general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 0 PID: 21080 Comm: syz-executor.4 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline] RIP: 0010:security_inode_getattr+0x46/0x140 security/security.c:1331 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 04 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 08 48 8d 7b 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d7 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc90002fbf638 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900120a0000 RDX: 000000000000000d RSI: ffffffff839b784e RDI: 0000000000000068 RBP: ffffc90002fbf808 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff82b2374b R11: 0000000000000000 R12: ffff88803a815be8 R13: ffffc90002fbf808 R14: 00000000000007ff R15: 0000000000000000 FS: 00007fafcb3db700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000014a53ad CR3: 0000000018dc2000 CR4: 0000000000350ef0 Call Trace: vfs_getattr+0x22/0x60 fs/stat.c:139 ovl_copy_up_one+0x133/0x1de0 fs/overlayfs/copy_up.c:884 ovl_copy_up_flags+0x150/0x1d0 fs/overlayfs/copy_up.c:966 ovl_maybe_copy_up+0x140/0x190 fs/overlayfs/copy_up.c:998 ovl_open+0xba/0x270 fs/overlayfs/file.c:149 do_dentry_open+0x4c8/0x11d0 fs/open.c:826 do_open fs/namei.c:3374 [inline] path_openat+0x1c23/0x27f0 fs/namei.c:3507 do_filp_open+0x1aa/0x400 fs/namei.c:3534 file_open_name+0x2a8/0x420 fs/open.c:1149 acct_on+0x78/0x780 kernel/acct.c:207 __do_sys_acct kernel/acct.c:286 [inline] __se_sys_acct kernel/acct.c:273 [inline] __x64_sys_acct+0xab/0x1f0 kernel/acct.c:273 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 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:00007fafcb3db188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a3 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000440 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffcdc8c757f R14: 00007fafcb3db300 R15: 0000000000022000 Modules linked in: ---[ end trace 871433d8b97977de ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline] RIP: 0010:security_inode_getattr+0x46/0x140 security/security.c:1331 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 04 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 08 48 8d 7b 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d7 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc90002fbf638 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900120a0000 RDX: 000000000000000d RSI: ffffffff839b784e RDI: 0000000000000068 RBP: ffffc90002fbf808 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff82b2374b R11: 0000000000000000 R12: ffff88803a815be8 R13: ffffc90002fbf808 R14: 00000000000007ff R15: 0000000000000000 FS: 00007fafcb3db700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000014a53ad CR3: 0000000018dc2000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 48 89 fa mov %rdi,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) b: 0f 85 04 01 00 00 jne 0x115 11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 18: fc ff df 1b: 49 8b 5d 08 mov 0x8(%r13),%rbx 1f: 48 8d 7b 68 lea 0x68(%rbx),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 d7 00 00 00 jne 0x10b 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 48 rex.W 3f: 8b .byte 0x8b