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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2011-01-12 09:55:31 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2011-01-12 09:55:25 +0100 |
| commit | d2c9dfccbc3a449b9677772e7496e2656049d9f3 (patch) | |
| tree | f62cf27ddee310af28244bcfbc8eb2e197ed629c /arch/s390/kernel | |
| parent | 3351918282fd664e918a3175ddfae9b15656122e (diff) | |
| download | lwn-d2c9dfccbc3a449b9677772e7496e2656049d9f3.tar.gz lwn-d2c9dfccbc3a449b9677772e7496e2656049d9f3.zip | |
[S390] Randomize PIEs
Randomize ELF_ET_DYN_BASE, which is used when loading position
independent executables.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/process.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 26d48fe72999..a895e69379f7 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -359,3 +359,14 @@ unsigned long arch_randomize_brk(struct mm_struct *mm) return mm->brk; return ret; } + +unsigned long randomize_et_dyn(unsigned long base) +{ + unsigned long ret = PAGE_ALIGN(base + brk_rnd()); + + if (!(current->flags & PF_RANDOMIZE)) + return base; + if (ret < base) + return base; + return ret; +} |