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[PATCH] v9fs: replace strlen on newly allocated by __getname buffers to PATH_MAX
v9fs_vfs_readlink allocates space for the link using __getname and errorneously uses strlen on the newly allocated buffer to check if the buffer passed by the user is bigger than the one returned by __getname. The patch replaces the strlen usage to PATH_MAX, which is the actual size of the buffers returned by __getname. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Cc: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -1063,8 +1063,8 @@ static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
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int ret;
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char *link = __getname();
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if (strlen(link) < buflen)
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buflen = strlen(link);
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if (buflen > PATH_MAX)
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buflen = PATH_MAX;
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dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
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