The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From bcef5b7215681250c4bf8961dfe15e9e4fef97d0 Mon Sep 17 00:00:00 2001
From: Bart Van Assche bvanassche@acm.org Date: Wed, 29 May 2019 09:38:31 -0700 Subject: [PATCH] RDMA/srp: Accept again source addresses that do not have a port number
The function srp_parse_in() is used both for parsing source address specifications and for target address specifications. Target addresses must have a port number. Having to specify a port number for source addresses is inconvenient. Make sure that srp_parse_in() supports again parsing addresses with no port number.
Cc: stable@vger.kernel.org Fixes: c62adb7def71 ("IB/srp: Fix IPv6 address parsing") Signed-off-by: Bart Van Assche bvanassche@acm.org Signed-off-by: Jason Gunthorpe jgg@mellanox.com
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index be9ddcad8f28..87848faa7502 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -3481,13 +3481,14 @@ static const match_table_t srp_opt_tokens = { * @net: [in] Network namespace. * @sa: [out] Address family, IP address and port number. * @addr_port_str: [in] IP address and port number. + * @has_port: [out] Whether or not @addr_port_str includes a port number. * * Parse the following address formats: * - IPv4: <ip_address>:<port>, e.g. 1.2.3.4:5. * - IPv6: [<ipv6_address>]:<port>, e.g. [1::2:3%4]:5. */ static int srp_parse_in(struct net *net, struct sockaddr_storage *sa, - const char *addr_port_str) + const char *addr_port_str, bool *has_port) { char *addr_end, *addr = kstrdup(addr_port_str, GFP_KERNEL); char *port_str; @@ -3496,9 +3497,12 @@ static int srp_parse_in(struct net *net, struct sockaddr_storage *sa, if (!addr) return -ENOMEM; port_str = strrchr(addr, ':'); - if (!port_str) - return -EINVAL; - *port_str++ = '\0'; + if (port_str && strchr(port_str, ']')) + port_str = NULL; + if (port_str) + *port_str++ = '\0'; + if (has_port) + *has_port = port_str != NULL; ret = inet_pton_with_scope(net, AF_INET, addr, port_str, sa); if (ret && addr[0]) { addr_end = addr + strlen(addr) - 1; @@ -3520,6 +3524,7 @@ static int srp_parse_options(struct net *net, const char *buf, char *p; substring_t args[MAX_OPT_ARGS]; unsigned long long ull; + bool has_port; int opt_mask = 0; int token; int ret = -EINVAL; @@ -3618,7 +3623,8 @@ static int srp_parse_options(struct net *net, const char *buf, ret = -ENOMEM; goto out; } - ret = srp_parse_in(net, &target->rdma_cm.src.ss, p); + ret = srp_parse_in(net, &target->rdma_cm.src.ss, p, + NULL); if (ret < 0) { pr_warn("bad source parameter '%s'\n", p); kfree(p); @@ -3634,7 +3640,10 @@ static int srp_parse_options(struct net *net, const char *buf, ret = -ENOMEM; goto out; } - ret = srp_parse_in(net, &target->rdma_cm.dst.ss, p); + ret = srp_parse_in(net, &target->rdma_cm.dst.ss, p, + &has_port); + if (!has_port) + ret = -EINVAL; if (ret < 0) { pr_warn("bad dest parameter '%s'\n", p); kfree(p);