Age | Commit message (Collapse) | Author |
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PiperOrigin-RevId: 350375461
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PiperOrigin-RevId: 350223482
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This includes minor fix-ups:
* Handle SIGTERM in runsc debug, to exit gracefully.
* Fix cmd.debug.go opening all profiles as RDONLY.
* Fix the test name in fio_test.go, and encode the block size in the test.
PiperOrigin-RevId: 350205718
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Reported-by: syzbot+814105309d2ae8651084@syzkaller.appspotmail.com
PiperOrigin-RevId: 350159452
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Syzkaller discovered this bug in pipefs by doing something quite strange:
creat(&(0x7f0000002a00)='./file1\x00', 0x0)
mount(&(0x7f0000000440)=ANY=[], &(0x7f00000002c0)='./file1\x00', &(0x7f0000000300)='devtmpfs\x00', 0x20000d, 0x0)
creat(&(0x7f0000000000)='./file1/file0\x00', 0x0)
This can be reproduced with:
touch mymount
mkfifo /dev/mypipe
mount -o ro -t devtmpfs devtmpfs mymount
echo 123 > mymount/mypipe
PiperOrigin-RevId: 349687714
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This allows for a model of profiling when you can start collection, and
it will terminate when the sandbox terminates. Without this synchronous
call, it is effectively impossible to collect length blocking and mutex
profiles.
PiperOrigin-RevId: 349483418
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global
In order to improve the performance, some kpti related codes(TCR.A1) have
been reverted, and set kernel pagetable as global.
Signed-off-by: Robin Luk <lubin.lu@antgroup.com>
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open() has to return ENXIO in this case.
O_PATH isn't supported by vfs1.
PiperOrigin-RevId: 348820478
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PiperOrigin-RevId: 348696094
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PiperOrigin-RevId: 348092999
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PiperOrigin-RevId: 348056159
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PiperOrigin-RevId: 348055514
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Closes #5128
PiperOrigin-RevId: 348052446
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Introduces the per-socket error queue and the necessary cmsg mechanisms.
PiperOrigin-RevId: 348028508
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PiperOrigin-RevId: 347890782
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PiperOrigin-RevId: 347720083
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PiperOrigin-RevId: 347711998
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PiperOrigin-RevId: 347706953
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syzkaller reported the closing of a nil channel. This is only possible when the
AIOContext was destroyed twice.
Some scenarios that could lead to this:
- It died and then some called aioCtx.Prepare() on it and then killed it again
which could cause the double destroy. The context could have been destroyed
in between the call to LookupAIOContext() and Prepare().
- aioManager was destroyed but it did not update the contexts map. So
Lookup could still return a dead AIOContext and then someone could call
Prepare on it and kill it again.
So added a check in aioCtx.Prepare() for the context being dead. This will
prevent a dead context from resurrecting.
Also refactored code to destroy the aioContext consistently. Earlier we were not
munmapping the aioContexts that were destroyed upon aioManager destruction.
Reported-by: syzbot+ef6a588d0ce6059991d2@syzkaller.appspotmail.com
PiperOrigin-RevId: 347704347
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We want to make the recvmsg syscall to the host regardless of if the dst is
empty or not so that:
- Host can populate the control messages if necessary.
- Host can return sender address.
- Host can return appropriate errors.
Earlier because we were using the IOSequence.CopyOutFrom() API, the usermem
package does not even call the Reader function if the destination is empty (as
an optimization).
PiperOrigin-RevId: 347684566
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PiperOrigin-RevId: 347671070
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PiperOrigin-RevId: 347660920
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There are surprisingly few syscall tests that run with hostinet. For example
running the following command only returns two results:
`bazel query test/syscalls:all | grep hostnet`
I think as a result, as our control messages evolved, hostinet was left
behind. Update it to support all control messages netstack supports.
This change also updates sentry's control message parsing logic to make it up to
date with all the control messages we support.
PiperOrigin-RevId: 347508892
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PiperOrigin-RevId: 347437786
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We should not assert that all resources are dropped after saving.
PiperOrigin-RevId: 347420131
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SO_OOBINLINE option is set/get as boolean value, which is the same as linux.
As we currently do not support disabling this option, we always return it as
true.
PiperOrigin-RevId: 347413905
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PiperOrigin-RevId: 347091372
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PiperOrigin-RevId: 347047550
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tcpip.ControlMessages can not contain Linux specific structures which makes it
painful to convert back and forth from Linux to tcpip back to Linux when passing
around control messages in hostinet and raw sockets.
Now we convert to the Linux version of the control message as soon as we are
out of tcpip.
PiperOrigin-RevId: 347027065
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PiperOrigin-RevId: 346973338
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PiperOrigin-RevId: 346923826
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Fixes #5004
PiperOrigin-RevId: 346643745
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AtomicPtrMap is a generic concurrent map from arbitrary keys to arbitrary
pointer values.
Benchmarks:
name time/op
StoreDelete/RWMutexMap-12 335ns ± 1%
StoreDelete/SyncMap-12 705ns ± 3%
StoreDelete/AtomicPtrMap-12 287ns ± 4%
StoreDelete/AtomicPtrMapSharded-12 289ns ± 1%
LoadOrStoreDelete/RWMutexMap-12 342ns ± 2%
LoadOrStoreDelete/SyncMap-12 662ns ± 2%
LoadOrStoreDelete/AtomicPtrMap-12 290ns ± 7%
LoadOrStoreDelete/AtomicPtrMapSharded-12 293ns ± 2%
LookupPositive/RWMutexMap-12 101ns ±26%
LookupPositive/SyncMap-12 202ns ± 2%
LookupPositive/AtomicPtrMap-12 71.1ns ± 2%
LookupPositive/AtomicPtrMapSharded-12 73.2ns ± 1%
LookupNegative/RWMutexMap-12 119ns ± 1%
LookupNegative/SyncMap-12 154ns ± 1%
LookupNegative/AtomicPtrMap-12 84.7ns ± 3%
LookupNegative/AtomicPtrMapSharded-12 86.8ns ± 1%
Concurrent/FixedKeys_1PercentWrites_RWMutexMap-12 1.32µs ± 2%
Concurrent/FixedKeys_1PercentWrites_SyncMap-12 52.7ns ±10%
Concurrent/FixedKeys_1PercentWrites_AtomicPtrMap-12 31.8ns ±20%
Concurrent/FixedKeys_1PercentWrites_AtomicPtrMapSharded-12 24.0ns ±15%
Concurrent/FixedKeys_10PercentWrites_RWMutexMap-12 860ns ± 3%
Concurrent/FixedKeys_10PercentWrites_SyncMap-12 68.8ns ±20%
Concurrent/FixedKeys_10PercentWrites_AtomicPtrMap-12 98.6ns ± 7%
Concurrent/FixedKeys_10PercentWrites_AtomicPtrMapSharded-12 42.0ns ±25%
Concurrent/FixedKeys_50PercentWrites_RWMutexMap-12 1.17µs ± 3%
Concurrent/FixedKeys_50PercentWrites_SyncMap-12 136ns ±34%
Concurrent/FixedKeys_50PercentWrites_AtomicPtrMap-12 286ns ± 3%
Concurrent/FixedKeys_50PercentWrites_AtomicPtrMapSharded-12 115ns ±35%
Concurrent/ChangingKeys_1PercentWrites_RWMutexMap-12 1.27µs ± 2%
Concurrent/ChangingKeys_1PercentWrites_SyncMap-12 5.01µs ± 3%
Concurrent/ChangingKeys_1PercentWrites_AtomicPtrMap-12 38.1ns ± 3%
Concurrent/ChangingKeys_1PercentWrites_AtomicPtrMapSharded-12 22.6ns ± 2%
Concurrent/ChangingKeys_10PercentWrites_RWMutexMap-12 1.08µs ± 2%
Concurrent/ChangingKeys_10PercentWrites_SyncMap-12 5.97µs ± 1%
Concurrent/ChangingKeys_10PercentWrites_AtomicPtrMap-12 390ns ± 2%
Concurrent/ChangingKeys_10PercentWrites_AtomicPtrMapSharded-12 93.6ns ± 1%
Concurrent/ChangingKeys_50PercentWrites_RWMutexMap-12 1.77µs ± 2%
Concurrent/ChangingKeys_50PercentWrites_SyncMap-12 8.07µs ± 2%
Concurrent/ChangingKeys_50PercentWrites_AtomicPtrMap-12 1.61µs ± 2%
Concurrent/ChangingKeys_50PercentWrites_AtomicPtrMapSharded-12 386ns ± 1%
Updates #231
PiperOrigin-RevId: 346614776
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PiperOrigin-RevId: 346496532
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Don't propagate arbitrary golang errors up from fusefs because errors
that don't map to an errno result in a sentry panic.
Reported-by: syzbot+697cb635346e456fddfc@syzkaller.appspotmail.com
PiperOrigin-RevId: 346220306
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PiperOrigin-RevId: 346197760
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PiperOrigin-RevId: 346143528
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PiperOrigin-RevId: 346134026
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Fixes #4991
PiperOrigin-RevId: 345800333
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PiperOrigin-RevId: 345696124
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This is the RWMutex equivalent to the preceding sync.Mutex CL.
Updates #4804
PiperOrigin-RevId: 345681051
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PiperOrigin-RevId: 345589628
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These options allow overriding the signal that gets sent to the process when
I/O operations are available on the file descriptor, rather than the default
`SIGIO` signal. Doing so also populates `siginfo` to contain extra information
about which file descriptor caused the event (`si_fd`) and what events happened
on it (`si_band`). The logic around which FD is populated within `si_fd`
matches Linux's, which means it has some weird edge cases where that value may
not actually refer to a file descriptor that is still valid.
This CL also ports extra S/R logic regarding async handler in VFS2.
Without this, async I/O handlers aren't properly re-registered after S/R.
PiperOrigin-RevId: 345436598
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Previous experience has shown that these types of wrappers tends to create two
kinds of problems: hidden allocations (e.g. each call to
FileReadWriteSeeker.Read/Write allocates a usermem.BytesIO on the heap) and
hidden lock ordering problems (e.g. VFS1 splice deadlocks). Since this is only
needed by fsimpl/verity, move it there.
PiperOrigin-RevId: 345377830
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`slice := *(*[]unsafe.Pointer)(...)` makes a copy of the slice header, which
then escapes because of the conditional `atomic.StorePointer(&f.slice, &slice)`
from table expansion. This occurs even when the table doesn't expand, and when
it can't (e.g. `close()` => `f.setAll(nil)`). Fix this by avoiding the copy
until after table expansion.
Before this CL:
```
TEXT pkg/sentry/kernel/kernel.(*FDTable).setAll(SB) pkg/sentry/kernel/fd_table_unsafe.go
fd_table_unsafe.go:119 0x7f00005f50e0 64488b0c25f8ffffff MOVQ FS:0xfffffff8, CX
fd_table_unsafe.go:119 0x7f00005f50e9 483b6110 CMPQ 0x10(CX), SP
fd_table_unsafe.go:119 0x7f00005f50ed 0f864d040000 JBE 0x7f00005f5540
fd_table_unsafe.go:119 0x7f00005f50f3 4883c480 ADDQ $-0x80, SP
fd_table_unsafe.go:119 0x7f00005f50f7 48896c2478 MOVQ BP, 0x78(SP)
fd_table_unsafe.go:119 0x7f00005f50fc 488d6c2478 LEAQ 0x78(SP), BP
fd_table_unsafe.go:120 0x7f00005f5101 488b8424a8000000 MOVQ 0xa8(SP), AX
fd_table_unsafe.go:120 0x7f00005f5109 4885c0 TESTQ AX, AX
fd_table_unsafe.go:120 0x7f00005f510c 7411 JE 0x7f00005f511f
fd_table_unsafe.go:120 0x7f00005f510e 488b8c24b0000000 MOVQ 0xb0(SP), CX
fd_table_unsafe.go:120 0x7f00005f5116 4885c9 TESTQ CX, CX
fd_table_unsafe.go:120 0x7f00005f5119 0f8500040000 JNE 0x7f00005f551f
fd_table_unsafe.go:124 0x7f00005f511f 488d05da115700 LEAQ 0x5711da(IP), AX
fd_table_unsafe.go:124 0x7f00005f5126 48890424 MOVQ AX, 0(SP)
fd_table_unsafe.go:124 0x7f00005f512a e8d19fa1ff CALL runtime.newobject(SB)
fd_table_unsafe.go:124 0x7f00005f512f 488b7c2408 MOVQ 0x8(SP), DI
fd_table_unsafe.go:124 0x7f00005f5134 488b842488000000 MOVQ 0x88(SP), AX
fd_table_unsafe.go:124 0x7f00005f513c 488b4820 MOVQ 0x20(AX), CX
fd_table_unsafe.go:124 0x7f00005f5140 488b5108 MOVQ 0x8(CX), DX
fd_table_unsafe.go:124 0x7f00005f5144 488b19 MOVQ 0(CX), BX
fd_table_unsafe.go:124 0x7f00005f5147 488b4910 MOVQ 0x10(CX), CX
fd_table_unsafe.go:124 0x7f00005f514b 48895708 MOVQ DX, 0x8(DI)
fd_table_unsafe.go:124 0x7f00005f514f 48894f10 MOVQ CX, 0x10(DI)
fd_table_unsafe.go:124 0x7f00005f5153 833df6e1120100 CMPL $0x0, runtime.writeBarrier(SB)
fd_table_unsafe.go:124 0x7f00005f515a 660f1f440000 NOPW 0(AX)(AX*1)
fd_table_unsafe.go:124 0x7f00005f5160 0f8589030000 JNE 0x7f00005f54ef
fd_table_unsafe.go:124 0x7f00005f5166 48891f MOVQ BX, 0(DI)
fd_table_unsafe.go:124 0x7f00005f5169 48897c2470 MOVQ DI, 0x70(SP)
fd_table_unsafe.go:127 0x7f00005f516e 8bb424a0000000 MOVL 0xa0(SP), SI
fd_table_unsafe.go:127 0x7f00005f5175 39d6 CMPL DX, SI
fd_table_unsafe.go:127 0x7f00005f5177 0f8c5f030000 JL 0x7f00005f54dc
...
```
After this CL:
```
TEXT pkg/sentry/kernel/kernel.(*FDTable).setAll(SB) pkg/sentry/kernel/fd_table_unsafe.go
fd_table_unsafe.go:119 0x7f00005f50e0 64488b0c25f8ffffff MOVQ FS:0xfffffff8, CX
fd_table_unsafe.go:119 0x7f00005f50e9 488d4424e8 LEAQ -0x18(SP), AX
fd_table_unsafe.go:119 0x7f00005f50ee 483b4110 CMPQ 0x10(CX), AX
fd_table_unsafe.go:119 0x7f00005f50f2 0f868e040000 JBE 0x7f00005f5586
fd_table_unsafe.go:119 0x7f00005f50f8 4881ec98000000 SUBQ $0x98, SP
fd_table_unsafe.go:119 0x7f00005f50ff 4889ac2490000000 MOVQ BP, 0x90(SP)
fd_table_unsafe.go:119 0x7f00005f5107 488dac2490000000 LEAQ 0x90(SP), BP
fd_table_unsafe.go:120 0x7f00005f510f 488b9424c0000000 MOVQ 0xc0(SP), DX
fd_table_unsafe.go:120 0x7f00005f5117 660f1f840000000000 NOPW 0(AX)(AX*1)
fd_table_unsafe.go:120 0x7f00005f5120 4885d2 TESTQ DX, DX
fd_table_unsafe.go:120 0x7f00005f5123 0f8406040000 JE 0x7f00005f552f
fd_table_unsafe.go:120 0x7f00005f5129 488b9c24c8000000 MOVQ 0xc8(SP), BX
fd_table_unsafe.go:120 0x7f00005f5131 4885db TESTQ BX, BX
fd_table_unsafe.go:120 0x7f00005f5134 0f852b040000 JNE 0x7f00005f5565
fd_table_unsafe.go:124 0x7f00005f513a 488bb424a0000000 MOVQ 0xa0(SP), SI
fd_table_unsafe.go:124 0x7f00005f5142 488b7e20 MOVQ 0x20(SI), DI
fd_table_unsafe.go:127 0x7f00005f5146 4c8b4708 MOVQ 0x8(DI), R8
fd_table_unsafe.go:127 0x7f00005f514a 448b8c24b8000000 MOVL 0xb8(SP), R9
fd_table_unsafe.go:127 0x7f00005f5152 4539c1 CMPL R8, R9
fd_table_unsafe.go:127 0x7f00005f5155 0f8d4a020000 JGE 0x7f00005f53a5
...
```
PiperOrigin-RevId: 345363242
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This change lets us split the v4 stats from the v6 stats, which will be
useful when adding stats for each network endpoint.
PiperOrigin-RevId: 345322615
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Moved AddressAndFamily() and ConvertAddress() to socket package from netstack.
This helps because these utilities are used by sibling netstack packages.
Such sibling dependencies can later cause circular dependencies. Common utils
shared between siblings should be moved up to the parent.
PiperOrigin-RevId: 345275571
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Refactor some utilities and rename some others for clarity.
PiperOrigin-RevId: 345247836
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PiperOrigin-RevId: 345178956
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PiperOrigin-RevId: 344958513
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