4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@xxxxxxxxx>
commit 4bd173c30792791a6daca8c64793ec0a4ae8324f upstream.
Do the user_len check first and then the ver_addr allocation so that we
can save us the kfree() on the error path when user_len is >
ARCMSR_API_DATA_BUFLEN.
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Marco Grassi <marco.gra@xxxxxxxxx>
Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Cc: Tomas Henzl <thenzl@xxxxxxxxxx>
Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/arcmsr/arcmsr_hba.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -2300,18 +2300,20 @@ static int arcmsr_iop_message_xfer(struc
uint32_t user_len;
int32_t cnt2end;
uint8_t *pQbuffer, *ptmpuserbuffer;
- ver_addr = kmalloc(ARCMSR_API_DATA_BUFLEN, GFP_ATOMIC);
- if (!ver_addr) {
+
+ user_len = pcmdmessagefld->cmdmessage.Length;
+ if (user_len > ARCMSR_API_DATA_BUFLEN) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
- ptmpuserbuffer = ver_addr;
- user_len = pcmdmessagefld->cmdmessage.Length;
- if (user_len > ARCMSR_API_DATA_BUFLEN) {
+
+ ver_addr = kmalloc(ARCMSR_API_DATA_BUFLEN, GFP_ATOMIC);
+ if (!ver_addr) {
retvalue = ARCMSR_MESSAGE_FAIL;
- kfree(ver_addr);
goto message_out;
}
+ ptmpuserbuffer = ver_addr;
+
memcpy(ptmpuserbuffer,
pcmdmessagefld->messagedatabuffer, user_len);
spin_lock_irqsave(&acb->wqbuffer_lock, flags);
--
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