I want to note the discussions on clang which recommend pattern instead
of zero, as zero hides bugs and creates a new stuff. They did not intend
to support zero long term.
https://reviews.llvm.org/D54604
https://reviews.llvm.org/D64742
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Oh I have another question: Does this actually turn accessing the
uninitialized variables into defined behavior, or can the optimizer
still treat it as undefined behavior and thus do whatever it want?
Given that this *is* undefined behavior, turning it into defined
behavior with a 0 value would
doko can you please provide more details on why you think this should be
done in dpkg instead of gcc (as we have done for almost all the other
hardening options)? As Kees says, adding it to gcc means not only does
this benefit Ubuntu archive packages, but also any software which is
built on a
** Tags added: sec-994
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https://bugs.launchpad.net/bugs/1972043
Title:
Please add -ftrivial-auto-var-init=zero to default build flags
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Adding it to the compiler means *all* builds benefit, which is the
reason this was done on the other options. People build their local
projects, newer versions of tools from GitHub, etc etc.
This needs to be in the compiler directly.
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** Tags removed: rls-kk-incoming
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Title:
Please add -ftrivial-auto-var-init=zero to default build flags
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** Also affects: dpkg (Ubuntu Kinetic)
Importance: Undecided
Status: New
** Also affects: gcc-12 (Ubuntu Kinetic)
Importance: Wishlist
Status: New
** Changed in: dpkg (Ubuntu Kinetic)
Importance: Undecided => Wishlist
** Tags added: fr-2368
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please not, add it to dpkg instead
** Also affects: dpkg (Ubuntu)
Importance: Undecided
Status: New
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Title:
Please add
** Tags added: rls-kk-incoming
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Title:
Please add -ftrivial-auto-var-init=zero to default build flags
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+1 from the Security team on this - looks like a good easy win for
security with no overhead or other impact from what I can see.
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Title:
Please
Yes, -Wuninitialized continues to warn, even if they were auto-
initialized.
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Title:
Please add -ftrivial-auto-var-init=zero to default build
** Changed in: gcc-12 (Ubuntu)
Importance: Undecided => Wishlist
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Title:
Please add -ftrivial-auto-var-init=zero to default build flags
To
Does Wuninitialized continue working with that flag?
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Title:
Please add -ftrivial-auto-var-init=zero to default build flags
To manage
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