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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-07 17:27:45 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-07 17:27:45 -0700 |
commit | af7b4801030c07637840191c69eb666917e4135d (patch) | |
tree | d4238c6c1fe6c06112f766ae5a90afde53644f78 /net/netlink | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next (diff) | |
parent | net: dsa: lantiq_gswip: fix and improve the unsupported interface error (diff) | |
download | wireguard-linux-af7b4801030c07637840191c69eb666917e4135d.tar.xz wireguard-linux-af7b4801030c07637840191c69eb666917e4135d.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from David Miller:
- Fix the build with certain Kconfig combinations for the Chelsio
inline TLS device, from Rohit Maheshwar and Vinay Kumar Yadavi.
- Fix leak in genetlink, from Cong Lang.
- Fix out of bounds packet header accesses in seg6, from Ahmed
Abdelsalam.
- Two XDP fixes in the ENA driver, from Sameeh Jubran
- Use rwsem in device rename instead of a seqcount because this code
can sleep, from Ahmed S. Darwish.
- Fix WoL regressions in r8169, from Heiner Kallweit.
- Fix qed crashes in kdump mode, from Alok Prasad.
- Fix the callbacks used for certain thermal zones in mlxsw, from Vadim
Pasternak.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (35 commits)
net: dsa: lantiq_gswip: fix and improve the unsupported interface error
mlxsw: core: Use different get_trend() callbacks for different thermal zones
net: dp83869: Reset return variable if PHY strap is read
rhashtable: Drop raw RCU deref in nested_table_free
cxgb4: Use kfree() instead kvfree() where appropriate
net: qed: fixes crash while running driver in kdump kernel
vsock/vmci: make vmci_vsock_transport_cb() static
net: ethtool: Fix comment mentioning typo in IS_ENABLED()
net: phy: mscc: fix Serdes configuration in vsc8584_config_init
net: mscc: Fix OF_MDIO config check
net: marvell: Fix OF_MDIO config check
net: dp83867: Fix OF_MDIO config check
net: dp83869: Fix OF_MDIO config check
net: ethernet: mvneta: fix MVNETA_SKB_HEADROOM alignment
ethtool: linkinfo: remove an unnecessary NULL check
net/xdp: use shift instead of 64 bit division
crypto/chtls:Fix compile error when CONFIG_IPV6 is disabled
inet_connection_sock: clear inet_num out of destroy helper
yam: fix possible memory leak in yam_init_driver
lan743x: Use correct MAC_CR configuration for 1 GBit speed
...
Diffstat (limited to 'net/netlink')
-rw-r--r-- | net/netlink/genetlink.c | 94 |
1 files changed, 58 insertions, 36 deletions
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index 2f049692e012..6c19b91bbb86 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -513,15 +513,58 @@ static void genl_family_rcv_msg_attrs_free(const struct genl_family *family, kfree(attrbuf); } -static int genl_lock_start(struct netlink_callback *cb) +struct genl_start_context { + const struct genl_family *family; + struct nlmsghdr *nlh; + struct netlink_ext_ack *extack; + const struct genl_ops *ops; + int hdrlen; +}; + +static int genl_start(struct netlink_callback *cb) { - const struct genl_ops *ops = genl_dumpit_info(cb)->ops; + struct genl_start_context *ctx = cb->data; + const struct genl_ops *ops = ctx->ops; + struct genl_dumpit_info *info; + struct nlattr **attrs = NULL; int rc = 0; + if (ops->validate & GENL_DONT_VALIDATE_DUMP) + goto no_attrs; + + if (ctx->nlh->nlmsg_len < nlmsg_msg_size(ctx->hdrlen)) + return -EINVAL; + + attrs = genl_family_rcv_msg_attrs_parse(ctx->family, ctx->nlh, ctx->extack, + ops, ctx->hdrlen, + GENL_DONT_VALIDATE_DUMP_STRICT, + true); + if (IS_ERR(attrs)) + return PTR_ERR(attrs); + +no_attrs: + info = genl_dumpit_info_alloc(); + if (!info) { + kfree(attrs); + return -ENOMEM; + } + info->family = ctx->family; + info->ops = ops; + info->attrs = attrs; + + cb->data = info; if (ops->start) { - genl_lock(); + if (!ctx->family->parallel_ops) + genl_lock(); rc = ops->start(cb); - genl_unlock(); + if (!ctx->family->parallel_ops) + genl_unlock(); + } + + if (rc) { + kfree(attrs); + genl_dumpit_info_free(info); + cb->data = NULL; } return rc; } @@ -548,7 +591,7 @@ static int genl_lock_done(struct netlink_callback *cb) rc = ops->done(cb); genl_unlock(); } - genl_family_rcv_msg_attrs_free(info->family, info->attrs, true); + genl_family_rcv_msg_attrs_free(info->family, info->attrs, false); genl_dumpit_info_free(info); return rc; } @@ -573,43 +616,23 @@ static int genl_family_rcv_msg_dumpit(const struct genl_family *family, const struct genl_ops *ops, int hdrlen, struct net *net) { - struct genl_dumpit_info *info; - struct nlattr **attrs = NULL; + struct genl_start_context ctx; int err; if (!ops->dumpit) return -EOPNOTSUPP; - if (ops->validate & GENL_DONT_VALIDATE_DUMP) - goto no_attrs; - - if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) - return -EINVAL; - - attrs = genl_family_rcv_msg_attrs_parse(family, nlh, extack, - ops, hdrlen, - GENL_DONT_VALIDATE_DUMP_STRICT, - true); - if (IS_ERR(attrs)) - return PTR_ERR(attrs); - -no_attrs: - /* Allocate dumpit info. It is going to be freed by done() callback. */ - info = genl_dumpit_info_alloc(); - if (!info) { - genl_family_rcv_msg_attrs_free(family, attrs, true); - return -ENOMEM; - } - - info->family = family; - info->ops = ops; - info->attrs = attrs; + ctx.family = family; + ctx.nlh = nlh; + ctx.extack = extack; + ctx.ops = ops; + ctx.hdrlen = hdrlen; if (!family->parallel_ops) { struct netlink_dump_control c = { .module = family->module, - .data = info, - .start = genl_lock_start, + .data = &ctx, + .start = genl_start, .dump = genl_lock_dumpit, .done = genl_lock_done, }; @@ -617,12 +640,11 @@ no_attrs: genl_unlock(); err = __netlink_dump_start(net->genl_sock, skb, nlh, &c); genl_lock(); - } else { struct netlink_dump_control c = { .module = family->module, - .data = info, - .start = ops->start, + .data = &ctx, + .start = genl_start, .dump = ops->dumpit, .done = genl_parallel_done, }; |