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Patch "s390/qeth: fix IP removal on offline cards" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled s390/qeth: fix IP removal on offline cards to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: s390-qeth-fix-ip-removal-on-offline-cards.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> Date: Tue, 27 Feb 2018 18:58:13 +0100 Subject: s390/qeth: fix IP removal on offline cards From: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> [ Upstream commit 98d823ab1fbdcb13abc25b420f9bb71bade42056 ] If the HW is not reachable, then none of the IPs in qeth's internal table has been registered with the HW yet. So when deleting such an IP, there's no need to stage it for deregistration - just drop it from the table. This fixes the "add-delete-add" scenario on an offline card, where the the second "add" merely increments the IP's use count. But as the IP is still set to DISP_ADDR_DELETE from the previous "delete" step, l3_recover_ip() won't register it with the HW when the card goes online. Fixes: 5f78e29ceebf ("qeth: optimize IP handling in rx_mode callback") Signed-off-by: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/s390/net/qeth_l3_main.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -259,12 +259,8 @@ int qeth_l3_delete_ip(struct qeth_card * if (addr->in_progress) return -EINPROGRESS; - if (!qeth_card_hw_is_reachable(card)) { - addr->disp_flag = QETH_DISP_ADDR_DELETE; - return 0; - } - - rc = qeth_l3_deregister_addr_entry(card, addr); + if (qeth_card_hw_is_reachable(card)) + rc = qeth_l3_deregister_addr_entry(card, addr); hash_del(&addr->hnode); kfree(addr); @@ -406,11 +402,7 @@ static void qeth_l3_recover_ip(struct qe spin_lock_bh(&card->ip_lock); hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) { - if (addr->disp_flag == QETH_DISP_ADDR_DELETE) { - qeth_l3_deregister_addr_entry(card, addr); - hash_del(&addr->hnode); - kfree(addr); - } else if (addr->disp_flag == QETH_DISP_ADDR_ADD) { + if (addr->disp_flag == QETH_DISP_ADDR_ADD) { if (addr->proto == QETH_PROT_IPV4) { addr->in_progress = 1; spin_unlock_bh(&card->ip_lock); Patches currently in stable-queue which might be from jwi(a)linux.vnet.ibm.com are queue-4.9/s390-qeth-fix-setip-command-handling.patch queue-4.9/s390-qeth-fix-ip-address-lookup-for-l3-devices.patch queue-4.9/s390-qeth-fix-ipa-command-submission-race.patch queue-4.9/s390-qeth-fix-overestimated-count-of-buffer-elements.patch queue-4.9/s390-qeth-fix-double-free-on-ip-add-remove-race.patch queue-4.9/s390-qeth-fix-ip-removal-on-offline-cards.patch queue-4.9/s390-qeth-fix-underestimated-count-of-buffer-elements.patch

7 years, 6 months

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Patch "s390/qeth: fix IP address lookup for L3 devices" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled s390/qeth: fix IP address lookup for L3 devices to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: s390-qeth-fix-ip-address-lookup-for-l3-devices.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> Date: Tue, 27 Feb 2018 18:58:16 +0100 Subject: s390/qeth: fix IP address lookup for L3 devices From: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> [ Upstream commit c5c48c58b259bb8f0482398370ee539d7a12df3e ] Current code ("qeth_l3_ip_from_hash()") matches a queried address object against objects in the IP table by IP address, Mask/Prefix Length and MAC address ("qeth_l3_ipaddrs_is_equal()"). But what callers actually require is either a) "is this IP address registered" (ie. match by IP address only), before adding a new address. b) or "is this address object registered" (ie. match all relevant attributes), before deleting an address. Right now 1. the ADD path is too strict in its lookup, and eg. doesn't detect conflicts between an existing NORMAL address and a new VIPA address (because the NORMAL address will have mask != 0, while VIPA has a mask == 0), 2. the DELETE path is not strict enough, and eg. allows del_rxip() to delete a VIPA address as long as the IP address matches. Fix all this by adding helpers (_addr_match_ip() and _addr_match_all()) that do the appropriate checking. Note that the ADD path for NORMAL addresses is special, as qeth keeps track of how many times such an address is in use (and there is no immediate way of returning errors to the caller). So when a requested NORMAL address _fully_ matches an existing one, it's not considered a conflict and we merely increment the refcount. Fixes: 5f78e29ceebf ("qeth: optimize IP handling in rx_mode callback") Signed-off-by: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/s390/net/qeth_l3.h | 34 ++++++++++++++ drivers/s390/net/qeth_l3_main.c | 91 ++++++++++++++++++---------------------- 2 files changed, 74 insertions(+), 51 deletions(-) --- a/drivers/s390/net/qeth_l3.h +++ b/drivers/s390/net/qeth_l3.h @@ -39,8 +39,40 @@ struct qeth_ipaddr { unsigned int pfxlen; } a6; } u; - }; + +static inline bool qeth_l3_addr_match_ip(struct qeth_ipaddr *a1, + struct qeth_ipaddr *a2) +{ + if (a1->proto != a2->proto) + return false; + if (a1->proto == QETH_PROT_IPV6) + return ipv6_addr_equal(&a1->u.a6.addr, &a2->u.a6.addr); + return a1->u.a4.addr == a2->u.a4.addr; +} + +static inline bool qeth_l3_addr_match_all(struct qeth_ipaddr *a1, + struct qeth_ipaddr *a2) +{ + /* Assumes that the pair was obtained via qeth_l3_addr_find_by_ip(), + * so 'proto' and 'addr' match for sure. + * + * For ucast: + * - 'mac' is always 0. + * - 'mask'/'pfxlen' for RXIP/VIPA is always 0. For NORMAL, matching + * values are required to avoid mixups in takeover eligibility. + * + * For mcast, + * - 'mac' is mapped from the IP, and thus always matches. + * - 'mask'/'pfxlen' is always 0. + */ + if (a1->type != a2->type) + return false; + if (a1->proto == QETH_PROT_IPV6) + return a1->u.a6.pfxlen == a2->u.a6.pfxlen; + return a1->u.a4.mask == a2->u.a4.mask; +} + static inline u64 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr) { u64 ret = 0; --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -154,6 +154,24 @@ int qeth_l3_string_to_ipaddr(const char return -EINVAL; } +static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card, + struct qeth_ipaddr *query) +{ + u64 key = qeth_l3_ipaddr_hash(query); + struct qeth_ipaddr *addr; + + if (query->is_multicast) { + hash_for_each_possible(card->ip_mc_htable, addr, hnode, key) + if (qeth_l3_addr_match_ip(addr, query)) + return addr; + } else { + hash_for_each_possible(card->ip_htable, addr, hnode, key) + if (qeth_l3_addr_match_ip(addr, query)) + return addr; + } + return NULL; +} + static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len) { int i, j; @@ -207,34 +225,6 @@ static bool qeth_l3_is_addr_covered_by_i return rc; } -inline int -qeth_l3_ipaddrs_is_equal(struct qeth_ipaddr *addr1, struct qeth_ipaddr *addr2) -{ - return addr1->proto == addr2->proto && - !memcmp(&addr1->u, &addr2->u, sizeof(addr1->u)) && - !memcmp(&addr1->mac, &addr2->mac, sizeof(addr1->mac)); -} - -static struct qeth_ipaddr * -qeth_l3_ip_from_hash(struct qeth_card *card, struct qeth_ipaddr *tmp_addr) -{ - struct qeth_ipaddr *addr; - - if (tmp_addr->is_multicast) { - hash_for_each_possible(card->ip_mc_htable, addr, - hnode, qeth_l3_ipaddr_hash(tmp_addr)) - if (qeth_l3_ipaddrs_is_equal(tmp_addr, addr)) - return addr; - } else { - hash_for_each_possible(card->ip_htable, addr, - hnode, qeth_l3_ipaddr_hash(tmp_addr)) - if (qeth_l3_ipaddrs_is_equal(tmp_addr, addr)) - return addr; - } - - return NULL; -} - int qeth_l3_delete_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr) { int rc = 0; @@ -249,8 +239,8 @@ int qeth_l3_delete_ip(struct qeth_card * QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8); } - addr = qeth_l3_ip_from_hash(card, tmp_addr); - if (!addr) + addr = qeth_l3_find_addr_by_ip(card, tmp_addr); + if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr)) return -ENOENT; addr->ref_counter--; @@ -272,6 +262,7 @@ int qeth_l3_add_ip(struct qeth_card *car { int rc = 0; struct qeth_ipaddr *addr; + char buf[40]; QETH_CARD_TEXT(card, 4, "addip"); @@ -282,8 +273,20 @@ int qeth_l3_add_ip(struct qeth_card *car QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8); } - addr = qeth_l3_ip_from_hash(card, tmp_addr); - if (!addr) { + addr = qeth_l3_find_addr_by_ip(card, tmp_addr); + if (addr) { + if (tmp_addr->type != QETH_IP_TYPE_NORMAL) + return -EADDRINUSE; + if (qeth_l3_addr_match_all(addr, tmp_addr)) { + addr->ref_counter++; + return 0; + } + qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u, + buf); + dev_warn(&card->gdev->dev, + "Registering IP address %s failed\n", buf); + return -EADDRINUSE; + } else { addr = qeth_l3_get_addr_buffer(tmp_addr->proto); if (!addr) return -ENOMEM; @@ -331,11 +334,7 @@ int qeth_l3_add_ip(struct qeth_card *car hash_del(&addr->hnode); kfree(addr); } - } else { - if (addr->type == QETH_IP_TYPE_NORMAL) - addr->ref_counter++; } - return rc; } @@ -719,12 +718,7 @@ int qeth_l3_add_vipa(struct qeth_card *c return -ENOMEM; spin_lock_bh(&card->ip_lock); - - if (qeth_l3_ip_from_hash(card, ipaddr)) - rc = -EEXIST; - else - qeth_l3_add_ip(card, ipaddr); - + rc = qeth_l3_add_ip(card, ipaddr); spin_unlock_bh(&card->ip_lock); kfree(ipaddr); @@ -787,12 +781,7 @@ int qeth_l3_add_rxip(struct qeth_card *c return -ENOMEM; spin_lock_bh(&card->ip_lock); - - if (qeth_l3_ip_from_hash(card, ipaddr)) - rc = -EEXIST; - else - qeth_l3_add_ip(card, ipaddr); - + rc = qeth_l3_add_ip(card, ipaddr); spin_unlock_bh(&card->ip_lock); kfree(ipaddr); @@ -1437,8 +1426,9 @@ qeth_l3_add_mc_to_hash(struct qeth_card memcpy(tmp->mac, buf, sizeof(tmp->mac)); tmp->is_multicast = 1; - ipm = qeth_l3_ip_from_hash(card, tmp); + ipm = qeth_l3_find_addr_by_ip(card, tmp); if (ipm) { + /* for mcast, by-IP match means full match */ ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING; } else { ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4); @@ -1521,8 +1511,9 @@ qeth_l3_add_mc6_to_hash(struct qeth_card sizeof(struct in6_addr)); tmp->is_multicast = 1; - ipm = qeth_l3_ip_from_hash(card, tmp); + ipm = qeth_l3_find_addr_by_ip(card, tmp); if (ipm) { + /* for mcast, by-IP match means full match */ ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING; continue; } Patches currently in stable-queue which might be from jwi(a)linux.vnet.ibm.com are queue-4.9/s390-qeth-fix-setip-command-handling.patch queue-4.9/s390-qeth-fix-ip-address-lookup-for-l3-devices.patch queue-4.9/s390-qeth-fix-ipa-command-submission-race.patch queue-4.9/s390-qeth-fix-overestimated-count-of-buffer-elements.patch queue-4.9/s390-qeth-fix-double-free-on-ip-add-remove-race.patch queue-4.9/s390-qeth-fix-ip-removal-on-offline-cards.patch queue-4.9/s390-qeth-fix-underestimated-count-of-buffer-elements.patch

7 years, 6 months

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Patch "s390/qeth: fix double-free on IP add/remove race" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled s390/qeth: fix double-free on IP add/remove race to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: s390-qeth-fix-double-free-on-ip-add-remove-race.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> Date: Tue, 27 Feb 2018 18:58:14 +0100 Subject: s390/qeth: fix double-free on IP add/remove race From: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> [ Upstream commit 14d066c3531a87f727968cacd85bd95c75f59843 ] Registering an IPv4 address with the HW takes quite a while, so we temporarily drop the ip_htable lock. Any concurrent add/remove of the same IP adjusts the IP's use count, and (on remove) is then blocked by addr->in_progress. After the register call has completed, we check the use count for concurrently attempted add/remove calls - and possibly straight-away deregister the IP again. This happens via l3_delete_ip(), which 1) looks up the queried IP in the htable (getting a reference to the *same* queried object), 2) deregisters the IP from the HW, and 3) frees the IP object. The caller in l3_add_ip() then does a second free on the same object. For this case, skip all the extra checks and lookups in l3_delete_ip() and just deregister & free the IP object ourselves. Fixes: 5f78e29ceebf ("qeth: optimize IP handling in rx_mode callback") Signed-off-by: Julian Wiedmann <jwi(a)linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/s390/net/qeth_l3_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -323,7 +323,8 @@ int qeth_l3_add_ip(struct qeth_card *car (rc == IPA_RC_LAN_OFFLINE)) { addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING; if (addr->ref_counter < 1) { - qeth_l3_delete_ip(card, addr); + qeth_l3_deregister_addr_entry(card, addr); + hash_del(&addr->hnode); kfree(addr); } } else { Patches currently in stable-queue which might be from jwi(a)linux.vnet.ibm.com are queue-4.9/s390-qeth-fix-setip-command-handling.patch queue-4.9/s390-qeth-fix-ip-address-lookup-for-l3-devices.patch queue-4.9/s390-qeth-fix-ipa-command-submission-race.patch queue-4.9/s390-qeth-fix-overestimated-count-of-buffer-elements.patch queue-4.9/s390-qeth-fix-double-free-on-ip-add-remove-race.patch queue-4.9/s390-qeth-fix-ip-removal-on-offline-cards.patch queue-4.9/s390-qeth-fix-underestimated-count-of-buffer-elements.patch

7 years, 6 months

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Patch "rxrpc: Fix send in rxrpc_send_data_packet()" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled rxrpc: Fix send in rxrpc_send_data_packet() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: rxrpc-fix-send-in-rxrpc_send_data_packet.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: David Howells <dhowells(a)redhat.com> Date: Thu, 22 Feb 2018 14:38:14 +0000 Subject: rxrpc: Fix send in rxrpc_send_data_packet() From: David Howells <dhowells(a)redhat.com> [ Upstream commit 93c62c45ed5fad1b87e3a45835b251cd68de9c46 ] All the kernel_sendmsg() calls in rxrpc_send_data_packet() need to send both parts of the iov[] buffer, but one of them does not. Fix it so that it does. Without this, short IPv6 rxrpc DATA packets may be seen that have the rxrpc header included, but no payload. Fixes: 5a924b8951f8 ("rxrpc: Don't store the rxrpc header in the Tx queue sk_buffs") Reported-by: Marc Dionne <marc.dionne(a)auristor.com> Signed-off-by: David Howells <dhowells(a)redhat.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/rxrpc/output.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -391,7 +391,7 @@ send_fragmentable: (char *)&opt, sizeof(opt)); if (ret == 0) { ret = kernel_sendmsg(conn->params.local->socket, &msg, - iov, 1, iov[0].iov_len); + iov, 2, len); opt = IPV6_PMTUDISC_DO; kernel_setsockopt(conn->params.local->socket, Patches currently in stable-queue which might be from dhowells(a)redhat.com are queue-4.9/rxrpc-fix-send-in-rxrpc_send_data_packet.patch

7 years, 6 months

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Patch "ppp: prevent unregistered channels from connecting to PPP units" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled ppp: prevent unregistered channels from connecting to PPP units to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: ppp-prevent-unregistered-channels-from-connecting-to-ppp-units.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Guillaume Nault <g.nault(a)alphalink.fr> Date: Fri, 2 Mar 2018 18:41:16 +0100 Subject: ppp: prevent unregistered channels from connecting to PPP units From: Guillaume Nault <g.nault(a)alphalink.fr> [ Upstream commit 77f840e3e5f09c6d7d727e85e6e08276dd813d11 ] PPP units don't hold any reference on the channels connected to it. It is the channel's responsibility to ensure that it disconnects from its unit before being destroyed. In practice, this is ensured by ppp_unregister_channel() disconnecting the channel from the unit before dropping a reference on the channel. However, it is possible for an unregistered channel to connect to a PPP unit: register a channel with ppp_register_net_channel(), attach a /dev/ppp file to it with ioctl(PPPIOCATTCHAN), unregister the channel with ppp_unregister_channel() and finally connect the /dev/ppp file to a PPP unit with ioctl(PPPIOCCONNECT). Once in this situation, the channel is only held by the /dev/ppp file, which can be released at anytime and free the channel without letting the parent PPP unit know. Then the ppp structure ends up with dangling pointers in its ->channels list. Prevent this scenario by forbidding unregistered channels from connecting to PPP units. This maintains the code logic by keeping ppp_unregister_channel() responsible from disconnecting the channel if necessary and avoids modification on the reference counting mechanism. This issue seems to predate git history (successfully reproduced on Linux 2.6.26 and earlier PPP commits are unrelated). Signed-off-by: Guillaume Nault <g.nault(a)alphalink.fr> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/net/ppp/ppp_generic.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/net/ppp/ppp_generic.c +++ b/drivers/net/ppp/ppp_generic.c @@ -3157,6 +3157,15 @@ ppp_connect_channel(struct channel *pch, goto outl; ppp_lock(ppp); + spin_lock_bh(&pch->downl); + if (!pch->chan) { + /* Don't connect unregistered channels */ + spin_unlock_bh(&pch->downl); + ppp_unlock(ppp); + ret = -ENOTCONN; + goto outl; + } + spin_unlock_bh(&pch->downl); if (pch->file.hdrlen > ppp->file.hdrlen) ppp->file.hdrlen = pch->file.hdrlen; hdrlen = pch->file.hdrlen + 2; /* for protocol bytes */ Patches currently in stable-queue which might be from g.nault(a)alphalink.fr are queue-4.9/ppp-prevent-unregistered-channels-from-connecting-to-ppp-units.patch

7 years, 6 months

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Patch "netlink: ensure to loop over all netns in genlmsg_multicast_allns()" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled netlink: ensure to loop over all netns in genlmsg_multicast_allns() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: netlink-ensure-to-loop-over-all-netns-in-genlmsg_multicast_allns.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Nicolas Dichtel <nicolas.dichtel(a)6wind.com> Date: Tue, 6 Feb 2018 14:48:32 +0100 Subject: netlink: ensure to loop over all netns in genlmsg_multicast_allns() From: Nicolas Dichtel <nicolas.dichtel(a)6wind.com> [ Upstream commit cb9f7a9a5c96a773bbc9c70660dc600cfff82f82 ] Nowadays, nlmsg_multicast() returns only 0 or -ESRCH but this was not the case when commit 134e63756d5f was pushed. However, there was no reason to stop the loop if a netns does not have listeners. Returns -ESRCH only if there was no listeners in all netns. To avoid having the same problem in the future, I didn't take the assumption that nlmsg_multicast() returns only 0 or -ESRCH. Fixes: 134e63756d5f ("genetlink: make netns aware") CC: Johannes Berg <johannes.berg(a)intel.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel(a)6wind.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/netlink/genetlink.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -1103,6 +1103,7 @@ static int genlmsg_mcast(struct sk_buff { struct sk_buff *tmp; struct net *net, *prev = NULL; + bool delivered = false; int err; for_each_net_rcu(net) { @@ -1114,14 +1115,21 @@ static int genlmsg_mcast(struct sk_buff } err = nlmsg_multicast(prev->genl_sock, tmp, portid, group, flags); - if (err) + if (!err) + delivered = true; + else if (err != -ESRCH) goto error; } prev = net; } - return nlmsg_multicast(prev->genl_sock, skb, portid, group, flags); + err = nlmsg_multicast(prev->genl_sock, skb, portid, group, flags); + if (!err) + delivered = true; + else if (err != -ESRCH) + goto error; + return delivered ? 0 : -ESRCH; error: kfree_skb(skb); return err; Patches currently in stable-queue which might be from nicolas.dichtel(a)6wind.com are queue-4.9/netlink-ensure-to-loop-over-all-netns-in-genlmsg_multicast_allns.patch

7 years, 6 months

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Patch "net: phy: fix phy_start to consider PHY_IGNORE_INTERRUPT" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled net: phy: fix phy_start to consider PHY_IGNORE_INTERRUPT to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: net-phy-fix-phy_start-to-consider-phy_ignore_interrupt.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Heiner Kallweit <hkallweit1(a)gmail.com> Date: Thu, 8 Feb 2018 21:01:48 +0100 Subject: net: phy: fix phy_start to consider PHY_IGNORE_INTERRUPT From: Heiner Kallweit <hkallweit1(a)gmail.com> [ Upstream commit 08f5138512180a479ce6b9d23b825c9f4cd3be77 ] This condition wasn't adjusted when PHY_IGNORE_INTERRUPT (-2) was added long ago. In case of PHY_IGNORE_INTERRUPT the MAC interrupt indicates also PHY state changes and we should do what the symbol says. Fixes: 84a527a41f38 ("net: phylib: fix interrupts re-enablement in phy_start") Signed-off-by: Heiner Kallweit <hkallweit1(a)gmail.com> Reviewed-by: Florian Fainelli <f.fainelli(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/net/phy/phy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -925,7 +925,7 @@ void phy_start(struct phy_device *phydev break; case PHY_HALTED: /* make sure interrupts are re-enabled for the PHY */ - if (phydev->irq != PHY_POLL) { + if (phy_interrupt_is_valid(phydev)) { err = phy_enable_interrupts(phydev); if (err < 0) break; Patches currently in stable-queue which might be from hkallweit1(a)gmail.com are queue-4.9/net-phy-fix-phy_start-to-consider-phy_ignore_interrupt.patch

7 years, 6 months

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Patch "net: ipv4: don't allow setting net.ipv4.route.min_pmtu below 68" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled net: ipv4: don't allow setting net.ipv4.route.min_pmtu below 68 to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: net-ipv4-don-t-allow-setting-net.ipv4.route.min_pmtu-below-68.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Sabrina Dubroca <sd(a)queasysnail.net> Date: Mon, 26 Feb 2018 16:13:43 +0100 Subject: net: ipv4: don't allow setting net.ipv4.route.min_pmtu below 68 From: Sabrina Dubroca <sd(a)queasysnail.net> [ Upstream commit c7272c2f1229125f74f22dcdd59de9bbd804f1c8 ] According to RFC 1191 sections 3 and 4, ICMP frag-needed messages indicating an MTU below 68 should be rejected: A host MUST never reduce its estimate of the Path MTU below 68 octets. and (talking about ICMP frag-needed's Next-Hop MTU field): This field will never contain a value less than 68, since every router "must be able to forward a datagram of 68 octets without fragmentation". Furthermore, by letting net.ipv4.route.min_pmtu be set to negative values, we can end up with a very large PMTU when (-1) is cast into u32. Let's also make ip_rt_min_pmtu a u32, since it's only ever compared to unsigned ints. Reported-by: Jianlin Shi <jishi(a)redhat.com> Signed-off-by: Sabrina Dubroca <sd(a)queasysnail.net> Reviewed-by: Stefano Brivio <sbrivio(a)redhat.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/ipv4/route.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -126,10 +126,13 @@ static int ip_rt_redirect_silence __read static int ip_rt_error_cost __read_mostly = HZ; static int ip_rt_error_burst __read_mostly = 5 * HZ; static int ip_rt_mtu_expires __read_mostly = 10 * 60 * HZ; -static int ip_rt_min_pmtu __read_mostly = 512 + 20 + 20; +static u32 ip_rt_min_pmtu __read_mostly = 512 + 20 + 20; static int ip_rt_min_advmss __read_mostly = 256; static int ip_rt_gc_timeout __read_mostly = RT_GC_TIMEOUT; + +static int ip_min_valid_pmtu __read_mostly = IPV4_MIN_MTU; + /* * Interface to generic destination cache. */ @@ -2772,7 +2775,8 @@ static struct ctl_table ipv4_route_table .data = &ip_rt_min_pmtu, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = proc_dointvec, + .proc_handler = proc_dointvec_minmax, + .extra1 = &ip_min_valid_pmtu, }, { .procname = "min_adv_mss", Patches currently in stable-queue which might be from sd(a)queasysnail.net are queue-4.9/net-ipv4-don-t-allow-setting-net.ipv4.route.min_pmtu-below-68.patch

7 years, 6 months

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Patch "net: fix race on decreasing number of TX queues" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled net: fix race on decreasing number of TX queues to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: net-fix-race-on-decreasing-number-of-tx-queues.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Jakub Kicinski <jakub.kicinski(a)netronome.com> Date: Mon, 12 Feb 2018 21:35:31 -0800 Subject: net: fix race on decreasing number of TX queues From: Jakub Kicinski <jakub.kicinski(a)netronome.com> [ Upstream commit ac5b70198adc25c73fba28de4f78adcee8f6be0b ] netif_set_real_num_tx_queues() can be called when netdev is up. That usually happens when user requests change of number of channels/rings with ethtool -L. The procedure for changing the number of queues involves resetting the qdiscs and setting dev->num_tx_queues to the new value. When the new value is lower than the old one, extra care has to be taken to ensure ordering of accesses to the number of queues vs qdisc reset. Currently the queues are reset before new dev->num_tx_queues is assigned, leaving a window of time where packets can be enqueued onto the queues going down, leading to a likely crash in the drivers, since most drivers don't check if TX skbs are assigned to an active queue. Fixes: e6484930d7c7 ("net: allocate tx queues in register_netdevice") Signed-off-by: Jakub Kicinski <jakub.kicinski(a)netronome.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/core/dev.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2199,8 +2199,11 @@ EXPORT_SYMBOL(netif_set_xps_queue); */ int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq) { + bool disabling; int rc; + disabling = txq < dev->real_num_tx_queues; + if (txq < 1 || txq > dev->num_tx_queues) return -EINVAL; @@ -2216,15 +2219,19 @@ int netif_set_real_num_tx_queues(struct if (dev->num_tc) netif_setup_tc(dev, txq); - if (txq < dev->real_num_tx_queues) { + dev->real_num_tx_queues = txq; + + if (disabling) { + synchronize_net(); qdisc_reset_all_tx_gt(dev, txq); #ifdef CONFIG_XPS netif_reset_xps_queues_gt(dev, txq); #endif } + } else { + dev->real_num_tx_queues = txq; } - dev->real_num_tx_queues = txq; return 0; } EXPORT_SYMBOL(netif_set_real_num_tx_queues); Patches currently in stable-queue which might be from jakub.kicinski(a)netronome.com are queue-4.9/net-fix-race-on-decreasing-number-of-tx-queues.patch

7 years, 6 months

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Patch "mlxsw: spectrum_switchdev: Check success of FDB add operation" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled mlxsw: spectrum_switchdev: Check success of FDB add operation to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: mlxsw-spectrum_switchdev-check-success-of-fdb-add-operation.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Thu Mar 8 06:55:02 PST 2018 From: Shalom Toledo <shalomt(a)mellanox.com> Date: Thu, 1 Mar 2018 11:37:05 +0100 Subject: mlxsw: spectrum_switchdev: Check success of FDB add operation From: Shalom Toledo <shalomt(a)mellanox.com> [ Upstream commit 0a8a1bf17e3af34f1f8d2368916a6327f8b3bfd5 ] Until now, we assumed that in case of error when adding FDB entries, the write operation will fail, but this is not the case. Instead, we need to check that the number of entries reported in the response is equal to the number of entries specified in the request. Fixes: 56ade8fe3fe1 ("mlxsw: spectrum: Add initial support for Spectrum ASIC") Reported-by: Ido Schimmel <idosch(a)mellanox.com> Signed-off-by: Shalom Toledo <shalomt(a)mellanox.com> Reviewed-by: Ido Schimmel <idosch(a)mellanox.com> Signed-off-by: Jiri Pirko <jiri(a)mellanox.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c | 29 +++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c @@ -809,6 +809,7 @@ static int __mlxsw_sp_port_fdb_uc_op(str bool dynamic) { char *sfd_pl; + u8 num_rec; int err; sfd_pl = kmalloc(MLXSW_REG_SFD_LEN, GFP_KERNEL); @@ -818,9 +819,16 @@ static int __mlxsw_sp_port_fdb_uc_op(str mlxsw_reg_sfd_pack(sfd_pl, mlxsw_sp_sfd_op(adding), 0); mlxsw_reg_sfd_uc_pack(sfd_pl, 0, mlxsw_sp_sfd_rec_policy(dynamic), mac, fid, action, local_port); + num_rec = mlxsw_reg_sfd_num_rec_get(sfd_pl); err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfd), sfd_pl); - kfree(sfd_pl); + if (err) + goto out; + + if (num_rec != mlxsw_reg_sfd_num_rec_get(sfd_pl)) + err = -EBUSY; +out: + kfree(sfd_pl); return err; } @@ -845,6 +853,7 @@ static int mlxsw_sp_port_fdb_uc_lag_op(s bool adding, bool dynamic) { char *sfd_pl; + u8 num_rec; int err; sfd_pl = kmalloc(MLXSW_REG_SFD_LEN, GFP_KERNEL); @@ -855,9 +864,16 @@ static int mlxsw_sp_port_fdb_uc_lag_op(s mlxsw_reg_sfd_uc_lag_pack(sfd_pl, 0, mlxsw_sp_sfd_rec_policy(dynamic), mac, fid, MLXSW_REG_SFD_REC_ACTION_NOP, lag_vid, lag_id); + num_rec = mlxsw_reg_sfd_num_rec_get(sfd_pl); err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfd), sfd_pl); - kfree(sfd_pl); + if (err) + goto out; + if (num_rec != mlxsw_reg_sfd_num_rec_get(sfd_pl)) + err = -EBUSY; + +out: + kfree(sfd_pl); return err; } @@ -891,6 +907,7 @@ static int mlxsw_sp_port_mdb_op(struct m u16 fid, u16 mid, bool adding) { char *sfd_pl; + u8 num_rec; int err; sfd_pl = kmalloc(MLXSW_REG_SFD_LEN, GFP_KERNEL); @@ -900,7 +917,15 @@ static int mlxsw_sp_port_mdb_op(struct m mlxsw_reg_sfd_pack(sfd_pl, mlxsw_sp_sfd_op(adding), 0); mlxsw_reg_sfd_mc_pack(sfd_pl, 0, addr, fid, MLXSW_REG_SFD_REC_ACTION_NOP, mid); + num_rec = mlxsw_reg_sfd_num_rec_get(sfd_pl); err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfd), sfd_pl); + if (err) + goto out; + + if (num_rec != mlxsw_reg_sfd_num_rec_get(sfd_pl)) + err = -EBUSY; + +out: kfree(sfd_pl); return err; } Patches currently in stable-queue which might be from shalomt(a)mellanox.com are queue-4.9/mlxsw-spectrum_switchdev-check-success-of-fdb-add-operation.patch

7 years, 6 months

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