000000000000 R10: ffffc9000578fa60 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffc9000578fa60 FS: 00007f11db87b700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000078555000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_getattr+0x25/0x70 fs/stat.c:167 ovl_getattr+0x339/0xee0 fs/overlayfs/inode.c:248 vfs_getattr fs/stat.c:170 [inline] vfs_statx+0x1c1/0x480 fs/stat.c:242 vfs_fstatat fs/stat.c:276 [inline] vfs_stat include/linux/fs.h:2886 [inline] __do_sys_newstat fs/stat.c:419 [inline] __se_sys_newstat fs/stat.c:415 [inline] __x64_sys_newstat+0xf8/0x180 fs/stat.c:415 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x465109 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f11db87b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 000000000055cfa0 RCX: 0000000000465109 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00000000004af711 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055cfa0 R13: 00007ffceecbc9ef R14: 00007f11db87b300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:543 [inline] RIP: 0010:security_inode_getattr+0x46/0x120 security/security.c:2112 Code: 9c fd 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f8 d3 f3 fd 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 db d3 f3 fd 48 8b 6d 00 48 83 c5 RSP: 0018:ffffc9000578f980 EFLAGS: 00010202 RAX: 000000000000000d RBX: ffffc9000578fa68 RCX: ffff88802ca90000 RDX: 0000000000000000 RSI: ffffc9000578fb60 RDI: ffffc9000578fa60 RBP: 0000000000000068 R08: dffffc0000000000 R09: 0000000000000000 R10: ffffc9000578fa60 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffc9000578fa60 FS: 00007f11db87b700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000033d6848 CR3: 0000000078555000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 9c pushfq 1: fd std 2: 49 8d 5f 08 lea 0x8(%r15),%rbx 6: 48 89 d8 mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 f8 d3 f3 fd callq 0xfdf3d414 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 db d3 f3 fd callq 0xfdf3d414 39: 48 8b 6d 00 mov 0x0(%rbp),%rbp 3d: 48 rex.W 3e: 83 .byte 0x83 3f: c5 .byte 0xc5