openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

misc: mic: Use scnprintf() for avoiding potential buffer overflow 

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200311074916.8783-1-tiwai@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2020-03-11 08:49:16 +01:00 committed by Greg Kroah-Hartman
parent f276d3ea88
commit d108b132ea
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/misc/mic/host/mic_x100.c
View File

@ -350,10 +350,10 @@ mic_x100_load_command_line(struct mic_device *mdev, const struct firmware *fw)
if (!buf)
return -ENOMEM;
len += snprintf(buf, CMDLINE_SIZE - len,
len += scnprintf(buf, CMDLINE_SIZE - len,
" mem=%dM", boot_mem);
if (mdev->cosm_dev->cmdline)
snprintf(buf + len, CMDLINE_SIZE - len, " %s",
scnprintf(buf + len, CMDLINE_SIZE - len, " %s",
mdev->cosm_dev->cmdline);
memcpy_toio(cmd_line_va, buf, strlen(buf) + 1);
kfree(buf);