From: James Smart jsmart2021@gmail.com
[ Upstream commit f8191d40aa612981ce897e66cda6a88db8df17bb ]
Malformed user input to debugfs results in buffer overflow crashes. Adapt input string lengths to fit within internal buffers, leaving space for NULL terminators.
Link: https://lore.kernel.org/r/20220701211425.2708-3-jsmart2021@gmail.com Co-developed-by: Justin Tee justin.tee@broadcom.com Signed-off-by: Justin Tee justin.tee@broadcom.com Signed-off-by: James Smart jsmart2021@gmail.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/lpfc/lpfc_debugfs.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c index 7b24c932e812..25deacc92b02 100644 --- a/drivers/scsi/lpfc/lpfc_debugfs.c +++ b/drivers/scsi/lpfc/lpfc_debugfs.c @@ -2607,8 +2607,8 @@ lpfc_debugfs_multixripools_write(struct file *file, const char __user *buf, struct lpfc_sli4_hdw_queue *qp; struct lpfc_multixri_pool *multixri_pool;
- if (nbytes > 64) - nbytes = 64; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1;
memset(mybuf, 0, sizeof(mybuf));
@@ -2688,8 +2688,8 @@ lpfc_debugfs_nvmestat_write(struct file *file, const char __user *buf, if (!phba->targetport) return -ENXIO;
- if (nbytes > 64) - nbytes = 64; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1;
memset(mybuf, 0, sizeof(mybuf));
@@ -2826,8 +2826,8 @@ lpfc_debugfs_ioktime_write(struct file *file, const char __user *buf, char mybuf[64]; char *pbuf;
- if (nbytes > 64) - nbytes = 64; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1;
memset(mybuf, 0, sizeof(mybuf));
@@ -2954,8 +2954,8 @@ lpfc_debugfs_nvmeio_trc_write(struct file *file, const char __user *buf, char mybuf[64]; char *pbuf;
- if (nbytes > 63) - nbytes = 63; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1;
memset(mybuf, 0, sizeof(mybuf));
@@ -3060,8 +3060,8 @@ lpfc_debugfs_hdwqstat_write(struct file *file, const char __user *buf, char *pbuf; int i;
- if (nbytes > 64) - nbytes = 64; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1;
memset(mybuf, 0, sizeof(mybuf));