lib/vsprintf: no_hash_pointers prints all addresses as unhashed

If the no_hash_pointers command line parameter is set, then
printk("%p") will print pointers as unhashed, which is useful for
debugging purposes.  This change applies to any function that uses
vsprintf, such as print_hex_dump() and seq_buf_printf().

A large warning message is displayed if this option is enabled.
Unhashed pointers expose kernel addresses, which can be a security
risk.

Also update test_printf to skip the hashed pointer tests if the
command-line option is set.

Signed-off-by: Timur Tabi <[email protected]>
Acked-by: Petr Mladek <[email protected]>
Acked-by: Randy Dunlap <[email protected]>
Acked-by: Sergey Senozhatsky <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Acked-by: Marco Elver <[email protected]>
Signed-off-by: Petr Mladek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

0 files changed, 0 insertions, 0 deletions