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: 9283 Comm: syz-executor.4 Not tainted 5.9.0-rc6-next-20200924-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:550 [inline] RIP: 0010:security_inode_getattr+0x46/0x140 security/security.c:1276 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:ffffc90006547ae0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 000000000000000d RSI: ffffffff83779c6e RDI: 0000000000000068 RBP: ffffc90006547ba8 R08: 0000000000000000 R09: ffff88807a120697 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90006547ba8 R14: 0000000000000400 R15: 0000000000000000 FS: 00007f390c5b4700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd3404bff8 CR3: 00000000a2e23000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_getattr+0x22/0x60 fs/stat.c:121 ovl_getattr+0x80a/0xd20 fs/overlayfs/inode.c:245 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x199/0x390 fs/stat.c:206 vfs_stat include/linux/fs.h:3156 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:361 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e179 Code: 3d b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 0b b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f390c5b3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000033f00 RCX: 000000000045e179 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280 RBP: 000000000118d0c8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118d09c R13: 00007ffd5ac3b43f R14: 00007f390c5b49c0 R15: 000000000118d09c Modules linked in: ---[ end trace 53e63d5364d1acfd ]--- RIP: 0010:d_backing_inode include/linux/dcache.h:550 [inline] RIP: 0010:security_inode_getattr+0x46/0x140 security/security.c:1276 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:ffffc90006547ae0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 000000000000000d RSI: ffffffff83779c6e RDI: 0000000000000068 RBP: ffffc90006547ba8 R08: 0000000000000000 R09: ffff88807a120697 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90006547ba8 R14: 0000000000000400 R15: 0000000000000000 FS: 00007f390c5b4700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001590004 CR3: 00000000a2e23000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400