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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-11-30 15:57:13 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-12-02 18:31:09 +0400 |
| commit | 06aae6834eb473c94a2493c145fc3e6c9fcf26a5 (patch) | |
| tree | 034c17ae409adb1867ac370f3bd8029357328b95 /arch/s390/kernel/vdso.c | |
| parent | 8cb04be88656ad20ba7cb017726c73b7f33796fb (diff) | |
| download | linux-06aae6834eb473c94a2493c145fc3e6c9fcf26a5.tar.xz | |
s390/vdso: fix access-list entry initialization
The access-list entry is supposed to have the fetch-only bit set, however
a reserved bit got set instead.
Userspace isn't able to write to the page anyway since the accessed page
has the read-only bit set. So this saves us only for bad surprises in the
future if the reserved bit gets used.
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/vdso.c')
| -rw-r--r-- | arch/s390/kernel/vdso.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c index a84476f2a9bb..613649096783 100644 --- a/arch/s390/kernel/vdso.c +++ b/arch/s390/kernel/vdso.c @@ -125,7 +125,7 @@ int vdso_alloc_per_cpu(struct _lowcore *lowcore) psal[i] = 0x80000000; lowcore->paste[4] = (u32)(addr_t) psal; - psal[0] = 0x20000000; + psal[0] = 0x02000000; psal[2] = (u32)(addr_t) aste; *(unsigned long *) (aste + 2) = segment_table + _ASCE_TABLE_LENGTH + _ASCE_USER_BITS + _ASCE_TYPE_SEGMENT; |