user/sven/linux.git/include, branch v6.1.82

x86/rfds: Mitigate Register File Data Sampling (RFDS)

2024-03-15T14:48:21Z

commit 8076fcde016c9c0e0660543e67bff86cb48a7c9c upstream. RFDS is a CPU vulnerability that may allow userspace to infer kernel stale data previously used in floating point registers, vector registers and integer registers. RFDS only affects certain Intel Atom processors. Intel released a microcode update that uses VERW instruction to clear the affected CPU buffers. Unlike MDS, none of the affected cores support SMT. Add RFDS bug infrastructure and enable the VERW based mitigation by default, that clears the affected buffers just before exiting to userspace. Also add sysfs reporting and cmdline parameter "reg_file_data_sampling" to control the mitigation. For details see: Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst Signed-off-by: Pawan Gupta Signed-off-by: Dave Hansen Reviewed-by: Thomas Gleixner Acked-by: Josh Poimboeuf Signed-off-by: Greg Kroah-Hartman

tracing/net_sched: Fix tracepoints that save qdisc_dev() as a string

2024-03-15T14:48:14Z

[ Upstream commit 51270d573a8d9dd5afdc7934de97d66c0e14b5fd ] I'm updating __assign_str() and will be removing the second parameter. To make sure that it does not break anything, I make sure that it matches the __string() field, as that is where the string is actually going to be saved in. To make sure there's nothing that breaks, I added a WARN_ON() to make sure that what was used in __string() is the same that is used in __assign_str(). In doing this change, an error was triggered as __assign_str() now expects the string passed in to be a char * value. I instead had the following warning: include/trace/events/qdisc.h: In function ‘trace_event_raw_event_qdisc_reset’: include/trace/events/qdisc.h:91:35: error: passing argument 1 of 'strcmp' from incompatible pointer type [-Werror=incompatible-pointer-types] 91 | __assign_str(dev, qdisc_dev(q)); That's because the qdisc_enqueue() and qdisc_reset() pass in qdisc_dev(q) to __assign_str() and to __string(). But that function returns a pointer to struct net_device and not a string. It appears that these events are just saving the pointer as a string and then reading it as a string as well. Use qdisc_dev(q)->name to save the device instead. Fixes: a34dac0b90552 ("net_sched: add tracepoints for qdisc_reset() and qdisc_destroy()") Signed-off-by: Steven Rostedt (Google) Reviewed-by: Jamal Hadi Salim Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

ceph: switch to corrected encoding of max_xattr_size in mdsmap

2024-03-15T14:48:13Z

[ Upstream commit 51d31149a88b5c5a8d2d33f06df93f6187a25b4c ] The addition of bal_rank_mask with encoding version 17 was merged into ceph.git in Oct 2022 and made it into v18.2.0 release normally. A few months later, the much delayed addition of max_xattr_size got merged, also with encoding version 17, placed before bal_rank_mask in the encoding -- but it didn't make v18.2.0 release. The way this ended up being resolved on the MDS side is that bal_rank_mask will continue to be encoded in version 17 while max_xattr_size is now encoded in version 18. This does mean that older kernels will misdecode version 17, but this is also true for v18.2.0 and v18.2.1 clients in userspace. The best we can do is backport this adjustment -- see ceph.git commit 78abfeaff27fee343fb664db633de5b221699a73 for details. [ idryomov: changelog ] Cc: stable@vger.kernel.org Link: https://tracker.ceph.com/issues/64440 Fixes: d93231a6bc8a ("ceph: prevent a client from exceeding the MDS maximum xattr size") Signed-off-by: Xiubo Li Reviewed-by: Patrick Donnelly Reviewed-by: Venky Shankar Signed-off-by: Ilya Dryomov Signed-off-by: Sasha Levin

bpf: Derive source IP addr via bpf_*_fib_lookup()

2024-03-06T14:45:20Z

commit dab4e1f06cabb6834de14264394ccab197007302 upstream. Extend the bpf_fib_lookup() helper by making it to return the source IPv4/IPv6 address if the BPF_FIB_LOOKUP_SRC flag is set. For example, the following snippet can be used to derive the desired source IP address: struct bpf_fib_lookup p = { .ipv4_dst = ip4->daddr }; ret = bpf_skb_fib_lookup(skb, p, sizeof(p), BPF_FIB_LOOKUP_SRC | BPF_FIB_LOOKUP_SKIP_NEIGH); if (ret != BPF_FIB_LKUP_RET_SUCCESS) return TC_ACT_SHOT; /* the p.ipv4_src now contains the source address */ The inability to derive the proper source address may cause malfunctions in BPF-based dataplanes for hosts containing netdevs with more than one routable IP address or for multi-homed hosts. For example, Cilium implements packet masquerading in BPF. If an egressing netdev to which the Cilium's BPF prog is attached has multiple IP addresses, then only one [hardcoded] IP address can be used for masquerading. This breaks connectivity if any other IP address should have been selected instead, for example, when a public and private addresses are attached to the same egress interface. The change was tested with Cilium [1]. Nikolay Aleksandrov helped to figure out the IPv6 addr selection. [1]: https://github.com/cilium/cilium/pull/28283 Signed-off-by: Martynas Pumputis Link: https://lore.kernel.org/r/20231007081415.33502-2-m@lambda.lt Signed-off-by: Martin KaFai Lau Signed-off-by: Daniel Borkmann Signed-off-by: Greg Kroah-Hartman

bpf: Add table ID to bpf_fib_lookup BPF helper

2024-03-06T14:45:20Z

commit 8ad77e72caae22a1ddcfd0c03f2884929e93b7a4 upstream. Add ability to specify routing table ID to the `bpf_fib_lookup` BPF helper. A new field `tbid` is added to `struct bpf_fib_lookup` used as parameters to the `bpf_fib_lookup` BPF helper. When the helper is called with the `BPF_FIB_LOOKUP_DIRECT` and `BPF_FIB_LOOKUP_TBID` flags the `tbid` field in `struct bpf_fib_lookup` will be used as the table ID for the fib lookup. If the `tbid` does not exist the fib lookup will fail with `BPF_FIB_LKUP_RET_NOT_FWDED`. The `tbid` field becomes a union over the vlan related output fields in `struct bpf_fib_lookup` and will be zeroed immediately after usage. This functionality is useful in containerized environments. For instance, if a CNI wants to dictate the next-hop for traffic leaving a container it can create a container-specific routing table and perform a fib lookup against this table in a "host-net-namespace-side" TC program. This functionality also allows `ip rule` like functionality at the TC layer, allowing an eBPF program to pick a routing table based on some aspect of the sk_buff. As a concrete use case, this feature will be used in Cilium's SRv6 L3VPN datapath. When egress traffic leaves a Pod an eBPF program attached by Cilium will determine which VRF the egress traffic should target, and then perform a FIB lookup in a specific table representing this VRF's FIB. Signed-off-by: Louis DeLosSantos Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20230505-bpf-add-tbid-fib-lookup-v2-1-0a31c22c748c@gmail.com Signed-off-by: Greg Kroah-Hartman

block: define bvec_iter as packed aligned(4)

2024-03-06T14:45:19Z

[ Upstream commit 7838b4656110d950afdd92a081cc0f33e23e0ea8 ] In commit 19416123ab3e ("block: define 'struct bvec_iter' as packed"), what we need is to save the 4byte padding, and avoid `bio` to spread on one extra cache line. It is enough to define it as '__packed __aligned(4)', as '__packed' alone means byte aligned, and can cause compiler to generate horrible code on architectures that don't support unaligned access in case that bvec_iter is embedded in other structures. Cc: Mikulas Patocka Suggested-by: Linus Torvalds Fixes: 19416123ab3e ("block: define 'struct bvec_iter' as packed") Signed-off-by: Ming Lei Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin

efi/libstub: Add memory attribute protocol definitions

2024-03-06T14:45:18Z

From: Evgeniy Baskov [ Commit 79729f26b074a5d2722c27fa76cc45ef721e65cd upstream ] EFI_MEMORY_ATTRIBUTE_PROTOCOL servers as a better alternative to DXE services for setting memory attributes in EFI Boot Services environment. This protocol is better since it is a part of UEFI specification itself and not UEFI PI specification like DXE services. Add EFI_MEMORY_ATTRIBUTE_PROTOCOL definitions. Support mixed mode properly for its calls. Tested-by: Mario Limonciello Signed-off-by: Evgeniy Baskov Signed-off-by: Ard Biesheuvel Signed-off-by: Greg Kroah-Hartman

NFSD: add CB_RECALL_ANY tracepoints

2024-03-06T14:45:17Z

[ Upstream commit 638593be55c0b37a1930038460a9918215d5c24b ] Add tracepoints to trace start and end of CB_RECALL_ANY operation. Signed-off-by: Dai Ngo [ cel: added show_rca_mask() macro ] Signed-off-by: Chuck Lever Signed-off-by: Greg Kroah-Hartman

NFSD: add delegation reaper to react to low memory condition

2024-03-06T14:45:17Z

[ Upstream commit 44df6f439a1790a5f602e3842879efa88f346672 ] The delegation reaper is called by nfsd memory shrinker's on the 'count' callback. It scans the client list and sends the courtesy CB_RECALL_ANY to the clients that hold delegations. To avoid flooding the clients with CB_RECALL_ANY requests, the delegation reaper sends only one CB_RECALL_ANY request to each client per 5 seconds. Signed-off-by: Dai Ngo [ cel: moved definition of RCA4_TYPE_MASK_RDATA_DLG ] Signed-off-by: Chuck Lever Signed-off-by: Greg Kroah-Hartman

trace: Relocate event helper files

2024-03-06T14:45:17Z

[ Upstream commit 247c01ff5f8d66e62a404c91733be52fecb8b7f6 ] Steven Rostedt says: > The include/trace/events/ directory should only hold files that > are to create events, not headers that hold helper functions. > > Can you please move them out of include/trace/events/ as that > directory is "special" in the creation of events. Signed-off-by: Chuck Lever Acked-by: Leon Romanovsky Acked-by: Steven Rostedt (Google) Acked-by: Anna Schumaker Stable-dep-of: 638593be55c0 ("NFSD: add CB_RECALL_ANY tracepoints") Signed-off-by: Chuck Lever Signed-off-by: Greg Kroah-Hartman

user/sven/linux.git/include, branch v6.1.82

x86/rfds: Mitigate Register File Data Sampling (RFDS)

tracing/net_sched: Fix tracepoints that save qdisc_dev() as a string

ceph: switch to corrected encoding of max_xattr_size in mdsmap

bpf: Derive source IP addr via bpf_*_fib_lookup()

bpf: Add table ID to bpf_fib_lookup BPF helper

block: define bvec_iter as __packed __aligned(4)

efi/libstub: Add memory attribute protocol definitions

NFSD: add CB_RECALL_ANY tracepoints

NFSD: add delegation reaper to react to low memory condition

trace: Relocate event helper files

block: define bvec_iter as packed aligned(4)