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lpfc: fix missing zero termination in debugfs

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If you feed 32 bytes in then the kstrtoull() doesn't receive a terminated
string so will run off the end.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Alan 2016-02-15 19:11:56 +00:00 • committed by Martin K. Petersen
parent 5b2e0c1bef
commit 0872774d8a
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/lpfc/lpfc_debugfs.c
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@ -1054,11 +1054,11 @@ lpfc_debugfs_dif_err_write(struct file *file, const char __user *buf,
{ {
struct dentry *dent = file->f_path.dentry; struct dentry *dent = file->f_path.dentry;
struct lpfc_hba *phba = file->private_data; struct lpfc_hba *phba = file->private_data;
char dstbuf[32]; char dstbuf[33];
uint64_t tmp = 0; uint64_t tmp = 0;
int size; int size;
memset(dstbuf, 0, 32); memset(dstbuf, 0, 33);
size = (nbytes < 32) ? nbytes : 32; size = (nbytes < 32) ? nbytes : 32;
if (copy_from_user(dstbuf, buf, size)) if (copy_from_user(dstbuf, buf, size))
return 0; return 0;