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Revert "printk: return -EINVAL if the message len is bigger than the buf size"

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This reverts commit b56a39ac26.

A better patch from Jan will follow this to resolve the issue.

Acked-by: Kay Sievers <kay@vrfy.org>
Cc: Fengguang Wu <wfg@linux.intel.com>
Cc: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Cc: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2012-06-26 12:35:24 -07:00
parent 4661e3568a
commit 6fda135c90
1 changed files with 1 additions and 3 deletions
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4
kernel/printk.c
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@ -880,9 +880,7 @@ static int syslog_print(char __user *buf, int size)
syslog_seq++; syslog_seq++;
raw_spin_unlock_irq(&logbuf_lock); raw_spin_unlock_irq(&logbuf_lock);
if (len > size) if (len > 0 && copy_to_user(buf, text, len))
len = -EINVAL;
else if (len > 0 && copy_to_user(buf, text, len))
len = -EFAULT; len = -EFAULT;
kfree(text); kfree(text);