- 09 2月, 2018 2 次提交
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由 Amir Goldstein 提交于
The values of stat->mtime and inode->i_mtime may differ for overlayfs and stat->mtime is the correct value to use when encoding getattr. This is also consistent with the fact that other attr times are also encoded from stat values. Both callers of lease_get_mtime() already have the value of stat->mtime, so the only needed change is that lease_get_mtime() will not overwrite this value with inode->i_mtime in case the inode does not have an exclusive lease. Signed-off-by: NAmir Goldstein <amir73il@gmail.com> Reviewed-by: NJeff Layton <jlayton@kernel.org> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 J. Bruce Fields 提交于
A client that sends more than a hundred ops in a single compound currently gets an rpc-level GARBAGE_ARGS error. It would be more helpful to return NFS4ERR_RESOURCE, since that gives the client a better idea how to recover (for example by splitting up the compound into smaller compounds). This is all a bit academic since we've never actually seen a reason for clients to send such long compounds, but we may as well fix it. While we're there, just use NFSD4_MAX_OPS_PER_COMPOUND == 16, the constant we already use in the 4.1 case, instead of hard-coding 100. Chances anyone actually uses even 16 ops per compound are small enough that I think there's a neglible risk or any regression. This fixes pynfs test COMP6. Reported-by: N"Lu, Xinyu" <luxy.fnst@cn.fujitsu.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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- 06 2月, 2018 3 次提交
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由 J. Bruce Fields 提交于
There's no point I can see to stp->st_stid.sc_type = NFS4_CLOSED_STID; given release_lock_stateid immediately sets sc_type to 0. That set of sc_type to 0 should be enough to prevent it being used where we don't want it to be; NFS4_CLOSED_STID should only be needed for actual open stateid's that are actually closed. Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
The state of the stid is guaranteed by 2 locks: - The nfs4_client 'cl_lock' spinlock - The nfs4_ol_stateid 'st_mutex' mutex so it is quite possible for the stid to be unhashed after lookup, but before calling nfsd4_lock_ol_stateid(). So we do need to check for a zero value for 'sc_type' in nfsd4_verify_open_stid(). Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Tested-by: NChecuk Lever <chuck.lever@oracle.com> Cc: stable@vger.kernel.org Fixes: 659aefb6 "nfsd: Ensure we don't recognise lock stateids..." Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Christoph Hellwig 提交于
Setting values in struct sock directly is the usual method. Remove the long dead code using set_fs() and the related comment. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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- 19 1月, 2018 1 次提交
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由 Chuck Lever 提交于
This change improves Receive efficiency by posting Receives only on the same CPU that handles Receive completion. Improved latency and throughput has been noted with this change. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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- 22 12月, 2017 4 次提交
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由 Benjamin Coddington 提交于
Clients must be able to read a file in order to execute it, and for pNFS that means the client needs to be able to perform a LAYOUTGET on the file. This behavior for executable-only files was added for OPEN in commit a043226b "nfsd4: permit read opens of executable-only files". This fixes up xfstests generic/126 on block/scsi layouts. Signed-off-by: NBenjamin Coddington <bcodding@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Elena Reshetova 提交于
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basic atomic operations (set, inc, inc_not_zero, dec_and_test, etc.) Such atomic variables should be converted to a newly provided refcount_t type and API that prevents accidental counter overflows and underflows. This is important since overflows and underflows can lead to use-after-free situation and be exploitable. The variable nlm_rqst.a_count is used as pure reference counter. Convert it to refcount_t and fix up the operations. **Important note for maintainers: Some functions from refcount_t API defined in lib/refcount.c have different memory ordering guarantees than their atomic counterparts. The full comparison can be seen in https://lkml.org/lkml/2017/11/15/57 and it is hopefully soon in state to be merged to the documentation tree. Normally the differences should not matter since refcount_t provides enough guarantees to satisfy the refcounting use cases, but in some rare cases it might matter. Please double check that you don't have some undocumented memory guarantees for this variable usage. For the nlm_rqst.a_count it might make a difference in following places: - nlmclnt_release_call() and nlmsvc_release_call(): decrement in refcount_dec_and_test() only provides RELEASE ordering and control dependency on success vs. fully ordered atomic counterpart Suggested-by: NKees Cook <keescook@chromium.org> Reviewed-by: NDavid Windsor <dwindsor@gmail.com> Reviewed-by: NHans Liljestrand <ishkamiel@gmail.com> Signed-off-by: NElena Reshetova <elena.reshetova@intel.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Elena Reshetova 提交于
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basic atomic operations (set, inc, inc_not_zero, dec_and_test, etc.) Such atomic variables should be converted to a newly provided refcount_t type and API that prevents accidental counter overflows and underflows. This is important since overflows and underflows can lead to use-after-free situation and be exploitable. The variable nlm_lockowner.count is used as pure reference counter. Convert it to refcount_t and fix up the operations. **Important note for maintainers: Some functions from refcount_t API defined in lib/refcount.c have different memory ordering guarantees than their atomic counterparts. The full comparison can be seen in https://lkml.org/lkml/2017/11/15/57 and it is hopefully soon in state to be merged to the documentation tree. Normally the differences should not matter since refcount_t provides enough guarantees to satisfy the refcounting use cases, but in some rare cases it might matter. Please double check that you don't have some undocumented memory guarantees for this variable usage. For the nlm_lockowner.count it might make a difference in following places: - nlm_put_lockowner(): decrement in refcount_dec_and_lock() only provides RELEASE ordering, control dependency on success and holds a spin lock on success vs. fully ordered atomic counterpart. No changes in spin lock guarantees. Suggested-by: NKees Cook <keescook@chromium.org> Reviewed-by: NDavid Windsor <dwindsor@gmail.com> Reviewed-by: NHans Liljestrand <ishkamiel@gmail.com> Signed-off-by: NElena Reshetova <elena.reshetova@intel.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Elena Reshetova 提交于
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basic atomic operations (set, inc, inc_not_zero, dec_and_test, etc.) Such atomic variables should be converted to a newly provided refcount_t type and API that prevents accidental counter overflows and underflows. This is important since overflows and underflows can lead to use-after-free situation and be exploitable. The variable nsm_handle.sm_count is used as pure reference counter. Convert it to refcount_t and fix up the operations. **Important note for maintainers: Some functions from refcount_t API defined in lib/refcount.c have different memory ordering guarantees than their atomic counterparts. The full comparison can be seen in https://lkml.org/lkml/2017/11/15/57 and it is hopefully soon in state to be merged to the documentation tree. Normally the differences should not matter since refcount_t provides enough guarantees to satisfy the refcounting use cases, but in some rare cases it might matter. Please double check that you don't have some undocumented memory guarantees for this variable usage. For the nsm_handle.sm_count it might make a difference in following places: - nsm_release(): decrement in refcount_dec_and_lock() only provides RELEASE ordering, control dependency on success and holds a spin lock on success vs. fully ordered atomic counterpart. No change for the spin lock guarantees. Suggested-by: NKees Cook <keescook@chromium.org> Reviewed-by: NDavid Windsor <dwindsor@gmail.com> Reviewed-by: NHans Liljestrand <ishkamiel@gmail.com> Signed-off-by: NElena Reshetova <elena.reshetova@intel.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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- 28 11月, 2017 23 次提交
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由 Vasily Averin 提交于
restart_grace() uses hardcoded init_net. It can cause to "list_add double add" in following scenario: 1) nfsd and lockd was started in several net namespaces 2) nfsd in init_net was stopped (lockd was not stopped because it have users from another net namespaces) 3) lockd got signal, called restart_grace() -> set_grace_period() and enabled lock_manager in hardcoded init_net. 4) nfsd in init_net is started again, its lockd_up() calls set_grace_period() and tries to add lock_manager into init_net 2nd time. Jeff Layton suggest: "Make it safe to call locks_start_grace multiple times on the same lock_manager. If it's already on the global grace_list, then don't try to add it again. (But we don't intentionally add twice, so for now we WARN about that case.) With this change, we also need to ensure that the nfsd4 lock manager initializes the list before we call locks_start_grace. While we're at it, move the rest of the nfsd_net initialization into nfs4_state_create_net. I see no reason to have it spread over two functions like it is today." Suggested patch was updated to generate warning in described situation. Suggested-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Vasily Averin 提交于
nlm_complain_hosts() walks through nlm_server_hosts hlist, which should be protected by nlm_host_mutex. Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Reviewed-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Vasily Averin 提交于
nfsd_inet[6]addr_event uses nn->nfsd_serv without taking nfsd_mutex, which can be changed during execution of notifiers and crash the host. Moreover if notifiers were enabled in one net namespace they are enabled in all other net namespaces, from creation until destruction. This patch allows notifiers to access nn->nfsd_serv only after the pointer is correctly initialized and delays cleanup until notifiers are no longer in use. Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Tested-by: NScott Mayhew <smayhew@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Vasily Averin 提交于
lockd_inet[6]addr_event use nlmsvc_rqst without taken nlmsvc_mutex, nlmsvc_rqst can be changed during execution of notifiers and crash the host. Patch enables access to nlmsvc_rqst only when it was correctly initialized and delays its cleanup until notifiers are no longer in use. Note that nlmsvc_rqst can be temporally set to ERR_PTR, so the "if (nlmsvc_rqst)" check in notifiers is insufficient on its own. Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Tested-by: NScott Mayhew <smayhew@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Bhumika Goyal 提交于
Make these const as they are only getting passed to the function cache_create_net having the argument as const. Signed-off-by: NBhumika Goyal <bhumirks@gmail.com> Reviewed-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Bhumika Goyal 提交于
Make these const as they are only getting passed to the function cache_create_net having the argument as const. Signed-off-by: NBhumika Goyal <bhumirks@gmail.com> Reviewed-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Bhumika Goyal 提交于
Make the struct cache_detail *tmpl argument of the function cache_create_net as const as it is only getting passed to kmemup having the argument as const void *. Add const to the prototype too. Signed-off-by: NBhumika Goyal <bhumirks@gmail.com> Reviewed-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Andrew Elble 提交于
Prevent the use of the closed (invalid) special stateid by clients. Signed-off-by: NAndrew Elble <aweits@rit.edu> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Naofumi Honda 提交于
From kernel 4.9, my two nfsv4 servers sometimes suffer from "panic: unable to handle kernel page request" in posix_unblock_lock() called from nfs4_laundromat(). These panics diseappear if we revert the commit "nfsd: add a LRU list for blocked locks". The cause appears to be a typo in nfs4_laundromat(), which is also present in nfs4_state_shutdown_net(). Cc: stable@vger.kernel.org Fixes: 7919d0a2 "nfsd: add a LRU list for blocked locks" Cc: jlayton@redhat.com Reveiwed-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Vasily Averin 提交于
Commit efda760f ("lockd: fix lockd shutdown race") is incorrect, it removes lockd_manager and disarm grace_period_end for init_net only. If nfsd was started from another net namespace lockd_up_net() calls set_grace_period() that adds lockd_manager into per-netns list and queues grace_period_end delayed work. These action should be reverted in lockd_down_net(). Otherwise it can lead to double list_add on after restart nfsd in netns, and to use-after-free if non-disarmed delayed work will be executed after netns destroy. Fixes: efda760f ("lockd: fix lockd shutdown race") Cc: stable@vger.kernel.org Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Vasily Averin 提交于
Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Vasily Averin 提交于
Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Andrew Elble 提交于
The use of the st_mutex has been confusing the validator. Use the proper nested notation so as to not produce warnings. Signed-off-by: NAndrew Elble <aweits@rit.edu> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Vasily Averin 提交于
Publishing of net pointer is not safe, use net->ns.inum as net ID in debug messages [ 171.757678] lockd_up_net: per-net data created; net=f00001e7 [ 171.767188] NFSD: starting 90-second grace period (net f00001e7) [ 300.653313] lockd: nuking all hosts in net f00001e7... [ 300.653641] lockd: host garbage collection for net f00001e7 [ 300.653968] lockd: nlmsvc_mark_resources for net f00001e7 [ 300.711483] lockd_down_net: per-net data destroyed; net=f00001e7 [ 300.711847] lockd: nuking all hosts in net 0... [ 300.711847] lockd: host garbage collection for net 0 [ 300.711848] lockd: nlmsvc_mark_resources for net 0 Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Vasily Averin 提交于
Publishing of net pointer is not safe, replace it in debug meesages by net->ns.inum [ 119.989161] nfsd: initializing export module (net: f00001e7). [ 171.767188] NFSD: starting 90-second grace period (net f00001e7) [ 322.185240] nfsd: shutting down export module (net: f00001e7). [ 322.186062] nfsd: export shutdown complete (net: f00001e7). Signed-off-by: NVasily Averin <vvs@virtuozzo.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
The various functions that call check_stateid_generation() in order to compare a client-supplied stateid with the nfs4_stid state, usually need to atomically check for closed state. Those that perform the check after locking the st_mutex using nfsd4_lock_ol_stateid() should now be OK, but we do want to fix up the others. Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
After taking the stateid st_mutex, we want to know that the stateid still represents valid state before performing any non-idempotent actions. Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
If we're looking up a new lock state, and the creation fails, then we want to unhash it, just like we do for OPEN. However in order to do so, we need to that no other LOCK requests can grab the mutex until we have unhashed it (and marked it as closed). Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
Trivial cleanup to simplify following patch. Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
In order to deal with lookup races, nfsd4_free_lock_stateid() needs to be able to signal to other stateful functions that the lock stateid is no longer valid. Right now, nfsd_lock() will check whether or not an existing stateid is still hashed, but only in the "new lock" path. To ensure the stateid invalidation is also recognised by the "existing lock" path, and also by a second call to nfsd4_free_lock_stateid() itself, we can change the type to NFS4_CLOSED_STID under the stp->st_mutex. Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
If nfsd4_process_open2() is initialising a new stateid, and yet the call to nfs4_get_vfs_file() fails for some reason, then we must declare the stateid closed, and unhash it before dropping the mutex. Right now, we unhash the stateid after dropping the mutex, and without changing the stateid type, meaning that another OPEN could theoretically look it up and attempt to use it. Reported-by: NAndrew W Elble <aweits@rit.edu> Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Cc: stable@vger.kernel.org Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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由 Trond Myklebust 提交于
Open file stateids can linger on the nfs4_file list of stateids even after they have been closed. In order to avoid reusing such a stateid, and confusing the client, we need to recheck the nfs4_stid's type after taking the mutex. Otherwise, we risk reusing an old stateid that was already closed, which will confuse clients that expect new stateids to conform to RFC7530 Sections 9.1.4.2 and 16.2.5 or RFC5661 Sections 8.2.2 and 18.2.4. Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com> Cc: stable@vger.kernel.org Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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- 27 11月, 2017 7 次提交
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由 Linus Torvalds 提交于
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git://git.armlinux.org.uk/~rmk/linux-arm由 Linus Torvalds 提交于
Pull ARM fixes from Russell King: - LPAE fixes for kernel-readonly regions - Fix for get_user_pages_fast on LPAE systems - avoid tying decompressor to a particular platform if DEBUG_LL is enabled - BUG if we attempt to return to userspace but the to-be-restored PSR value keeps us in privileged mode (defeating an issue that ftracetest found) * 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: BUG if jumping to usermode address in kernel mode ARM: 8722/1: mm: make STRICT_KERNEL_RWX effective for LPAE ARM: 8721/1: mm: dump: check hardware RO bit for LPAE ARM: make decompressor debug output user selectable ARM: fix get_user_pages_fast
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull irq fixes from Thomas Glexiner: - unbreak the irq trigger type check for legacy platforms - a handful fixes for ARM GIC v3/4 interrupt controllers - a few trivial fixes all over the place * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq/matrix: Make - vs ?: Precedence explicit irqchip/imgpdc: Use resource_size function on resource object irqchip/qcom: Fix u32 comparison with value less than zero irqchip/exiu: Fix return value check in exiu_init() irqchip/gic-v3-its: Remove artificial dependency on PCI irqchip/gic-v4: Add forward definition of struct irq_domain_ops irqchip/gic-v3: pr_err() strings should end with newlines irqchip/s3c24xx: pr_err() strings should end with newlines irqchip/gic-v3: Fix ppi-partitions lookup irqchip/gic-v4: Clear IRQ_DISABLE_UNLAZY again if mapping fails genirq: Track whether the trigger type has been set
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull misc x86 fixes from Ingo Molnar: - topology enumeration fixes - KASAN fix - two entry fixes (not yet the big series related to KASLR) - remove obsolete code - instruction decoder fix - better /dev/mem sanity checks, hopefully working better this time - pkeys fixes - two ACPI fixes - 5-level paging related fixes - UMIP fixes that should make application visible faults more debuggable - boot fix for weird virtualization environment * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) x86/decoder: Add new TEST instruction pattern x86/PCI: Remove unused HyperTransport interrupt support x86/umip: Fix insn_get_code_seg_params()'s return value x86/boot/KASLR: Remove unused variable x86/entry/64: Add missing irqflags tracing to native_load_gs_index() x86/mm/kasan: Don't use vmemmap_populate() to initialize shadow x86/entry/64: Fix entry_SYSCALL_64_after_hwframe() IRQ tracing x86/pkeys/selftests: Fix protection keys write() warning x86/pkeys/selftests: Rename 'si_pkey' to 'siginfo_pkey' x86/mpx/selftests: Fix up weird arrays x86/pkeys: Update documentation about availability x86/umip: Print a warning into the syslog if UMIP-protected instructions are used x86/smpboot: Fix __max_logical_packages estimate x86/topology: Avoid wasting 128k for package id array perf/x86/intel/uncore: Cache logical pkg id in uncore driver x86/acpi: Reduce code duplication in mp_override_legacy_irq() x86/acpi: Handle SCI interrupts above legacy space gracefully x86/boot: Fix boot failure when SMP MP-table is based at 0 x86/mm: Limit mmap() of /dev/mem to valid physical addresses x86/selftests: Add test for mapping placement for 5-level paging ...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull scheduler fixes from Ingo Molnar: "Misc fixes: a documentation fix, a Sparse warning fix and a debugging fix" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/debug: Fix task state recording/printout sched/deadline: Don't use dubious signed bitfields sched/deadline: Fix the description of runtime accounting in the documentation
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull perf fixes from Ingo Molnar: "Misc fixes: two PMU driver fixes and a memory leak fix" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/core: Fix memory leak triggered by perf --namespace perf/x86/intel/uncore: Add event constraint for BDX PCU perf/x86/intel: Hide TSX events when RTM is not supported
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull static key fix from Ingo Molnar: "Fix a boot warning related to bad init ordering of the static keys self-test" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: jump_label: Invoke jump_label_test() via early_initcall()
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