[lkml]   [2018]   [Feb]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH] floppy: Don't print kernel addresses to log in show_floppy
Outputting kernel addresses will reveal the locations of kernel code
and data. Change the cases in show_floppy that print and to use the %pf format
specifier, which will print the symbol name, like what is done for the
other function pointers printed by show_floppy. No longer output the
value of cont. The variable cont is a pointer that can hold the
address of kernel global variables.

Signed-off-by: Brian Belleville <>
drivers/block/floppy.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index eae484a..e29d417 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -1819,15 +1819,14 @@ static void show_floppy(void)
if (work_pending(&floppy_work))
pr_info("floppy_work.func=%pf\n", floppy_work.func);
if (delayed_work_pending(&fd_timer))
- pr_info("delayed work.function=%p expires=%ld\n",
+ pr_info("delayed work.function=%pf expires=%ld\n",,
fd_timer.timer.expires - jiffies);
if (delayed_work_pending(&fd_timeout))
- pr_info("timer_function=%p expires=%ld\n",
+ pr_info("timer_function=%pf expires=%ld\n",,
fd_timeout.timer.expires - jiffies);

- pr_info("cont=%p\n", cont);
pr_info("current_req=%p\n", current_req);
pr_info("command_status=%d\n", command_status);
 \ /
  Last update: 2018-02-20 23:55    [W:0.057 / U:0.364 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site