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e06fdaf40a
randstruct plugin, including the task_struct.
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Comment: Kees Cook <kees@outflux.net>
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Merge tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull structure randomization updates from Kees Cook:
"Now that IPC and other changes have landed, enable manual markings for
randstruct plugin, including the task_struct.
This is the rest of what was staged in -next for the gcc-plugins, and
comes in three patches, largest first:
- mark "easy" structs with __randomize_layout
- mark task_struct with an optional anonymous struct to isolate the
__randomize_layout section
- mark structs to opt _out_ of automated marking (which will come
later)
And, FWIW, this continues to pass allmodconfig (normal and patched to
enable gcc-plugins) builds of x86_64, i386, arm64, arm, powerpc, and
s390 for me"
* tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
randstruct: opt-out externally exposed function pointer structs
task_struct: Allow randomized layout
randstruct: Mark various structs for randomization
29 lines
567 B
C
29 lines
567 B
C
#ifndef _LINUX_IPC_H
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#define _LINUX_IPC_H
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#include <linux/spinlock.h>
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#include <linux/uidgid.h>
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#include <uapi/linux/ipc.h>
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#define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
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/* used by in-kernel data structures */
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struct kern_ipc_perm {
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spinlock_t lock;
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bool deleted;
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int id;
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key_t key;
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kuid_t uid;
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kgid_t gid;
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kuid_t cuid;
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kgid_t cgid;
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umode_t mode;
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unsigned long seq;
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void *security;
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struct rcu_head rcu;
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atomic_t refcount;
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} ____cacheline_aligned_in_smp __randomize_layout;
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#endif /* _LINUX_IPC_H */
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