[PATCH] fs/elf: Fix kernel pointer leak

Guo Zhi
2021-09-29T13:17:41Z

Pointers should be printed with %p rather than %px
which printed kernel pointer directly.
Change %px to %p to print the secured pointer.

Signed-off-by: Guo Zhi <qtxuning1999@sjtu.edu.cn>
---
fs/binfmt_elf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index f3523807dbca..440a483656ed 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -393,7 +393,7 @@ static unsigned long elf_map(struct file *filep, unsigned long addr,

if ((type & MAP_FIXED_NOREPLACE) &&
PTR_ERR((void *)map_addr) == -EEXIST)
- pr_info("%d (%s): Uhuuh, elf segment at %px requested but the memory is mapped already\n",
+ pr_info("%d (%s): Uhuuh, elf segment at %p requested but the memory is mapped already\n",
task_pid_nr(current), current->comm, (void *)addr);

return(map_addr);
--
2.33.0