proc: alloc PATH_MAX bytes for /proc/${pid}/fd/ symlinks

It's not a standard approach that use __get_free_page() to alloc path
buffer directly.  We'd better use kmalloc and PATH_MAX.

	PAGE_SIZE is different on different archs. An unlinked file
	with very long canonical pathname will readlink differently
	because "(deleted)" eats into a buffer.	--adobriyan

[[email protected]: remove now-unneeded cast]

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Hao Lee <[email protected]>
Signed-off-by: Alexey Dobriyan <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: James Morris <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions