- 20 Feb, 2023 35 commits
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Chuck Lever authored
Replace finicky logic: Instead of trying to find scratch space in the response buffer, use the scratch buffer from struct gss_svc_data. Reviewed-by:
Jeff Layton <jlayton@kernel.org> Signed-off-by:
Chuck Lever <chuck.lever@oracle.com>
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Chuck Lever authored
An error computing the checksum here is an exceptional event. Reviewed-by:
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Chuck Lever authored
Clean up: To help orient readers, name the stack variables to match the XDR field names. Additionally, the explicit type cast on @gsd is unnecessary; and @resbuf is renamed to match the variable naming in the unwrap functions. Reviewed-by:
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Chuck Lever authored
Now that upper layers use an xdr_stream to track the construction of each RPC Reply message, resbuf->len is kept up-to-date automatically. There's no need to recompute it in svc_gss_release(). Reviewed-by:
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Jeff Layton authored
The WARN_ON_ONCE check is not terribly useful. It also seems possible for nfs4_find_file to race with the destruction of an fi_deleg_file while trying to take a reference to it. Now that it's safe to pass nfs_get_file a NULL pointer, remove the WARN and NULL pointer check. Take the fi_lock when fetching fi_deleg_file. Cc: NeilBrown <neilb@suse.de> Signed-off-by:
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Jeff Layton authored
...and remove some now-useless NULL pointer checks in its callers. Suggested-by:
NeilBrown <neilb@suse.de> Signed-off-by:
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Dai Ngo authored
Currently nfsd4_setup_inter_ssc returns the vfsmount of the source server's export when the mount completes. After the copy is done nfsd4_cleanup_inter_ssc is called with the vfsmount of the source server and it searches nfsd_ssc_mount_list for a matching entry to do the clean up. The problems with this approach are (1) the need to search the nfsd_ssc_mount_list and (2) the code has to handle the case where the matching entry is not found which looks ugly. The enhancement is instead of nfsd4_setup_inter_ssc returning the vfsmount, it returns the nfsd4_ssc_umount_item which has the vfsmount embedded in it. When nfsd4_cleanup_inter_ssc is called it's passed with the nfsd4_ssc_umount_item directly to do the clean up so no searching is needed and there is no need to handle the 'not found' case. Signed-off-by:
Dai Ngo <dai.ngo@oracle.com> Signed-off-by:
Olga Kornievskaia <kolga@netapp.com>
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Chuck Lever authored
Now the entire RPC Call header parsing path is handled via struct xdr_stream-based decoders. Reviewed-by:
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Chuck Lever authored
Clean up: With xdr_stream decoding, the @argv parameter is no longer used. Reviewed-by:
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Chuck Lever authored
Done as part of hardening the server-side RPC header decoding path. Reviewed-by:
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Chuck Lever authored
Clean up: Saving the RPC program number in two places is unnecessary. Reviewed-by:
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Chuck Lever authored
Clean up: Group these together for legibility. Reviewed-by:
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Chuck Lever authored
Now that each ->accept method has been converted to use xdr_stream, the svcxdr_init_decode() calls can be hoisted back up into the generic RPC server code. The dprintk in svc_authenticate() is removed, since trace_svc_authenticate() reports the same information. Reviewed-by:
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Chuck Lever authored
Done as part of hardening the server-side RPC header decoding path. Reviewed-by:
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Chuck Lever authored
Micro-optimizations: 1. The value of rqstp->rq_auth_stat is replaced no matter which arm of the switch is taken, so the initial assignment can be safely removed. 2. Avoid checking the value of gc->gc_proc twice in the I/O (RPC_GSS_PROC_DATA) path. The cost is a little extra code redundancy. Reviewed-by:
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Chuck Lever authored
Done as part of hardening the server-side RPC header decoding path. Reviewed-by:
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Chuck Lever authored
Done as part of hardening the server-side RPC header decoding path. Reviewed-by:
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Chuck Lever authored
Clean up: To help orient readers, name the stack variables to match the XDR field names. Reviewed-by:
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Chuck Lever authored
Done as part of hardening the server-side RPC header decoding path. Reviewed-by:
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Chuck Lever authored
Clean up: To help orient readers, name the stack variables to match the XDR field names. For readability, I'm also going to rename the unwrap and wrap functions in a consistent manner, starting with unwrap_integ_data(). Reviewed-by:
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Chuck Lever authored
Clean up / code de-duplication - this functionality is already available in the generic XDR layer. Reviewed-by:
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Chuck Lever authored
The entire RPC_GSS_PROC_INIT path is converted over to xdr_stream for decoding the Call credential and verifier. Done as part of hardening the server-side RPC header decoding path. Reviewed-by:
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Chuck Lever authored
gss_read_verf() is already short. Fold it into its only caller. Reviewed-by:
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Chuck Lever authored
gss_read_common_verf() is now just a wrapper for dup_netobj(), thus it can be replaced with direct calls to dup_netobj(). Reviewed-by:
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Chuck Lever authored
Pre-requisite to replacing gss_read_common_verf(). Reviewed-by:
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Chuck Lever authored
Since upcalls are infrequent, ensure the compiler places the upcall mechanism out-of-line from the I/O path. Reviewed-by:
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Chuck Lever authored
Done as part of hardening the server-side RPC header decoding path. Reviewed-by:
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Chuck Lever authored
Done as part of hardening the server-side RPC header decoding path. Since the server-side of the Linux kernel SunRPC implementation ignores the contents of the Call's machinename field, there's no need for its RPC_AUTH_UNIX authenticator to reject names that are larger than UNX_MAXNODENAME. Reviewed-by:
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Chuck Lever authored
Done as part of hardening the server-side RPC header decoding path. Reviewed-by:
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Chuck Lever authored
RFC 5531 defines the body of an RPC Call message like this: struct call_body { unsigned int rpcvers; unsigned int prog; unsigned int vers; unsigned int proc; opaque_auth cred; opaque_auth verf; /* procedure-specific parameters start here */ }; In the current server code, decoding a struct opaque_auth type is open-coded in several places, and is thus difficult to harden everywhere. Introduce a helper for decoding an opaque_auth within the context of a xdr_stream. This helper can be shared with all authentication flavor implemenations, even on the client-side. Done as part of hardening the server-side RPC header decoding paths. Reviewed-by: -
Chuck Lever authored
Refactor: So that the overhaul of each ->accept method can be done in separate smaller patches, temporarily move the svcxdr_init_decode() call into those methods. Reviewed-by:
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Chuck Lever authored
Now that all vs_dispatch functions invoke svcxdr_init_decode(), it is common code and can be pushed down into the generic RPC server. Reviewed-by:
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Richard Weinberger authored
Now with NFSD being able to cross into auto mounts, the check can be removed. Signed-off-by:
Richard Weinberger <richard@nod.at> Reviewed-by:
Ian Kent <raven@themaw.net> Reviewed-by:
Anna Schumaker <Anna.Schumaker@Netapp.com>
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Richard Weinberger authored
This function is only used by NFSD to cross mount points. If a mount point is of type auto mount, follow_down() will not uncover it. Add LOOKUP_AUTOMOUNT to the lookup flags to have ->d_automount() called when NFSD walks down the mount tree. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Richard Weinberger authored
Currently nfsd_mountpoint() tests for mount points using d_mountpoint(), this works only when a mount point is already uncovered. In our case the mount point is of type auto mount and can be coverted. i.e. ->d_automount() was not called. Using d_managed() nfsd_mountpoint() can test whether a mount point is either already uncovered or can be uncovered later. Signed-off-by:
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- 19 Feb, 2023 4 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fix from Thomas Gleixner: "A single fix for x86. Revert the recent change to the MTRR code which aimed to support SEV-SNP guests on Hyper-V. It caused a regression on XEN Dom0 kernels. The underlying issue of MTTR (mis)handling in the x86 code needs some deeper investigation and is definitely not 6.2 material" * tag 'x86-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mtrr: Revert 90b926e6 ("x86/pat: Fix pat_x_mtrr_type() for MTRR disabled case")
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fix from Thomas Gleixner: "A fix for a long standing issue in the alarmtimer code. Posix-timers armed with a short interval with an ignored signal result in an unpriviledged DoS. Due to the ignored signal the timer switches into self rearm mode. This issue had been "fixed" before but a rework of the alarmtimer code 5 years ago lost that workaround. There is no real good solution for this issue, which is also worked around in the core posix-timer code in the same way, but it certainly moved way up on the ever growing todo list" * tag 'timers-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: alarmtimer: Prevent starvation by small intervals and SIG_IGN
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq fix from Thomas Gleixner: "A single build fix for the PCI/MSI infrastructure. The addition of the new alloc/free interfaces in this cycle forgot to add stub functions for pci_msix_alloc_irq_at() and pci_msix_free_irq() for the CONFIG_PCI_MSI=n case" * tag 'irq-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: PCI/MSI: Provide missing stubs for CONFIG_PCI_MSI=n
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- 18 Feb, 2023 1 commit
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull kvm/x86 fixes from Paolo Bonzini: - zero all padding for KVM_GET_DEBUGREGS - fix rST warning - disable vPMU support on hybrid CPUs * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: kvm: initialize all of the kvm_debugregs structure before sending it to userspace perf/x86: Refuse to export capabilities for hybrid PMUs KVM: x86/pmu: Disable vPMU support on hybrid CPUs (host PMUs) Documentation/hw-vuln: Fix rST warning
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