4.16-stable review patch. If anyone has any objections, please let me know.
------------------ From: Steven Rostedt (VMware) <[email protected]> commit 1e6338cfb50e244c445ad7d891b35385bd0ee757 upstream. Commit 841a915d20c7b2 ("printf: Do not have bprintf dereference pointers") would preprocess various pointers that are dereferenced in the bprintf() because the recording and printing are done at two different times. Some pointers stayed dereferenced in the ring buffer because user space could handle them (namely "%pS" and friends). Pointers that are not dereferenced should not be processed immediately but instead just saved directly. Cc: [email protected] Fixes: 841a915d20c7b2 ("printf: Do not have bprintf dereference pointers") Signed-off-by: Steven Rostedt (VMware) <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- lib/vsprintf.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -2591,6 +2591,8 @@ int vbin_printf(u32 *bin_buf, size_t siz case 's': case 'F': case 'f': + case 'x': + case 'K': save_arg(void *); break; default: @@ -2765,6 +2767,8 @@ int bstr_printf(char *buf, size_t size, case 's': case 'F': case 'f': + case 'x': + case 'K': process = true; break; default:
