KVM: x86: Emulate MSR_IA32_ARCH_CAPABILITIES on AMD hosts

[mirror_ubuntu-bionic-kernel.git] / fs / inode.c

diff --git a/fs/inode.c b/fs/inode.c
index 5c1138e9cac060ade60b613efb8ad1826b29ec84..7de7df08fe48422c726a39d761cbc399ad35d4eb 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -177,6 +177,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
        mapping->a_ops = &empty_aops;
        mapping->host = inode;
        mapping->flags = 0;
+       mapping->wb_err = 0;
        atomic_set(&mapping->i_mmap_writable, 0);
        mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
        mapping->private_data = NULL;
@@ -2008,8 +2009,14 @@ void inode_init_owner(struct inode *inode, const struct inode *dir,
        inode->i_uid = current_fsuid();
        if (dir && dir->i_mode & S_ISGID) {
                inode->i_gid = dir->i_gid;
+
+               /* Directories are special, and always inherit S_ISGID */
                if (S_ISDIR(mode))
                        mode |= S_ISGID;
+               else if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP) &&
+                        !in_group_p(inode->i_gid) &&
+                        !capable_wrt_inode_uidgid(dir, CAP_FSETID))
+                       mode &= ~S_ISGID;
        } else
                inode->i_gid = current_fsgid();
        inode->i_mode = mode;