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PiperOrigin-RevId: 337919424
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Reported-by: syzbot+0268cc591c0f517a1de0@syzkaller.appspotmail.com
PiperOrigin-RevId: 337901664
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This change makes the following changes:
- Unlocks MemoryFile.mu while calling mincore (checkCommitted) because mincore
can take a really long time. Accordingly looks up the segment in the tree
tree again and handles changes to the segment.
- MemoryFile.UpdateUsage() can now only be called at frequency at most 100Hz.
100 Hz = linux.CLOCKS_PER_SEC.
Co-authored-by: Jamie Liu <jamieliu@google.com>
PiperOrigin-RevId: 337865250
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Before this change, if a link header was included in an incoming packet
that is forwarded, the packet that gets sent out will take the original
packet and add a link header to it while keeping the old link header.
This would make the sent packet look like:
OUTGOING LINK HDR | INCOMING LINK HDR | NETWORK HDR | ...
Obviously this is incorrect as we should drop the incoming link header
and only include the outgoing link header. This change fixes this bug.
Test: integration_test.TestForwarding
PiperOrigin-RevId: 337571447
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The IPv4 header checksum has not been checked, at least in recent times,
so add code to do so. Fix all the tests that fail because they never
needed to set the checksum.
Fixes #4484
PiperOrigin-RevId: 337556243
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Currently, fragmentation can only occur during WritePacket(). This enables
it for WritePackets() and WriteIncludedHeaderPacket() as well.
IPv4 unit tests were refactored to be consistent with the IPv6 unit tests.
This removes the extraHeaderReserveLength field and the related
"prependable bytes" unit tests (for both IPv4 and IPv6) because it was only
testing a panic condition when the value was too low.
Fixes #3796
PiperOrigin-RevId: 337550061
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PiperOrigin-RevId: 337544656
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Allow writing an IPv6 packet where the IPv6 header is a provided by
the user.
* Introduce an error to let callers know a header is malformed.
We previously useed tcpip.ErrInvalidOptionValue but that did not seem
appropriate for generic malformed header errors.
* Populate network header in WriteHeaderIncludedPacket
IPv4's implementation of WriteHeaderIncludedPacket did not previously
populate the packet buffer's network header. This change fixes that.
Fixes #4527
Test: ip_test.TestWriteHeaderIncludedPacket
PiperOrigin-RevId: 337534548
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Reported-by: syzbot+5466463b7604c2902875@syzkaller.appspotmail.com
PiperOrigin-RevId: 337451896
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RFC 4861 section 4.4 comments the Target link-layer address option is sometimes
optional in a Neighbor Advertisement packet:
"When responding to a unicast Neighbor Solicitation this option SHOULD be
included."
Tests:
pkg/tcpip/stack:stack_test
- TestEntryStaleToReachableWhenSolicitedConfirmationWithoutAddress
- TestEntryDelayToReachableWhenSolicitedConfirmationWithoutAddress
- TestEntryProbeToReachableWhenSolicitedConfirmationWithoutAddress
pkg/tcpip/network/ipv6:ipv6_test
- TestCallsToNeighborCache
PiperOrigin-RevId: 337396493
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PiperOrigin-RevId: 337384146
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Test helpers should be used for test setup/teardown, not actual
testing. Use cmp.Diff instead of bytes.Equal to improve readability.
PiperOrigin-RevId: 337323242
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This change also brings back the stack.Route.ResolveWith method so that
we can immediately resolve a route when sending an NA in response to a
a NS with a source link layer address option.
Test: ipv6_test.TestNeighorSolicitationResponse
PiperOrigin-RevId: 337185461
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Control messages should be released on Read (which ignores the control message)
or zero-byte Send. Otherwise, open fds sent through the control messages will
be leaked.
PiperOrigin-RevId: 337110774
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All shm segments in an IPC namespace should be released once that namespace is
destroyed. Add reference counting to IPCNamespace so that once the last task
with a reference on it exits, we can trigger a destructor that will clean up
all shm segments that have not been explicitly freed by the application.
PiperOrigin-RevId: 337032977
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PiperOrigin-RevId: 336976081
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PiperOrigin-RevId: 336974095
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PiperOrigin-RevId: 336970511
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PiperOrigin-RevId: 336962937
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Remove the duplicate NA size variable while I'm here.
See https://tools.ietf.org/html/rfc4861#section-4.4 for the packet format.
PiperOrigin-RevId: 336943206
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The sentry page cache stores file contents at page granularity; this is
necessary for memory mappings. Thus file offset ranges passed to
fsutil.FileRangeSet.Fill() must be page-aligned. If the read callback passed to
Fill() returns (partial read, nil error) when reading up to EOF (which is the
case for p9.ClientFile.ReadAt() since 9P's Rread cannot convey both a partial
read and EOF), Fill() will re-invoke the read callback to try to read from EOF
to the end of the containing page, which is harmless but needlessly expensive.
Fix this by handling file size explicitly in fsutil.FileRangeSet.Fill().
PiperOrigin-RevId: 336934075
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Use the correct constant (Solicit, not Advert) while I'm here.
PiperOrigin-RevId: 336924605
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This fixes reference leaks related to accidentally forgetting to DecRef()
after calling one or the other.
PiperOrigin-RevId: 336918922
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The required states may simply not be observed by the thread running bounce, so
track guest and user generations to ensure that at least one of the desired
state transitions happens.
Fixes #3532
PiperOrigin-RevId: 336908216
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In addition to fixing reference leaks, this change also releases memory used
by regular tmpfs files once the containing filesystem is released.
PiperOrigin-RevId: 336833111
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Singleton filesystem like devpts and devtmpfs have a single filesystem shared
among all mounts, so they acquire a "self-reference" when initialized that
must be released when the entire virtual filesystem is released at sandbox
exit.
PiperOrigin-RevId: 336828852
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