On Thu, 26 Apr 2018 22:48:24 -0400 Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > On Fri, 27 Apr 2018 11:39:51 +0900 > Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote: > > > On Thu, 26 Apr 2018 21:13:51 -0400 > > Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > > > > > On Thu, 26 Apr 2018 17:10:03 +0900 > > > Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote: > > > > > > > Replace %p with appropriate pointer types (or just remove it) > > > > - Use %pS if possible > > > > - Use %px only for the function right before BUG(). > > > > - Remove unneeded error message. > > > > > > I'm not sure "right before BUG()" is legitimate for using %px. Why not > > > still use %pS? > > > > Since BUG() will dump all registers and stacks which includes > > raw address information and reboot the system (means reset the > > kaslr base offset), I thought it may not add additional damage. > > BUG() has been changed to print out %pS and not the address while doing > the stack dump. It only prints the address if it doesn't find a > function name. For example: > > CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.11.0-rc3-test+ #48 > Hardware name: MSI MS-7823/CSM-H87M-G43 (MS-7823), BIOS V1.6 02/22/2014 > Call Trace: > dump_stack+0x68/0x92 > lockdep_rcu_suspicious+0xf7/0x100 > rcu_read_lock+0x5f/0x61 > __is_insn_slot_addr+0x23/0x5c > __kernel_text_address+0x4a/0x80 > show_trace_log_lvl+0x157/0x296 > ? module_assert_mutex_or_preempt+0x4f/0x51 > show_stack+0x3d/0x3f > dump_stack+0x68/0x92 > __warn+0xc2/0xdd > ? 0xffffffffa0026077 > warn_slowpath_null+0x1d/0x1f > module_assert_mutex_or_preempt+0x4f/0x51 > __module_address+0x2a/0xac > ? 0xffffffffa0026077 > __module_text_address+0x12/0x59 > ? 0xffffffffa0026077 > is_module_text_address+0xe/0x16 > __kernel_text_address+0x2b/0x80 > ? 0xffffffffa0026077 > unwind_get_return_address+0x50/0x5c > Ah... OK, I'll fix that. > > > > > Anyway, for this patch we can use %pS. For the next [5/7] patch, > > I'm not sure %pS is good for dumping a stack address... > > Although it now is. Got it. Thank you! -- Masami Hiramatsu <mhiramat@xxxxxxxxxx>
