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b12e924a2f
syzbot is hitting skb_assert_len() warning at __dev_queue_xmit() [1],
for PF_IEEE802154 socket's zero-sized raw_sendmsg() request is hitting
__dev_queue_xmit() with skb->len == 0.
Since PF_IEEE802154 socket's zero-sized raw_sendmsg() request was
able to return 0, don't call __dev_queue_xmit() if packet length is 0.
----------
#include <sys/socket.h>
#include <netinet/in.h>
int main(int argc, char *argv[])
{
struct sockaddr_in addr = { .sin_family = AF_INET, .sin_addr.s_addr = htonl(INADDR_LOOPBACK) };
struct iovec iov = { };
struct msghdr hdr = { .msg_name = &addr, .msg_namelen = sizeof(addr), .msg_iov = &iov, .msg_iovlen = 1 };
sendmsg(socket(PF_IEEE802154, SOCK_RAW, 0), &hdr, 0);
return 0;
}
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Note that this might be a sign that commit
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|---|---|---|
| .. | ||
| 6lowpan | ||
| core.c | ||
| core.h | ||
| header_ops.c | ||
| ieee802154.h | ||
| Kconfig | ||
| Makefile | ||
| netlink.c | ||
| nl802154.c | ||
| nl802154.h | ||
| nl_policy.c | ||
| nl-mac.c | ||
| nl-phy.c | ||
| rdev-ops.h | ||
| socket.c | ||
| sysfs.c | ||
| sysfs.h | ||
| trace.c | ||
| trace.h | ||