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aaf473d010
If optval != NULL and optlen == 0 are specified for SO_J1939_FILTER in
j1939_sk_setsockopt(), memdup_sockptr() will return ZERO_PTR for 0
size allocation. The new filter will be mistakenly assigned ZERO_PTR.
This patch checks for optlen != 0 and filter will be assigned NULL in
case of optlen == 0.
Fixes:
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.. | ||
j1939 | ||
af_can.c | ||
af_can.h | ||
bcm.c | ||
gw.c | ||
isotp.c | ||
Kconfig | ||
Makefile | ||
proc.c | ||
raw.c |