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Fix potential security vulnerability in slcan (cloned from torvalds/linux) #203

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Fix potential security vulnerability in slcan (cloned from torvalds/linux) #203

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4 changes: 1 addition & 3 deletions drivers/net/can/slcan.c
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Original file line number Diff line number Diff line change
Expand Up @@ -150,7 +150,7 @@ static void slc_bump(struct slcan *sl)
u32 tmpid;
char *cmd = sl->rbuff;

cf.can_id = 0;
memset(&cf, 0, sizeof(cf));

switch (*cmd) {
case 'r':
Expand Down Expand Up @@ -189,8 +189,6 @@ static void slc_bump(struct slcan *sl)
else
return;

*(u64 *) (&cf.data) = 0; /* clear payload */

/* RTR frames may have a dlc > 0 but they never have any data bytes */
if (!(cf.can_id & CAN_RTR_FLAG)) {
for (i = 0; i < cf.can_dlc; i++) {
Expand Down