- 06 May, 2022 9 commits
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Leon Romanovsky authored
After removal of Innova IPsec support from mlx5 driver, the last user of this XFRM_ESP_NO_TRAILER was gone too. This means that we can safely remove it as no other hardware is capable (or need) to remove ESP trailer. Reviewed-by:
Raed Salem <raeds@nvidia.com> Signed-off-by:
Leon Romanovsky <leonro@nvidia.com> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Steffen Klassert <steffen.klassert@secunet.com>
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Jakub Kicinski authored
Mat Martineau says: ==================== mptcp: Improve MPTCP-level window tracking This series improves MPTCP receive window compliance with RFC 8684 and helps increase throughput on high-speed links. Note that patch 3 makes a change in tcp_output.c For the details, Paolo says: I've been chasing bad/unstable performance with multiple subflows on very high speed links. It looks like the root cause is due to the current mptcp-level congestion window handling. There are apparently a few different sub-issues: - the rcv_wnd is not effectively shared on the tx side, as each subflow takes in account only the value received by the underlaying TCP connection. This is addressed in patch 1/5 - The mptcp-level offered wnd right edge is currently allowed to shrink. Reading section 3.3.4.: """ The receive window is relative to the DATA_ACK. As in TCP, a receiver MUST NOT shrink the right edge of the receive window (i.e., DATA_ACK + receive window). The receiver will use the data sequence number to tell if a packet should be accepted at the connection level. """ I read the above as we need to reflect window right-edge tracking on the wire, see patch 4/5. - The offered window right edge tracking can happen concurrently on multiple subflows, but there is no mutex protection. We need an additional atomic operation - still patch 4/5 This series additionally bumps a few new MIBs to track all the above (ensure/observe that the suspected races actually take place). I could not access again the host where the issue was so noticeable, still in the current setup the tput changes from [6-18] Gbps to 19Gbps very stable. ==================== Link: https://lore.kernel.org/r/20220504215408.349318-1-mathew.j.martineau@linux.intel.comSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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Paolo Abeni authored
Track the exceptional handling of MPTCP-level offered window with a few more counters for observability. Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Signed-off-by:
Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by:
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Paolo Abeni authored
As per RFC, the offered MPTCP-level window should never shrink. While we currently track the right edge, we don't enforce the above constraint on the wire. Additionally, concurrent xmit on different subflows can end-up in erroneous right edge update. Address the above explicitly updating the announced window and protecting the update with an additional atomic operation (sic) Signed-off-by:
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Paolo Abeni authored
The MPTCP RFC requires that the MPTCP-level receive window's right edge never moves backward. Currently the MPTCP code enforces such constraint while tracking the right edge, but it does not reflects it on the wire, as MPTCP lacks a suitable hook to update accordingly the TCP header. This change modifies the existing mptcp_write_options() hook, providing the current packet's TCP header to the MPTCP protocol, so that the next patch could implement the above mentioned constraint. No functional changes intended. Signed-off-by:
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Paolo Abeni authored
Bump a counter for counter when snd_wnd is shared among subflow, for observability's sake. Signed-off-by:
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Paolo Abeni authored
As per RFC, mptcp subflows use a "shared" snd_wnd: the effective window is the maximum among the current values received on all subflows. Without such feature a data transfer using multiple subflows could block. Window sharing is currently implemented in the RX side: __tcp_select_window uses the mptcp-level receive buffer to compute the announced window. That is not enough: the TCP stack will stick to the window size received on the given subflow; we need to propagate the msk window value on each subflow at xmit time. Change the packet scheduler to ignore the subflow level window and use instead the msk level one Signed-off-by:
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Andy Shevchenko authored
There is export_uuid() function which exports uuid_t to the u8 array. Use it instead of open coding variant. This allows to hide the uuid_t internals. Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220504091407.70661-1-andriy.shevchenko@linux.intel.comSigned-off-by:
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David Ahern authored
msg_zerocopy_alloc is only used by msg_zerocopy_realloc; remove the export and make static in skbuff.c Signed-off-by:
David Ahern <dsahern@kernel.org> Acked-by:
Jonathan Lemon <jonathan.lemon@gmail.com> Link: https://lore.kernel.org/r/20220504170947.18773-1-dsahern@kernel.orgSigned-off-by:
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- 05 May, 2022 31 commits
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Jakub Kicinski authored
Make the drivers with custom tx napi weight call netif_napi_add_tx_weight(). Reviewed-by:
Xuan Zhuo <xuanzhuo@linux.alibaba.com> Link: https://lore.kernel.org/r/20220504163725.550782-2-kuba@kernel.orgSigned-off-by:
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Jakub Kicinski authored
Switch net callers to the new API not requiring the NAPI_POLL_WEIGHT argument. Acked-by:
Florian Fainelli <f.fainelli@gmail.com> Reviewed-by:
Alex Elder <elder@linaro.org> Acked-by:
Alexandra Winter <wintera@linux.ibm.com> Link: https://lore.kernel.org/r/20220504163725.550782-1-kuba@kernel.orgSigned-off-by:
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Jakub Kicinski authored
Remove a define which looks like a OS abstraction layer and makes spatch conversions on this driver problematic. Link: https://lore.kernel.org/r/20220504163939.551231-1-kuba@kernel.orgSigned-off-by:
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Christophe Leroy authored
powerpc's asm/prom.h includes some headers that it doesn't need itself. In order to clean powerpc's asm/prom.h up in a further step, first clean all files that include asm/prom.h Some files don't need asm/prom.h at all. For those ones, just remove inclusion of asm/prom.h Some files don't need any of the items provided by asm/prom.h, but need some of the headers included by asm/prom.h. For those ones, add the needed headers that are brought by asm/prom.h at the moment and remove asm/prom.h Some files really need asm/prom.h but also need some of the headers included by asm/prom.h. For those one, leave asm/prom.h but also add the needed headers so that they can be removed from asm/prom.h in a later step. Signed-off-by:
Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/09a13d592d628de95d30943e59b2170af5b48110.1651663857.git.christophe.leroy@csgroup.euSigned-off-by:
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Christophe Leroy authored
powerpc's <asm/prom.h> includes some headers that it doesn't need itself. In order to clean powerpc's <asm/prom.h> up in a further step, first clean all files that include <asm/prom.h> sungem_phy.c doesn't use any object provided by <asm/prom.h>. But removing inclusion of <asm/prom.h> leads to the following errors: CC drivers/net/sungem_phy.o drivers/net/sungem_phy.c: In function 'bcm5421_init': drivers/net/sungem_phy.c:448:42: error: implicit declaration of function 'of_get_parent'; did you mean 'dget_parent'? [-Werror=implicit-function-declaration] 448 | struct device_node *np = of_get_parent(phy->platform_data); | ^~~~~~~~~~~~~ | dget_parent drivers/net/sungem_phy.c:448:42: warning: initialization of 'struct device_node *' from 'int' makes pointer from integer without a cast [-Wint-conversion] drivers/net/sungem_phy.c:450:35: error: implicit declaration of function 'of_get_property' [-Werror=implicit-function-declaration] 450 | if (np == NULL || of_get_property(np, "no-autolowpower", NULL)) | ^~~~~~~~~~~~~~~ Remove <asm/prom.h> from included headers but add <linux/of.h> to handle the above. Signed-off-by: -
Eyal Birger authored
The commit referenced in the "Fixes" tag added the SO_RCVMARK socket option for receiving the skb mark in the ancillary data. Since this is a new capability, and exposes admin configured details regarding the underlying network setup to sockets, let's align the needed capabilities with those of SO_MARK. Fixes: 6fd1d51c ("net: SO_RCVMARK socket option for SO_MARK with recvmsg()") Signed-off-by:
Eyal Birger <eyal.birger@gmail.com> Link: https://lore.kernel.org/r/20220504095459.2663513-1-eyal.birger@gmail.comSigned-off-by:
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Jakub Kicinski authored
This reverts commit 5e927a9f, reversing changes made to cfc1d91a. The discussion is still ongoing so let's remove the uAPI until the discussion settles. Link: https://lore.kernel.org/all/20220425090021.32e9a98f@kernel.org/Reviewed-by:
Ido Schimmel <idosch@nvidia.com> Link: https://lore.kernel.org/r/20220504154037.539442-1-kuba@kernel.orgSigned-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski authored
tools/testing/selftests/net/forwarding/Makefile f62c5acc ("selftests/net/forwarding: add missing tests to Makefile") 50fe062c ("selftests: forwarding: new test, verify host mdb entries") https://lore.kernel.org/all/20220502111539.0b7e4621@canb.auug.org.au/Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from Paolo Abeni: "Including fixes from can, rxrpc and wireguard. Previous releases - regressions: - igmp: respect RCU rules in ip_mc_source() and ip_mc_msfilter() - mld: respect RCU rules in ip6_mc_source() and ip6_mc_msfilter() - rds: acquire netns refcount on TCP sockets - rxrpc: enable IPv6 checksums on transport socket - nic: hinic: fix bug of wq out of bound access - nic: thunder: don't use pci_irq_vector() in atomic context - nic: bnxt_en: fix possible bnxt_open() failure caused by wrong RFS flag - nic: mlx5e: - lag, fix use-after-free in fib event handler - fix deadlock in sync reset flow Previous releases - always broken: - tcp: fix insufficient TCP source port randomness - can: grcan: grcan_close(): fix deadlock - nfc: reorder destructive operations in to avoid bugs Misc: - wireguard: improve selftests reliability" * tag 'net-5.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (63 commits) NFC: netlink: fix sleep in atomic bug when firmware download timeout selftests: ocelot: tc_flower_chains: specify conform-exceed action for policer tcp: drop the hash_32() part from the index calculation tcp: increase source port perturb table to 2^16 tcp: dynamically allocate the perturb table used by source ports tcp: add small random increments to the source port tcp: resalt the secret every 10 seconds tcp: use different parts of the port_offset for index and offset secure_seq: use the 64 bits of the siphash for port offset calculation wireguard: selftests: set panic_on_warn=1 from cmdline wireguard: selftests: bump package deps wireguard: selftests: restore support for ccache wireguard: selftests: use newer toolchains to fill out architectures wireguard: selftests: limit parallelism to $(nproc) tests at once wireguard: selftests: make routing loop test non-fatal net/mlx5: Fix matching on inner TTC net/mlx5: Avoid double clear or set of sync reset requested net/mlx5: Fix deadlock in sync reset flow net/mlx5e: Fix trust state reset in reload net/mlx5e: Avoid checking offload capability in post_parse action ... -
Casper Andersson authored
Handle adding and removing MDB entries for host Signed-off-by:
Casper Andersson <casper.casan@gmail.com> Link: https://lore.kernel.org/r/20220503093922.1630804-1-casper.casan@gmail.comSigned-off-by:
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Duoming Zhou authored
There are sleep in atomic bug that could cause kernel panic during firmware download process. The root cause is that nlmsg_new with GFP_KERNEL parameter is called in fw_dnld_timeout which is a timer handler. The call trace is shown below: BUG: sleeping function called from invalid context at include/linux/sched/mm.h:265 Call Trace: kmem_cache_alloc_node __alloc_skb nfc_genl_fw_download_done call_timer_fn __run_timers.part.0 run_timer_softirq __do_softirq ... The nlmsg_new with GFP_KERNEL parameter may sleep during memory allocation process, and the timer handler is run as the result of a "software interrupt" that should not call any other function that could sleep. This patch changes allocation mode of netlink message from GFP_KERNEL to GFP_ATOMIC in order to prevent sleep in atomic bug. The GFP_ATOMIC flag makes memory allocation operation could be used in atomic context. Fixes: 9674da87 ("NFC: Add firmware upload netlink command") Fixes: 9ea7187c ("NFC: netlink: Rename CMD_FW_UPLOAD to CMD_FW_DOWNLOAD") Signed-off-by:
Duoming Zhou <duoming@zju.edu.cn> Reviewed-by:
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220504055847.38026-1-duoming@zju.edu.cnSigned-off-by:
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Jakub Kicinski authored
Vladimir Oltean says: ==================== Ocelot VCAP cleanups This is a series of minor code cleanups brought to the Ocelot switch driver logic for VCAP filters. - don't use list_for_each_safe() in ocelot_vcap_filter_add_to_block - don't use magic numbers for OCELOT_POLICER_DISCARD ==================== Link: https://lore.kernel.org/r/20220503120150.837233-1-vladimir.oltean@nxp.comSigned-off-by:
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Vladimir Oltean authored
OCELOT_POLICER_DISCARD helps "kill dropped packets dead" since a PERMIT/DENY mask mode with a port mask of 0 isn't enough to stop the CPU port from receiving packets removed from the forwarding path. The hardcoded initialization done for it in ocelot_vcap_init() is confusing. All we need from it is to have a rate and a burst size of 0. Reuse qos_policer_conf_set() for that purpose. Signed-off-by:
Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by:
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Vladimir Oltean authored
The "port" argument is used for nothing else except printing on the error path. Print errors on behalf of the policer index, which is less confusing anyway. Signed-off-by:
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Vladimir Oltean authored
Unify the code paths for adding to an empty list and to a list with elements by keeping a "pos" list_head element that indicates where to insert. Initialize "pos" with the list head itself in case list_for_each_entry() doesn't iterate over any element. Note that list_for_each_safe() isn't needed because no element is removed from the list while iterating. Signed-off-by:
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Vladimir Oltean authored
This makes no functional difference but helps in minimizing the delta for a future change. Signed-off-by:
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Vladimir Oltean authored
list_add(..., pos->prev) and list_add_tail(..., pos) are equivalent, use the later form to unify with the case where the list is empty later. Signed-off-by:
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Michael Walle authored
In commit 4fdabd50 ("dt-bindings: net: lan966x: remove PHY reset") the PHY reset was removed, but I failed to remove it from the example. Fix it. Fixes: 4fdabd50 ("dt-bindings: net: lan966x: remove PHY reset") Reported-by:
Rob Herring <robh@kernel.org> Signed-off-by:
Michael Walle <michael@walle.cc> Acked-by:
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Vladimir Oltean authored
As discussed here with Ido Schimmel: https://patchwork.kernel.org/project/netdevbpf/patch/20220224102908.5255-2-jianbol@nvidia.com/ the default conform-exceed action is "reclassify", for a reason we don't really understand. The point is that hardware can't offload that police action, so not specifying "conform-exceed" was always wrong, even though the command used to work in hardware (but not in software) until the kernel started adding validation for it. Fix the command used by the selftest by making the policer drop on exceed, and pass the packet to the next action (goto) on conform. Fixes: 8cd6b020 ("selftests: ocelot: add some example VCAP IS1, IS2 and ES0 tc offloads") Signed-off-by:
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Jakub Kicinski authored
Willy Tarreau says: ==================== insufficient TCP source port randomness In a not-yet published paper, Moshe Kol, Amit Klein, and Yossi Gilad report being able to accurately identify a client by forcing it to emit only 40 times more connections than the number of entries in the table_perturb[] table, which is indexed by hashing the connection tuple. The current 2^8 setting allows them to perform that attack with only 10k connections, which is not hard to achieve in a few seconds. Eric, Amit and I have been working on this for a few weeks now imagining, testing and eliminating a number of approaches that Amit and his team were still able to break or that were found to be too risky or too expensive, and ended up with the simple improvements in this series that resists to the attack, doesn't degrade the performance, and preserves a reliable port selection algorithm to avoid connection failures, including the odd/even port selection preference that allows bind() to always find a port quickly even under strong connect() stress. The approach relies on several factors: - resalting the hash secret that's used to choose the table_perturb[] entry every 10 seconds to eliminate slow attacks and force the attacker to forget everything that was learned after this delay. This already eliminates most of the problem because if a client stays silent for more than 10 seconds there's no link between the previous and the next patterns, and 10s isn't yet frequent enough to cause too frequent repetition of a same port that may induce a connection failure ; - adding small random increments to the source port. Previously, a random 0 or 1 was added every 16 ports. Now a random 0 to 7 is added after each port. This means that with the default 32768-60999 range, a worst case rollover happens after 1764 connections, and an average of 3137. This doesn't stop statistical attacks but requires significantly more iterations of the same attack to confirm a guess. - increasing the table_perturb[] size from 2^8 to 2^16, which Amit says will require 2.6 million connections to be attacked with the changes above, making it pointless to get a fingerprint that will only last 10 seconds. Due to the size, the table was made dynamic. - a few minor improvements on the bits used from the hash, to eliminate some unfortunate correlations that may possibly have been exploited to design future attack models. These changes were tested under the most extreme conditions, up to 1.1 million connections per second to one and a few targets, showing no performance regression, and only 2 connection failures within 13 billion, which is less than 2^-32 and perfectly within usual values. The series is split into small reviewable changes and was already reviewed by Amit and Eric. ==================== Link: https://lore.kernel.org/r/20220502084614.24123-1-w@1wt.euSigned-off-by: -
Willy Tarreau authored
In commit 190cc824 ("tcp: change source port randomizarion at connect() time"), the table_perturb[] array was introduced and an index was taken from the port_offset via hash_32(). But it turns out that hash_32() performs a multiplication while the input here comes from the output of SipHash in secure_seq, that is well distributed enough to avoid the need for yet another hash. Suggested-by:
Amit Klein <aksecurity@gmail.com> Reviewed-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
Willy Tarreau <w@1wt.eu> Signed-off-by:
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Willy Tarreau authored
Moshe Kol, Amit Klein, and Yossi Gilad reported being able to accurately identify a client by forcing it to emit only 40 times more connections than there are entries in the table_perturb[] table. The previous two improvements consisting in resalting the secret every 10s and adding randomness to each port selection only slightly improved the situation, and the current value of 2^8 was too small as it's not very difficult to make a client emit 10k connections in less than 10 seconds. Thus we're increasing the perturb table from 2^8 to 2^16 so that the same precision now requires 2.6M connections, which is more difficult in this time frame and harder to hide as a background activity. The impact is that the table now uses 256 kB instead of 1 kB, which could mostly affect devices making frequent outgoing connections. However such components usually target a small set of destinations (load balancers, database clients, perf assessment tools), and in practice only a few entries will be visited, like before. A live test at 1 million connections per second showed no performance difference from the previous value. Reported-by:
Moshe Kol <moshe.kol@mail.huji.ac.il> Reported-by:
Yossi Gilad <yossi.gilad@mail.huji.ac.il> Reported-by:
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Willy Tarreau authored
We'll need to further increase the size of this table and it's likely that at some point its size will not be suitable anymore for a static table. Let's allocate it on boot from inet_hashinfo2_init(), which is called from tcp_init(). Cc: Moshe Kol <moshe.kol@mail.huji.ac.il> Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il> Cc: Amit Klein <aksecurity@gmail.com> Reviewed-by:
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Willy Tarreau authored
Here we're randomly adding between 0 and 7 random increments to the selected source port in order to add some noise in the source port selection that will make the next port less predictable. With the default port range of 32768-60999 this means a worst case reuse scenario of 14116/8=1764 connections between two consecutive uses of the same port, with an average of 14116/4.5=3137. This code was stressed at more than 800000 connections per second to a fixed target with all connections closed by the client using RSTs (worst condition) and only 2 connections failed among 13 billion, despite the hash being reseeded every 10 seconds, indicating a perfectly safe situation. Cc: Moshe Kol <moshe.kol@mail.huji.ac.il> Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il> Cc: Amit Klein <aksecurity@gmail.com> Reviewed-by:
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Eric Dumazet authored
In order to limit the ability for an observer to recognize the source ports sequence used to contact a set of destinations, we should periodically shuffle the secret. 10 seconds looks effective enough without causing particular issues. Cc: Moshe Kol <moshe.kol@mail.huji.ac.il> Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il> Cc: Amit Klein <aksecurity@gmail.com> Cc: Jason A. Donenfeld <Jason@zx2c4.com> Tested-by:
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Willy Tarreau authored
Amit Klein suggests that we use different parts of port_offset for the table's index and the port offset so that there is no direct relation between them. Cc: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Moshe Kol <moshe.kol@mail.huji.ac.il> Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il> Cc: Amit Klein <aksecurity@gmail.com> Reviewed-by:
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Willy Tarreau authored
SipHash replaced MD5 in secure_ipv{4,6}_port_ephemeral() via commit 7cd23e53 ("secure_seq: use SipHash in place of MD5"), but the output remained truncated to 32-bit only. In order to exploit more bits from the hash, let's make the functions return the full 64-bit of siphash_3u32(). We also make sure the port offset calculation in __inet_hash_connect() remains done on 32-bit to avoid the need for div_u64_rem() and an extra cost on 32-bit systems. Cc: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Moshe Kol <moshe.kol@mail.huji.ac.il> Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il> Cc: Amit Klein <aksecurity@gmail.com> Reviewed-by: -
Vasily Averin authored
Creating a new netdevice allocates at least ~50Kb of memory for various kernel objects, but only ~5Kb of them are accounted to memcg. As a result, creating an unlimited number of netdevice inside a memcg-limited container does not fall within memcg restrictions, consumes a significant part of the host's memory, can cause global OOM and lead to random kills of host processes. The main consumers of non-accounted memory are: ~10Kb 80+ kernfs nodes ~6Kb ipv6_add_dev() allocations 6Kb __register_sysctl_table() allocations 4Kb neigh_sysctl_register() allocations 4Kb __devinet_sysctl_register() allocations 4Kb __addrconf_sysctl_register() allocations Accounting of these objects allows to increase the share of memcg-related memory up to 60-70% (~38Kb accounted vs ~54Kb total for dummy netdevice on typical VM with default Fedora 35 kernel) and this should be enough to somehow protect the host from misuse inside container. Other related objects are quite small and may not be taken into account to minimize the expected performance degradation. It should be separately mentonied ~300 bytes of percpu allocation of struct ipstats_mib in snmp6_alloc_dev(), on huge multi-cpu nodes it can become the main consumer of memory. This patch does not enables kernfs accounting as it affects other parts of the kernel and should be discussed separately. However, even without kernfs, this patch significantly improves the current situation and allows to take into account more than half of all netdevice allocations. Signed-off-by:
Vasily Averin <vvs@openvz.org> Acked-by:
Luis Chamberlain <mcgrof@kernel.org> Link: https://lore.kernel.org/r/354a0a5f-9ec3-a25c-3215-304eab2157bc@openvz.orgSigned-off-by:
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Jakub Kicinski authored
Jason A. Donenfeld says: ==================== wireguard patches for 5.18-rc6 In working on some other problems, I wound up leaning on the WireGuard CI more than usual and uncovered a few small issues with reliability. These are fairly low key changes, since they don't impact kernel code itself. One change does stick out in particular, though, which is the "make routing loop test non-fatal" commit. I'm not thrilled about doing this, but currently [1] remains unsolved, and I'm still working on a real solution to that (hopefully for 5.19 or 5.20 if I can come up with a good idea...), so for now that test just prints a big red warning instead. [1] https://lore.kernel.org/netdev/YmszSXueTxYOC41G@zx2c4.com/ ==================== Link: https://lore.kernel.org/r/20220504202920.72908-1-Jason@zx2c4.comSigned-off-by:
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Jason A. Donenfeld authored
Rather than setting this once init is running, set panic_on_warn from the kernel command line, so that it catches splats from WireGuard initialization code and the various crypto selftests. Signed-off-by:
Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by:
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Jason A. Donenfeld authored
Use newer, more reliable package dependencies. These should hopefully reduce flakes. However, we keep the old iputils package, as it accumulated bugs after resulting in flakes on slow machines. Signed-off-by:
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