51 lines
2.0 KiB
Diff
51 lines
2.0 KiB
Diff
--- ./sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
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+++ ./sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
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@@ -114,23 +114,13 @@
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// CLONE_VM, nor CLONE_THREAD, which includes all fork() implementations.
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ResultExpr RestrictCloneToThreadsAndEPERMFork() {
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const Arg<unsigned long> flags(0);
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+ const int required = CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
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+ CLONE_THREAD | CLONE_SYSVSEM;
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+ const int safe = CLONE_SETTLS | CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID |
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+ CLONE_DETACHED;
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+ const BoolExpr thread_clone_ok = (flags&~safe)==required;
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- // TODO(mdempsky): Extend DSL to support (flags & ~mask1) == mask2.
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- const uint64_t kAndroidCloneMask = CLONE_VM | CLONE_FS | CLONE_FILES |
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- CLONE_SIGHAND | CLONE_THREAD |
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- CLONE_SYSVSEM;
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- const uint64_t kObsoleteAndroidCloneMask = kAndroidCloneMask | CLONE_DETACHED;
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-
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- const uint64_t kGlibcPthreadFlags =
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- CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | CLONE_THREAD |
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- CLONE_SYSVSEM | CLONE_SETTLS | CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID;
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- const BoolExpr glibc_test = flags == kGlibcPthreadFlags;
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-
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- const BoolExpr android_test =
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- AnyOf(flags == kAndroidCloneMask, flags == kObsoleteAndroidCloneMask,
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- flags == kGlibcPthreadFlags);
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-
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- return If(IsAndroid() ? android_test : glibc_test, Allow())
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+ return If(thread_clone_ok, Allow())
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.ElseIf((flags & (CLONE_VM | CLONE_THREAD)) == 0, Error(EPERM))
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.Else(CrashSIGSYSClone());
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}
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--- ./sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc.orig
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+++ ./sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc
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@@ -494,6 +494,7 @@
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case __NR_mlock:
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case __NR_munlock:
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case __NR_munmap:
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+ case __NR_mremap:
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return true;
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case __NR_madvise:
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case __NR_mincore:
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@@ -509,7 +510,6 @@
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case __NR_modify_ldt:
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#endif
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case __NR_mprotect:
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- case __NR_mremap:
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case __NR_msync:
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case __NR_munlockall:
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case __NR_readahead:
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