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[S390] vdso: fix per cpu vdso pointer in lowcore

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The vdso_per_cpu_data entry in the lowcore structure uses __u32
instead of __u64. If the data page is above 4GB the pointer is
truncated and the kernel crashes.

Reported-by: Mijo Safradin <mijo@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2009-02-11 10:37:28 +01:00
parent 1db8508cf4
commit d5e842c4b7
1 changed files with 2 additions and 2 deletions
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4
arch/s390/include/asm/lowcore.h
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@@ -384,8 +384,8 @@ struct _lowcore
__u32 panic_magic; /* 0xe00 */ __u32 panic_magic; /* 0xe00 */
/* Per cpu primary space access list */ /* Per cpu primary space access list */
__u8 pad_0xe04[0xe3c-0xe04]; /* 0xe04 */ __u8 pad_0xe04[0xe38-0xe04]; /* 0xe04 */
__u32 vdso_per_cpu_data; /* 0xe3c */ __u64 vdso_per_cpu_data; /* 0xe38 */
__u32 paste[16]; /* 0xe40 */ __u32 paste[16]; /* 0xe40 */
__u8 pad13[0x11b8-0xe80]; /* 0xe80 */ __u8 pad13[0x11b8-0xe80]; /* 0xe80 */