diff options
| -rw-r--r-- | pkg/sentry/syscalls/linux/sys_splice.go | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/pkg/sentry/syscalls/linux/sys_splice.go b/pkg/sentry/syscalls/linux/sys_splice.go index f47518f33..b6517313f 100644 --- a/pkg/sentry/syscalls/linux/sys_splice.go +++ b/pkg/sentry/syscalls/linux/sys_splice.go @@ -48,12 +48,12 @@ func doSplice(t *kernel.Task, outFile, inFile *fs.File, opts fs.SpliceOpts, nonB if ch == nil { ch = make(chan struct{}, 1) } - if !inW && inFile.Readiness(EventMaskRead) == 0 && !inFile.Flags().NonBlocking { + if !inW && !inFile.Flags().NonBlocking { w, _ := waiter.NewChannelEntry(ch) inFile.EventRegister(&w, EventMaskRead) defer inFile.EventUnregister(&w) inW = true // Registered. - } else if !outW && outFile.Readiness(EventMaskWrite) == 0 && !outFile.Flags().NonBlocking { + } else if !outW && !outFile.Flags().NonBlocking { w, _ := waiter.NewChannelEntry(ch) outFile.EventRegister(&w, EventMaskWrite) defer outFile.EventUnregister(&w) @@ -65,6 +65,11 @@ func doSplice(t *kernel.Task, outFile, inFile *fs.File, opts fs.SpliceOpts, nonB break } + if (!inW || inFile.Readiness(EventMaskRead) != 0) && (!outW || outFile.Readiness(EventMaskWrite) != 0) { + // Something became ready, try again without blocking. + continue + } + // Block until there's data. if err = t.Block(ch); err != nil { break |