- 15 May, 2020 4 commits
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Alexei Starovoitov authored
Daniel Borkmann says: ==================== Small set of fixes in order to restrict BPF helpers for tracing which are broken on archs with overlapping address ranges as per discussion in [0]. I've targetted this for -bpf tree so they can be routed as fixes. Thanks! v1 -> v2: - switch to reusable %pks, %pus format specifiers (Yonghong) - fixate %s on kernel_ds probing for archs with overlapping addr space [0] https://lore.kernel.org/bpf/CAHk-=wjJKo0GVixYLmqPn-Q22WFu0xHaBSjKEo7e7Yw72y5SPQ@mail.gmail.com/T/ ==================== Signed-off-by:Alexei Starovoitov <ast@kernel.org>
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Daniel Borkmann authored
Usage of plain %s conversion specifier in bpf_trace_printk() suffers from the very same issue as bpf_probe_read{,str}() helpers, that is, it is broken on archs with overlapping address ranges. While the helpers have been addressed through work in 6ae08ae3 ("bpf: Add probe_read_{user, kernel} and probe_read_{user, kernel}_str helpers"), we need an option for bpf_trace_printk() as well to fix it. Similarly as with the helpers, force users to make an explicit choice by adding %pks and %pus specifier to bpf_trace_printk() which will then pick the corresponding strncpy_from_unsafe*() variant to perform the access under KERNEL_DS or USER_DS. The %pk* (kernel specifier) and %pu* (user specifier) can later also be extended for other objects aside strings that are probed and printed under tracing, and reused out of other facilities like bpf_seq_printf() or BTF based type printing. Existing behavior of %s for current users is still kept working for archs where it is not broken and therefore gated through CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE. For archs not having this property we fall-back to pick probing under KERNEL_DS as a sensible default. Fixes: 8d3b7dce ("bpf: add support for %s specifier to bpf_trace_printk()") Reported-by:Linus Torvalds <torvalds@linux-foundation.org> Reported-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
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Daniel Borkmann authored
Given bpf_probe_read{,str}() BPF helpers are now only available under CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE, we need to add the drop-in replacements of bpf_probe_read_{kernel,user}_str() to do_refine_retval_range() as well to avoid hitting the same issue as in 849fa506 ("bpf/verifier: refine retval R0 state for bpf_get_stack helper"). Signed-off-by:John Fastabend <john.fastabend@gmail.com> Acked-by:
Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200515101118.6508-3-daniel@iogearbox.net
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Daniel Borkmann authored
Given the legacy bpf_probe_read{,str}() BPF helpers are broken on archs with overlapping address ranges, we should really take the next step to disable them from BPF use there. To generally fix the situation, we've recently added new helper variants bpf_probe_read_{user,kernel}() and bpf_probe_read_{user,kernel}_str(). For details on them, see 6ae08ae3 ("bpf: Add probe_read_{user, kernel} and probe_read_{user,kernel}_str helpers"). Given bpf_probe_read{,str}() have been around for ~5 years by now, there are plenty of users at least on x86 still relying on them today, so we cannot remove them entirely w/o breaking the BPF tracing ecosystem. However, their use should be restricted to archs with non-overlapping address ranges where they are working in their current form. Therefore, move this behind a CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE and have x86, arm64, arm select it (other archs supporting it can follow-up on it as well). For the remaining archs, they can workaround easily by relying on the feature probe from bpftool which spills out defines that can be used out of BPF C code to implement the drop-in replacement for old/new kernels via: bpftool feature probe macro Suggested-by:Masami Hiramatsu <mhiramat@kernel.org> Acked-by:
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- 14 May, 2020 6 commits
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Yonghong Song authored
There are a few fentry/fexit programs returning non-0. The tests with these programs will break with the previous patch which enfoced return-0 rules. Fix them properly. Fixes: ac065870 ("selftests/bpf: Add BPF_PROG, BPF_KPROBE, and BPF_KRETPROBE macros") Signed-off-by:
Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200514053207.1298479-1-yhs@fb.com
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Yonghong Song authored
Currently, tracing/fentry and tracing/fexit prog return values are not enforced. In trampoline codes, the fentry/fexit prog return values are ignored. Let us enforce it to be 0 to avoid confusion and allows potential future extension. This patch also explicitly added return value checking for tracing/raw_tp, tracing/fmod_ret, and freplace programs such that these program return values can be anything. The purpose are two folds: 1. to make it explicit about return value expectations for these programs in verifier. 2. for tracing prog_type, if a future attach type is added, the default is -ENOTSUPP which will enforce to specify return value ranges explicitly. Fixes: fec56f58 ("bpf: Introduce BPF trampoline") Signed-off-by: -
Anders Roxell authored
security_secid_to_secctx is called by the bpf_lsm hook and a successful return value (i.e 0) implies that the parameter will be consumed by the LSM framework. The current behaviour return success when the pointer isn't initialized when CONFIG_BPF_LSM is enabled, with the default return from kernel/bpf/bpf_lsm.c. This is the internal error: [ 1229.341488][ T2659] usercopy: Kernel memory exposure attempt detected from null address (offset 0, size 280)! [ 1229.374977][ T2659] ------------[ cut here ]------------ [ 1229.376813][ T2659] kernel BUG at mm/usercopy.c:99! [ 1229.378398][ T2659] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 1229.380348][ T2659] Modules linked in: [ 1229.381654][ T2659] CPU: 0 PID: 2659 Comm: systemd-journal Tainted: G B W 5.7.0-rc5-next-20200511-00019-g864e0c6319b8-dirty #13 [ 1229.385429][ T2659] Hardware name: linux,dummy-virt (DT) [ 1229.387143][ T2659] pstate: 80400005 (Nzcv daif +PAN -UAO BTYPE=--) [ 1229.389165][ T2659] pc : usercopy_abort+0xc8/0xcc [ 1229.390705][ T2659] lr : usercopy_abort+0xc8/0xcc [ 1229.392225][ T2659] sp : ffff000064247450 [ 1229.393533][ T2659] x29: ffff000064247460 x28: 0000000000000000 [ 1229.395449][ T2659] x27: 0000000000000118 x26: 0000000000000000 [ 1229.397384][ T2659] x25: ffffa000127049e0 x24: ffffa000127049e0 [ 1229.399306][ T2659] x23: ffffa000127048e0 x22: ffffa000127048a0 [ 1229.401241][ T2659] x21: ffffa00012704b80 x20: ffffa000127049e0 [ 1229.403163][ T2659] x19: ffffa00012704820 x18: 0000000000000000 [ 1229.405094][ T2659] x17: 0000000000000000 x16: 0000000000000000 [ 1229.407008][ T2659] x15: 0000000000000000 x14: 003d090000000000 [ 1229.408942][ T2659] x13: ffff80000d5b25b2 x12: 1fffe0000d5b25b1 [ 1229.410859][ T2659] x11: 1fffe0000d5b25b1 x10: ffff80000d5b25b1 [ 1229.412791][ T2659] x9 : ffffa0001034bee0 x8 : ffff00006ad92d8f [ 1229.414707][ T2659] x7 : 0000000000000000 x6 : ffffa00015eacb20 [ 1229.416642][ T2659] x5 : ffff0000693c8040 x4 : 0000000000000000 [ 1229.418558][ T2659] x3 : ffffa0001034befc x2 : d57a7483a01c6300 [ 1229.420610][ T2659] x1 : 0000000000000000 x0 : 0000000000000059 [ 1229.422526][ T2659] Call trace: [ 1229.423631][ T2659] usercopy_abort+0xc8/0xcc [ 1229.425091][ T2659] __check_object_size+0xdc/0x7d4 [ 1229.426729][ T2659] put_cmsg+0xa30/0xa90 [ 1229.428132][ T2659] unix_dgram_recvmsg+0x80c/0x930 [ 1229.429731][ T2659] sock_recvmsg+0x9c/0xc0 [ 1229.431123][ T2659] ____sys_recvmsg+0x1cc/0x5f8 [ 1229.432663][ T2659] ___sys_recvmsg+0x100/0x160 [ 1229.434151][ T2659] __sys_recvmsg+0x110/0x1a8 [ 1229.435623][ T2659] __arm64_sys_recvmsg+0x58/0x70 [ 1229.437218][ T2659] el0_svc_common.constprop.1+0x29c/0x340 [ 1229.438994][ T2659] do_el0_svc+0xe8/0x108 [ 1229.440587][ T2659] el0_svc+0x74/0x88 [ 1229.441917][ T2659] el0_sync_handler+0xe4/0x8b4 [ 1229.443464][ T2659] el0_sync+0x17c/0x180 [ 1229.444920][ T2659] Code: aa1703e2 aa1603e1 910a8260 97ecc860 (d4210000) [ 1229.447070][ T2659] ---[ end trace 400497d91baeaf51 ]--- [ 1229.448791][ T2659] Kernel panic - not syncing: Fatal exception [ 1229.450692][ T2659] Kernel Offset: disabled [ 1229.452061][ T2659] CPU features: 0x240002,20002004 [ 1229.453647][ T2659] Memory Limit: none [ 1229.455015][ T2659] ---[ end Kernel panic - not syncing: Fatal exception ]--- Rework the so the default return value is -EOPNOTSUPP. There are likely other callbacks such as security_inode_getsecctx() that may have the same problem, and that someone that understand the code better needs to audit them. Thank you Arnd for helping me figure out what went wrong. Fixes: 98e828a0 ("security: Refactor declaration of LSM hooks") Signed-off-by:
Anders Roxell <anders.roxell@linaro.org> Signed-off-by:
James Morris <jamorris@linux.microsoft.com> Cc: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/bpf/20200512174607.9630-1-anders.roxell@linaro.org
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Sumanth Korikkar authored
Fix register naming in PT_REGS s390 macros Fixes: b8ebce86 ("libbpf: Provide CO-RE variants of PT_REGS macros") Signed-off-by:
Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by:
Julian Wiedmann <jwi@linux.ibm.com> Acked-by:
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Andrii Nakryiko authored
mmap() subsystem allows user-space application to memory-map region with initial page offset. This wasn't taken into account in initial implementation of BPF array memory-mapping. This would result in wrong pages, not taking into account requested page shift, being memory-mmaped into user-space. This patch fixes this gap and adds a test for such scenario. Fixes: fc970227 ("bpf: Add mmap() support for BPF_MAP_TYPE_ARRAY") Signed-off-by:
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Matteo Croce authored
GCC 10 is very strict about symbol clash, and lwt_len_hist_user contains a symbol which clashes with libbpf: /usr/bin/ld: samples/bpf/lwt_len_hist_user.o:(.bss+0x0): multiple definition of `bpf_log_buf'; samples/bpf/bpf_load.o:(.bss+0x8c0): first defined here collect2: error: ld returned 1 exit status bpf_log_buf here seems to be a leftover, so removing it. Signed-off-by:
Matteo Croce <mcroce@redhat.com> Signed-off-by:
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- 13 May, 2020 10 commits
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Heiner Kallweit authored
phy_restart_aneg() enables aneg in the PHY. That's not what we want if phydev->autoneg is disabled. In this case still update EEE advertisement register, but don't enable aneg and don't trigger an aneg restart. Fixes: f75abeb8 ("net: phy: restart phy autonegotiation after EEE advertisment change") Signed-off-by:
Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Florian Fainelli authored
The GENET controller on the Raspberry Pi 4 (2711) is typically interfaced with an external Broadcom PHY via a RGMII electrical interface. To make sure that delays are properly configured at the PHY side, ensure that we the dedicated Broadcom PHY driver (CONFIG_BROADCOM_PHY) is enabled for this to happen. Fixes: 402482a6 ("net: bcmgenet: Clear ID_MODE_DIS in EXT_RGMII_OOB_CTRL when not needed") Reported-by:
Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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David S. Miller authored
Tuong Lien says: ==================== tipc: add some patches This series adds patches to fix some issues in TIPC streaming & service subscription. ==================== Signed-off-by: -
Tuong Lien authored
When a service subscription is expired or canceled by user, it needs to be deleted from the subscription list, so that new subscriptions can be registered (max = 65535 per net). However, there are two issues in code that can cause such an unused subscription to persist: 1) The 'tipc_conn_delete_sub()' has a loop on the subscription list but it makes a break shortly when the 1st subscription differs from the one specified, so the subscription will not be deleted. 2) In case a subscription is canceled, the code to remove the 'TIPC_SUB_CANCEL' flag from the subscription filter does not work if it is a local subscription (i.e. the little endian isn't involved). So, it will be no matches when looking for the subscription to delete later. The subscription(s) will be removed eventually when the user terminates its topology connection but that could be a long time later. Meanwhile, the number of available subscriptions may be exhausted. This commit fixes the two issues above, so as needed a subscription can be deleted correctly. Acked-by:
Ying Xue <ying.xue@windriver.com> Acked-by:
Jon Maloy <jmaloy@redhat.com> Signed-off-by:
Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by:
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Tuong Lien authored
Upon receipt of a service subscription request from user via a topology connection, one 'sub' object will be allocated in kernel, so it will be able to send an event of the service if any to the user correspondingly then. Also, in case of any failure, the connection will be shutdown and all the pertaining 'sub' objects will be freed. However, there is a race condition as follows resulting in memory leak: receive-work connection send-work | | | sub-1 |<------//-------| | sub-2 |<------//-------| | | |<---------------| evt for sub-x sub-3 |<------//-------| | : : : : : : | /--------| | | | * peer closed | | | | | | | |<-------X-------| evt for sub-y | | |<===============| sub-n |<------/ X shutdown | -> orphan | | That is, the 'receive-work' may get the last subscription request while the 'send-work' is shutting down the connection due to peer close. We had a 'lock' on the connection, so the two actions cannot be carried out simultaneously. If the last subscription is allocated e.g. 'sub-n', before the 'send-work' closes the connection, there will be no issue at all, the 'sub' objects will be freed. In contrast the last subscription will become orphan since the connection was closed, and we released all references. This commit fixes the issue by simply adding one test if the connection remains in 'connected' state right after we obtain the connection lock, then a subscription object can be created as usual, otherwise we ignore it. Acked-by:Thang Ngo <thang.h.ngo@dektech.com.au> Signed-off-by:
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Tuong Lien authored
Currently when a connection is in Nagle mode, we set the 'ack_required' bit in the last sending buffer and wait for the corresponding ACK prior to pushing more data. However, on the receiving side, the ACK is issued only when application really reads the whole data. Even if part of the last buffer is received, we will not do the ACK as required. This might cause an unnecessary delay since the receiver does not always fetch the message as fast as the sender, resulting in a large latency in the user message sending, which is: [one RTT + the receiver processing time]. The commit makes Nagle ACK as soon as possible i.e. when a message with the 'ack_required' arrives in the receiving side's stack even before it is processed or put in the socket receive queue... This way, we can limit the streaming latency to one RTT as committed in Nagle mode. Acked-by:
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David S. Miller authored
Ursula Braun says: ==================== s390/net: updates 2020-05-13 please apply the fix from Wei Yongjun to netdev's net tree and add Karsten Graul as co-maintainer for drivers/s390/net. ==================== Signed-off-by: -
Ursula Braun authored
Add Karsten as additional maintainer for drivers/s390/net . One of his focal points is the ism driver. Cc: Julian Wiedmann <jwi@linux.ibm.com> Acked-by:
Ursula Braun <ubraun@linux.ibm.com> Signed-off-by:
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Wei Yongjun authored
Fix to return negative error code -ENOMEM from the smcd_alloc_dev() error handling case instead of 0, as done elsewhere in this function. Fixes: 684b89bc ("s390/ism: add device driver for internal shared memory") Reported-by:
Hulk Robot <hulkci@huawei.com> Signed-off-by:
Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by:
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Paolo Abeni authored
The cipso and calipso code can set the MLS_CAT attribute on successful parsing, even if the corresponding catmap has not been allocated, as per current configuration and external input. Later, selinux code tries to access the catmap if the MLS_CAT flag is present via netlbl_catmap_getlong(). That may cause null ptr dereference while processing incoming network traffic. Address the issue setting the MLS_CAT flag only if the catmap is really allocated. Additionally let netlbl_catmap_getlong() cope with NULL catmap. Reported-by:
Matthew Sheets <matthew.sheets@gd-ms.com> Fixes: 4b8feff2 ("netlabel: fix the horribly broken catmap functions") Fixes: ceba1832 ("calipso: Set the calipso socket label to match the secattr.") Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Acked-by:
Paul Moore <paul@paul-moore.com> Signed-off-by:
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- 12 May, 2020 7 commits
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Eric Dumazet authored
We autotune rcvbuf whenever SO_RCVLOWAT is set to account for 100% overhead in tcp_set_rcvlowat() This works well when skb->len/skb->truesize ratio is bigger than 0.5 But if we receive packets with small MSS, we can end up in a situation where not enough bytes are available in the receive queue to satisfy RCVLOWAT setting. As our sk_rcvbuf limit is hit, we send zero windows in ACK packets, preventing remote peer from sending more data. Even autotuning does not help, because it only triggers at the time user process drains the queue. If no EPOLLIN is generated, this can not happen. Note poll() has a similar issue, after commit c7004482 ("tcp: Respect SO_RCVLOWAT in tcp_poll().") Fixes: 03f45c88 ("tcp: avoid extra wakeups for SO_RCVLOWAT users") Signed-off-by:
Eric Dumazet <edumazet@google.com> Acked-by:
Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by:
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Clay McClure authored
My recent commit b6d49cab ("net: Make PTP-specific drivers depend on PTP_1588_CLOCK") exposes a missing dependency in defconfigs that select TI_CPTS without selecting PTP_1588_CLOCK, leading to linker errors of the form: drivers/net/ethernet/ti/cpsw.o: in function `cpsw_ndo_stop': cpsw.c:(.text+0x680): undefined reference to `cpts_unregister' ... That's because TI_CPTS_MOD (which is the symbol gating the _compilation_ of cpts.c) now depends on PTP_1588_CLOCK, and so is not enabled in these configurations, but TI_CPTS (which is the symbol gating _calls_ to the cpts functions) _is_ enabled. So we end up compiling calls to functions that don't exist, resulting in the linker errors. This patch fixes build errors and restores previous behavior by: - ensure PTP_1588_CLOCK=y in TI specific configs and CPTS will be built - remove TI_CPTS_MOD and, instead, add dependencies from CPTS in TI_CPSW/TI_KEYSTONE_NETCP/TI_CPSW_SWITCHDEV as below: config TI_CPSW_SWITCHDEV ... depends on TI_CPTS || !TI_CPTS which will ensure proper dependencies PTP_1588_CLOCK -> TI_CPTS -> TI_CPSW/TI_KEYSTONE_NETCP/TI_CPSW_SWITCHDEV and build type selection. Note. For NFS boot + CPTS all of above configs have to be built-in. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dan Murphy <dmurphy@ti.com> Cc: Tony Lindgren <tony@atomide.com> Fixes: b6d49cab ("net: Make PTP-specific drivers depend on PTP_1588_CLOCK") Reported-by:
kbuild test robot <lkp@intel.com> Signed-off-by:
Clay McClure <clay@daemons.net> [grygorii.strashko@ti.com: rewording, add deps cpsw/netcp from cpts, drop IS_REACHABLE] Signed-off-by:
Grygorii Strashko <grygorii.strashko@ti.com> Reviewed-by:
Arnd Bergmann <arnd@arndb.de> Tested-by:
Tony Lindgren <tony@atomide.com> Signed-off-by:
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David S. Miller authored
Shannon Nelson says: ==================== ionic fixes These are a couple more fixes after more fw-upgrade testing. ==================== Signed-off-by: -
Shannon Nelson authored
Since the fw has been re-inited, we need to refresh the port information dma address so we can see fresh port information. Let's call ionic_port_init again, and tweak it to allow for a call to simply refresh the existing dma address. Fixes: c672412f ("ionic: remove lifs on fw reset") Signed-off-by:
Shannon Nelson <snelson@pensando.io> Signed-off-by:
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Shannon Nelson authored
When running in a bond setup, or some other potential configurations, the netdev mac may have been changed from the default device mac. Since the userland doesn't know about the changes going on under the covers in a fw-upgrade it doesn't know the re-push the mac filter. The driver needs to leave the netdev mac filter alone when rebuilding after the fw-upgrade. Fixes: c672412f ("ionic: remove lifs on fw reset") Signed-off-by:
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Jacob Keller authored
The do_aux_work callback had documentation in the structure comment which referred to it as "do_work". Signed-off-by:
Jacob Keller <jacob.e.keller@intel.com> Cc: Richard Cochran <richardcochran@gmail.com> Acked-by:
Richard Cochran <richardcochran@gmail.com> Signed-off-by:
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Christoph Paasch authored
When the other MPTCP-peer uses 32-bit data-sequence numbers, we rely on map_seq to indicate how to expand to a 64-bit data-sequence number in expand_seq() when receiving data. For new subflows, this field is not initialized, thus results in an "invalid" mapping being discarded. Fix this by initializing map_seq upon subflow establishment time. Fixes: f296234c ("mptcp: Add handling of incoming MP_JOIN requests") Signed-off-by:
Christoph Paasch <cpaasch@apple.com> Reviewed-by:
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- 11 May, 2020 4 commits
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David S. Miller authored
Alex Elder says: ==================== net: ipa: fix cleanup after modem crash The first patch in this series fixes a bug where the size of a data transfer request was never set, meaning it was 0. The consequence of this was that such a transfer request would never complete if attempted, and led to a hung task timeout. This data transfer is required for cleaning up IPA hardware state when recovering from a modem crash. The code to implement this cleanup is already present, but its use was commented out because it hit the bug described above. So the second patch in this series enables the use of that "tag process" cleanup code. ==================== Signed-off-by: -
Alex Elder authored
One part of recovering from a modem crash is performing a "tag sequence" of several IPA immediate commands, to clear the hardware pipeline. The sequence ends with a data transfer request on the command endpoint (which is not otherwise done). Unfortunately, attempting to do the data transfer led to a hang, so that request plus two other commands were commented out. The previous commit fixes the bug that was causing that hang. And with that bug fixed we can properly issue the tag sequence when the modem crashes, to return the hardware to a known state. Signed-off-by:
Alex Elder <elder@linaro.org> Signed-off-by:
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Alex Elder authored
When a command gets added to a transaction for the AP->command channel we set the DMA address of its scatterlist entry, but not its DMA length. Fix this bug. Signed-off-by:
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Luo bin authored
if some function in ndo_stop interface returns failure because of hardware fault, must go on excuting rest steps rather than return failure directly, otherwise will cause memory leak.And bump the timeout for SET_FUNC_STATE to ensure that cmd won't return failure when hw is busy. Otherwise hw may stomp host memory if we free memory regardless of the return value of SET_FUNC_STATE. Fixes: 51ba902a ("net-next/hinic: Initialize hw interface") Signed-off-by:
Luo bin <luobin9@huawei.com> Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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- 10 May, 2020 2 commits
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Florian Fainelli authored
There is a soft dependency against dsa_loop_bdinfo.ko which sets up the MDIO device registration, since there are no symbols referenced by dsa_loop.ko, there is no automatic loading of dsa_loop_bdinfo.ko which is needed. Fixes: 98cd1552 ("net: dsa: Mock-up driver") Signed-off-by:
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Zefan Li authored
If systemd is configured to use hybrid mode which enables the use of both cgroup v1 and v2, systemd will create new cgroup on both the default root (v2) and netprio_cgroup hierarchy (v1) for a new session and attach task to the two cgroups. If the task does some network thing then the v2 cgroup can never be freed after the session exited. One of our machines ran into OOM due to this memory leak. In the scenario described above when sk_alloc() is called cgroup_sk_alloc() thought it's in v2 mode, so it stores the cgroup pointer in sk->sk_cgrp_data and increments the cgroup refcnt, but then sock_update_netprioidx() thought it's in v1 mode, so it stores netprioidx value in sk->sk_cgrp_data, so the cgroup refcnt will never be freed. Currently we do the mode switch when someone writes to the ifpriomap cgroup control file. The easiest fix is to also do the switch when a task is attached to a new cgroup. Fixes: bd1060a1 ("sock, cgroup: add sock->sk_cgroup") Reported-by:
Yang Yingliang <yangyingliang@huawei.com> Tested-by:
Zefan Li <lizefan@huawei.com> Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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- 09 May, 2020 7 commits
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Arnd Bergmann authored
I ran into a randconfig build failure with CONFIG_FIXED_PHY=m and CONFIG_GIANFAR=y: x86_64-linux-ld: drivers/net/ethernet/freescale/gianfar.o:(.rodata+0x418): undefined reference to `fixed_phy_change_carrier' It seems the same thing can happen with dpaa and ucc_geth, so change all three to do an explicit 'select FIXED_PHY'. The fixed-phy driver actually has an alternative stub function that theoretically allows building network drivers when fixed-phy is disabled, but I don't see how that would help here, as the drivers presumably would not work then. Signed-off-by:
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Paolo Abeni authored
In commit b406472b ("net: ipv4: avoid mixed n_redirects and rate_tokens usage") I missed the fact that a 0 'rate_tokens' will bypass the backoff algorithm. Since rate_tokens is cleared after a redirect silence, and never incremented on redirects, if the host keeps receiving packets requiring redirect it will reply ignoring the backoff. Additionally, the 'rate_last' field will be updated with the cadence of the ingress packet requiring redirect. If that rate is high enough, that will prevent the host from generating any other kind of ICMP messages The check for a zero 'rate_tokens' value was likely a shortcut to avoid the more complex backoff algorithm after a redirect silence period. Address the issue checking for 'n_redirects' instead, which is incremented on successful redirect, and does not interfere with other ICMP replies. Fixes: b406472b ("net: ipv4: avoid mixed n_redirects and rate_tokens usage") Reported-and-tested-by:
Colin Walters <walters@redhat.com> Signed-off-by:
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Wei Yongjun authored
Fix to return negative error code -ENOMEM from the alloc failed error handling case instead of 0, as done elsewhere in this function. Fixes: 3184fb5b ("octeontx2-vf: Virtual function driver support") Reported-by:
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Vincent Minet authored
If a UMH process created by fork_usermode_blob() fails to execute, a pair of struct file allocated by umh_pipe_setup() will leak. Under normal conditions, the caller (like bpfilter) needs to manage the lifetime of the UMH and its two pipes. But when fork_usermode_blob() fails, the caller doesn't really have a way to know what needs to be done. It seems better to do the cleanup ourselves in this case. Fixes: 449325b5 ("umh: introduce fork_usermode_blob() helper") Signed-off-by:
Vincent Minet <v.minet@criteo.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfJakub Kicinski authored
Daniel Borkmann says: ==================== pull-request: bpf 2020-05-09 The following pull-request contains BPF updates for your *net* tree. We've added 4 non-merge commits during the last 9 day(s) which contain a total of 4 files changed, 11 insertions(+), 6 deletions(-). The main changes are: 1) Fix msg_pop_data() helper incorrectly setting an sge length in some cases as well as fixing bpf_tcp_ingress() wrongly accounting bytes in sg.size, from John Fastabend. 2) Fix to return an -EFAULT error when copy_to_user() of the value fails in map_lookup_and_delete_elem(), from Wei Yongjun. 3) Fix sk_psock refcnt leak in tcp_bpf_recvmsg(), from Xiyu Yang. ==================== Signed-off-by: -
Dan Carpenter authored
The "location" is controlled by the user via the ethtool_set_rxnfc() function. This update_cls_rule() function checks for array overflows but it doesn't check if the value is negative. I have changed the type to unsigned to prevent array underflows. Fixes: afb90dbb ("dpaa2-eth: Add ethtool support for flow classification") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Wei Yongjun authored
Fix to return negative error code -ENOMEM from the kzalloc() error handling case instead of 0, as done elsewhere in this function. Fixes: 174ab544 ("nfp: abm: add cls_u32 offload for simple band classification") Reported-by:
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