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2022-03-21net/tls: optimize judgement processes in tls_set_device_offload()Ziyang Xuan1-31/+31
It is known that priority setting HW offload when set tls TX/RX offload by setsockopt(). Check netdevice whether support NETIF_F_HW_TLS_TX or not at the later stages in the whole tls_set_device_offload() process, some memory allocations have been done before that. We must release those memory and return error if we judge the netdevice not support NETIF_F_HW_TLS_TX. It is redundant. Move NETIF_F_HW_TLS_TX judgement forward, and move start_marker_record and offload_ctx memory allocation back slightly. Thus, we can get simpler exception handling process. Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-03-21net/tls: remove unnecessary jump instructions in do_tls_setsockopt_conf()Ziyang Xuan1-10/+5
Avoid using "goto" jump instruction unconditionally when we can return directly. Remove unnecessary jump instructions in do_tls_setsockopt_conf(). Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-04tls: cap the output scatter list to something reasonableJakub Kicinski1-1/+2
TLS recvmsg() passes user pages as destination for decrypt. The decrypt operation is repeated record by record, each record being 16kB, max. TLS allocates an sg_table and uses iov_iter_get_pages() to populate it with enough pages to fit the decrypted record. Even though we decrypt a single message at a time we size the sg_table based on the entire length of the iovec. This leads to unnecessarily large allocations, risking triggering OOM conditions. Use iov_iter_truncate() / iov_iter_reexpand() to construct a "capped" version of iov_iter_npages(). Alternatively we could parametrize iov_iter_npages() to take the size as arg instead of using i->count, or do something else.. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-01-17net/tls: Fix another skb memory leak when running kTLS trafficGal Pressman1-0/+1
This patch is a followup to commit ffef737fd037 ("net/tls: Fix skb memory leak when running kTLS traffic") Which was missing another sk_defer_free_flush() call in tls_sw_splice_read(). Fixes: f35f821935d8 ("tcp: defer skb freeing after socket lock is released") Signed-off-by: Gal Pressman <gal@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-01-07net/tls: Fix skb memory leak when running kTLS trafficGal Pressman1-0/+1
The cited Fixes commit introduced a memory leak when running kTLS traffic (with/without hardware offloads). I'm running nginx on the server side and wrk on the client side and get the following: unreferenced object 0xffff8881935e9b80 (size 224): comm "softirq", pid 0, jiffies 4294903611 (age 43.204s) hex dump (first 32 bytes): 80 9b d0 36 81 88 ff ff 00 00 00 00 00 00 00 00 ...6............ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000efe2a999>] build_skb+0x1f/0x170 [<00000000ef521785>] mlx5e_skb_from_cqe_mpwrq_linear+0x2bc/0x610 [mlx5_core] [<00000000945d0ffe>] mlx5e_handle_rx_cqe_mpwrq+0x264/0x9e0 [mlx5_core] [<00000000cb675b06>] mlx5e_poll_rx_cq+0x3ad/0x17a0 [mlx5_core] [<0000000018aac6a9>] mlx5e_napi_poll+0x28c/0x1b60 [mlx5_core] [<000000001f3369d1>] __napi_poll+0x9f/0x560 [<00000000cfa11f72>] net_rx_action+0x357/0xa60 [<000000008653b8d7>] __do_softirq+0x282/0x94e [<00000000644923c6>] __irq_exit_rcu+0x11f/0x170 [<00000000d4085f8f>] irq_exit_rcu+0xa/0x20 [<00000000d412fef4>] common_interrupt+0x7d/0xa0 [<00000000bfb0cebc>] asm_common_interrupt+0x1e/0x40 [<00000000d80d0890>] default_idle+0x53/0x70 [<00000000f2b9780e>] default_idle_call+0x8c/0xd0 [<00000000c7659e15>] do_idle+0x394/0x450 I'm not familiar with these areas of the code, but I've added this sk_defer_free_flush() to tls_sw_recvmsg() based on a hunch and it resolved the issue. Fixes: f35f821935d8 ("tcp: defer skb freeing after socket lock is released") Signed-off-by: Gal Pressman <gal@nvidia.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://lore.kernel.org/r/20220102081253.9123-1-gal@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-12-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-2/+2
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-11-30net/tls: simplify the tls_set_sw_offload functionTianjia Zhang1-19/+17
Assigning crypto_info variables in advance can simplify the logic of accessing value and move related local variables to a smaller scope. Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-11-29net/tls: Fix authentication failure in CCM modeTianjia Zhang1-2/+2
When the TLS cipher suite uses CCM mode, including AES CCM and SM4 CCM, the first byte of the B0 block is flags, and the real IV starts from the second byte. The XOR operation of the IV and rec_seq should be skip this byte, that is, add the iv_offset. Fixes: f295b3ae9f59 ("net/tls: Add support of AES128-CCM based ciphers") Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> Cc: Vakul Garg <vakul.garg@nxp.com> Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: David S. Miller <davem@davemloft.net>
2021-11-25tls: fix replacing proto_opsJakub Kicinski1-7/+40
We replace proto_ops whenever TLS is configured for RX. But our replacement also overrides sendpage_locked, which will crash unless TX is also configured. Similarly we plug both of those in for TLS_HW (NIC crypto offload) even tho TLS_HW has a completely different implementation for TX. Last but not least we always plug in something based on inet_stream_ops even though a few of the callbacks differ for IPv6 (getname, release, bind). Use a callback building method similar to what we do for struct proto. Fixes: c46234ebb4d1 ("tls: RX path for ktls") Fixes: d4ffb02dee2f ("net/tls: enable sk_msg redirect to tls socket egress") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-11-25tls: splice_read: fix accessing pre-processed recordsJakub Kicinski1-8/+25
recvmsg() will put peek()ed and partially read records onto the rx_list. splice_read() needs to consult that list otherwise it may miss data. Align with recvmsg() and also put partially-read records onto rx_list. tls_sw_advance_skb() is pretty pointless now and will be removed in net-next. Fixes: 692d7b5d1f91 ("tls: Fix recvmsg() to be able to peek across multiple records") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-11-25tls: splice_read: fix record type checkJakub Kicinski1-13/+10
We don't support splicing control records. TLS 1.3 changes moved the record type check into the decrypt if(). The skb may already be decrypted and still be an alert. Note that decrypt_skb_update() is idempotent and updates ctx->decrypted so the if() is pointless. Reorder the check for decryption errors with the content type check while touching them. This part is not really a bug, because if decryption failed in TLS 1.3 content type will be DATA, and for TLS 1.2 it will be correct. Nevertheless its strange to touch output before checking if the function has failed. Fixes: fedf201e1296 ("net: tls: Refactor control message handling on recv") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-10-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2-8/+17
include/net/sock.h 7b50ecfcc6cd ("net: Rename ->stream_memory_read to ->sock_is_readable") 4c1e34c0dbff ("vsock: Enable y2038 safe timeval for timeout") drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c 0daa55d033b0 ("octeontx2-af: cn10k: debugfs for dumping LMTST map table") e77bcdd1f639 ("octeontx2-af: Display all enabled PF VF rsrc_alloc entries.") Adjacent code addition in both cases, keep both. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-10-28net/tls: Fix flipped sign in async_wait.err assignmentDaniel Jordan1-1/+1
sk->sk_err contains a positive number, yet async_wait.err wants the opposite. Fix the missed sign flip, which Jakub caught by inspection. Fixes: a42055e8d2c3 ("net/tls: Add support for async encryption of records for performance") Suggested-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-28net/tls: Fix flipped sign in tls_err_abort() callsDaniel Jordan1-4/+13
sk->sk_err appears to expect a positive value, a convention that ktls doesn't always follow and that leads to memory corruption in other code. For instance, [kworker] tls_encrypt_done(..., err=<negative error from crypto request>) tls_err_abort(.., err) sk->sk_err = err; [task] splice_from_pipe_feed ... tls_sw_do_sendpage if (sk->sk_err) { ret = -sk->sk_err; // ret is positive splice_from_pipe_feed (continued) ret = actor(...) // ret is still positive and interpreted as bytes // written, resulting in underflow of buf->len and // sd->len, leading to huge buf->offset and bogus // addresses computed in later calls to actor() Fix all tls_err_abort() callers to pass a negative error code consistently and centralize the error-prone sign flip there, throwing in a warning to catch future misuse and uninlining the function so it really does only warn once. Cc: stable@vger.kernel.org Fixes: c46234ebb4d1e ("tls: RX path for ktls") Reported-by: syzbot+b187b77c8474f9648fae@syzkaller.appspotmail.com Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-26net: Rename ->stream_memory_read to ->sock_is_readableCong Wang2-3/+3
The proto ops ->stream_memory_read() is currently only used by TCP to check whether psock queue is empty or not. We need to rename it before reusing it for non-TCP protocols, and adjust the exsiting users accordingly. Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211008203306.37525-2-xiyou.wangcong@gmail.com
2021-10-25net/tls: getsockopt supports complete algorithm listTianjia Zhang1-0/+42
AES_CCM_128 and CHACHA20_POLY1305 are already supported by tls, similar to setsockopt, getsockopt also needs to support these two algorithms. Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-28net/tls: support SM4 CCM algorithmTianjia Zhang1-4/+16
The IV of CCM mode has special requirements, this patch supports CCM mode of SM4 algorithm. Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-16net/tls: support SM4 GCM/CCM algorithmTianjia Zhang2-0/+80
The RFC8998 specification defines the use of the ShangMi algorithm cipher suites in TLS 1.3, and also supports the GCM/CCM mode using the SM4 algorithm. Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> Acked-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-1/+1
Trivial conflict in net/netfilter/nf_tables_api.c. Duplicate fix in tools/testing/selftests/net/devlink_port_split.py - take the net-next version. skmsg, and L4 bpf - keep the bpf code but remove the flags and err params. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-06-21tls: prevent oversized sendfile() hangs by ignoring MSG_MOREJakub Kicinski1-1/+1
We got multiple reports that multi_chunk_sendfile test case from tls selftest fails. This was sort of expected, as the original fix was never applied (see it in the first Link:). The test in question uses sendfile() with count larger than the size of the underlying file. This will make splice set MSG_MORE on all sendpage calls, meaning TLS will never close and flush the last partial record. Eric seem to have addressed a similar problem in commit 35f9c09fe9c7 ("tcp: tcp_sendpages() should call tcp_push() once") by introducing MSG_SENDPAGE_NOTLAST. Unlike MSG_MORE MSG_SENDPAGE_NOTLAST is not set on the last call of a "pipefull" of data (PIPE_DEF_BUFFERS == 16, so every 16 pages or whenever we run out of data). Having a break every 16 pages should be fine, TLS can pack exactly 4 pages into a record, so for aligned reads there should be no difference, unaligned may see one extra record per sendpage(). Sticking to TCP semantics seems preferable to modifying splice, but we can revisit it if real life scenarios show a regression. Reported-by: Vadim Fedorenko <vfedorenko@novek.ru> Reported-by: Seth Forshee <seth.forshee@canonical.com> Link: https://lore.kernel.org/netdev/1591392508-14592-1-git-send-email-pooja.trivedi@stackpath.com/ Fixes: 3c4d7559159b ("tls: kernel TLS support") Signed-off-by: Jakub Kicinski <kuba@kernel.org> Tested-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-07skbuff: add a parameter to __skb_frag_unrefMatteo Croce1-1/+1
This is a prerequisite patch, the next one is enabling recycling of skbs and fragments. Add an extra argument on __skb_frag_unref() to handle recycling, and update the current users of the function with that. Signed-off-by: Matteo Croce <mcroce@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-07Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/netDavid S. Miller3-11/+57
Bug fixes overlapping feature additions and refactoring, mostly. Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-01net/tls: Fix use-after-free after the TLS device goes down and upMaxim Mikityanskiy3-5/+55
When a netdev with active TLS offload goes down, tls_device_down is called to stop the offload and tear down the TLS context. However, the socket stays alive, and it still points to the TLS context, which is now deallocated. If a netdev goes up, while the connection is still active, and the data flow resumes after a number of TCP retransmissions, it will lead to a use-after-free of the TLS context. This commit addresses this bug by keeping the context alive until its normal destruction, and implements the necessary fallbacks, so that the connection can resume in software (non-offloaded) kTLS mode. On the TX side tls_sw_fallback is used to encrypt all packets. The RX side already has all the necessary fallbacks, because receiving non-decrypted packets is supported. The thing needed on the RX side is to block resync requests, which are normally produced after receiving non-decrypted packets. The necessary synchronization is implemented for a graceful teardown: first the fallbacks are deployed, then the driver resources are released (it used to be possible to have a tls_dev_resync after tls_dev_del). A new flag called TLS_RX_DEV_DEGRADED is added to indicate the fallback mode. It's used to skip the RX resync logic completely, as it becomes useless, and some objects may be released (for example, resync_async, which is allocated and freed by the driver). Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure") Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com> Reviewed-by: Tariq Toukan <tariqt@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-01net/tls: Replace TLS_RX_SYNC_RUNNING with RCUMaxim Mikityanskiy1-7/+3
RCU synchronization is guaranteed to finish in finite time, unlike a busy loop that polls a flag. This patch is a preparation for the bugfix in the next patch, where the same synchronize_net() call will also be used to sync with the TX datapath. Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com> Reviewed-by: Tariq Toukan <tariqt@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-05-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-5/+6
cdc-wdm: s/kill_urbs/poison_urbs/ to fix build Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-05-14tls splice: check SPLICE_F_NONBLOCK instead of MSG_DONTWAITJim Ma1-5/+6
In tls_sw_splice_read, checkout MSG_* is inappropriate, should use SPLICE_*, update tls_wait_data to accept nonblock arguments instead of flags for recvmsg and splice. Fixes: c46234ebb4d1 ("tls: RX path for ktls") Signed-off-by: Jim Ma <majinjing3@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-05-12tls splice: remove inappropriate flags checking for MSG_PEEKJim Ma1-2/+1
In function tls_sw_splice_read, before call tls_sw_advance_skb it checks likely(!(flags & MSG_PEEK)), while MSG_PEEK is used for recvmsg, splice supports SPLICE_F_NONBLOCK, SPLICE_F_MOVE, SPLICE_F_MORE, should remove this checking. Signed-off-by: Jim Ma <majinjing3@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-27net/tls: Remove redundant initialization of recordJiapeng Chong1-1/+1
record is being initialized to ctx->open_record but this is never read as record is overwritten later on. Remove the redundant initialization. Cleans up the following clang-analyzer warning: net/tls/tls_device.c:421:26: warning: Value stored to 'record' during its initialization is never read [clang-analyzer-deadcode.DeadStores]. Reported-by: Abaci Robot <abaci@linux.alibaba.com> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-01skmsg: Extract __tcp_bpf_recvmsg() and tcp_bpf_wait_data()Cong Wang1-2/+2
Although these two functions are only used by TCP, they are not specific to TCP at all, both operate on skmsg and ingress_msg, so fit in net/core/skmsg.c very well. And we will need them for non-TCP, so rename and move them to skmsg.c and export them to modules. Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210331023237.41094-13-xiyou.wangcong@gmail.com
2021-03-24net/tls: Fix a typo in tls_device.cWang Hai1-1/+1
s/beggining/beginning/ Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wang Hai <wanghai38@huawei.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-11net/tls: Select SOCK_RX_QUEUE_MAPPING from TLS_DEVICETariq Toukan1-0/+1
Compile-in the socket RX queue mapping field and logic when TLS_DEVICE is enabled. This allows device drivers to pick the recorded socket's RX queue and use it for streams distribution. Signed-off-by: Tariq Toukan <tariqt@nvidia.com> Reviewed-by: Maxim Mikityanskiy <maximmi@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-01-18net/tls: Except bond interface from some TLS checksTariq Toukan2-1/+3
In the tls_dev_event handler, ignore tlsdev_ops requirement for bond interfaces, they do not exist as the interaction is done directly with the lower device. Also, make the validate function pass when it's called with the upper bond interface. Signed-off-by: Tariq Toukan <tariqt@nvidia.com> Reviewed-by: Boris Pismenny <borisp@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-18net/tls: Device offload to use lowest netdevice in chainTariq Toukan1-1/+1
Do not call the tls_dev_ops of upper devices. Instead, ask them for the proper lowest device and communicate with it directly. Signed-off-by: Tariq Toukan <tariqt@nvidia.com> Reviewed-by: Boris Pismenny <borisp@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-14net: fix proc_fs init handling in af_packet and tlsYonatan Linik1-0/+3
proc_fs was used, in af_packet, without a surrounding #ifdef, although there is no hard dependency on proc_fs. That caused the initialization of the af_packet module to fail when CONFIG_PROC_FS=n. Specifically, proc_create_net() was used in af_packet.c, and when it fails, packet_net_init() returns -ENOMEM. It will always fail when the kernel is compiled without proc_fs, because, proc_create_net() for example always returns NULL. The calling order that starts in af_packet.c is as follows: packet_init() register_pernet_subsys() register_pernet_operations() __register_pernet_operations() ops_init() ops->init() (packet_net_ops.init=packet_net_init()) proc_create_net() It worked in the past because register_pernet_subsys()'s return value wasn't checked before this Commit 36096f2f4fa0 ("packet: Fix error path in packet_init."). It always returned an error, but was not checked before, so everything was working even when CONFIG_PROC_FS=n. The fix here is simply to add the necessary #ifdef. This also fixes a similar error in tls_proc.c, that was found by Jakub Kicinski. Fixes: d26b698dd3cd ("net/tls: add skeleton of MIB statistics") Fixes: 36096f2f4fa0 ("packet: Fix error path in packet_init") Signed-off-by: Yonatan Linik <yonatanlinik@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-01net/tls: make sure tls offload sets salt_sizeRohit Maheshwari1-1/+3
Recent changes made to remove AES constants started using protocol aware salt_size. ctx->prot_info's salt_size is filled in tls sw case, but not in tls offload mode, and was working so far because of the hard coded value was used. Fixes: 6942a284fb3e ("net/tls: make inline helpers protocol-aware") Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com> Link: https://lore.kernel.org/r/20201201090752.27355-1-rohitm@chelsio.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2-1/+10
Trivial conflict in CAN, keep the net-next + the byteswap wrapper. Conflicts: drivers/net/can/usb/gs_usb.c Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-27net/tls: add CHACHA20-POLY1305 configurationVadim Fedorenko2-0/+19
Add ChaCha-Poly specific configuration code. Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-27net/tls: add CHACHA20-POLY1305 specific behaviorVadim Fedorenko1-2/+4
RFC 7905 defines special behavior for ChaCha-Poly TLS sessions. The differences are in the calculation of nonce and the absence of explicit IV. This behavior is like TLSv1.3 partly. Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-27net/tls: make inline helpers protocol-awareVadim Fedorenko3-14/+13
Inline functions defined in tls.h have a lot of AES-specific constants. Remove these constants and change argument to struct tls_prot_info to have an access to cipher type in later patches Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-25net/tls: Protect from calling tls_dev_del for TLS RX twiceMaxim Mikityanskiy1-1/+4
tls_device_offload_cleanup_rx doesn't clear tls_ctx->netdev after calling tls_dev_del if TLX TX offload is also enabled. Clearing tls_ctx->netdev gets postponed until tls_device_gc_task. It leaves a time frame when tls_device_down may get called and call tls_dev_del for RX one extra time, confusing the driver, which may lead to a crash. This patch corrects this racy behavior by adding a flag to prevent tls_device_down from calling tls_dev_del the second time. Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure") Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com> Link: https://lore.kernel.org/r/20201125221810.69870-1-saeedm@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-20net/tls: missing received data after fast remote closeVadim Fedorenko1-0/+6
In case when tcp socket received FIN after some data and the parser haven't started before reading data caller will receive an empty buffer. This behavior differs from plain TCP socket and leads to special treating in user-space. The flow that triggers the race is simple. Server sends small amount of data right after the connection is configured to use TLS and closes the connection. In this case receiver sees TLS Handshake data, configures TLS socket right after Change Cipher Spec record. While the configuration is in process, TCP socket receives small Application Data record, Encrypted Alert record and FIN packet. So the TCP socket changes sk_shutdown to RCV_SHUTDOWN and sk_flag with SK_DONE bit set. The received data is not parsed upon arrival and is never sent to user-space. Patch unpauses parser directly if we have unparsed data in tcp receive queue. Fixes: fcf4793e278e ("tls: check RCV_SHUTDOWN in tls_wait_data") Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru> Link: https://lore.kernel.org/r/1605801588-12236-1-git-send-email-vfedorenko@novek.ru Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-17net/tls: Fix wrong record sn in async mode of device resyncTariq Toukan1-10/+27
In async_resync mode, we log the TCP seq of records until the async request is completed. Later, in case one of the logged seqs matches the resync request, we return it, together with its record serial number. Before this fix, we mistakenly returned the serial number of the current record instead. Fixes: ed9b7646b06a ("net/tls: Add asynchronous resync") Signed-off-by: Tariq Toukan <tariqt@nvidia.com> Reviewed-by: Boris Pismenny <borisp@nvidia.com> Link: https://lore.kernel.org/r/20201115131448.2702-1-tariqt@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16net/tls: fix corrupted data in recvmsgVadim Fedorenko1-1/+1
If tcp socket has more data than Encrypted Handshake Message then tls_sw_recvmsg will try to decrypt next record instead of returning full control message to userspace as mentioned in comment. The next message - usually Application Data - gets corrupted because it uses zero copy for decryption that's why the data is not stored in skb for next iteration. Revert check to not decrypt next record if current is not Application Data. Fixes: 692d7b5d1f91 ("tls: Fix recvmsg() to be able to peek across multiple records") Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru> Link: https://lore.kernel.org/r/1605413760-21153-1-git-send-email-vfedorenko@novek.ru Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-10-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-5/+6
Minor conflicts in net/mptcp/protocol.h and tools/testing/selftests/net/Makefile. In both cases code was added on both sides in the same place so just keep both. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-10-13net/tls: use semicolons rather than commas to separate statementsJulia Lawall1-1/+1
Replace commas with semicolons. Commas introduce unnecessary variability in the code structure and are hard to see. What is done is essentially described by the following Coccinelle semantic patch (http://coccinelle.lip6.fr/): // <smpl> @@ expression e1,e2; @@ e1 -, +; e2 ... when any // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Link: https://lore.kernel.org/r/1602412498-32025-6-git-send-email-Julia.Lawall@inria.fr Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-10-09net/tls: sendfile fails with ktls offloadRohit Maheshwari1-5/+6
At first when sendpage gets called, if there is more data, 'more' in tls_push_data() gets set which later sets pending_open_record_frags, but when there is no more data in file left, and last time tls_push_data() gets called, pending_open_record_frags doesn't get reset. And later when 2 bytes of encrypted alert comes as sendmsg, it first checks for pending_open_record_frags, and since this is set, it creates a record with 0 data bytes to encrypt, meaning record length is prepend_size + tag_size only, which causes problem. We should set/reset pending_open_record_frags based on more bit. Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure") Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-10-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller1-2/+7
Rejecting non-native endian BTF overlapped with the addition of support for it. The rest were more simple overlapping changes, except the renesas ravb binding update, which had to follow a file move as well as a YAML conversion. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24net/tls: race causes kernel panicRohit Maheshwari1-2/+7
BUG: kernel NULL pointer dereference, address: 00000000000000b8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 80000008b6fef067 P4D 80000008b6fef067 PUD 8b6fe6067 PMD 0 Oops: 0000 [#1] SMP PTI CPU: 12 PID: 23871 Comm: kworker/12:80 Kdump: loaded Tainted: G S 5.9.0-rc3+ #1 Hardware name: Supermicro X10SRA-F/X10SRA-F, BIOS 2.1 03/29/2018 Workqueue: events tx_work_handler [tls] RIP: 0010:tx_work_handler+0x1b/0x70 [tls] Code: dc fe ff ff e8 16 d4 a3 f6 66 0f 1f 44 00 00 0f 1f 44 00 00 55 53 48 8b 6f 58 48 8b bd a0 04 00 00 48 85 ff 74 1c 48 8b 47 28 <48> 8b 90 b8 00 00 00 83 e2 02 75 0c f0 48 0f ba b0 b8 00 00 00 00 RSP: 0018:ffffa44ace61fe88 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff91da9e45cc30 RCX: dead000000000122 RDX: 0000000000000001 RSI: ffff91da9e45cc38 RDI: ffff91d95efac200 RBP: ffff91da133fd780 R08: 0000000000000000 R09: 000073746e657665 R10: 8080808080808080 R11: 0000000000000000 R12: ffff91dad7d30700 R13: ffff91dab6561080 R14: 0ffff91dad7d3070 R15: ffff91da9e45cc38 FS: 0000000000000000(0000) GS:ffff91dad7d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000b8 CR3: 0000000906478003 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: process_one_work+0x1a7/0x370 worker_thread+0x30/0x370 ? process_one_work+0x370/0x370 kthread+0x114/0x130 ? kthread_park+0x80/0x80 ret_from_fork+0x22/0x30 tls_sw_release_resources_tx() waits for encrypt_pending, which can have race, so we need similar changes as in commit 0cada33241d9de205522e3858b18e506ca5cce2c here as well. Fixes: a42055e8d2c3 ("net/tls: Add support for async encryption of records for performance") Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com> Acked-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-01net/tls: Implement getsockopt SOL_TLS TLS_RXYutaro Hayakawa1-8/+17
Implement the getsockopt SOL_TLS TLS_RX which is currently missing. The primary usecase is to use it in conjunction with TCP_REPAIR to checkpoint/restore the TLS record layer state. TLS connection state usually exists on the user space library. So basically we can easily extract it from there, but when the TLS connections are delegated to the kTLS, it is not the case. We need to have a way to extract the TLS state from the kernel for both of TX and RX side. The new TLS_RX getsockopt copies the crypto_info to user in the same way as TLS_TX does. We have described use cases in our research work in Netdev 0x14 Transport Workshop [1]. Also, there is an TLS implementation called tlse [2] which supports TLS connection migration. They have support of kTLS and their code shows that they are expecting the future support of this option. [1] https://speakerdeck.com/yutarohayakawa/prism-proxies-without-the-pain [2] https://github.com/eduardsui/tlse Signed-off-by: Yutaro Hayakawa <yhayakawa3720@gmail.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-11net/tls: Fix kmap usageIra Weiny1-1/+2
When MSG_OOB is specified to tls_device_sendpage() the mapped page is never unmapped. Hold off mapping the page until after the flags are checked and the page is actually needed. Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure") Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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