diff options
| author | Michael Pratt <mpratt@google.com> | 2018-12-10 12:36:27 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2018-12-10 12:37:16 -0800 |
| commit | 99d595869332f817de8f570fae184658c513a43c (patch) | |
| tree | 0e1309f278df51d47a4059ab9c1ef5c3b37f14ca /pkg/sentry/arch/arch.go | |
| parent | 25b8424d754bd659a0f976f82f7c8846dc2a194f (diff) | |
Validate FS_BASE in Task.Clone
arch_prctl already verified that the new FS_BASE was canonical, but
Task.Clone did not. Centralize these checks in the arch packages.
Failure to validate could cause an error in PTRACE_SET_REGS when we try
to switch to the app.
PiperOrigin-RevId: 224862398
Change-Id: Iefe63b3f9aa6c4810326b8936e501be3ec407f14
Diffstat (limited to 'pkg/sentry/arch/arch.go')
| -rw-r--r-- | pkg/sentry/arch/arch.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pkg/sentry/arch/arch.go b/pkg/sentry/arch/arch.go index 575b7ba66..4cd7a9af5 100644 --- a/pkg/sentry/arch/arch.go +++ b/pkg/sentry/arch/arch.go @@ -115,6 +115,12 @@ type Context interface { // SetStack sets the current stack pointer. SetStack(value uintptr) + // TLS returns the current TLS pointer. + TLS() uintptr + + // SetTLS sets the current TLS pointer. Returns false if value is invalid. + SetTLS(value uintptr) bool + // SetRSEQInterruptedIP sets the register that contains the old IP when a // restartable sequence is interrupted. SetRSEQInterruptedIP(value uintptr) |