- 03 Sep, 2018 1 commit
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Lorenzo Bianconi authored
Initialize 'n' to 2 in order to take into account also the first packet in the estimation of max_subframe limit for a given A-MSDU since frag_tail pointer is NULL when ieee80211_amsdu_aggregate routine analyzes the second frame. Fixes: 6e0456b5 ("mac80211: add A-MSDU tx support") Signed-off-by:
Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by:
Johannes Berg <johannes.berg@intel.com>
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- 30 Aug, 2018 3 commits
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Johannes Berg authored
In the error path of changing the SKB headroom of the second A-MSDU subframe, we would not account for the already-changed length of the first frame that just got converted to be in A-MSDU format and thus is a bit longer now. Fix this by doing the necessary accounting. It would be possible to reorder the operations, but that would make the code more complex (to calculate the necessary pad), and the headroom expansion should not fail frequently enough to make that worthwhile. Fixes: 6e0456b5 ("mac80211: add A-MSDU tx support") Signed-off-by:
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Lorenzo Bianconi authored
Do not start to aggregate packets in a A-MSDU frame (converting the first subframe to A-MSDU, adding the header) if max_tx_fragments or max_amsdu_subframes limits are already exceeded by it. In particular, this happens when drivers set the limit to 1 to avoid A-MSDUs at all. Signed-off-by:
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Arunk Khandavalli authored
nl80211_update_ft_ies() tried to validate NL80211_ATTR_IE with is_valid_ie_attr() before dereferencing it, but that helper function returns true in case of NULL pointer (i.e., attribute not included). This can result to dereferencing a NULL pointer. Fix that by explicitly checking that NL80211_ATTR_IE is included. Fixes: 355199e0 ("cfg80211: Extend support for IEEE 802.11r Fast BSS Transition") Signed-off-by:
Arunk Khandavalli <akhandav@codeaurora.org> Signed-off-by:
Jouni Malinen <jouni@codeaurora.org> Signed-off-by:
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- 29 Aug, 2018 2 commits
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Sara Sharon authored
When building building AMSDU from non-linear SKB, we hit a kernel panic when trying to push the padding to the tail. Instead, put the padding at the head of the next subframe. This also fixes the A-MSDU subframes to not have the padding accounted in the length field and not have pad at all for the last subframe, both required by the spec. Fixes: 6e0456b5 ("mac80211: add A-MSDU tx support") Signed-off-by:
Sara Sharon <sara.sharon@intel.com> Reviewed-by:
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Yuan-Chi Pang authored
IEEE 802.11-2016 14.10.8.3 HWMP sequence numbering says: If it is a target mesh STA, it shall update its own HWMP SN to maximum (current HWMP SN, target HWMP SN in the PREQ element) + 1 immediately before it generates a PREP element in response to a PREQ element. Signed-off-by:
Yuan-Chi Pang <fu3mo6goo@gmail.com> Signed-off-by:
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- 28 Aug, 2018 7 commits
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Haim Dreyfuss authored
freq_reg_info expects to get the frequency in kHz. Instead we accidently pass it in MHz. Thus, currently the function always return ERR rule. Fix that. Fixes: 50f32718 ("nl80211: Add wmm rule attribute to NL80211_CMD_GET_WIPHY dump command") Signed-off-by:
Haim Dreyfuss <haim.dreyfuss@intel.com> Signed-off-by:
Luca Coelho <luciano.coelho@intel.com> [fix kHz/MHz in commit message] Signed-off-by:
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Haim Dreyfuss authored
TXOP (also known as Channel Occupancy Time) is u16 and should be added using nla_put_u16 instead of u8, fix that. Fixes: 50f32718 ("nl80211: Add wmm rule attribute to NL80211_CMD_GET_WIPHY dump command") Signed-off-by:
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Jinbum Park authored
User controls @idx which to be used as index of hwsim_world_regdom_custom. So, It can be exploited via Spectre-like attack. (speculative execution) This kind of attack leaks address of hwsim_world_regdom_custom, It leads an attacker to bypass security mechanism such as KASLR. So sanitize @idx before using it to prevent attack. I leveraged strategy [1] to find and exploit this gadget. [1] https://github.com/jinb-park/linux-exploit/tree/master/exploit-remaining-spectre-gadget/Signed-off-by:
Jinbum Park <jinb.park7@gmail.com> [johannes: unwrap URL] Signed-off-by:
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Emmanuel Grumbach authored
I changed the way mac80211 updates the PM state of the peer. I forgot that we could also have multicast frames from the peer and that those frame should of course not change the PM state of the peer: A peer goes to power save when it needs to scan, but it won't send the broadcast Probe Request with the PM bit set. This made us mark the peer as awake when it wasn't and then Intel's firmware would fail to transmit because the peer is asleep according to its database. The driver warned about this and it looked like this: WARNING: CPU: 0 PID: 184 at /usr/src/linux-4.16.14/drivers/net/wireless/intel/iwlwifi/mvm/tx.c:1369 iwl_mvm_rx_tx_cmd+0x53b/0x860 CPU: 0 PID: 184 Comm: irq/124-iwlwifi Not tainted 4.16.14 #1 RIP: 0010:iwl_mvm_rx_tx_cmd+0x53b/0x860 Call Trace: iwl_pcie_rx_handle+0x220/0x880 iwl_pcie_irq_handler+0x6c9/0xa20 ? irq_forced_thread_fn+0x60/0x60 ? irq_thread_dtor+0x90/0x90 The relevant code that spits the WARNING is: case TX_STATUS_FAIL_DEST_PS: /* the FW should have stopped the queue and not * return this status */ WARN_ON(1); info->flags |= IEEE80211_TX_STAT_TX_FILTERED; This fixes https://bugzilla.kernel.org/show_bug.cgi?id=199967. Fixes: 9fef6544 ("mac80211: always update the PM state of a peer on MGMT / DATA frames") Cc: <stable@vger.kernel.org> #4.16+ Signed-off-by:Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by:
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Stanislaw Gruszka authored
Make wmm_rule be part of the reg_rule structure. This simplifies the code a lot at the cost of having bigger memory usage. However in most cases we have only few reg_rule's and when we do have many like in iwlwifi we do not save memory as it allocates a separate wmm_rule for each channel anyway. This also fixes a bug reported in various places where somewhere the pointers were corrupted and we ended up doing a null-dereference. Fixes: 230ebaa1 ("cfg80211: read wmm rules from regulatory database") Signed-off-by:
Stanislaw Gruszka <sgruszka@redhat.com> [rephrase commit message slightly] Signed-off-by:
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Danek Duvall authored
The mac80211_hwsim driver intends to say that it supports up to four STBC receive streams, but instead it ends up saying something undefined. The IEEE80211_VHT_CAP_RXSTBC_X macros aren't independent bits that can be ORed together, but values. In this case, _4 is the appropriate one to use. Signed-off-by:
Danek Duvall <duvall@comfychair.org> Signed-off-by:
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Danek Duvall authored
The mod mask for VHT capabilities intends to say that you can override the number of STBC receive streams, and it does, but only by accident. The IEEE80211_VHT_CAP_RXSTBC_X aren't bits to be set, but values (albeit left-shifted). ORing the bits together gets the right answer, but we should use the _MASK macro here instead. Signed-off-by:
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- 20 Aug, 2018 1 commit
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Johannes Berg authored
Pointer arithmetic already adjusts by the size of the struct, so the sizeof() calculation is wrong. This is basically the same as Colin King's patch for similar code in the iwlwifi driver. Fixes: 230ebaa1 ("cfg80211: read wmm rules from regulatory database") Signed-off-by:
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- 15 Aug, 2018 1 commit
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Johannes Berg authored
Syzbot continues to try to create mac80211_hwsim radios, and manages to pass parameters that are later checked with WARN_ON in cfg80211 - catch another one in hwsim directly. Reported-by: syzbot+2a12f11c306afe871c1f@syzkaller.appspotmail.com Signed-off-by:
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- 14 Aug, 2018 2 commits
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Toke Høiland-Jørgensen authored
The TXQ teardown code can reference the vif data structures that are stored in the netdev private memory area if there are still packets on the queue when it is being freed. Since the TXQ teardown code is run after the netdevs are freed, this can lead to a use-after-free. Fix this by moving the TXQ teardown code to earlier in ieee80211_unregister_hw(). Reported-by:
Ben Greear <greearb@candelatech.com> Tested-by:
Toke Høiland-Jørgensen <toke@toke.dk> Signed-off-by:
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Arnd Bergmann authored
One more driver is apparently broken by the recent change to linux/platform_device.h: net/rfkill/rfkill-gpio.c: In function 'rfkill_gpio_acpi_probe': net/rfkill/rfkill-gpio.c:82:29: error: dereferencing pointer to incomplete type 'const struct acpi_device_id' Include linux/mod_devicetable.h to get the definition of the acpi_device_id structure. Fixes: ac316725 ("headers: separate linux/mod_devicetable.h from linux/platform_device.h") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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- 11 Aug, 2018 9 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: "Last bit of straggler fixes... 1) Fix btf library licensing to LGPL, from Martin KaFai lau. 2) Fix error handling in bpf sockmap code, from Daniel Borkmann. 3) XDP cpumap teardown handling wrt. execution contexts, from Jesper Dangaard Brouer. 4) Fix loss of runtime PM on failed vlan add/del, from Ivan Khoronzhuk. 5) xen-netfront caches skb_shinfo(skb) across a __pskb_pull_tail() call, which potentially changes the skb's data buffer, and thus skb_shinfo(). Fix from Juergen Gross" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: xen/netfront: don't cache skb_shinfo() net: ethernet: ti: cpsw: fix runtime_pm while add/kill vlan net: ethernet: ti: cpsw: clear all entries when delete vid xdp: fix bug in devmap teardown code path samples/bpf: xdp_redirect_cpu adjustment to reproduce teardown race easier xdp: fix bug in cpumap teardown code path bpf, sockmap: fix cork timeout for select due to epipe bpf, sockmap: fix leak in bpf_tcp_sendmsg wait for mem path bpf, sockmap: fix bpf_tcp_sendmsg sock error handling bpf: btf: Change tools/lib/bpf/btf to LGPL -
Juergen Gross authored
skb_shinfo() can change when calling __pskb_pull_tail(): Don't cache its return value. Cc: stable@vger.kernel.org Signed-off-by:
Juergen Gross <jgross@suse.com> Reviewed-by:
Wei Liu <wei.liu2@citrix.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Grygorii Strashko says: ==================== net: ethernet: ti: cpsw: fix runtime pm while add/del reserved vid Here 2 not critical fixes for: - vlan ale table leak while error if deleting vlan (simplifies next fix) - runtime pm while try to set reserved vlan ==================== Reviewed-by:
Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by:
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Ivan Khoronzhuk authored
It's exclusive with normal behaviour but if try to set vlan to one of the reserved values is made, the cpsw runtime pm is broken. Fixes: a6c5d14f ("drivers: net: cpsw: ndev: fix accessing to suspended device") Signed-off-by:
Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by:
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Ivan Khoronzhuk authored
In cases if some of the entries were not found in forwarding table while killing vlan, the rest not needed entries still left in the table. No need to stop, as entry was deleted anyway. So fix this by returning error only after all was cleaned. To implement this, return -ENOENT in cpsw_ale_del_mcast() as it's supposed to be. Signed-off-by:
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Minchan Kim authored
If zram supports writeback feature, it's no longer a BD_CAP_SYNCHRONOUS_IO device beause zram does asynchronous IO operations for incompressible pages. Do not pretend to be synchronous IO device. It makes the system very sluggish due to waiting for IO completion from upper layers. Furthermore, it causes a user-after-free problem because swap thinks the opearion is done when the IO functions returns so it can free the page (e.g., lock_page_or_retry and goto out_release in do_swap_page) but in fact, IO is asynchronous so the driver could access a just freed page afterward. This patch fixes the problem. BUG: Bad page state in process qemu-system-x86 pfn:3dfab21 page:ffffdfb137eac840 count:0 mapcount:0 mapping:0000000000000000 index:0x1 flags: 0x17fffc000000008(uptodate) raw: 017fffc000000008 dead000000000100 dead000000000200 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_PREP flag set bad because of flags: 0x8(uptodate) CPU: 4 PID: 1039 Comm: qemu-system-x86 Tainted: G B 4.18.0-rc5+ #1 Hardware name: Supermicro Super Server/X10SRL-F, BIOS 2.0b 05/02/2017 Call Trace: dump_stack+0x5c/0x7b bad_page+0xba/0x120 get_page_from_freelist+0x1016/0x1250 __alloc_pages_nodemask+0xfa/0x250 alloc_pages_vma+0x7c/0x1c0 do_swap_page+0x347/0x920 __handle_mm_fault+0x7b4/0x1110 handle_mm_fault+0xfc/0x1f0 __get_user_pages+0x12f/0x690 get_user_pages_unlocked+0x148/0x1f0 __gfn_to_pfn_memslot+0xff/0x3c0 [kvm] try_async_pf+0x87/0x230 [kvm] tdp_page_fault+0x132/0x290 [kvm] kvm_mmu_page_fault+0x74/0x570 [kvm] kvm_arch_vcpu_ioctl_run+0x9b3/0x1990 [kvm] kvm_vcpu_ioctl+0x388/0x5d0 [kvm] do_vfs_ioctl+0xa2/0x630 ksys_ioctl+0x70/0x80 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x55/0x100 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Link: https://lore.kernel.org/lkml/0516ae2d-b0fd-92c5-aa92-112ba7bd32fc@contabo.de/ Link: http://lkml.kernel.org/r/20180802051112.86174-1-minchan@kernel.org [minchan@kernel.org: fix changelog, add comment] Link: https://lore.kernel.org/lkml/0516ae2d-b0fd-92c5-aa92-112ba7bd32fc@contabo.de/ Link: http://lkml.kernel.org/r/20180802051112.86174-1-minchan@kernel.org Link: http://lkml.kernel.org/r/20180805233722.217347-1-minchan@kernel.org [akpm@linux-foundation.org: coding-style fixes] Signed-off-by:Minchan Kim <minchan@kernel.org> Reported-by:
Tino Lehnig <tino.lehnig@contabo.de> Tested-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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jie@chenjie6@huwei.com authored
ioremap_prot() can return NULL which could lead to an oops. Link: http://lkml.kernel.org/r/1533195441-58594-1-git-send-email-chenjie6@huawei.comSigned-off-by:
chen jie <chenjie6@huawei.com> Reviewed-by:
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Andrey Ryabinin authored
With gcc-8 fsanitize=null become very noisy. GCC started to complain about things like &a->b, where 'a' is NULL pointer. There is no NULL dereference, we just calculate address to struct member. It's technically undefined behavior so UBSAN is correct to report it. But as long as there is no real NULL-dereference, I think, we should be fine. -fno-delete-null-pointer-checks compiler flag should protect us from any consequences. So let's just no use -fsanitize=null as it's not useful for us. If there is a real NULL-deref we will see crash. Even if userspace mapped something at NULL (root can do this), with things like SMAP should catch the issue. Link: http://lkml.kernel.org/r/20180802153209.813-1-aryabinin@virtuozzo.comSigned-off-by:
Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by:
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Kieran Bingham authored
This entry was created with my personal e-mail address. Update this entry to my open-source kernel.org account. Link: http://lkml.kernel.org/r/20180806143904.4716-4-kieran.bingham@ideasonboard.comSigned-off-by:
Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by:
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- 10 Aug, 2018 2 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull i2c fix from Wolfram Sang: "A single driver bugfix for I2C. The bug was found by systematically stress testing the driver, so I am confident to merge it that late in the cycle although it is probably unusually large" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: xlp9xx: Fix case where SSIF read transaction completes early
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git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller authored
Daniel Borkmann says: ==================== pull-request: bpf 2018-08-10 The following pull-request contains BPF updates for your *net* tree. The main changes are: 1) Fix cpumap and devmap on teardown as they're under RCU context and won't have same assumption as running under NAPI protection, from Jesper. 2) Fix various sockmap bugs in bpf_tcp_sendmsg() code, e.g. we had a bug where socket error was not propagated correctly, from Daniel. 3) Fix incompatible libbpf header license for BTF code and match it before it gets officially released with the rest of libbpf which is LGPL-2.1, from Martin. ==================== Signed-off-by:
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- 09 Aug, 2018 12 commits
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Daniel Borkmann authored
Jesper Dangaard Brouer says: ==================== Removing entries from cpumap and devmap, goes through a number of syncronization steps to make sure no new xdp_frames can be enqueued. But there is a small chance, that xdp_frames remains which have not been flushed/processed yet. Flushing these during teardown, happens from RCU context and not as usual under RX NAPI context. The optimization introduced in commt 389ab7f0 ("xdp: introduce xdp_return_frame_rx_napi"), missed that the flush operation can also be called from RCU context. Thus, we cannot always use the xdp_return_frame_rx_napi call, which take advantage of the protection provided by XDP RX running under NAPI protection. The samples/bpf xdp_redirect_cpu have a --stress-mode, that is adjusted to easier reproduce (verified by Red Hat QA). ==================== Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net>
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Jesper Dangaard Brouer authored
Like cpumap teardown, the devmap teardown code also flush remaining xdp_frames, via bq_xmit_all() in case map entry is removed. The code can call xdp_return_frame_rx_napi, from the the wrong context, in-case ndo_xdp_xmit() fails. Fixes: 389ab7f0 ("xdp: introduce xdp_return_frame_rx_napi") Fixes: 735fc405 ("xdp: change ndo_xdp_xmit API to support bulking") Signed-off-by:
Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by:
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Jesper Dangaard Brouer authored
The teardown race in cpumap is really hard to reproduce. These changes makes it easier to reproduce, for QA. The --stress-mode now have a case of a very small queue size of 8, that helps to trigger teardown flush to encounter a full queue, which results in calling xdp_return_frame API, in a non-NAPI protect context. Also increase MAX_CPUS, as my QA department have larger machines than me. Tested-by:
Jean-Tsung Hsiao <jhsiao@redhat.com> Signed-off-by:
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Jesper Dangaard Brouer authored
When removing a cpumap entry, a number of syncronization steps happen. Eventually the teardown code __cpu_map_entry_free is invoked from/via call_rcu. The teardown code __cpu_map_entry_free() flushes remaining xdp_frames, by invoking bq_flush_to_queue, which calls xdp_return_frame_rx_napi(). The issues is that the teardown code is not running in the RX NAPI code path. Thus, it is not allowed to invoke the NAPI variant of xdp_return_frame. This bug was found and triggered by using the --stress-mode option to the samples/bpf program xdp_redirect_cpu. It is hard to trigger, because the ptr_ring have to be full and cpumap bulk queue max contains 8 packets, and a remote CPU is racing to empty the ptr_ring queue. Fixes: 389ab7f0 ("xdp: introduce xdp_return_frame_rx_napi") Tested-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
Pull crypto fix from Herbert Xu: "This fixes a performance regression in arm64 NEON crypto as well as a crash in x86 aegis/morus on unsupported CPUs" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: x86/aegis,morus - Fix and simplify CPUID checks crypto: arm64 - revert NEON yield for fast AEAD implementations
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) The real fix for the ipv6 route metric leak Sabrina was seeing, from Cong Wang. 2) Fix syzbot triggers AF_PACKET v3 ring buffer insufficient room conditions, from Willem de Bruijn. 3) vsock can reinitialize active work struct, fix from Cong Wang. 4) RXRPC keepalive generator can wedge a cpu, fix from David Howells. 5) Fix locking in AF_SMC ioctl, from Ursula Braun. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: dsa: slave: eee: Allow ports to use phylink net/smc: move sock lock in smc_ioctl() net/smc: allow sysctl rmem and wmem defaults for servers net/smc: no shutdown in state SMC_LISTEN net: aquantia: Fix IFF_ALLMULTI flag functionality rxrpc: Fix the keepalive generator [ver #2] net/mlx5e: Cleanup of dcbnl related fields net/mlx5e: Properly check if hairpin is possible between two functions vhost: reset metadata cache when initializing new IOTLB llc: use refcount_inc_not_zero() for llc_sap_find() dccp: fix undefined behavior with 'cwnd' shift in ccid2_cwnd_restart() tipc: fix an interrupt unsafe locking scenario vsock: split dwork to avoid reinitializations net: thunderx: check for failed allocation lmac->dmacs cxgb4: mk_act_open_req() buggers ->{local, peer}_ip on big-endian hosts packet: refine ring v3 block size test to hold one frame ip6_tunnel: use the right value for ipv4 min mtu check in ip6_tnl_xmit ipv6: fix double refcount of fib6_metrics -
George Cherian authored
During ipmi stress tests we see occasional failure of transactions at the boot time. This happens in the case of a I2C_M_RECV_LEN transactions, when the read transfer completes (with the initial read length of 34) before the driver gets a chance to handle interrupts. The current driver code expects at least 2 interrupts for I2C_M_RECV_LEN transactions. The length is updated during the first interrupt, and the buffer contents are only copied during subsequent interrupts. In case of just one interrupt, we will complete the transaction without copying out the bytes from RX fifo. Update the code to drain the RX fifo after the length update, so that the transaction completes correctly in all cases. Signed-off-by:
George Cherian <george.cherian@cavium.com> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
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Andrew Lunn authored
For a port to be able to use EEE, both the MAC and the PHY must support EEE. A phy can be provided by both a phydev or phylink. Verify at least one of these exist, not just phydev. Fixes: aab9c406 ("net: dsa: Plug in PHYLINK support") Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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David S. Miller authored
Ursula Braun says: ==================== net/smc: fixes 2018-08-08 here are small fixes for SMC: The first patch makes sure, shutdown code is not executed for sockets in state SMC_LISTEN. The second patch resets send and receive buffer values for accepted sockets, since TCP buffer size optimizations for the internal CLC socket should not be forwarded to the outer SMC socket. The third patch solves a race between connect and ioctl reported by syzbot. ==================== Signed-off-by: -
Ursula Braun authored
When an SMC socket is connecting it is decided whether fallback to TCP is needed. To avoid races between connect and ioctl move the sock lock before the use_fallback check. Reported-by: syzbot+5b2cece1a8ecb2ca77d8@syzkaller.appspotmail.com Reported-by: syzbot+19557374321ca3710990@syzkaller.appspotmail.com Fixes: 1992d998 ("net/smc: take sock lock in smc_ioctl()") Signed-off-by:
Ursula Braun <ubraun@linux.ibm.com> Signed-off-by:
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Ursula Braun authored
Without setsockopt SO_SNDBUF and SO_RCVBUF settings, the sysctl defaults net.ipv4.tcp_wmem and net.ipv4.tcp_rmem should be the base for the sizes of the SMC sndbuf and rcvbuf. Any TCP buffer size optimizations for servers should be ignored. Signed-off-by:
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Ursula Braun authored
Invoking shutdown for a socket in state SMC_LISTEN does not make sense. Nevertheless programs like syzbot fuzzing the kernel may try to do this. For SMC this means a socket refcounting problem. This patch makes sure a shutdown call for an SMC socket in state SMC_LISTEN simply returns with -ENOTCONN. Signed-off-by:
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